20 of 20 Permanent FastAPI Jobs in the Thames Valley

uncertainty environments Excellent communication and collaboration skills Demonstrated curiosity and drive to learn through experimentation Preferred: Familiarity with tech stack: Next.js, React, TypeScript, Python, FastAPI, Postgres, Redis Experience with cloud infrastructure (AWS, GCP) Exposure to or experience with foundation models or Generative AI (LLMs, RAG, fine-tuning, agents, evals ...

Build Across the Stack Develop high-performance, user-facing features using React, Next.js, and TypeScript Design and build backend services and APIs using Python (FastAPI) Design Robust Systems Architect clean, scalable REST APIs Design and optimise PostgreSQL/Supabase schemas for performance and growth Ship to the Cloud Deploy, maintain ...

This is not a maintenance role. It is system ownership. What We're Looking For 7+ years commercial software engineering experience Deep Python expertise (FastAPI/Flask/Django) Strong system design and architecture capability Experience with cloud-native environments and Kubernetes Microservices and CI/CD exposure Proven experience ...

arrangements in place. Technical Requirements Backend & APIs Strong experience designing REST and/or GraphQL APIs for production SaaS platforms Advanced proficiency in Python (FastAPI) and/or Node.js (TypeScript/NestJS) Deep understanding of multi-tenant system design, permissions, and role-based workflows Event-driven architectures using webhooks, queues ...

arrangements in place. Technical Requirements Backend & APIs Strong experience designing REST and/or GraphQL APIs for production SaaS platforms Advanced proficiency in Python (FastAPI) and/or Node.js (TypeScript/NestJS) Deep understanding of multi-tenant system design, permissions, and role-based workflows Event-driven architectures using webhooks, queues ...

arrangements in place. Technical Requirements Backend & APIs Strong experience designing REST and/or GraphQL APIs for production SaaS platforms Advanced proficiency in Python (FastAPI) and/or Node.js (TypeScript/NestJS) Deep understanding of multi-tenant system design, permissions, and role-based workflows Event-driven architectures using webhooks, queues ...

About Persistent: We are an AI-led, platform-driven Digital Engineering and Enterprise Modernization partner, combining deep technical expertise and industry experience to help our clients anticipate what's next. Our offerings and proven solutions ...

product teams Strong ownership mindset and ability to execute independently Based in London and happy working hybrid Tech Stack: Frontend: React, Next.js Backend: Python, FastAPI Data & Infra: SQL, GCP CI/CD, testing, and code review as standard engineering practice Interview Process Introductory conversation Technical discussion/assessment Final interview ...

Quant Dev or Systematic Trading environment at a top fund or bank. Coding Mastery: Expert proficiency in Python (Polars/Dask/FastAPI) and/or C++. AI Native: Proven ability to use LLMs and Machine Learning to solve complex financial time-series problems. Industry Standard Experience: You have worked ...

Job Title: AI/ML Engineer – Data Science Location: United Kingdom (Remote/Hybrid) Eligibility: Permanent UK Citizenship required Experience: 5–7 years (Mandatory in Data Science/AI-ML) Role Overview We are seeking ...

Senior Software Engineer | London | £100,000 - £160,000 | Python | FastAPI | AWS Location: London based - hybrid Salary: £100,000 - £160,000 + equity Tech Stack: Backend: Python (experience with FastAPI or Django or Flask beneficial) Cursor, Claude Code AWS - experience with Azure & GCP beneficial Are you a backend engineer who cares … complex problems, and be part of an exceptional team, get in touch at imogen@sr2rec.co.uk. Senior Software Engineer | London | £100,000 - £160,000 | Python | FastAPI ...

High trust, high ownership: Make decisions that move the whole company forward. We value autonomy, speed, and impact. Stack: Build with modern tools — Python, FastAPI, TypeScript, LLMs, MLOps What We're Looking For 2+ years of software development experience Proven track record of building and shipping full-stack products … working in a fast-moving, high-ambiguity startup You're looking for a large team with established roadmaps and guardrails Tech Stack Core: Python, FastAPI, TypeScript, React AI/ML: OpenAI, Anthropic, computer use, evals, voice agents Infrastructure: Azure, Docker Process: Initial Screen (30 min video call with ...

architecture across the portfolio. Essential Requirements 3-6+ years building production-grade full-stack applications, with clear ownership. Strong backend experience in Python (FastAPI preferred) and solid database skills (PostgreSQL/MongoDB). Proven experience building and shipping mobile apps with React Native. Strong React fundamentals (Next.js experience … 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. Frontend: React/Next.js Mobile: React Native Datastores: PostgreSQL, MongoDB (as appropriate), Redis (caching/sessions). Vectors/Embeddings: Chroma (or similar). ...

