API Development is an effective way for software to communicate and interact with each other over the internet. It’s a great way for developers to expand the capabilities of a program or systems by creating interfaces and allow data to be shared between different types of technology. With an API, existing systems can connect and more advanced solutions can be made. Hiring an API Developer can enable businesses to streamline processes and enable a much faster integration of existing software solutions.

API Developers are skilled engineers specialized in creating new APIs and maintaining existing ones. They are responsible for developing and troubleshooting current APIs, designing APIs from standards-based web services, maintaining inventory and implementing authorization mechanisms. Additionally, they incorporate different technologies together to create advanced software solutions that integrate cloud systems like Amazon Web Services or MongoDB and APIs with point-and-click platforms, like WordPress or HubSpot.

Here’s some projects that our expert API Developer made real:

  • Creating advanced databases on different cloud systems
  • Linking between two cameras from a microscope
  • Interfacing with customizing Wordpress themes, Woocommerce themes and SMS services
  • Building secure back end systems to analyze different public APIs
  • Applying sophisticated authorization mechanisms
  • Creating comprehensive ecommerce websites using MERN Stack
  • Developing node APIs for exchange markets using Node.js, Web3.js, Ether.js
  • Automatically out of stocking items from supplier’s stock through an API system.

It is no surprise that good API Development is the cornerstone of many successful software solutions. Our expert API Developers are well experienced in developing suitable solutions for projects ranging from app development to SaaS applications, game development to enterprise system integrations. WithFreelancer.com, businesses can easily hire one of these skilled professionals to build their own bespoke projects that are perfectly tailored for their needs. So why not post your own project on Freelancer today and hire an expert API Developer?

From 93,625 reviews, clients rate our API Developers 4.91 out of 5 stars.
Hire API Developers

API Development is an effective way for software to communicate and interact with each other over the internet. It’s a great way for developers to expand the capabilities of a program or systems by creating interfaces and allow data to be shared between different types of technology. With an API, existing systems can connect and more advanced solutions can be made. Hiring an API Developer can enable businesses to streamline processes and enable a much faster integration of existing software solutions.

API Developers are skilled engineers specialized in creating new APIs and maintaining existing ones. They are responsible for developing and troubleshooting current APIs, designing APIs from standards-based web services, maintaining inventory and implementing authorization mechanisms. Additionally, they incorporate different technologies together to create advanced software solutions that integrate cloud systems like Amazon Web Services or MongoDB and APIs with point-and-click platforms, like WordPress or HubSpot.

Here’s some projects that our expert API Developer made real:

  • Creating advanced databases on different cloud systems
  • Linking between two cameras from a microscope
  • Interfacing with customizing Wordpress themes, Woocommerce themes and SMS services
  • Building secure back end systems to analyze different public APIs
  • Applying sophisticated authorization mechanisms
  • Creating comprehensive ecommerce websites using MERN Stack
  • Developing node APIs for exchange markets using Node.js, Web3.js, Ether.js
  • Automatically out of stocking items from supplier’s stock through an API system.

It is no surprise that good API Development is the cornerstone of many successful software solutions. Our expert API Developers are well experienced in developing suitable solutions for projects ranging from app development to SaaS applications, game development to enterprise system integrations. WithFreelancer.com, businesses can easily hire one of these skilled professionals to build their own bespoke projects that are perfectly tailored for their needs. So why not post your own project on Freelancer today and hire an expert API Developer?

From 93,625 reviews, clients rate our API Developers 4.91 out of 5 stars.
Hire API Developers

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    I am launching an online marketplace in Arabic that connects customers with nearby service providers for household, office, and vehicle issues—think of Uber’s matching experience, but for plumbers, electricians, mechanics, carpenters, and similar trades. Phase one is a fully-functional website that will later feed our iOS and Android apps, so clean, well-documented code and a robust API layer are essential. Core experience I need you to deliver: • Customers create an account, describe their issue, and upload photos or video directly through the site. • Providers within a configurable radius see the request and submit an offer that includes price (fixed or hourly), ETA, and estimated completion time. • The site automatically compiles incoming offers in a ...

