FastAPI is a modern, open-source, high-performance web framework used to develop a range of different API applications. Developed with a combination of Python and Starlette, the framework is designed to help developers easily create and maintain powerful applications using the latest technologies. With FastAPI, developers can quickly build production-ready APIs that can handle response times as low as a few milliseconds or less. Moreover, FastAPI is especially useful for creating solutions that require complex data processing and includes features such as interactive documentation with fast response time, asynchronous request data validation and easy integration with databases.

A FastAPI Developer is therefore an expert in creating powerful, robust APIs that are capable of meeting the requirements of even the most demanding solutions. With the help of a FastAPI Developer, clients can create fast, reliable applications quickly and easily. The developer makes sure that all aspects related to data processing and validation are taken care of and enables applications to utilize the latest technologies.

Here's some projects that our expert FastAPI Developer made real:

  • Our developer helped clients create secure login systems through Google Authentication
  • We created databases for complex data processing solutions
  • Another client enhanced their existing systems with APIs for mobile apps
  • We changed how customers interacted with websites and digital services through fast response times
  • We helped businesses integrate digital products with custom made APIs using MongoDB and NextJS

Whether you're an individual looking for a personal project or a small team looking for an experienced FastAPI Developer to work on a larger project, Freelancer.com has you covered. With experienced developers from all over the world, you can easily find the perfect match for your project needs. So why wait? Post your project on Freelancer.com today and get one step closer to finding the perfect developer to make your vision come true!

De 28,708 opiniones, los clientes califican nuestro FastAPI Developers 4.9 de un total de 5 estrellas.
Contratar a FastAPI Developers

FastAPI is a modern, open-source, high-performance web framework used to develop a range of different API applications. Developed with a combination of Python and Starlette, the framework is designed to help developers easily create and maintain powerful applications using the latest technologies. With FastAPI, developers can quickly build production-ready APIs that can handle response times as low as a few milliseconds or less. Moreover, FastAPI is especially useful for creating solutions that require complex data processing and includes features such as interactive documentation with fast response time, asynchronous request data validation and easy integration with databases.

A FastAPI Developer is therefore an expert in creating powerful, robust APIs that are capable of meeting the requirements of even the most demanding solutions. With the help of a FastAPI Developer, clients can create fast, reliable applications quickly and easily. The developer makes sure that all aspects related to data processing and validation are taken care of and enables applications to utilize the latest technologies.

Here's some projects that our expert FastAPI Developer made real:

  • Our developer helped clients create secure login systems through Google Authentication
  • We created databases for complex data processing solutions
  • Another client enhanced their existing systems with APIs for mobile apps
  • We changed how customers interacted with websites and digital services through fast response times
  • We helped businesses integrate digital products with custom made APIs using MongoDB and NextJS

Whether you're an individual looking for a personal project or a small team looking for an experienced FastAPI Developer to work on a larger project, Freelancer.com has you covered. With experienced developers from all over the world, you can easily find the perfect match for your project needs. So why wait? Post your project on Freelancer.com today and get one step closer to finding the perfect developer to make your vision come true!

De 28,708 opiniones, los clientes califican nuestro FastAPI Developers 4.9 de un total de 5 estrellas.
Contratar a FastAPI Developers

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    18 trabajos encontrados

    We are looking for a reliable Python backend developer to provide ongoing part-time support for an established production SaaS platform. You will work within an existing backend codebase alongside other developers, completing features, resolving bugs, improving automated tests, and submitting clean, maintainable pull requests. Technology Stack Python FastAPI Pydantic v2 SQLAlchemy PostgreSQL or another relational database REST APIs Git and GitHub Automated Python testing Third-party API integrations Webhooks Responsibilities Develop and maintain FastAPI endpoints Implement backend features based on assigned tickets and acceptance criteria Build reusable filtering, validation, and database-query functionality Write and optimize SQLAlchemy queries Troubleshoot and fix backend bugs Work wi...

    $8 / hr Average bid
    $8 / hr Oferta promedio
    45 ofertas

    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
    $17 / hr Oferta promedio
    195 ofertas

    **Project Title:** Looking for an Experienced Full Stack Developer (React/Node.js/Python) – Long-Term Collaboration **Project Description:** We are **VR Tech Solutions**, a growing software development agency based in India. We are looking for a reliable and experienced Full Stack Developer to work with us on a freelance, project-based basis. This is a long-term collaboration opportunity. We are building a trusted technical team to deliver high-quality software solutions for our clients. **Required Skills:** * React.js / * Node.js or Python (Django/FastAPI) * REST API Development * MySQL / PostgreSQL / MongoDB * Git & GitHub * Deployment (AWS, Azure, DigitalOcean or similar) **Responsibilities:** * Develop responsive web applications * Build scalable backend APIs * Integr...

    $247 Average bid
    $247 Oferta promedio
    100 ofertas
    ERPNext Inventory & CRM Modules
    6 días left
    Verificado

    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...