Senior Full Stack Engineer (AI) | London | £100k to £150k | React | Django | FastAPI Location: London Salary: £100,000-£150,000 + benefits This role is for Engineers who are intellectual and driven by deep complexity. This is about building tools that help people make sense of exceptionally complex systems. You will … competent as they are ambitious. What you will be doing Building and evolving full stack applications used by technical teams, using Django, FastAPI & React Creating interfaces that help users understand complex behaviour and data Working closely with others to shape how tools should work and feel Balancing speed, quality ...

product features used by enterprise customers. Develop modern, responsive interfaces using React/Next.js. Design and optimize APIs, data pipelines, and integrations using Python (FastAPI/Django). Collaborate with design, product, and AI teams to deliver new functionality quickly and reliably. Contribute to architectural decisions, system scalability, and engineering … Looking For: Proven experience as a Full-Stack Engineer in a startup or fast-paced environment. Strong proficiency in React/Next.js and Python (FastAPI/Django). Experience shipping scalable, production-grade software. Exposure to or interest in AI/ML-driven products. Startup experience or comfort with high ...

Senior Backend Engineer – High-Scale Systems | Python & FastAPI | Security SaaS Salary: £75k - £85k plus bonus Location: Fully remote, (UK-based) Sponsorship is not available for this role Prism Digital have partnered with a super interesting and niche VC-backed client specialising in attack surface management and automated red teaming. Their … messaging queues e.g., Kafka (nice to have) This is entirely a Python back-end development role (Python 3), where the core framework used is FastAPI and Kafka for the messaging queues. The data sits in PostreSQL and MongoDB. Benefits Up to £85,000 Fully remote 28-day holidays (including bank ...

understand the trade-offs between speed, cost, and model performance. Design, implement, and productionise multi-agent LLM systems that reason, plan, and coordinate. Develop FastAPI-based microservices optimised for low latency and high reliability. Engineer and evaluate RAG pipelines: hybrid retrieval, re-ranking, grounding, and context validation. Integrate real-time … model-faithfulness metrics. What we're looking for Proven ability to build and ship agentic or multi-agent frameworks into production. Expert Python, FastAPI, and asyncio developer. Practical experience with LangChain, Autogen, or custom orchestration layers. Startup mindset: ownership, speed, and pragmatism over perfection. Bonus points Experience working with voice ...

understand the trade-offs between speed, cost, and model performance. Design, implement, and productionise multi-agent LLM systems that reason, plan, and coordinate. Develop FastAPI-based microservices optimised for low latency and high reliability. Engineer and evaluate RAG pipelines: hybrid retrieval, re-ranking, grounding, and context validation. Integrate real-time … model-faithfulness metrics. What we're looking for Proven ability to build and ship agentic or multi-agent frameworks into production. Expert Python, FastAPI, and asyncio developer. Practical experience with LangChain, Autogen, or custom orchestration layers. Startup mindset: ownership, speed, and pragmatism over perfection. Bonus points Experience working with voice ...

understand the trade-offs between speed, cost, and model performance. Design, implement, and productionise multi-agent LLM systems that reason, plan, and coordinate. Develop FastAPI-based microservices optimised for low latency and high reliability. Engineer and evaluate RAG pipelines: hybrid retrieval, re-ranking, grounding, and context validation. Integrate real-time … model-faithfulness metrics. What we're looking for Proven ability to build and ship agentic or multi-agent frameworks into production. Expert Python, FastAPI, and asyncio developer. Practical experience with LangChain, Autogen, or custom orchestration layers. Startup mindset: ownership, speed, and pragmatism over perfection. Bonus points Experience working with voice ...

specified. You'll ship features end-to-end: from problem framing through to production. The stack is Next.js/React on the front, FastAPI/Python on the back, PostgreSQL/Supabase for data, deployed on Vercel/AWS. Day-to-day looks like: Designing and building core platform features … shipped products, not just features. You can point to something real. You're strong across the stack but especially deep in Python/FastAPI and React/Next.js. You've worked with LLMs in production - prompt engineering, evals, handling non-determinism. Not just tutorials. You have taste. You care about ...