FastAPI Jobs

Deploy Existing Mobile App to Google Play Store + Connect Admin Panel & Hosting (NO new development) IMPORTANT: The mobile app and admin panel are ALREADY FULLY BUILT. Do NOT bid to redesign or rebuild anything. This job is ONLY deployment, publishing, and linking. Project details and app name will be shared with the selected freelancer after NDA. WHAT EXISTS ALREADY: - A complete two-role mobile app built with Expo / React Native (Expo SDK 54), backend FastAPI (Python) + MongoDB Atlas, currently hosted on an AI app-building platform - A separate web admin panel project (same stack) sharing the same MongoDB database - Google Play Console developer account (approved), app created, store listing in progress - Domain purchased on GoDaddy SCOPE OF WORK (deployment only): 1. GOOGLE PLAY ...

AI-Powered Chatbot Using LangGraph Developed an intelligent AI chatbot capable of handling natural language conversations and providing context-aware responses in real time. The chatbot leverages advanced Large Language Models (LLMs) and LangGraph workflows to manage multi-step interactions, maintain conversation context, and deliver accurate answers to user queries. The system features a responsive web interface, a high-performance FastAPI backend, and a scalable architecture designed for seamless deployment. The chatbot can be adapted for customer support, knowledge management, virtual assistants, FAQ automation, and business process automation. Key Features: • Real-time conversational AI with context retention • Intelligent query processing and response generation • Mu...

I’m assembling a real-time dashboard solution that must run smoothly on both web browsers and mobile devices. The front end will be built with modern HTML, CSS and vanilla JavaScript where appropriate, but React will drive the component logic and state management. On the back end I already have a FastAPI service in place; your task is to consume those endpoints, handle authentication with Firebase, and persist light local data through SQLite when the connection drops. The application needs to feel product-ready from day one: fast initial load, fluid charts that update live as new data streams in, and a UI that scales cleanly as we add new metrics. Efficiency and long-term maintainability matter more to me than quick hacks, so clear component structure and thoughtful API integratio...

Title: Build AI-Powered Dermatology Clinical Decision Support Demo Website (LLM Integration) Description I am a medical doctor developing a proof-of-concept (demo) AI-powered dermatology clinical decision support system for an innovation competition. I have already completed: System architecture Dermatology knowledge base Clinical workflow Decision logic I need an experienced developer to build a demo web application. This is NOT a production healthcare application. Required Features Responsive web application Patient demographic input (Age, Gender) Chief complaint input AI integration (OpenAI GPT-4.1 / GPT-5 or Google Gemini) AI should use my custom dermatology knowledge base Sequential workflow: History Taking Physical Examination Investigation Recommendation Users should not be able to...

I’m building a fully-featured, AI-assisted crypto trading and back-testing application that runs flawlessly on both desktop and mobile screens. The stack is set: a FastAPI (Python) backend for speed, a React front end for a crisp user experience, and an embedded TradingView widget to power the charting. Here is what I expect when the job is complete: • A dark-themed, mobile-responsive interface that loads BTCUSDT, ETHUSDT, SOLUSDT and any custom symbol I enter. • The EMA 20/50 crossover strategy pre-wired, with RSI, MACD and Volume overlays and clear Buy/Sell signals plotted directly on the chart. • Risk/Reward and Position Size calculators that sit alongside the chart so a user can size trades instantly. • One-click AI screenshots of the current analysis ...

I need a seasoned developer to extend an existing AI chatbot platform. The back end is built with Python, FastAPI, FastMCP, and Firestore. The front end is built with Angular. The main focus is strengthening the MCP-based integration layer so the chatbot can securely connect to internal tools, external services, structured data sources, and reusable workflows. You will help extend the existing FastAPI back end, build and refine FastMCP tool/server flows, connect them cleanly into the chatbot workflow, and update the Angular front end where needed to support the new capabilities. Key requirements: - Python and FastAPI - FastMCP / MCP-based tool integration - Firestore - Angular front-end development - REST API design - Authentication, environment configuration, and secure API handling - ...