    $11 / hr Average bid
    $11 / hr Oferta promedio
    73 ofertas

    I have a React web app and want to add a simple AI-powered chat assistant to it. The app is already built and working; this is a focused addition, not a rebuild. What I need: A clean chat interface component in React (message list, input, loading state). Connect it to an AI API (OpenAI or similar) through a lightweight Python backend (FastAPI or Flask). Streaming responses so replies appear as they're generated, not all at once. Basic error handling (timeouts, rate limits) and keeping the API key secure on the backend. Ideal skills: React and JavaScript/TypeScript. Python (FastAPI or Flask) for the backend endpoint. Hands-on experience integrating AI/LLM APIs into real products. Clean, commented code I can maintain later. Nice to have: Experience with streaming responses (SSE/We...

    $20 / hr Average bid
    $20 / hr Oferta promedio
    312 ofertas

    I need a full-stack engineer who can take roughly 200 pages of internal policy and product PDFs and turn them into a smooth retrieval-augmented-generation experience for our team. Your first job will be to ingest those PDFs, chunk them sensibly, and store the embeddings in a vector database—pgvector is my default choice, though I am open to any alternative you can justify. On top of that store you will wire up a RAG flow in LangChain, leaning on its Integration with OpenAI or Claude so answers come back in natural language and include transparent source citations. A lightweight FastAPI backend should expose a single chat endpoint that handles retrieval and generation, while a simple, functional React front end lets users ask questions and see cited answers. No fancy UI polish needed...

    $155 Average bid
    $155 Oferta promedio
    125 ofertas

    AI Video App का नाम (उदाहरण) VisionAI Studio मुख्य फीचर्स 1. AI Script Generator एक लाइन लिखें → पूरी कहानी तैयार हिंदी, अंग्रेज़ी और अन्य भाषाओं का समर्थन Crime, Horror, Motivation, Kids, Facts, History जैसी कैटेगरी 2. AI Image Generator Text से Ultra HD इमेज Character consistency 16:9, 9:16 और 1:1 फॉर्मेट 3. AI Video Generator Text → Video Image → Video Character animation Lip-sync और Facial expressions 4. AI Voice Generator हिंदी, अंग्रेज़ी और कई भाषाएँ Male/Female आवाज़ें Emotion: Happy, Sad, Angry, Dramatic 5. AI Subtitle Generator ऑटो कैप्शन कई फ़ॉन्ट और स्टाइल 6. AI Music बैकग्राउंड म्यूज़िक Cinematic, Horror, Emotional, Action 7. AI Sound Effects Rain Explosion Gunshot Jungle Crowd Wind 8. AI Video Editor Trim Merge Transition Effects Motion Blur Zoom 9. AI Thumbnail...

    $1889 Average bid
    $1889 Oferta promedio
    27 ofertas

    I’m ready to give my homeopathic practice a modern, clean online home and, once it launches, keep it climbing in local search. Here’s what I need: The website • Fully responsive build with Home, About, Treatments, FAQs, Testimonials and a Contact page that includes simple name-email-message fields. • Embedded Google Maps for both clinic locations and a WhatsApp click-to-chat button. • Design must follow my existing colour palette and branding guidelines while keeping the overall look fresh and uncluttered. • Fast load times, accessible code and on-page technical SEO baked in from day one. After launch • One-time SEO foundation: keyword research, meta data, schema, image optimisation, XML sitemap submission and search console set-up. • Monthly ret...

    $216 Average bid
    $216 Oferta promedio
    114 ofertas

    We are Optedif Formation, a French training organization delivering short professional training programs for adults, entrepreneurs, employees, freelancers, job seekers and people in career transition. We are looking for experienced trainers, instructors or subject-matter experts in Frameworks et bibliothèques Python (Python Frameworks) to deliver short training sessions in French. The training may be delivered remotely or on-site depending on the learners’ needs. Scope of Work The selected freelancer will be expected to: * Deliver short training sessions in French * Adapt explanations to adult learners * Share practical and operational knowledge * Use existing training material or help improve it when needed * Create a positive and constructive learning environment * Supp...

    $408 Average bid
    $408 Oferta promedio
    60 ofertas

    The task is to create a complete, server-based file-sharing application from scratch. I want a standalone file server that handles uploads, downloads, permission management, and performance optimisation in a single, well-architected solution. Scope • Design the overall architecture (front-end, back-end, storage layer). • Develop the core file-handling APIs and the web interface. • Implement granular user and group permissions. • Optimise transfer speed, concurrency handling, and storage efficiency. • Containerise and script deployment so the server spins up smoothly on a fresh Linux instance. • Provide concise documentation covering build steps, configuration, and maintenance. Tech stack is flexible: Node.js with Express, or Python with FastAPI, ...

    $78 Average bid
    $78 Oferta promedio
    37 ofertas

    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 ...