    $452 Average bid
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    224 bids

    WhatsApp API (XpressBot) Integration with DaySchedule API Project Overview I am using the WhatsApp Business API through and want to integrate the DaySchedule API into my WhatsApp chatbot. The goal is to allow users to book appointments directly within the WhatsApp conversation without leaving the chat. Requirements - Integrate the DaySchedule API with my existing XpressBot WhatsApp bot. - Display available appointment dates and time slots to users. - Allow users to select their preferred date and time through WhatsApp interactive messages (buttons or list messages if supported). - Create the appointment in DaySchedule after the user confirms the slot. - Send a confirmation message with the booking details. - Handle errors such as unavailable slots or API failures gracefully. - Provid...

    $9 Average bid
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    I need a full-stack AI solution that can analyse user behaviour on my website and serve accurate product recommendations in real time. The focus is strictly a product recommendation engine—think “Customers who viewed this item also liked…,” driven by collaborative and content-based filtering, reinforced with machine-learning techniques such as matrix factorisation or deep-learning embeddings where appropriate. Here is how I picture the engagement: • Model design and training: You will work with the historical purchase, click-stream and catalogue data I provide, choose the most suitable algorithms, handle data cleansing, feature engineering and model evaluations. And ving v v by • API or micro-service deployment: The trained model must run behind...

    $6 Average bid
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    2 bids

    LipaSwitch is looking for a digital commerce platform that combines a payment gateway, hosted checkout, online storefront, payment links, and developer APIs into a single ecosystem. Rather than requiring businesses to build their own payment infrastructure, Snippe provides ready-to-use tools for selling products and accepting payments online. It is designed for creators, freelancers, SMEs, merchants, and developers. ⸻ Platform Architecture The platform consists of four core layers: SNIPPE PLATFORM Merchant Dashboard │ ┌──────────────┬─────────┴──────────┬──────────────┐ │ │ │ │ ▼ ▼ ▼ ▼ Payment Online Store Payment API Mobile App Links...

    $2118 Average bid
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    223 bids

    I need a clean, reliable bridge built between our DonorPerfect CRM and DonorDrive (Bonterra) so the moment someone registers for one of our fundraising events, every relevant detail moves automatically into DonorPerfect. The DonorPerfect online API user manual is ready for you; DonorDrive also exposes an API and webhooks we can use. For each fundraiser we run, I have to keep three data streams perfectly aligned: attendee information, their donation records, and their event-registration status. Here’s what success looks like: • A secure, documented integration (REST, webhooks, or middleware—your call) that pushes and pulls attendee profiles, donations, and registration states in real time or on a tight schedule. • Error handling and logging I can read without a ...

    $305 Average bid
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    237 bids

    AI Newsroom Web Application (Version 1) I need a simple web application for a Tamil newspaper newsroom. This is not a full CMS. It is only an AI-powered tool to help editors translate and edit news. Features Required 1. English to Tamil Translation Integrate Sarvam AI API. User pastes English news and gets Tamil translation. 2. Tamil News Rewrite Integrate OpenAI (ChatGPT) API. Rewrite the translated news in a newspaper style. Correct spelling, grammar and sentence structure. Do not change the meaning of the news. The output should be ready for editorial use. 3. Headline Suggestions Generate 5–10 Tamil headline suggestions for the news article. 4. Copy Button One-click copy of the final news. User Interface Keep the UI very simple. Large text area for English news. Transl...

    $72 Average bid
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    52 bids

    I already have sales invoices sitting in our Sage-native database and need them posted automatically into Sage 50 Accounts (UK). Using the Sage 50 COM/SDK, please create a small Windows service or script that runs once a day, reads the un-posted invoices from the same Sage database, posts them, and then flags them as completed so we never hit duplicates. Everything must first be proven on a full copy of the live company file; I want to see successful test runs and logs before anything touches production. Key points you should know while planning the build: • Source format: invoices are stored directly in the Sage database, not CSV, XML, or any external store. • Schedule: the task must trigger daily without manual intervention—Windows Task Scheduler or a similar reliable m...

    $1470 Average bid
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    148 bids
    Lapu Recharge System Build
    6 days left
    Verified

    I need a complete LAPU-based recharge system delivered as two tightly-integrated products: 1) A Windows desktop portal focused on recharge management. It must let me load SIM balances, trigger single or multiple top-ups, view live status, and track every transaction in real time. The workflow should feel similar to the standard LAPU devices used by telecom distributors, only on a PC. Clean UI, role-based access, and an underlying database that keeps a permanent, searchable log are essential. 2) A companion Android application for agents and end users. At a minimum the app should allow them to initiate a recharge, receive instant feedback from the LAPU SIM, and sync all activity back to the desktop portal through a secure API. I am open to adding extras such as sign-in, push alerts, o...

