1 to 25 of 271 Permanent FastAPI Jobs in England

Sr. Technical Lead / Architect

Location
Greater London, England, United Kingdom
professional experience in software engineering and technology, across relevant technical roles and responsibilities; Solid experience with Python and backend development using frameworks such as FastAPI, Flask, or Django; Experience designing and developing RESTful APIs; Good understanding of front-end development with React JS, JavaScript (ES6+), and TypeScript; intermediate knowledge ...

Senior Fullstack Engineer (Python + React.js)

Location
Greater London, England, United Kingdom
with a strong focus on building scalable, high-performance systems. Technical Skills: Python expertise, with hands‐on experience building backend services and APIs using FastAPI, Flask or similar. Experience in designing and developing end-to-end (E2E) tests to ensure smooth integration between backend and frontend components. A solid understanding ...

Senior Python Developer - AI

Hiring Organisation
83zero Limited
Location
London, United Kingdom
Employment Type
Permanent
Salary
£70,000
through to robust, production-ready applications for enterprise clients. What you'll be doing: Build production applications and APIs using Python and FastAPI Develop LLM, RAG and AI agent solutions Build RAG pipelines covering embeddings, retrieval and generation Work with OpenAI, Anthropic, Mistral, Llama and similar LLMs Use LangChain, LangGraph ...

Senior Python Developer - AI

Hiring Organisation
83zero Limited
Location
Manchester, North West, United Kingdom
Employment Type
Permanent
Salary
£70,000
through to robust, production-ready applications for enterprise clients. What you'll be doing: Build production applications and APIs using Python and FastAPI Develop LLM, RAG and AI agent solutions Build RAG pipelines covering embeddings, retrieval and generation Work with OpenAI, Anthropic, Mistral, Llama and similar LLMs Use LangChain, LangGraph ...

AI Transformation Developer

Location
Greater London, England, United Kingdom
Python development experience, with 2+ years of AI/ML development Strong proficiency in Python and experience with frameworks such as Django, Flask, or FastAPI Experience with API development, integration, and web services in production environments Hands‐on experience integrating AI or ML models, LLM APIs, or automation frameworks into ...

GenAI Full Stack Engineer - Consultant / Senior Consultant - Digital Excellence

Location
Manchester, England, United Kingdom
Security Check) Clearance or be eligible for such level of clearance.## **Technical Expertise*** **Backend Development**: Experience in building microservices using either Python with **FastAPI**, or TypeScript with **Express** or equivalent* **Frontend Development**: Experience in building React applications using TypeScript, leveraging frameworks such as **Next.js** or **Vite**.* **GenAI Frameworks**: Familiarity ...

GenAI Full Stack Engineer - Consultant / Senior Consultant - Digital Excellence

Location
Greater London, England, United Kingdom
Security Check) Clearance or be eligible for such level of clearance.## **Technical Expertise*** **Backend Development**: Experience in building microservices using either Python with **FastAPI**, or TypeScript with **Express** or equivalent* **Frontend Development**: Experience in building React applications using TypeScript, leveraging frameworks such as **Next.js** or **Vite**.* **GenAI Frameworks**: Familiarity ...

Python Developer - AI

Hiring Organisation
83zero Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£55,000
through to robust, production-ready applications for enterprise clients. What you'll be doing: Build production applications and APIs using Python and FastAPI Develop LLM, RAG and AI agent solutions Build RAG pipelines covering embeddings, retrieval and generation Work with OpenAI, Anthropic, Mistral, Llama and similar LLMs Use LangChain, LangGraph ...

Python Developer - AI

Hiring Organisation
83zero Limited
Location
Manchester, North West, United Kingdom
Employment Type
Permanent
Salary
£55,000
through to robust, production-ready applications for enterprise clients. What you'll be doing: Build production applications and APIs using Python and FastAPI Develop LLM, RAG and AI agent solutions Build RAG pipelines covering embeddings, retrieval and generation Work with OpenAI, Anthropic, Mistral, Llama and similar LLMs Use LangChain, LangGraph ...

Software Engineer – Python/AWS/Terraform (SC or DV Cleared)

Location
Greater London, England, United Kingdom
Lambda ECS or EKS API Gateway SNS and SQS EventBridge IAM CloudWatch Serverless and event-driven architectures Desirable experience Stronger Python backend development using FastAPI or Flask. Kubernetes or Amazon EKS. DevSecOps and secure-by-design engineering. Observability, monitoring and automated alerting. < REST APIs and distributed systems. Ansible, CloudFormation ...

Senior Software Developer, Team Lead

Location
Dudley, England, United Kingdom
security) Strong experience with modern frontend frameworks (React, Vue, Angular, or equivalent) Strong experience with backend frameworks and API development (e.g., Node.js/Express, FastAPI/Django/Flask, ASP.NET, Spring Boot, or similar) Experience with relational and NoSQL databases (e.g., PostgreSQL, SQL Server, DynamoDB, MongoDB, Cosmos) including data modeling ...

Senior Software Engineer, Python/Typescript

Location
Cambridge, England, United Kingdom
proven full stack engineering experience with production web applications and backend services Strong skills and programming experience in Python Experience developing web applications using FastAPI, Flask, or Django Experience with frontend development in TypeScript/JavaScript, Next.js, React, and MUI frameworks Familiarity with PostgreSQL, Redis, and REST API design ...

GenAI Fullstack Engineer

Location
West of England, England, United Kingdom
Security Check) Clearance or be eligible to obtain and maintain this level of clearance. Technical ExpertiseBackend Development Experience building microservices using Python with FastAPI, TypeScript with Express, or equivalent technologies. Frontend Development Experience developing React applications using TypeScript. Familiarity with frameworks such as Next.js, Vite, or similar. Generative AI Technologies ...

