26 to 50 of 51 FastAPI Jobs in the Thames Valley

background from a leading university. Deep experience with modern JavaScript frameworks (React preferred), TypeScript, and data visualisation tools. Proficiency in Python and familiarity with data workflows and backend frameworks (FastAPI/Flask). No sponsorship available – candidates must have the right to work in the UK. More ❯

like Cursor agent mode) into our daily engineering, creating guardrails, and helping others ship high-quality code faster. What you’ll do Own backend features and API integrations (Python, FastAPI, gRPC, SQL). Adapt and extend auto-generated pipelines and front-end outputs. Build connectors for APIs, files, and external systems. Integrate LLM-based capabilities with robust evaluation and monitoring. More ❯

completely new technologies to market - with the experience that defines how we do it. What you will do Design and implement user-facing APIs to support frontend user flows (FastAPI) Build robust user authentication, authorisation, and account management (Auth0) Integrate payment processing and subscription management (Stripe) Design and manage user databases and data models (MongoDB, PostgreSQL) Implement asset storage, retrieval More ❯

optimise Large Language Models (LLMs) for performance, accuracy, and cost efficiency. Build evaluation pipelines to ensure model reliability and stability. Develop secure and scalable Python applications and RESTful APIs (FastAPI, Django REST Framework). Integrate AI services and foundation models from providers such as Azure AI , Amazon Bedrock , and Google Vertex AI . Work with vector databases and retrieval mechanisms More ❯

frontend, and ML teams to deliver features that delight and scale. You should have 5+ years of experience developing production-grade backend systems and APIs. Strong skills in Python (FastAPI or similar) and modern cloud infrastructure. Deep understanding of system design, scalability, and reliability . A product-oriented mindset — you design with end users and UX impact in mind. Passion More ❯

measures, sensors) -> Offline-first/PWA apps for installers on the move Tech Stack: -> React, TypeScript, Konva, Tailwind -> Node.js, PostGREST, Prisma -> PostgreSQL/PostGIS, Docker, Atlas -> (Sunsetting Python + FastAPI) Requirements for Carbon Emission/Green Tech Start-up | Full Stack Engineer | LDN 2 Days Per Week | £50K - £110K + Healthy Equity -> 2+ years commercial experience -> STEM Background -> React + More ❯

embark on their next phase of expansion. You'll be 100% hands-on, with the opportunity to step into a leadership role as the team scales. Tech Stack - Python, FastAPI, AWS, PostgreSQL, NumPy, Pandas What You’ll Be Doing - Designing, building, and maintaining scalable backend systems for AI-driven healthcare solutions. Working closely with the ML engineers to integrate AI More ❯

supply chain, to marketing & sales for domestic markets in the UK, and further abroad internationally. Skills And Experience Required Python experience Be great to have a web framework – Flask, FastAPI, Django, etc Data manipulation with Pandas/numpy SQL Server This role is great for; Python Engineers early in their Career that want access to a great learning culture and More ❯

in project delivery : taking ideas from concept to production under tight timelines. Comfort with ambiguity and speed — this is an early-stage, high-autonomy environment. Tech Snapshot Python 3.11+, FastAPI, SQLAlchemy, Alembic, PostgreSQL AWS (IAM, SES, Bedrock) Event-driven architecture, API-first development AI/ML pipelines integrated into core workflows Why This Role Take over a Lead position and More ❯

world needs, contributing directly to products that redefine how humans and intelligent agents collaborate. Key Responsibilities Design, implement, and maintain scalable back-end systems and RESTful APIs using Python (FastAPI/D) Apply domain-driven design and test-driven development to build microservices using agile methodologies, with a focus on reliability Develop, test, and deploy LLM-based applications in secure … re motivated by the opportunity to build meaningful, production-ready tools at the frontier of LLMs, agentic AI, and enterprise software. Essential: Strong experience with Python and proficiency in FastAPI or Django Proven experience building secure, enterprise-grade, public-facing software in an agile delivery environment Familiarity with SQL and NoSQL databases, including PostgreSQL, Redis, or MongoDB Solid understanding of More ❯

Overview Led by a world-class faculty of scientists, technologists, policy makers, economists and entrepreneurs, the Ellison Institute of Technology aims to develop and deploy commercially sustainable solutions to solve some of humanity's most enduring challenges. Our work is More ❯

