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 20,556 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 20,556 opiniones, los clientes califican nuestro FastAPI Developers 4.9 de un total de 5 estrellas.
Contratar a FastAPI Developers

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    26 trabajos encontrados

    I need a seasoned backend developer to design and implement a secure REST API that lets my users check award-seat availability (Avios) directly from Iberia.com. The core of the job is to automate the full search flow — login, query, filter, and return the results — while keeping the service fast and reliable. Authentication & security The service must issue and validate JWT tokens for every request beyond the public health-check route. Token refresh, revocation, and a simple role model (“user” vs. “admin”) should be built in from the start. Flight data extraction I do not have official Iberia developer access, so we will need to pull the data ourselves. I’m open to whichever tooling you are most comfortable with — BeautifulSoup, Sel...

    €121 Average bid
    €121 Oferta promedio
    54 ofertas
    Iberia Avios Flight API Backend
    6 días left
    Verificado

    I need a seasoned backend developer to design and implement a secure REST API that lets my users check award-seat availability (Avios) directly from Iberia.com. The core of the job is to automate the full search flow — login, query, filter, and return the results — while keeping the service fast and reliable. Authentication & security The service must issue and validate JWT tokens for every request beyond the public health-check route. Token refresh, revocation, and a simple role model (“user” vs. “admin”) should be built in from the start. Flight data extraction I do not have official Iberia developer access, so we will need to pull the data ourselves. I’m open to whichever tooling you are most comfortable with — BeautifulSoup, Sel...

    €121 Average bid
    €121 Oferta promedio
    77 ofertas

    Seeking an experienced full-stack/ML developer to build a secure, cloud-based web platform for analyzing anonymized dental X-rays. The tool enables upload of DICOM files, automatic anonymization (strip all metadata/identifiers), AI-driven detection & annotation of pathologies (caries, periodontal disease, bone loss, cysts, etc.), visual overlays, confidence scores, and report generation—all with strict patient privacy, no storage of originals, and human oversight required. Key Requirements: • Clean React/ frontend with drag-and-drop upload, DICOM viewer (e.g., ), annotation overlays & heatmaps. • Python backend (FastAPI preferred) + secure auth, encrypted file handling, and cloud storage (AWS S3/GCP). • PyTorch/TensorFlow ML models (fine-tune YOLO/U-Net/M...

    €336 Average bid
    €336 Oferta promedio
    205 ofertas

    Project Overview Demo of project we would like to use as example provided below. We are seeking an experienced developer to build a low-latency, real-time stock screener using the QuoteMedia API. The screener will monitor all actively traded U.S. stocks and display key metrics with updates occurring every second. The ideal candidate should have prior experience building financial data tools, stock scanners, or trading platforms and be comfortable working with high-frequency data updates. Core Requirements Data Source QuoteMedia API will be used as the primary data provider. The system must pull and maintain a live list of all U.S. equities. Required Metrics For each stock, the screener must calculate and display: Current price Volume Relative volume (daily) Relative volume (5-m...

    €441 Average bid
    €441 Oferta promedio
    173 ofertas

    Your bid MUST include answers to the 5 questions at the bottom of this posting or it will be immediately rejected. We're a UK-based eSIM and mobile network company launching a branded international calling service. We need an experienced developer to fork, rebrand, and customise the WebTrit Phone open-source softphone app and get it published to both app stores. IMPORTANT: Read this entire posting carefully. There are specific questions at the bottom you MUST answer. Generic proposals will be rejected immediately. What is WebTrit? WebTrit Phone is a Flutter/Dart softphone app that uses WebRTC for voice and video calling. It connects to SIP-based VoIP systems via a REST API. The full source code is available on GitHub. What We Need Done Phase 1 — Fork & Rebrand Fork the Web...

    €426 Average bid
    €426 Oferta promedio
    93 ofertas

    Looking for DevOps Engineer to Set Up Production Environment for SaaS Application Note: I prefer someone who speaks Arabic for easier communication. Description: I have a working SaaS application built with: • Backend: FastAPI • Frontend: (React) • Database: (PostgreSQL ) The application is already functional, and I have real clients. Now I need an experienced DevOps engineer to prepare a proper production-ready infrastructure. Scope of Work: I need help with: 1. Setting up Production Environment (secure & scalable) 2. Creating Staging / Testing environment 3. Implementing CI/CD pipeline 4. Server deployment (Docker preferred) 5. Security best practices (SSL, firewall, access control, secrets management) 6. Logging & Monitoring setup (error tracking, ser...