I need a Retrieval-Augmented Generation chatbot that can instantly answer employees’ questions about our internal HR policy documents. The bot must handle both text and voice input/output so users can type or speak their queries and receive the appropriate response in English. The first release will live inside our existing mobile app, so everything—from authentication to UI widgets—has to be optimized for iOS and Android deployment. A lightweight in-app webview is fine for the chat surface as long as it feels native and supports microphone access. Here’s what I expect: • End-to-end pipeline that chunks, embeds, and indexes my policy PDFs, Word files, and the occasional slide deck, then serves grounded answers using a modern LLM. • Clear separation b...

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, draw size, bonus ball...

Lead Engineer — Computer Vision & LLM Systems London (hybrid/in-office preferred) | Full-time** ## The company We are an AI-powered property intelligence platform. We turn a Rightmove or Zoopla listing into a full development appraisal — GDV, build costs, planning probability, extendable envelope — derived directly from floor plan geometry and plot data. Our browser extension and AI assistant, Otto, put this in front of UK estate agents at the point of instruction; a consumer-facing product is in build. We are mid-pilot with Glue Dog, a major UK independent estate agent network. If you need process, roadmap certainty, or a large team around you before you can ship, this isn't the role. ## The role You will own two things end to end: the computer vision pipeli...

I need a production-ready backend that covers three core pillars: user authentication and management, robust database handling, and versatile API connectivity. The data layer must run on PostgreSQL, so your solution should take advantage of its relational strengths, indexing, and security features. Authentication should support registration, secure login (JWT or similar), password recovery, and role-based access. The system must scale easily as new user types are added. On the integration side, I will connect to both internal endpoints and external third-party services, plus at least one payment gateway. Clean REST (or GraphQL if you prefer) documentation is essential so the mobile team can consume endpoints without friction. While I am open to frameworks—, NestJS, Django, FastAPI...

We are looking for an experienced AI Specialist / Full-Stack Developer who can help us fix, improve, and complete our current AI system. The goal is to build a reliable, scalable AI product with strong backend architecture, model capabilities, and a modern web experience. You will work on understanding the existing system, identifying technical issues, improving performance, and helping us move the product toward a production-ready solution. Responsibilities - Review and debug the current AI system and improve its overall functionality - Design and implement AI workflows, model pipelines, and data processing systems - Develop and optimize AI training and fine-tuning processes - Build and maintain backend services and APIs using Python - Develop modern web applications and integrate AI c...

# 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...

Summary We’re building the orchestration layer for a new AI platform that transforms voice and text into intelligent action. This is not a chatbot. This is not a traditional backend. We’re looking for a systems engineer who enjoys designing elegant architectures and leveraging AI to accelerate development. The Brain Gateway sits between a mobile app and an AI reasoning engine. It receives user input, structures it, sends it to the Brain for reasoning, then executes the Brain’s decisions through a growing set of capabilities such as memory, tasks, scheduling, communication, and future integrations. Our philosophy is simple: * Existing software provides the capabilities. * AI provides the reasoning. * The Brain Gateway provides the orchestration. Your responsibility ...

Senior AI SaaS Platform Architect / Lead Backend Developer Project details:- We are building an enterprise-grade AI SaaS platform for Lyrics, Music, Voice, and AI Video generation. * Multi-Tenant Architecture * White-label Platform * AI Gateway * Control Plane * AI Plane * Organizations * Credits & Wallet * Developer Platform * Provider Adapter Architecture * Feature-Based Subscription Engine * Credits & Wallet System /Billing * SDK Platform * Developer Platform * Enterprise API Platform * AI Job Queue * GPU Workers * SDK * Storage * Analytics * Notifications * Admin Portal * User Dashboard * Admin Dashboard * API/Partner Portal * Super Admin Panel # What You Will Build The platform includes: * AI Gateway * Lyrics Engine * Music Engine * Voice Engine * Video Engine * Prov...