Engineer (3+ years’ experience) to take ownership of core backend systems end-to-end, from infrastructure to database design. Ideal Profile: Strong experience with Python and SQL Familiarity with FastAPI , Pydantic , and PostgreSQL Bonus: experience with lower-level languages such as Rust Role Details: Compensation: £80K–£130K + equity (0.1–0.3%) Location: On-site in London, 4/5 days More ❯

Senior Software Engineer/Developer (Python FastAPI Data) London to £90k Are you a data centric Software Engineer with strong Python and SQL skills? You could be progressing your career in a senior, hands-on role at a fast growing, global Insurance Underwriting technology provider that focusses on developing a complex SaaS calculation platform for rapidly growing Cybersecurity insurance markets. … days per year Season ticket loan Employee Assistance Programme Impactful role with great career progression Apply now to find out more about this Senior Software Engineer/Developer (Python FastAPI Data) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people More ❯

Senior Backend Engineer – Python | Django | FastAPI | AWS Build systems that power the future of AI Are you a high-agency backend engineer who thrives on solving complex problems at scale? Do you enjoy designing secure, production-grade systems and shipping robust APIs that make advanced technology accessible? Would you like to shape core infrastructure for AI-powered products in a … from the ground up in a company that genuinely values engineering excellence. Why This Role is Great In this role, you’ll get to: Design scalable backend architecture using FastAPI and Python for high-performance workloads Build and maintain robust APIs following RESTful conventions and OpenAPI/Swagger standards Own the performance of PostgreSQL databases , including partitioning, indexing, and horizontal … recovery About You You might come from a variety of backgrounds, but you’ll thrive in this role if you’re excited to: Work with modern tools like Python, FastAPI, PostgreSQL, Docker, and AWS Engage with real-time systems and AI model integration pipelines Build on your experience of deploying APIs, writing clear documentation, and maintaining strong testing practices Apply More ❯

Senior Backend Engineer – Python | Django | FastAPI | AWS Build systems that power the future of AI Are you a high-agency backend engineer who thrives on solving complex problems at scale? Do you enjoy designing secure, production-grade systems and shipping robust APIs that make advanced technology accessible? Would you like to shape core infrastructure for AI-powered products in a … from the ground up in a company that genuinely values engineering excellence. Why This Role is Great In this role, you’ll get to: Design scalable backend architecture using FastAPI and Python for high-performance workloads Build and maintain robust APIs following RESTful conventions and OpenAPI/Swagger standards Own the performance of PostgreSQL databases , including partitioning, indexing, and horizontal … recovery About You You might come from a variety of backgrounds, but you’ll thrive in this role if you’re excited to: Work with modern tools like Python, FastAPI, PostgreSQL, Docker, and AWS Engage with real-time systems and AI model integration pipelines Build on your experience of deploying APIs, writing clear documentation, and maintaining strong testing practices Apply More ❯

You’ll be part of a collaborative team creating innovative digital products that turn complex datasets into meaningful, actionable insights. Experience required Developing robust backend services using Python (Flask, FastAPI). Building intuitive, responsive dashboards with modern frontend frameworks (React). Ensuring performance, scalability, and accessibility across all devices. Managing deployments using Docker and AWS. Monitoring system performance and maintaining … reliable infrastructure. Collaborating with cross-functional teams to bring new ideas to life. Tech stack Strong experience with Python web frameworks (Flask, FastAPI). Skilled in modern frontend development (React, JavaScript, HTML/CSS). Understanding of responsive design, accessibility, and UX best practices. Experience with Docker, AWS, and CI/CD pipelines. Knowledge of Git, version control, and deployment More ❯

and data infrastructure. You'll work closely with data engineers, AI specialists, and frontend developers to deliver robust, production-quality software. Key Responsibilities: Build and maintain Python web applications (FastAPI preferred) Integrate AI/ML components with backend, data, and compute infrastructure Deliver clean, well-documented code following best practices Implement automated testing frameworks and CI/CD workflows Monitor … and improve performance metrics across deployed tools Collaborate with technical teams to develop end-to-end data pipelines YOUR SKILLS AND EXPERIENCE Essential: Proven Python backend development experience (FastAPI, Flask, or similar) Strong cloud experience (GCP preferred) and understanding of core web app infrastructure Skilled in automated testing (pytest) and modern DevOps tools (Git/GitHub, CI/CD) Experience More ❯