    $287 Average bid
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    49 bids

    I need a senior-level Shopify App developer who can take a brand-new idea from whiteboard to a fully deployed, production-ready app inside the Shopify ecosystem. The app will live exclusively in the admin area and be used by store owners, so every screen must follow Polaris guidelines and integrate cleanly through App Bridge. Multilingual support is not required. Scope of work You will design the architecture, set up the repo with Shopify CLI, and code the back-end in either Node.js or Laravel—whichever you work fastest in—while exposing all data through Shopify Admin API calls (GraphQL or REST as appropriate). OAuth authentication, secure webhook handling, and settings management need to be wired up from the start, with a clean UI for merchants to configure the app. Testin...

    $288 Average bid
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    64 bids
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    78 bids

    I’m putting together this desccription to build an online marketplace. The platform needs to let independent vendors sign up, list their apps, set pricing, and deliver files or license keys automatically once a purchase clears. Shoppers must be able to browse, search, add to cart, pay via Stripe or PayPal, and receive an instant download link in their account and by email. Key functions I have in mind include a vendor dashboard (product management, sales reporting, payout requests), a buyer dashboard (order history, re-downloads, invoices), role-based admin controls, and a clean, mobile-responsive storefront. Security is critical—please implement best-practice user authentication, HTTPS everywhere, and webhook-verified payment handling. Stack choice is open: Laravel, Django, ...

    $7 / hr Average bid
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    75 bids

    I am creating a real-world-asset tokenization platform that will run on Ethereum, and I need a developer who is equally comfortable writing Solidity smart contracts and building a Node.js backend that speaks fluently to those contracts through web3 libraries.

    $65 / hr Average bid
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    93 bids

    I need a developer to help configure a Raspberry Pi and set up Flask to create a web interface for prayer time software. Essential tasks include: - Configuring Raspberry Pi - Setting up Flask to create a user-friendly web interface - Integrating prayer time software functionalities Ideal Skills and Experience: - Proficiency in Python and Flask - Experience with Raspberry Pi configuration - Ability to develop intuitive web interfaces Looking forward to your expertise!

    $24 Average bid
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    42 bids
    Service Review Collection API
    6 days left
    Verified

    I need a lightweight, subscription-ready API that can automatically pull in service reviews from Google and expose just two data points per review: the review text and its star rating. All other metadata can stay out of scope for now. You will find a short functional outline in this document: We may expand later to Yelp and Facebook, so designing the data layer with future providers in mind will be appreciated.

    $460 Average bid
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    205 bids

    I am building a dedicated online marketplace for South African school communities where families can buy and sell pre-loved school essentials. The platform must let users list and purchase School uniforms, Textbooks, Sports equipment and even Sports clothes, but always in a way that keeps each item clearly linked to the correct school. Key workflow • Parents or guardians create an account, select (or add) their school, and upload item details with photos and prices. • Buyers browse or search by school and category, add items to a cart, pay securely, and arrange delivery or collection. • On each completed sale, an automatic commission is reserved for the associated school; periodic payouts go straight to the school’s bank account while the seller receives the bal...

    $6705 Average bid
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    294 bids

    We are seeking an elite Senior Full-Stack Developer or a highly capable Development Team/Agency to take ownership of, maintain, and execute a massive expansion (Phase 3) of an established, production-grade consumer platform. The core infrastructure and initial surfaces are completely live. Phase 3 represents a major green-field extension, introducing an entire vendor/merchant ecosystem, complex new database domains, transactional/financial capabilities, and advanced security layers. The codebase is clean, well-architected, and strictly follows multi-environment development pipelines. ### Tech Stack & Current System Surfaces All surfaces share a single centralized backend API and a unified backend-as-a-service database instance. #### 1. Mobile Application (Flutter/Dart) * **Architectur...