GenAI Fullstack Engineer

Hiring Organisation
Sanderson Government and Defence
Location
Bristol, Avon, South West, United Kingdom
Employment Type
Permanent
Salary
£70,000
Security Check) Clearance or be eligible to obtain and maintain this level of clearance. Technical Expertise Backend Development Experience building microservices using Python with FastAPI, TypeScript with Express, or equivalent technologies. Frontend Development Experience developing React applications using TypeScript. Familiarity with frameworks such as Next.js, Vite, or similar. Generative ...

Senior AI Consultant - Agentic AI & Generative AI

Location
Brighton, England, United Kingdom
plus AI product UX patterns such as streaming, review loops, provenance/citations, long-running tasks and error recovery. Back-end: Django (5.x+), DRF, FastAPI, Pydantic, Celery, Django Channels, Flask and RESTful APIs. Databases and storage: PostgreSQL, MS SQL Server, MongoDB, Firestore, BigQuery, Azure Blob Storage. Cloud and DevOps: Azure ...

Agentic / GenAI Consultant / Senior Consultant

Location
Greater London, England, United Kingdom
ShadCN UI, Redux, Zustand, Jest, Cypress.Build AI product UX patterns (streaming, review loops, provenance/citations, long-running tasks, error-recoveryBackend: Django (5.x+), DRF, FastAPI, Pydantic, Celery, Django Channels, Flask, RESTful APIs.Databases & Storage: PostgreSQL, MS SQL Server, MongoDB, Firestore, BigQuery, Azure Blob Storage.Cloud & DevOps: Azure (App Services, OpenAI ...

Principal Cloud Engineer (Terraform), London

Location
Greater London, England, United Kingdom
Lake/Apache Iceberg, and advanced SQL for large‐scale transformations. Microservices & APIs: experience building modular, production‐grade microservices and REST APIs using Python (FastAPI, Flask, or equivalent); understanding of service design principles including versioning, fault tolerance, and observability. Cloud platforms: working knowledge of cost and usage data schemas across ...

Digital Developer

Location
Exeter, England, United Kingdom
delivery. Key Responsibilities: Develop responsive and accessible applications using React, Next.js, and TypeScript. Design and maintain backend services and REST APIs using Python and FastAPI or Flask. Develop application functionality using Elasticsearch and other search or data services. Implement secure authentication and authorisation, including OAuth2 and Microsoft Entra ID integrations. ...

Site Reliability Software Engineer (Hybrid)

Location
Greater London, England, United Kingdom
Services, Azure Functions, virtual machines, storage, networking, and monitoring Docker and Linux-based application hosting SQL Server, PostgreSQL, or SQLite IIS, Nginx, Flask, FastAPI, Django, Node.js, or similar web stacks Secure file transfer, API integrations, and healthcare system interfaces Monitoring, alerting, logging, and incident response platforms We offer an excellent ...

Senior Full-Stack Developer (Bath Area)

Location
Bath, England, United Kingdom
like React Proficiency with writing maintainable Python and Typescript, including experience of working with relevant libraries for data processing and backend API development (i.e., FastAPI, Pydantic, expressJS, NodeJS, NextJS API Router, etc) Good understanding of cloud deployment Strong understanding and proven experience working with browsers and web APIs including HTML ...

Software engineer, generative AI (UK)

Location
Greater London, England, United Kingdom
architecture, RESTful APIs, cloud platforms such as AWS, GCP, or Azure, and containerization with Docker and Kubernetes Solid grasp of modern web technologies including FastAPI, Asyncio, database systems like PostgreSQL, and hands-on experience leveraging AI developer tooling like Claude, Cursor, or GitHub Copilot to accelerate your engineering workflows Exposure ...

Senior Software Engineer (Machine Learning)

Location
West of England, England, United Kingdom
responsibilities within your competence to support our growth. Required Skills & Experience: Significant industry experience in (scientific) software development Proven experience building production APIs with FastAPI (or similar async Python frameworks) Strong working knowledge of modern machine learning — able to understand, integrate, and extend the functionality of an ML library (NumPy ...

Full-stack Engineer London

Location
Greater London, England, United Kingdom
Responsibilities Design, develop, and maintain frontend applications using React and Next.js. Build, test, and deploy backend services and APIs (Python/Django/FastAPI preferred, but other languages/frameworks welcome). Collaborate with founders, growth team, designers, and other engineers to deliver high-impact features. Ensure scalability, performance ...

Senior Software Engineer Python

Hiring Organisation
MarkIT Placements
Location
Didcot, Oxfordshire, South East, United Kingdom
Employment Type
Permanent, Work From Home
environment, this role offers both autonomy and real impact. Requirements Backend Architecture & APIs (Primary Focus) Design and evolve scalable backend services in Python using FastAPI for high-availability, high-throughput workloads. Build well-versioned RESTful APIs aligned to OpenAPI/Swagger, with strong conventions for consistency, idempotency, and backward compatibility. ...

Senior Software Engineer

Hiring Organisation
Hackajob Ltd
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
Design (SbD) frameworks. 2. Full-Stack Engineering (Web & APIs) 4+ years of production experience with modern Web stacks (TypeScript, React, Node.js, or Python/FastAPI). Strong API design experience (REST, GraphQL, gRPC, WebSocket) and relational/non-relational database design (PostgreSQL, SQLite). 3. Systems & Mobile Architecture (Android ...