Software Engineer – Python/FastAPI/React/Functional programming/Typescript Location: London, UK (Hybrid) Type: Full-time Level: Mid to Senior Salary: £70,000 to £100,000 About the Role: This startup is building a cutting-edge platform to transform how engineers design physical products. Instead of creating one solution at a time, this system enables users to … about real-world engineering not just building software, but helping change how things are designed and built. Opportunities: Frontend or Backend Tech Stack within the engineering environment: Backend: Python, FastAPI, Pydantic, PostgreSQL, Docker Frontend: React, TypeScript, Vite Infrastructure: GitHub Actions, GCP, Kubernetes (optional) Paradigms: Functional programming, async APIs, event-driven architecture Responsibilities Build and maintain backend services using FastAPI and … in Computer Science, Engineering, Physics, Mathematics, or a related technical field 2+ years of experience building web applications in a production environment Strong experience with Python and API frameworks (FastAPI, Flask, etc.) Proficiency with React and TypeScript Comfort or interest in functional programming principles and clean code architecture A genuine interest in engineering and the physical world Ability to thrive More ❯

/Contract: Contract/FTC (6 months) Is it Onsite/Remote/Hybrid: Hybrid Start Date: Immediate Job Description: Python Developer Principal Accountabilities Develop backend systems using Python, FastAPI, and related frameworks Manage data with SQL Alchemy, working across PostgreSQL, CosmosDB, and Redis Build scalable cloud solutions using Azure PaaS services (App Services, Function Apps, API Management, etc.) Design … Celery Apply TDD principles using PyTest for automated testing Use Terraform for Infrastructure as Code and Docker for containerisation Technical Skills Python Expertise: Strong proficiency in Python, especially with FastAPI, SQL Alchemy, and Celery. Azure PaaS: Hands-on experience with Azure services like App Services, Function Apps, API Management, Service Bus, Storage, Key Vaults, Azure SQL, and Cosmos DB. API More ❯

/vector DB integration, eval hooks, cost/safety guardrails). Essential Requirements 2–4+ years building production backends/services , with shipped work and clear ownership. Strong Python (FastAPI) and database skills ( PostgreSQL/MongoDB ); solid API design fundamentals. Familiarity with AWS serverless patterns and Docker for bespoke services; basic CI/CD concepts. Comfortable with Redis (caching/… orchestration; MCP servers for integrations. Security hygiene (secrets, permissions, least-privilege) and practical data-privacy basics. Planning & execution in Linear (or similar). Tools & Stack Backend/Runtime: Python (FastAPI), Node.js. Datastores: PostgreSQL, MongoDB (as appropriate), Redis (caching/sessions). Vectors/Embeddings: Chroma (or similar). AI Models & APIs: Claude (Anthropic), Gemini (Google); Amazon Nova Canvas (vision), Deepgram More ❯

Full-Stack Engineer – London (Hybrid) Our client is a fast-growing software business delivering market-leading ticketing products to forward-thinking organisations worldwide. Their platform is used by hundreds of thousands of people and powers ticket sales for some of More ❯

Principal Engineer – Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK £160,000 per annum plus stock options Python | Django | FastAPI | AWS | Rust | Postgres | Event-Driven Architecture | Machine Learning Principal Engineer - We're working with a leading fintech scale-up that’s transforming how small businesses access finance. Backed by a strong track … a chat. Principal Engineer – Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK £160,000 per annum plus stock options Python | Django | FastAPI | AWS | Rust | Postgres | Event-Driven Architecture | Machine Learning More ❯

hardware and software designing scalable backend systems that connect thousands of machines, handle massive real-time data flows. What You’ll Do: Design, build, and scale backend systems using FastAPI and modern Python tooling. Architect highly efficient systems to handle thousands of concurrent data streams from connected devices. Develop APIs for edge devices and integrate backend services with their frontend … engineers and scientists to deliver innovative AI solutions for real manufacturing environments. About You: 3+ years of experience building and deploying backend systems at scale. Strong proficiency in Python, FastAPI, Postgres, and SQLAlchemy. Familiar with distributed systems, cloud deployments, and tools like Redis, Celery, Sentry, and New Relic. Experience leading projects end-to-end in fast-paced environments A strong More ❯

Python Developers | London | £100,000 – £170,000 + Equity You'll be joining a team that are making it easier for large industries to bring AI into production. The tech focuses on scaling, reliability, and making AI systems practical. The More ❯

Backend Engineer – London (Hybrid) Our client is a fast-growing software business delivering market-leading ticketing products to forward-thinking organisations worldwide. Their platform is used by hundreds of thousands of people and powers ticket sales for some of the More ❯