    $295 Average bid
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    100 bids

    I'm looking to build an e-commerce website for my tea brand. The site will sell loose leaf teas, packaged tea bags, and tea accessories. Key functionalities: - User accounts and login - Product reviews and ratings - Discount codes and promotions Ideal skills and experience: - Proven experience in developing e-commerce websites - Strong understanding of user account systems and review/rating integrations - Ability to implement discount code functionalities - Familiarity with the tea market is a plus, but not required Please provide a portfolio with relevant projects. Looking forward to your bids!

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    146 bids

    I am looking for a simple tool that works with Marketplace ((Viagogo Seller Tool)) to price ticket inventory by monitoring events and adjusting the pricing of these via a set of specific rules. The tool should have the following features: - Be able to monitor and price thousands of events going by the prices set by competitors. - Be able to change the prices in real time through our existing Viagogo account or by a method suggested by you? - Each listing of tickets to have a specific set of rules which can be changed per listing such as, Ignoring prices under/over a certain amount, ignoring single tickets, ignoring certain blocks, price according to ticket type (Standing/Seated/Lower Tier/Upper Tier). - Prices set online to beat the price its competing against by 1cent/1pence, or by a per...

    $377 Average bid
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    204 bids

    I’m expanding our engineering group to tackle several green-field products that blend full-stack web work with a major AI initiative. My most urgent need is someone who lives and breathes machine learning—specifically model training and optimisation—and is comfortable doing it in Python. You’ll take ownership of the entire training workflow: building data pipelines, crafting efficient training loops, fine-tuning models, and squeezing every drop of performance out of our GPU clusters on AWS. Because the broader team also works in Rust micro-services and Ruby on Rails APIs, an appreciation for end-to-end software delivery is important; your models will eventually power customer-facing features served from those back-ends. Core responsibilities • Design and impl...

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    176 bids

    English Hello, I am looking to develop a professional taxi company website in Belgium but for internationaal website for work with the same quality and functionality as leading platforms such as Welcome Pickups, Blacklane, and Mozio like uber and bolt I need a complete online booking platform, not just a simple company website. The website should include: * Professional online booking system. * Pickup and destination selection using Google Maps. * Automatic distance, travel time, and fare calculation. * Multiple vehicle categories with photos, prices, passenger capacity, and luggage capacity. * Instant and scheduled bookings. * Online payments (Bancontact, Visa, Mastercard, Apple Pay, Google Pay, PayPal) as well as cash payment. * Booking confirmation via Email and WhatsApp. * Full ad...

    $371 Average bid
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    414 bids

    I need an AI-driven web portal that takes repetitive office work off my plate. The core goal is process automation: • Task scheduling – the app must connect to Google or Outlook calendars and push deadline reminders so nothing slips. • Email handling – automatically sort, tag, and draft responses where it can, leaving only the exceptions for me. • Report generation – pull data from our CRM and marketing tools, then compile clear PDF or dashboard-style reports. • Lead management – spot “hot” leads in real time and trigger workflows that nurture or route them, plus run periodic campaigns to generate fresh leads. A clean browser interface, solid user-management, and well-documented APIs are essential so future features can be a...

    $482 Average bid
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    294 bids

    I need a full-featured online casino portal that mirrors the clean look and smooth flow of while adding several key elements of my own. Core gameplay • Slot machines are the main attraction, and I want both classic three-reel titles and progressive-jackpot slots running on a provably fair RNG. • A Teen Patti module should sit alongside the slots so players can switch games without leaving the lobby. Player experience • Users must be able to register, log in, and recover passwords easily. • Each player will have a profile page that shows balance, recent play history, and KYC status. • A tiered loyalty program with points, levels, and redeemable rewards needs to be baked in from day one. Payments The entire site has to integrate a Chinese payment gate...

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    39 bids

    I’m looking for an experienced developer who can step in and take ownership of a new digital build from day one. The exact product scope is still open, so your versatility—whether that means shaping a web interface, crafting a mobile experience, or engineering a standalone application—will be essential. Here’s what I have in mind right now: • Collaborate with me to clarify requirements, select the right tech stack, and draft an actionable roadmap. • Produce clean, well-documented code and commit regularly to a shared repository (GitHub or GitLab). • Handle deployment and basic DevOps so we can move from prototype to a production-ready release with minimal friction. • Communicate progress transparently, flagging risks early and suggestin...

