The ultimate guide to hiring a web developer in 2021
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
JSON stands for JavaScript Object Notation and it is a data-interchange format that is used for storing and exchanging information. It is more lightweight than the traditional XML format and is even used to send data across the internet from a web server. JSON developers are experts in understanding the syntax of this technology, but also in designing and coding up solutions for a wide range of problems for clients. JSON developers have an essential role in developing a variety of applications such as databases, websites and server-side applications.
Here's some projects that our expert JSON Developers made real:
Overall, hiring a skilled JSON developer can enable businesses to harness the power of a wide range of web solutions — from report automation scripts, eCommerce shopping rules to flight search result interfaces — that be customised for any application or platform. With the help of Freelancer Platform, clients can find experienced and reliable professionals that have collaborated with businesses globally. With access to experts in the field, businesses can rest assured that their projects are being handled by specialized professionals that are well versed with this technology. We invite you to post your project on Freelancer Platform so you can find the most suitable professional for your needs.
From 134,951 reviews, clients rate our JSON Developers 4.9 out of 5 stars.JSON stands for JavaScript Object Notation and it is a data-interchange format that is used for storing and exchanging information. It is more lightweight than the traditional XML format and is even used to send data across the internet from a web server. JSON developers are experts in understanding the syntax of this technology, but also in designing and coding up solutions for a wide range of problems for clients. JSON developers have an essential role in developing a variety of applications such as databases, websites and server-side applications.
Here's some projects that our expert JSON Developers made real:
Overall, hiring a skilled JSON developer can enable businesses to harness the power of a wide range of web solutions — from report automation scripts, eCommerce shopping rules to flight search result interfaces — that be customised for any application or platform. With the help of Freelancer Platform, clients can find experienced and reliable professionals that have collaborated with businesses globally. With access to experts in the field, businesses can rest assured that their projects are being handled by specialized professionals that are well versed with this technology. We invite you to post your project on Freelancer Platform so you can find the most suitable professional for your needs.
From 134,951 reviews, clients rate our JSON Developers 4.9 out of 5 stars.I need two print formats inside ERPNext—one for Purchase Orders and one for Sales Invoices—fully customised to match a design I already have. Every section matters: the header, each line-item table, and the footer all require layout changes, adjusted field positions, and a few extra calculated columns that aren’t in the default print formats. You will work directly in the Print Format builder or, if you prefer, through custom Jinja/HTML so long as the final result plugs straight into ERPNext without breaking on future version updates. CSS must be inline or embedded per ERPNext’s best practice, and the output must render correctly in PDF and on-screen. Deliverables • Purchase Order print format (.json or .html) reflecting my mock-up • Sales Invoic...
I need a compact, Linux-friendly suite of command-line utilities written in C or C++ that lets me run deep diagnostics on the following components: • RAM Memory • CPU • HDD & SSD (including low-level write/partition and speed tests) • RF-UNIT support where applicable The tools must be completely CLI-driven so they can slot into existing bash automation. For each utility I also need concise professional usage notes—syntax examples, expected output, and any kernel-module or package prerequisites—so a technician can get productive within minutes. Additional scope items: – Benchmark and stress-test options to reveal peak throughput and thermal throttling on RAM and CPU. – Sequential and random read/write tests on block devices, with sm...
I have an ESP32 DevKit V1 (CP2102) already wired to a PZEM-004T V3, an ADS1115 16-bit ADC, one SCT-013-010 CT sensor, and three DS18B20 waterproof probes. With this hardware I need working firmware and a simple cloud-hosted dashboard that can: • Detect and log the compressor state (ON/OFF). • Detect, log, and quantify both the indoor fan status(ON/OFF) as well as fan current or speed. • Read room, inlet, and outlet temperatures. • Calculate hourly power consumption (kWh) and total run-time for the compressor and each fan. • Push every reading over Wi-Fi using pure HTTP requests formatted as JSON. On the front end I want a live web dashboard that combines graphs with raw tables so I can flip between trends and exact values. The visuals should update in n...