    €162 Average bid
    €162 Oferta promedio
    64 ofertas

    PROJECT TITLE: AI Receptionist Web Platform (Voice, Chat, Admin AI, Billing, GCP) PROJECT DESCRIPTION: We are looking for an experienced full-stack developer or a small professional team to build a secure, cloud-based AI receptionist web platform. The platform will be used by organisations such as: - schools and colleges - garages and automotive service centres - dentists and clinics - councils and public-sector organisations - other service-based businesses The AI receptionist will handle voice and text conversations, collect information, store and analyse data, and assist administrators through an AI-powered admin panel. This is a serious SaaS project. It is NOT a basic chatbot or a simple HTML website. --- SYSTEM OVERVIEW: The system will: - run on Google Cloud Platform (GCP) - us...

    €236 Average bid
    €236 Oferta promedio
    99 ofertas

    Dashboard Blu X is a professional financial dashboard for options traders tracking real-time gamma exposure (GEX) in SPX options using ThetaData. I have a complete financial dashboard (2,000+ lines of production code) that needs deployment. Development is fully finished and tested locally. I need a deployment/DevOps specialist to handle setup, integration, and take the system live for an initial pilot of two users. WHAT WE HAVE - Complete React 18 + TypeScript frontend (28 files, 1,037 lines) - Complete FastAPI backend (11 files, 673 lines) - All 6 dashboard features fully implemented - WebSocket real-time updates working - All calculations and formulas complete - Complete documentation (README + deployment guide) - Docker configurations ready - Vercel + Railway configs prepared - Envir...

    €19 / hr Average bid
    €19 / hr Oferta promedio
    168 ofertas

    Senior Full-Stack Engineer (Python/FastAPI + React) – Secure Platform MVP Overview I am looking for a senior full-stack engineer to build a secure, authentication-heavy web platform MVP. The project involves: - User authentication & verification - Role-based access control - Relationship-based data modeling - Private content access - Secure cloud deployment Product details will be shared after NDA and shortlisting. Required Tech Stack (Mandatory) Backend Python + FastAPI PostgreSQL (relational modeling) Redis (caching, rate limiting, OTP/session handling) JWT authentication (access + refresh tokens) Async/background task processing (Celery or equivalent) Frontend React + TypeScript preferred Tailwind CSS or similar utility-first styling Infrastructure AWS (Light...

    €99 Average bid
    €99 Oferta promedio
    33 ofertas

    I need a complete, student-facing web application that lets users prove the authenticity of their academic certificates through blockchain hashing. The flow is straightforward: a student signs up, uploads a certificate, and immediately receives an on-chain validation record that anyone can later cross-check online. I have half work done and pages are created Core functionality • Secure user registration and login with email or social auth • Certificate upload, automatic hashing, and immutably storing the hash on a blockchain network (Ethereum or any suitable L2 you recommend) • Instant on-screen validation result plus a shareable verification link • Admin dashboard where I can review submissions, view analytics, and revoke or re-issue hashes when needed Tech...

    €1087 Average bid
    €1087 Oferta promedio
    25 ofertas

    I am looking for a full-stack developer to build a Web Compliance Audit platform. The goal is to create a solution that scans websites for GDPR, Privacy, and Cookie compliance using AI (OpenAI API) and generates professional audit reports. The front-end will be WordPress (for user management, payments, and UI), while the "brain" will be a Python-based engine running on a Linux VPS. Key Features & Requirements: 1. WordPress Frontend: Landing Page: Professional UI where users can enter a URL for a "Quick Scan." User Dashboard: Where clients can see their scan history and download PDF reports. Payment Integration: WooCommerce or Paid Member Subscriptions (Stripe/PayPal) for one-time reports or monthly monitoring plans. API Integration: A custom function to send the U...

    €444 Average bid
    €444 Oferta promedio
    157 ofertas

    I’m building a general-purpose web application with a strong focus on clean front-end interactions and a reliable back-end architecture. The technology stack is intentionally simple and practical: TypeScript on the client side and Python on the server side. I handle product direction and overall architecture, and I’m looking for a Russian-speaking freelance developer who can work as a true full-stack partner. The work spans the entire stack—one day refining a React component, the next implementing a FastAPI endpoint, and occasionally helping shape core backend workflows. What I’m looking for Strong experience with TypeScript and modern front-end frameworks such as React, , or similar, along with current tooling and best practices. Solid Python skills and hands-o...

    €19 / hr Average bid
    €19 / hr Oferta promedio
    191 ofertas
    API-First Trust System MVP
    2 días left
    Verificado

    I need a backend engineer to turn my spec into an MVP that exposes a clean, API-first trust and reputation service for autonomous AI agents. The entire product lives server-side—no front-end work at all—so every feature must be reachable through intuitive, well-documented endpoints. Core requirements • Stack: your choice of FastAPI (Python) or Node (TypeScript), backed by Postgres, containerised with Docker, and wired to Stripe for billing events. • Auth: simple, robust API Key flow; keys must be generated, stored, and validated on every request. • Scoring logic: compute each agent’s trust score solely from its interaction history, according to the formulas in the spec. Performance metrics or direct user feedback are outside this first iteration. ...