    $11 Average bid
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    25 bids
    NSE OMS C Development
    5 days left
    Verified

    I am upgrading an in-house Order Management System written entirely in C so that it talks directly to the National Stock Exchange. The scope is focused on three core capabilities: • Order routing that can push and cancel orders at millisecond latency • A pre-trade risk layer (position checks, quantity / value limits, fat-finger filters) that sits in the same process for minimum hop time • A real-time market-data feed handler that keeps my books and quotes in sync with the exchange The platform must cover both equity and derivatives segments of NSE and accept market and limit instructions, including everything we typically route through the FO segment. You may reuse clean, well-documented modules you already have, but the final build has to compile cleanly with gcc/clan...

    $9 / hr Average bid
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    14 bids

    We are looking for a developer who can quickly understand an existing codebase, write clean and maintainable code, communicate clearly, and take ownership of ongoing development. Experience building SaaS platforms, AI applications, API integrations and scalable cloud solutions is highly desirable. Experience with hospitality technology is an advantage but not essential

    $33 / hr Average bid
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    217 bids

    KnowChamp Answer Right, Shine Bright The main purpose of this contest app is to develop skills among all users. Through this, any individual, professional or any student or its Knowledge, Critical Thinking, Memory Improvement, Social Interaction, Confidence Building, Competitive Spirit, Preparation for Future Opportunities. Starting from school level, there will be various contests on different subjects, topics in this app. You can know what questions will be related to a specific contest by clicking on the details of that contest. Rules 1. You can find out what questions will be related to the topic in the contest by clicking on the details of that contest. 2. Suppose you join a contest, but as long as no one else joins that contest, that contest will not start. 3. Each contest will hav...

    $1094 Average bid
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    106 bids

    I am looking for an experienced developer to build a lightweight scraping and data-collection tool that gathers publicly available developer profile information from selected trading, blockchain, and software-development platforms. The collected data may include developer name, username, profile URL, technical skills, activity history, projects, reputation indicators, location, and publicly listed contact or social links. The system should clean, normalize, remove duplicates, and store the information in a searchable database. **Main Deliverables** * Scraper for several approved public websites * Searchable developer database * Duplicate detection and data normalization * Filters by skills, activity, platform, location, and reputation * CSV or JSON export * Basic documentation and setup...

    $2047 Average bid
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    200 bids

    I’m replacing our summary-based workflow with a true Retrieval-Augmented Generation pipeline and need a collaborator who can own both the backend and the React front end. The core objective is accuracy: every PDF we receive from clients must be chunked, embedded, stored in Qdrant, and then retrieved at query time so the language model can cite exact passages, never a lossy summary. You’ll wire this flow together with Python services and Node/Fastify APIs, expose it to the UI in Typescript/React, and keep everything humming inside our OpenAI-powered evaluation layer. What I’ll lean on you for • Architecting and implementing the end-to-end RAG pipeline (chunking strategy, embedding jobs, vector-store schema, retrieval functions). • Building real-time docum...

    $17 / hr Average bid
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    276 bids

    I need to build an AI power Business Intelligence platform with dashboard-style SaaS with analytics, NLP querying, conversational analytics, and forecasting. Need a seamless platform which breakdown silos for my clients in the automotive vertical, mainly car dealerships who weave in and out of 10-15 platforms. Need a platform the easily connects with APIs and connects to media advertising and CRM and DMS like Tekion, CDK Global, and Reynolds. Three main goals for the SaaS which has a revenue structure of paid monthly subscriptions. 1) Fast daily data updates, easy to use and customizable dashboard interface for users to see KPIs, MoM, YoY for leads, sales, close rates, and toggle between dealers and choose which dimensions to include for metrics like close rate (Option to choose which lead...

    $7111 Average bid
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    Key Responsibilities: • Lead the architecture, design, and delivery of Salesforce Commerce Cloud solutions (B2C/B2B). • Develop and present proof-of-concepts (POCs) to demonstrate solution feasibility and value. • Partner with the presales team to understand client requirements, design scalable solutions, and deliver impactful client presentations. • Translate business needs into technical architecture and integration strategies across Salesforce ecosystem and third-party systems (OMS, ERP, CRM, Payment Gateways, etc.). • Provide technical leadership and guidance to development teams, ensuring adherence to best practices and coding standards. • Collaborate with stakeholders on estimations, proposals, RFPs, and solution roadmaps. • Stay ahead of Salesforce...