I’m building a lightweight Android-only app whose single purpose is to generate random lottery numbers. The interface needs to stay simple and minimalistic—plain backgrounds, clean type, just one or two buttons—so users can open the app and get their numbers instantly. Here’s what matters: • Core feature: a lottery number generator only. No ticket-purchasing or results-checking at this stage. • Platform: native Android, targeting at least Android 8.0. Kotlin or Java is fine. • Look and feel: strictly minimal, using basic Material Components without flashy graphics. • Randomness: please rely on SecureRandom (or an equally strong method) rather than () for genuine unpredictability. • Configurability: all game rules (number range, dra...
My Facebook Messenger flows are already running smoothly inside ManyChat, but the moment I push a contact over to the data stalls. Tags tied to each lead-magnet download never arrive because the text data inside the payload is not being formatted the way Make expects. I need an expert who has hands-on experience moving text fields between ManyChat and Make (formerly Integromat), setting up custom JSON, and mapping variables so Facebook user details move across reliably. On a live video call I want to: • Walk you through my current scenario, showing where the data stops flowing • Re-configure the webhook / HTTP module so text parameters come through clean and are usable in Make filters • Confirm the tag logic works by sending a test lead from each magnet and watching ...
# API / Data Integration Engineer Required – Horse Racing Analytics Platform We are looking for an experienced API and data integration engineer to support an existing horse racing analytics platform. The backend is already built using **Python, FastAPI, PostgreSQL, and SQLAlchemy**. The system currently supports CSV/XLSX/HTML imports, race card imports, trackwork imports, medical reports, declarations, results, and post-race audits. The current requirement is to integrate structured racing data sources into the existing backend and improve the data ingestion pipeline. ## Scope of Work * Integrate external racing data APIs or structured feeds if available. * Connect data sources such as JSON, XML, CSV, Excel, HTML, or FTP/SFTP feeds. * Build clean API clients for supported provi...
HI, I need SharePoint / M365 SME to teach following items. Need help in quick ramp up of new features. Need resource who is actively working on some or all of the list items. We can do 2 hour interactive session on week days. SharePoint Course Requirement --------------------------- 1- packaging and deployment of custom webparts, list, page, site template 2- programming json for formatting columns, views, list forms 3- Data Loss Prevention (DLP) 4- SharePoint Advanced Management (SAM) - content assessment 5- Data Access Governance (DAG) reports to identify and remediate oversharing and permission risks 6- CI/CD pipeline for deployment 7- SharePoint Framework (SPFx) - few practical use case scenarios for coding and deployment 8- PnP tools and provisioning frameworks for standardize de...
I need a developer who can build a polished Roku TV application that streams multiple live sports and event channels. The core experience is straightforward: a viewer launches the app, signs in, lands on an intuitive channel guide, and immediately starts watching uninterrupted, high-quality live feeds. Key features I must have • User login & authentication – token-based, with secure storage of credentials. • Channel guide – a familiar EPG grid that pulls programme data from my JSON/REST endpoint and updates in real time. • In-app advertisements – mid-roll and pre-roll using Roku Advertising Framework, with dynamic ad stitching (VAST / VMAP). Technical expectations BrightScript / SceneGraph are required, and I expect HLS streams with adaptive...
I need my existing Google Sheet to double as a live barcode scanner that talks directly to our Flipkart VMS. When a package’s barcode is scanned—either with a phone camera or a handheld scanner—the sheet should instantly fetch and record the correct Product ID from Flipkart so I can track every item the moment it hits the packing table. The flow I’m picturing is simple: 1. Cursor lands in the “Scan” cell. 2. Barcode is read. 3. Apps Script (or an add-on you build) calls Flipkart VMS, grabs the matching Product ID, and drops it in the designated column—no extra clicks. All logic, API calls, and error handling have to sit neatly inside the sheet so the packing crew keeps working in one tab. I also need a short set-up guide so I can duplicat...
