51 to 59 of 59 FastAPI Jobs in London

Lead Python Engineer | AI, Python, FastAPI, Django, Microservices, APIs, Cloud | London | up to £130k + Equity Build AI-powered systems that automate real-world workflows at scale. This is an opportunity to join a fast-growing AI startup building an AI-driven platform automating up to 80% of property management … helping shape engineering practices and mentoring other developers in a high-growth environment. You'll be responsible for architecting and building Python-based systems (FastAPI, Django, Flask), developing and optimising data pipelines, and ensuring systems are scalable, secure, and performant. You'll collaborate closely with product, AI, and design teams ...

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). ...

Python Developer | Python & FastAPI | Founding Engineer in AI Venture Studio Building Creator-Led Products Salary: 90k + Generous Equity Location: On-Site, London The Role You’ll join an early-stage AI venture studio as a Founding Engineer, working directly with the CTO inside a small, elite team building … founder rather than waiting for direction. Clear communication skills are a must, as well as an ability to operate in ambiguity. Non-Negotiables Python FastAPI – or adjacent Python frameworks API design and backend architecture fundamentals PostgreSQL and/or MongoDB experience Strong React or React Native experience AWS serverless infrastructure ...

pace, you’ll contribute to architectural decisions across services, data models, and how AI is integrated into a production-grade system. Stack: Python, FastAPI, Pydantic, LangGraph, Claude, React, TypeScript, Terraform What you need Strong experience building production Python backend systems Deep knowledge of FastAPI (or similar), async Python, and PostgreSQL ...

you. What you'll do • Model and optimise PostgreSQL/Supabase & graph db/Neo4j schemas for complex data • Design and implement APIs in FastAPI for AI workflows and product features • Build and scale LangGraph-based multi-agent systems with checkpointing, retries, and observability • Integrate vector search, knowledge graphs … users • Experience working in startups (1 year + of total experience) • Experience with LangGraph, RAG pipelines, vector databases, or knowledge graphs • Production experience with FastAPI or a similar modern Python framework • Experience scaling and operating services on GCP, AWS, or Azure • A high-ownership mindset - you care about reliability, correctness ...

migrating the application from, improving the Stripe integration, and implementing core tracking and SEO foundations, and more,. Tech Stack React, TypeScript, Next.js, Python (FastAPI), PostgreSQL, GCP (Cloud Run/SQL), Stripe, Firebase Auth, Terraform. Key Requirements Strong React/TypeScript and Next.js (SSR/SSG) Python/FastAPI backend ...

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 ...

product Experience with Hotwire (Turbo & Stimulus) and Tailwind CSS Familiarity with background job processing (Sidekiq, Delayed Job, etc.) Experience with Python and FastAPI - our data pipeline and some supporting services are built in Python, and you'd be expected to maintain and contribute to these alongside the Rails codebase Familiarity … infrastructure and deployment platforms Experience working in a startup or high-growth environment Our Stack Backend: Ruby on Rails, PostgreSQL, Sidekiq Data & Services: Python, FastAPI Frontend: Hotwire (Turbo Stimulus), Tailwind CSS, Three.js Infrastructure: Render Tooling: GitHub Actions, Sentry About Resi Resi is the UK’s number one home extension company ...

Senior Software Engineer | £70k–£95k | Python • FastAPI • AWS • EKS 🚀 Looking for a product-led engineering role in a recently profitable, high-growth scale-up? This isn't just about maintenance; it’s about building high-scale, cloud-native microservices and tackling a massive upcoming greenfield build. 🛠️ 💰 The Package … week in London 🌍 Perks: Remote working, £1k annual flexible benefit, 30 days "work from abroad" p/a 🛠 Tech Stack: Python, FastAPI, gRPC, GraphQL, AWS (EKS), Microservices The Mission 🎯 This scale-up is transforming the insurance landscape through real-time data and telematics. By leveraging smart technology, they reward safe ...