    $20 / hr Average bid
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    42 bids

    Full DayZ Killfeed + Server Management Platform (Web + Discord + Nitrado API)** I’m looking for an experienced developer to build a **complete DayZ killfeed and server management platform** with both a **front‑end user portal** and a **back‑end admin dashboard**, plus a **Discord bot** and **Nitrado long‑life token integration**. This must be a **fully owned system** — I want full source code, full control, and the ability to host and sell access to users. --- ## **Core Requirements** ### **1. Web Platform** #### **Admin Dashboard (Back End)** - Manage global settings - Manage users, subscriptions, permissions - Control all bot instances - View logs, analytics, heatmaps - Configure Nitrado API settings - File manager (JSON/XML/CFG editing) - Scheduler + automat...

    $189 Average bid
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    195 bids

    I'm looking for an experienced developer to automate the testing of our RESTful APIs using WebdriverIO and the Mocha framework, within Visual Studio. Key Requirements: - Test aspects: - Endpoint functionality - Data validation - Error handling - Authentication: Basic Auth Ideal Skills: - Proficient in WebdriverIO and Mocha - Experience with RESTful API testing - Strong understanding of Basic Auth and API security - Familiarity with Visual Studio environment I look forward to your proposals!

    $15 Average bid
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    19 bids

    I'm looking for an experienced developer to automate the testing of our RESTful APIs using WebdriverIO and the Mocha framework, within Visual Studio. Key Requirements: - Test aspects: - Endpoint functionality - Data validation - Error handling - Authentication: Basic Auth Ideal Skills: - Proficient in WebdriverIO and Mocha - Experience with RESTful API testing - Strong understanding of Basic Auth and API security - Familiarity with Visual Studio environment I look forward to your proposals!

    $15 Average bid
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    14 bids

    I’m building a multi-tenant, white-label SaaS that reimagines service management through AI. The immediate focus is on the workflow automation and knowledge management modules, so I need an engineer or small team that can take these two pillars from concept to production-ready code while keeping the rest of the platform architecture extensible. Core scope • Workflow automation: drag-and-drop builder, branching logic, SLA timers and AI-driven task recommendations. • Knowledge management: versioned articles, smart search, semantic tagging and feedback loops that train the AI. • Incident & asset tracking hooks: the data model and APIs must already support real-time tracking, detailed reporting and smooth hand-offs to external systems. • Integrations: fir...

    $524 Average bid
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    251 bids

    I’m planning a small-scale project that connects a large-language-model back end to a simple web interface so it can take user-supplied text and return a concise, well-structured summary. Core scope • Integrate an LLM (OpenAI, Hugging Face, or any comparable model you’re comfortable with) into a lightweight API layer. • Deploy that service on a mainstream cloud platform—AWS, Google Cloud, or Azure all work—using best practices for security keys and cost control. • Provide a minimal front-end or Postman collection that shows the summarization endpoint in action. Ideal profile I’d like to collaborate with students in their 1st or 2nd year of Computer Engineering or AI/ML who want real-world exposure to cloud pipelines and prompt engine...

    $3 / hr Average bid
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    43 bids

    I need a small, fast-moving team that already knows the Frappe Framework, ERPNext and FastAPI. We are starting with a clean install, so you will handle both the initial system setup and the development of two fully-featured custom modules: • Inventory Management • CRM The workflow will follow standard Frappe app conventions and must plug into ERPNext’s permission, reporting and workflow engines exactly as the core modules do. All APIs exposed to front-end or third-party tools should be built with FastAPI and documented with Swagger / OpenAPI. Key expectations • Spin up the ERPNext environment (v14 or newer) and version-control everything in Git • Design DocTypes, scripts, print formats and reports for each module • Build REST endpoints with FastAPI...

    $14 / hr Average bid
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    86 bids

    We are looking for an experienced Senior Software Engineer to join our team. **Requirements:** * 5+ years of professional software development experience. * Strong experience with **.NET (C#)** or **Java**. * Experience building and maintaining backend applications, APIs, and databases. * Familiarity with cloud platforms such as AWS, Azure, or GCP. * Strong understanding of software design principles and best practices. * Ability to work independently and deliver high-quality code. * Excellent problem-solving skills. * **Native American English speaker required** with exceptional verbal and written communication skills. * Comfortable participating in client meetings, technical discussions, and cross-functional collaboration in English. **Responsibilities:** * Develop, maintain, and imp...