    €220 Average bid
    €220 Oferta promedio
    171 ofertas

    I need a skilled full-stack developer to create a web-based minimum-viable product that helps users manage their personal finances. The goal is to ship a usable, secure, and cleanly coded MVP that can later be expanded into a full platform. Scope • Build a responsive web application focused on personal finance management. • Implement standard sign-up/login with secure authentication. • Design a clear, intuitive dashboard that loads quickly on desktop and mobile browsers. • Establish a well-structured backend (REST or GraphQL) and a modern frontend framework—whichever stack you work fastest and most confidently with. • Use a relational or document database (PostgreSQL, MySQL, MongoDB, etc.) and write concise, well-documented queries. • Follow b...

    €28 / hr Average bid
    €28 / hr Oferta promedio
    117 ofertas

    I need a coder who already feels at home working with large-language-model frameworks to build a text-generation program that will power customer-service chatbot replies. The goal is straightforward: feed the bot a user query and receive a clear, helpful response that sounds natural, stays on-brand, and can be deployed inside our existing support interface. Core needs • Model handling: Need to use offline LLMs, preferably llama 3/opus and gemma as long as latency and accuracy stay competitive. • Prompt/response logic: craft the prompt pipeline so it captures context (conversation history, customer metadata) and returns concise answers without hallucinating policies or numbers. • Safety & tone controls: integrate guardrails for profanity, personally identifiable in...

    €19 / hr Average bid
    €19 / hr Oferta promedio
    193 ofertas

    Documento do Sistema – Plataforma de Automação SaaS Este documento descreve os requisitos funcionais e técnicos para o desenvolvimento de uma plataforma de automação utilizada para prestação de serviços mensais gerenciados, com integrações ao Instagram, WhatsApp e uso de Inteligência Artificial. 1. Visão Geral Desenvolvimento de uma plataforma web para automação de atendimento. O administrador cria e mantém fluxos automáticos para seus clientes. O sistema será usado inicialmente como plataforma interna de prestação de serviços, com possibilidade de evolução futura para SaaS self-service. 2. Estrutura SaaS (Multiempresa) Sistema multi...

    €622 Average bid
    €622 Oferta promedio
    34 ofertas
    DigitalOcean MVP + MySQL Import
    1 día left
    Verificado

    I need a developer to quickly deploy an MVP on a DigitalOcean droplet. I already have: Tailwind HTML UI (prototype ready) MySQL database backup that needs to be imported I need help with: Importing the MySQL database to the droplet Minimal server configuration Connecting the UI to the database through a lightweight backend API (FastAPI preferred, Node acceptable) Basic deployment setup so core features run end-to-end Goal: Fast working MVP — simple, clean setup — single droplet — no overengineering Please include: Relevant deployment experience Estimated turnaround time Rate or fixed price

    €73 Average bid
    €73 Oferta promedio
    23 ofertas

    Senior Full-Stack Developer (Python / React / AWS) Overview We are looking for a Senior Full-Stack Developer to design, build, and scale modern web applications. You’ll work across the stack—from backend APIs and cloud infrastructure to frontend experiences—while also contributing to AI-powered features using agents, AWS Bedrock, and Retrieval -Augmented Generation (RAG). Responsibilities - Design, develop, and maintain scalable backend services using Python and FastAPI - Build and optimize frontend applications using React - Architect and deploy applications on AWS - Integrate payment systems such as Stripe - Build and maintain user management systems including SSO - Design and integrate AI-driven features including agents, AWS Bedrock, and RAG pipelines Required Qualif...

    €13 / hr Average bid
    €13 / hr Oferta promedio
    170 ofertas

    I’m planning a lightweight proof-of-concept for “Comeup,” a tool that helps people pinpoint the skills they should develop by applying the ikigai framework. For this first milestone I only need a functional prototype, not a polished app. Scope • A simple web interface (desktop-friendly) where a user enters their passions, strengths, market needs, and core values. • An underlying algorithm or ruleset that cross-references those inputs with an open skills taxonomy and returns a short, ranked list of recommended skills. • Clear, well-commented code and a brief README so I can extend the project later. Tech Any modern stack is fine—feel free to propose JavaScript (React or vanilla), Python (Flask/FastAPI), or another lightweight option you prefe...

    €15 / hr Average bid
    €15 / hr Oferta promedio
    68 ofertas

    I’m planning a lightweight proof-of-concept for “Comeup,” a tool that helps people pinpoint the skills they should develop by applying the ikigai framework. For this first milestone I only need a functional prototype, not a polished app. Scope • A simple web interface (desktop-friendly) where a user enters their passions, strengths, market needs, and core values. • An underlying algorithm or ruleset that cross-references those inputs with an open skills taxonomy and returns a short, ranked list of recommended skills. • Clear, well-commented code and a brief README so I can extend the project later. Tech Any modern stack is fine—feel free to propose JavaScript (React or vanilla), Python (Flask/FastAPI), or another lightweight option you prefe...