I need my existing Google Sheet to double as a live barcode scanner that talks directly to our Flipkart VMS. When a package’s barcode is scanned—either with a phone camera or a handheld scanner—the sheet should instantly fetch and record the correct Product ID from Flipkart so I can track every item the moment it hits the packing table. The flow I’m picturing is simple: 1. Cursor lands in the “Scan” cell. 2. Barcode is read. 3. Apps Script (or an add-on you build) calls Flipkart VMS, grabs the matching Product ID, and drops it in the designated column—no extra clicks. All logic, API calls, and error handling have to sit neatly inside the sheet so the packing crew keeps working in one tab. I also need a short set-up guide so I can duplicat...
I need two simple yet reliable prototype nodes that can sit outdoors, wake up at a configurable interval, pull a register line from a Modbus-compatible soil probe, and push that reading through a Meshtastic link. No commercial polish required—the goal is to prove the data path end-to-end. Scope of work • Recommend and source—or at least specify—a compact board, radio module, and battery pack (AA-powered) suited for outdoor use. I currently have no hardware on hand, so component guidance is essential. • Write Python-based firmware (preferred language) that: – Powers the Modbus interface, retrieves the probe value, and sleeps between cycles to conserve the batteries. – Publishes the reading over Meshtastic in a lightweight JSON or CSV payl...
I need an expert to redesign the command and control interface for a swarm of drones. The focus is on user experience design, and I'm open to suggestions on specific areas to improve. Ideal Skills and Experience: - Experience in UX/UI design, particularly for complex systems - Strong portfolio showcasing similar projects - Ability to gather user feedback and iterate on designs - Knowledge of drone operation is a plus
I’m looking for a Python script that polls Polymarket and Kalshi every 30–60 seconds, pulls every open market, and flags genuine cross-platform arbitrage opportunities. A “good match” is the exact same bet even if the wording is different, so the matching logic must go beyond simple string equality—tokenisation, Jaccard similarity or any technique you prefer is fine as long as it reliably pairs bets that are 100 % the same event. For each confirmed overlap the script has to compile and push a JSON payload to my existing API containing: • full market questions / titles, • current Yes/No prices on both sites, • volume and liquidity metrics, • the calculated arbitrage margin in %, • category, close date and any other valuable m...
Fresh server Project (tickets System)_Testing(teaching) I try to find epert person who can know fresh work as well( special ticket system) Requiment as follow: 0. one more year experence 1. you can create fresh work for trying it (16 days) 2. Ticket Testing for everything to fix problem(software, virsus,hardware,and so on) 3. know api(postman) 4. workfolw ( from frsh work system) 5. you need to know how using any desk tools or remote tools 6. Custom field
I’m enhancing an existing PHP application and now need an experienced developer to wire in several third-party services. The core of the job is to analyse each provider’s endpoint requirements, extend or refactor the current codebase where necessary, and make sure the new integrations run smoothly alongside what is already in production. You will be working with modern PHP (object-oriented, namespaced) on a LAMP stack, so familiarity with RESTful requests, webhooks, JSON handling, and robust error logging is essential. Security is a must—token management, input sanitisation, and graceful failure states all have to be considered from the outset. I’ll give you access to the repository, environment details and any documentation the vendors supply. Your work should pl...
Automatización de Integraciones y Ejecución vía Telegram en n8n Objetivo del Proyecto: Crear un sistema automatizado en n8n que analice documentación de APIs de terceros mediante IA, genere la estructura de conexión y permita a los clientes ejecutar, autenticar y monitorear el envío de datos (ej. tramas telemáticas o posiciones) directamente a través de un bot de Telegram. Fase 1: Análisis y Estructuración (Setup de la Integración) 1. Procesamiento de Documentación La IA recibe la documentación técnica de la plataforma de destino. Extrae requerimientos de autenticación (Tokens, API Keys) y endpoints. Genera la lista de credenciales que se deben solicitar al cliente/proveedor. 2. Da...
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
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