    $33 / hr Average bid
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    240 bids

    Title: Full-Stack E-commerce Website & Integrated ERP/Billing System for Craft & Cinema Merchandise Brand We are looking for an experienced full-stack developer or agency to build a premium e-commerce platform for our brand featuring handmade Indian crafts, handloom products, and cinema-inspired merchandise. Key Requirements - Responsive e-commerce website (mobile-first) with a user-friendly admin panel. - Built-in inventory, billing, and order management system (no separate billing software required). - Open API architecture to enable seamless real-time integration with our website, mobile app, payment gateways, and Shiprocket. - Product catalog with categories, variants (size, color, framed/unframed, personalization), inventory tracking, coupons, guest checkout, and secure pay...

    $73 Average bid
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    74 bids

    We're looking for a developer or team to help us acquire and customise an existing WhatsApp-style chat application to match our specific requirements — rather than building entirely from scratch. Preferred approach: We're open to purchasing an existing app/source code (e.g., from marketplaces like CodeCanyon) that already covers most core chat/calling functionality, and having a developer customise it to add our specific requirements below. If no suitable existing solution can be adapted, we're also open to a fully custom build — please indicate which approach you'd recommend and why. What we need, either way: 1.⁠ ⁠Desktop & Mobile Connection Users start their computer, open the mobile app, and scan a QR/barcode to connect the desktop app — simila...

    $793 Average bid
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    263 bids

    The project centres on a cross-platform application that runs smoothly on both mobile devices and desktop computers. Every time the respective exchange opens, the app must: • Scan the top 100 equities in the Indian, Japanese, European, American and Singaporean markets, flagging any share that hits a new 52-week low. • Check for fresh block or large deals in those same markets the moment they are reported. • Send an immediate push notification summarising the event (ticker, price, volume, time stamp). A clean dashboard—nothing fancy, just fast—should list the latest signals with basic filtering and an option to export to CSV so I can move data into Excel or Power BI later. Acceptance criteria 1. Mobile (iOS & Android) and desktop (Windows/macOS) insta...

    $79 Average bid
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    40 bids

    I need an end-to-end Android game built around a simple 2-D block-matching puzzle, yet driven by a very specific wallet and reward logic. Core game loop • The player taps a “+” button, watches a rewarded-video ad (AdMob or similar) and receives Coins in the first wallet. • Coins are spent to enter a round; every round also earns the player Tickets that move to the second wallet. • Once a predefined pool of, say, five players has completed that same round, the server instantly ranks their scores without forcing anybody to sit in a live lobby. Rewards are pushed to the third wallet (Winnings). • From the Winnings wallet the user can initiate a cash-out; no deposits are ever accepted, so no payment gateway for top-ups is required—only a withdrawa...

    $867 Average bid
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    61 bids

    I need an English-speaking voice AI that can step in as a quality-assurance assistant during live or recorded calls. Its two core duties are: • Verifying the accuracy of caller data and any details captured in our CRM. • Conversing naturally with customers about general inquiries to keep interactions smooth while it checks that information is logged correctly. The agent should detect discrepancies on the fly, request clarification when something doesn’t match our records, and flag any mismatched fields for review. Real-time transcription, intent recognition, and a brief post-call summary of corrections will help my team close the loop quickly. Deploy to our cloud contact-centre stack via API; Twilio experience is a plus but not required as long as WebSocket or REST hook...

    $318 Average bid
    $318 Avg Bid
    118 bids

    I need a straightforward Android application that lets every member of our credit society log in securely and view their personal information—much like a mini-banking app but limited to our own data set. Each evening I will upload an updated Excel sheet; once that file is imported, the new figures must appear in the relevant member’s screen. Core data to show after login: account balance, full transaction history, current membership status, individual deposit details, and loan transactions. No other modules are required for this first release. Because I will handle the data feed myself, the admin side only needs a simple interface where I can select and upload the latest Excel file; the system can overwrite yesterday’s entries and refresh the app immediately after the...