    €14 / hr Average bid
    €14 / hr Oferta promedio
    56 ofertas

    I’m planning a lightweight proof-of-concept for “Comeup,” a tool that helps people pinpoint the skills they should develop by applying the ikigai framework. For this first milestone I only need a functional prototype, not a polished app. Scope • A simple web interface (desktop-friendly) where a user enters their passions, strengths, market needs, and core values. • An underlying algorithm or ruleset that cross-references those inputs with an open skills taxonomy and returns a short, ranked list of recommended skills. • Clear, well-commented code and a brief README so I can extend the project later. Tech Any modern stack is fine—feel free to propose JavaScript (React or vanilla), Python (Flask/FastAPI), or another lightweight option you prefe...

    €19 / hr Average bid
    €19 / hr Oferta promedio
    67 ofertas

    I need a complete, student-facing web application that lets users prove the authenticity of their academic certificates through blockchain hashing. The flow is straightforward: a student signs up, uploads a certificate, and immediately receives an on-chain validation record that anyone can later cross-check online. I have half work done and pages are created Core functionality • Secure user registration and login with email or social auth • Certificate upload, automatic hashing, and immutably storing the hash on a blockchain network (Ethereum or any suitable L2 you recommend) • Instant on-screen validation result plus a shareable verification link • Admin dashboard where I can review submissions, view analytics, and revoke or re-issue hashes when needed Tech...

    €76 Average bid
    €76 Oferta promedio
    39 ofertas
    Fix Python Data Delay & Redesign
    1 día left
    Verificado

    My Python-based STOCK TRADING AGO web application is suffering from a real-time data issue: background processing runs, but the results reach the client side with a noticeable lag. I need you to trace that bottleneck, bring the pipeline back to true real-time behaviour, and then give the interface a fresh look while you’re in the codebase. Current stack • Python 3.10 with FastAPI • Celery + Redis for background jobs • PostgreSQL 13 • Front-end in plain HTML/CSS with a sprinkling of vanilla JS What I expect from you 1. Diagnose why background tasks aren’t pushing updates instantly—whether it’s queue configuration, database locking, or cache timing—and implement a clean, well-documented fix. 2. Refactor or rewrite any britt...

    €25 Average bid
    €25 Oferta promedio
    20 ofertas

    AssessQ – AI-Powered Technical Assessment Platform Role: Full Stack Developer Developed AI-powered hiring platform with automated interview generation and resume parsing Implemented real-time proctoring system with violation detection and session monitoring Built adaptive multi-session interview engine with dynamic question generation Designed real-time admin dashboard using WebSockets Implemented JWT-based authentication and role-based access control Developed analytics module with PDF reporting Optimized performance using lazy loading and API caching Tech Stack: React 18, TypeScript, FastAPI, WebSockets, JWT, PostgreSQL, AI APIs PRIDE – AI-Powered Content Studio Role: Frontend / Full Stack Developer Designed dynamic template management and real-time PDF preview system Develo...

    €9 / hr Average bid
    €9 / hr Oferta promedio
    37 ofertas

    Fraud Detection Platform - Extraction Accuracy & Expansion Project Title **Senior Python Developer Needed for Document Fraud Detection Platform (Ongoing)** --- Project Description I have an 80% complete document fraud detection platform (Fraud X) built with: - **Backend**: Python, FastAPI, PostgreSQL, asyncpg - **Frontend**: React - **Infrastructure**: DigitalOcean VPS, Nginx, Gunicorn/Uvicorn, HTTPS - **OCR**: Multi-provider (Google Document AI, AWS Textract, GPT Vision fallback) Current Status The core system is working: - File upload & scan lifecycle - Multi-provider OCR with scoring - Fraud engine with PASS/CAUTION/FAIL verdicts - Admin dashboard with evidence viewer - JWT authentication & role-based access What Needs to Be Fixed (Phase 1 - Immediate) **1. Paystub E...

    €419 Average bid
    €419 Oferta promedio
    105 ofertas

    I’m planning a lightweight proof-of-concept for “Comeup,” a tool that helps people pinpoint the skills they should develop by applying the ikigai framework. For this first milestone I only need a functional prototype, not a polished app. Scope • A simple web interface (desktop-friendly) where a user enters their passions, strengths, market needs, and core values. • An underlying algorithm or ruleset that cross-references those inputs with an open skills taxonomy and returns a short, ranked list of recommended skills. • Clear, well-commented code and a brief README so I can extend the project later. Tech Any modern stack is fine—feel free to propose JavaScript (React or vanilla), Python (Flask/FastAPI), or another lightweight option you prefe...

    €922 Average bid
    €922 Oferta promedio
    126 ofertas

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