    $79 Average bid
    $79 Oferta promedio
    78 ofertas

    Hi, I'm looking for an experienced developer/team to take over and complete my existing project instead of building a new one from scratch. Project Goal The application allows users to upload single or multiple research papers (PDFs), ask AI about any questions based only on those uploaded papers, generate answer for them .if they ask for research reports it must provide report (pdf , docs) and generate PowerPoint presentations(optional). The project is intended for my MCA major project, so the code should be clean, well-structured, and fully functional. Current Technology Stack Frontend - React + Vite - React Router - Axios - React Markdown - React Icons - Custom CSS Backend - Python 3.11 - FastAPI - SQLAlchemy - PyMuPDF (fitz) - bcrypt - Google Gemini API Database Xampp ...

    $35 Average bid
    $35 Oferta promedio
    58 ofertas

    I’m spinning up a new product whose backend will be written in Python—principally Django and a few FastAPI micro-services—while the front-end sits in React. I already have a rough proof-of-concept; what I need now is an experienced full-stack engineer who can tighten the architecture, harden the deployment path, and weave OpenAI into several business workflows. Here’s what I’m asking you to tackle: • Back-end polish: refactor the existing Django project, expose or revise FastAPI endpoints, and keep an eye on clean, test-driven code. • OpenAI hooks: build out the calls, manage prompting, handle streaming responses where useful, and wrap everything with robust error handling & quota management. • DevOps: design and implement an end-to-en...

    $2074 Average bid
    $2074 Oferta promedio
    234 ofertas
    Salon Application
    3 días left

    # Hiring: Experienced Python FastAPI Backend Developer (Long-Term Project) I'm looking for an experienced **Python FastAPI Backend Developer** to collaborate with me on a long-term salon booking platform. The backend should be **scalable, secure, and follow clean architecture with industry best practices**. ## Backend Features * Authentication (OTP, JWT, Role-Based Access) * Customer, Salon Partner & Admin APIs * Salon registration & approval workflow * Salon profile, services, categories & image management * Search, filtering & nearby salon APIs * Booking management (Create, Update, Cancel, Reschedule) * Time slot & availability management * Live, Special & VIP booking support * Payment gateway integration (Razorpay or similar) * Coupons & promotional o...

    $273 Average bid
    $273 Oferta promedio
    127 ofertas
    Cross-Platform AI Sales CRM
    3 días left
    Verificado

    I’m building a next-generation sales CRM that feels as effortless as snapping a business card yet powerful enough to run an entire pipeline. The first milestone is a fully functional iOS, Android and Web application that shares a single code-base and database so every action—scan, score or follow-up—stays perfectly in sync, online or off. Core scope for this phase • AI Business Card Scanner – instant OCR, auto-detect fields, verify emails and phone numbers on the spot. • AI Lead Scoring – classify each new contact as Hot, Warm or Cold based on behavioural and profile signals I can tweak later. • AI-generated Meeting Summaries – turn call notes or voice memos into concise, searchable summaries stored against the contact record. Ar...

    $284 Average bid
    $284 Oferta promedio
    92 ofertas

    (TTT) is a multi broker trading platform — think Bloomberg × TradingView × Robinhood. TTT combines institutional-grade market data, real-time charting, and automated strategy execution in a retail-accessible terminal. The platform executes live orders through a low-latency automated pipeline and is preparing for scaled live user and capital deployment. The Role We are hiring a Full Stack Software Developer to build and harden TTT under the direct technical and product direction of the Principal. This is a production trading system, not a prototype: your code will sit in the path of live orders, real capital, and real-time market data. The stack is locked. We are not looking for architectural opinions or framework migrations — we are looking for a disciplined exe...

    $20 / hr Average bid
    $20 / hr Oferta promedio
    147 ofertas

    **Project Overview: Custom CRM for Electronics Retail & Distribution Business** I need a custom web-based CRM (Customer Relationship Management) system for my electronics retail and distribution business. We deal with both B2B and B2C customers and sell products such as air conditioners, refrigerators, washing machines, televisions, and other electronic appliances. The primary objective of the first version is to ensure that no customer inquiry or follow-up is ever missed. Multiple salespersons should be able to log in, add new inquiries, update existing ones, schedule follow-ups, and track the status of each lead. Managers should have complete visibility into all inquiries and salesperson activities through dashboards and reports. The system should be modular so that additional fea...

    $262 Average bid
    $262 Oferta promedio
    114 ofertas

    AI Avatar Factory – Build an Autonomous 24/7 AI Content Platform (n8n • OpenAI • AI Avatars • PostgreSQL • Railway • GitHub) ABOUT NEVIE-GLOBAL NEVIE-GLOBAL is a French technology company developing an ecosystem around Artificial Intelligence, Enterprise Automation, SaaS, Blockchain, Robotics, IoT, Wearable Technology and Digital Education. We are building a next-generation Autonomous AI Avatar Factory capable of automatically creating, managing and publishing AI-generated content 24 hours a day, 7 days a week with minimal human intervention. This is not a one-time project. We are looking for a reliable long-term technical partner capable of designing, building and continuously improving this platform over a minimum period of three months, with many futur...

    $119 Average bid
    $119 Oferta promedio
    34 ofertas

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