    $138 Average bid
    $138 Avg Bid
    43 bids

    * Java Spring Boot Developer * Spring Boot API Integration * Java REST API Developer * Java Microservices Developer * Java Backend Developer * Spring Security JWT Developer * Java API Integration Expert * Java Encryption AES RSA Developer * Java OAuth API Developer * Spring Boot PostgreSQL Developer

    $10 / hr Average bid
    $10 / hr Avg Bid
    50 bids

    We are seeking an elite Senior Full-Stack Developer or a highly capable Development Team/Agency to take ownership of, maintain, and execute a massive expansion (Phase 3) of an established, production-grade consumer platform. The core infrastructure and initial surfaces are completely live. Phase 3 represents a major green-field extension, introducing an entire vendor/merchant ecosystem, complex new database domains, transactional/financial capabilities, and advanced security layers. The codebase is clean, well-architected, and strictly follows multi-environment development pipelines. ### Tech Stack & Current System Surfaces All surfaces share a single centralized backend API and a unified backend-as-a-service database instance. #### 1. Mobile Application (Flutter/Dart) * **Architectur...

    $642 Average bid
    $642 Avg Bid
    120 bids

    I need a complete solution that lets people walk up to a public device, place a video or voice call, and pay for the time they use—much like a payphone, but for modern smartphones. Here’s the workflow I have in mind: a caller at the public phone initiates a video or voice call, the recipient answers on an app installed on their own phone, and the call time is deducted from the caller’s prepaid balance. To make this work, I require three tightly-integrated components. • Dual-platform calling apps – One app pre-installed on the public phones for callers – A companion app for recipients on both iOS and Android – Core features: high-quality video and voice calling, automatic time/balance tracking, and clear prompts when credit runs low ...

    $2060 Average bid
    $2060 Avg Bid
    171 bids

    I need a developer to make two targeted functionality changes on my existing site: • Add a secure user login / signup flow (email & password, hashed storage, session handling, simple “forgot password” link). • Remove—or cleanly disable—a specific navigation link so it no longer appears or functions anywhere on the site, without breaking internal routing. Everything else on the site should stay exactly as it is. The codebase is already live, so please work in a branch or staging copy and provide a brief note on the changes you make. Once I review and test that both items work smoothly, I’ll merge to production.

    $23 / hr Average bid
    $23 / hr Avg Bid
    320 bids

    I’m building a web-based platform that lets consumers type in their own income, debt, and credit details and instantly see side-by-side loan offers drawn from two channels—credit unions and online lenders. The core of the project is the comparison engine: once a user submits the short form, our system should securely relay the data to each participating lender’s endpoint (most will supply REST/JSON feeds), collect the responses, normalise the terms, and present a clean comparison table highlighting rate, APR, fees, and total cost. Key components I want delivered • Responsive front end where borrowers manually enter the required fields and can save progress. • Middleware that maps those fields to each lender’s specific request format, handles authentic...

    $159 Average bid
    $159 Avg Bid
    204 bids

    Raising Funds For/ We need a website built around this registered name, RaisingFundsFor, that helps non-profits to raise funds by selling one of our tee shirts. The following provisions should be included: 1) Place to upload and display the current shirt style that the non-profit chose from our library. 2) Admin area for the main domain name of RaisingFundsFor that allows us to create a library of shirt styles, and collects and stores all data by the participants name, and allows us to send mass emails to everyone in the combined database, and accumulates orders that each participant generates. 3) An order form that includes: Charity’s name (RaisingFundsFor/St Patrick High School) Consumer’s name that is on the credit card, street address, City, ST, & Zip code, phone numb...

    $446 Average bid
    $446 Avg Bid
    311 bids

    Looking for an Experienced Full-Stack Development Company We are looking for a professional software development company to design and develop a complete Travel ERP, CRM, B2B & B2C Booking Platform for Al Nabawi Umrah & Hajj Services Pvt. Ltd. Project Requirements Corporate Website B2C Customer Portal B2B Agent Portal Admin Panel Employee Portal Supplier Portal CRM & Lead Management Visa Management System Umrah & Hajj Management Hotel Booking System Flight Booking System Tour Package Management Payment Gateway Integration WhatsApp, SMS & Email Integration API Integration (Flights, Hotels, Visa, Payment) Multi-Company & Multi-Branch Support Multi-Currency & Multi-Language Android & iOS Mobile Apps (Flutter Preferred) Reports & Analyti...

    $294 Average bid
    $294 Avg Bid
    107 bids

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