Project Overview I am looking for an experienced Full Stack Development team or individual to build a complete on-demand service platform similar to Urban Company, but customized according to my requirements. The project includes: PA User Mobile Application (Android & iOS) PA Worker Mobile Application (Android & iOS) Admin Web Panel Backend APIs Database Deployment & Documentation This is a complete development project. I need professional quality work with clean architecture, scalable code, and proper documentation. Technology Preference Flutter (Cross Platform) FastAPI / Django REST API / Node.js (Any professional backend) PostgreSQL / MySQL Firebase (Authentication, Notifications) Google Maps API Cloud Deployment (AWS / DigitalOcean / VPS) Developers may suggest better...

We are building a production-grade, multi-tenant SaaS platform for environmental project monitoring, reporting and verification. The platform serves organisations generating verified environmental credits across multiple project types — blue carbon, clean cooking, biochar, renewable energy storage, agriculture and biodiversity — and connects programmatically to international carbon credit registries. We have a completed 100-page technical specification covering every database table, API endpoint, screen, build step and security requirement. You are executing a fully documented brief, not designing architecture from scratch. What you will build: PostgreSQL 15 + PostGIS — spatial data is central to everything on this platform Multi-tenant white-label architecture — br...

We are building our project AI-native Music SaaS Platform. The platform allows users to generate high-quality songs using AI, including lyrics generation, music composition, audio processing, and future AI video generation. Our architecture is based on + FastAPI + Supabase + Open Source AI Models (AudioCraft, ACE-Step, ComfyUI, Qwen)**. We are not building AI models from scratch—we integrate and customize leading open-source AI projects using our own AI Gateway, SDK, and orchestration layer. Our goal is to build a scalable, enterprise-grade AI platform where users can create music, developers can extend the platform through plugins, and businesses can integrate via APIs. At the moment, we are looking for experienced developers to help build different modules of the platform. Y...

I want to build an n8n workflow that takes every incoming WhatsApp message, routes it through an LLM layer (OpenAI GPT-5 or Claude orchestrated with LangGraph / CrewAI and following MCP standards), enriches the prompt with Retrieval-Augmented Generation against our internal data, then sends an intelligent automated reply back through the WhatsApp Business API. The immediate milestone is the WhatsApp piece, but the architecture must stay flexible so I can later plug in Google Workspace and CRM data sources without rewriting the flow. I already run Python + FastAPI services, so any custom code you create should expose endpoints that slot straight into that stack. Key deliverables • Ready-to-run n8n workflow: trigger on WhatsApp, call LLM + RAG service, return response • Lig...

AI Full-Stack Developer Needed – Build a Global AI SaaS Platform for Businesses I am looking for an experienced AI Full-Stack Developer (or a small development team) to build an innovative AI-powered SaaS platform designed for businesses and professionals. This is not a one-time project. My goal is to build a scalable global AI platform offering multiple AI-powered business services. The first module will focus on financial reporting and annual financial statement preparation for companies and accountants. Project Overview The first version of the platform should be able to: * Import accounting data from Excel, CSV, PDF files, and accounting software. * Analyze financial and accounting data using Artificial Intelligence. * Automatically generate annual financial statements. * Ge...

Project Details Overview We are building an MVP for a security operations management system for a security agency. The system digitises core operational workflows including guard deployment, attendance tracking, incident reporting, and patrol verification using NFC checkpoints. This is a real operational system used in physical security environments, not a simple CRUD application. We are looking for a strong full-stack developer or small engineering team with experience in system architecture, backend design, and scalable application development. IMPORTANT CONTEXT This is an MVP that will later evolve into a larger platform. As such, we require: clean system architecture modular backend design API-first approach scalable database structure separation of concerns The MVP itself is ...

API o Servicio para Generación de Guía Aérea Electrónica (e-AWB) conforme a IATA Descripción del Proyecto Se requiere desarrollar un API o servicio en Python para incorporar a una aplicación web existente, cuyo objetivo será la generación de Guías Aéreas Electrónicas (e-AWB) conforme a los estándares definidos por IATA. La aplicación ya dispone de un módulo operativo para embarques aéreos y actualmente genera la Air Waybill (AWB) en formato PDF, utilizando el formulario estándar IATA e incluyendo la mayoría de los campos obligatorios requeridos para la emisión. El objetivo del proyecto es desarrollar el componente que permita transformar dicha información ...