176 to 190 of 190 FastAPI Jobs in the UK

tech environment. Location: Remote (UK) Contract: 6 Month (OIR35, likely extension) Rate: £300-350 p/day Start: ASAP Key Skills: Experience with Python and modern frameworks such as FastAPI or Flask . Understanding of SQLModel/SQLAlchemy and relational database design. Knowledge of PostgreSQL and query optimisation. Extensive exposure to Celery Familiarity with AWS and CI/CD pipelines. … Interest in data platforms, analytics, or cloud-native architecture (Bonus) Experience in data-heavy systems or B2B SaaS Key Responsibilities: Design, develop, and maintain backend services using Python and FastAPI to power a data and intelligence platform Build and optimise database models with SQLModel and SQLAlchemy. Integrate with PostgreSQL databases and external APIs. Contribute to feature development, testing, and deployment. 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 ❯

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 ❯

Applied AI Software Engineer - Python, Fast API, AWS, LLMs OB are partnered with a high-growth, B2B SaaS start-up who are looking to hire a highly skilled Applied AI Engineer to their Product Engineering team, where you'll pioneer 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 ❯

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 ❯

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 ❯

Applied AI Software Engineer - Python, Fast API, AWS, LLMs OB are partnered with a high-growth, B2B SaaS start-up who are looking to hire a highly skilled Applied AI Engineer to their Product Engineering team, where you'll pioneer More ❯

milliseconds, optimise for concurrency, and 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 voice interfaces (STT/TTS … evaluate system performance using observability and 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 or streaming systems More ❯

internal and external applications. What You'll Do Build the Engine: Design, develop, and maintain high-performance, scalable, and secure RESTful APIs using Python, with a strong focus on FastAPI . Integrate Data: Build efficient data querying mechanisms from structured databases. Champion Best Practices: Uphold high standards for clean, maintainable, and well-tested code. Who We're Looking For You … are a seasoned API builder with a proven track record of shipping high-quality services. You have strong expertise in FastAPI and a deep understanding of how to build production-grade APIs used at scale. Must Have: Strong expertise in Python and the FastAPI framework. Strong experience with both SQL and NoSQL databases, including schema design and query optimization. Nice More ❯

internal and external applications. What You'll Do Build the Engine: Design, develop, and maintain high-performance, scalable, and secure RESTful APIs using Python, with a strong focus on FastAPI . Integrate Data: Build efficient data querying mechanisms from structured databases. Champion Best Practices: Uphold high standards for clean, maintainable, and well-tested code. Who We're Looking For You … are a seasoned API builder with a proven track record of shipping high-quality services. You have strong expertise in FastAPI and a deep understanding of how to build production-grade APIs used at scale. Must Have: Strong expertise in Python and the FastAPI framework. Strong experience with both SQL and NoSQL databases, including schema design and query optimization. Nice More ❯

internal and external applications. What You'll Do Build the Engine: Design, develop, and maintain high-performance, scalable, and secure RESTful APIs using Python, with a strong focus on FastAPI . Integrate Data: Build efficient data querying mechanisms from structured databases. Champion Best Practices: Uphold high standards for clean, maintainable, and well-tested code. Who We're Looking For You … are a seasoned API builder with a proven track record of shipping high-quality services. You have strong expertise in FastAPI and a deep understanding of how to build production-grade APIs used at scale. Must Have: Strong expertise in Python and the FastAPI framework. Strong experience with both SQL and NoSQL databases, including schema design and query optimization. Nice More ❯

internal and external applications. What You'll Do Build the Engine: Design, develop, and maintain high-performance, scalable, and secure RESTful APIs using Python, with a strong focus on FastAPI . Integrate Data: Build efficient data querying mechanisms from structured databases. Champion Best Practices: Uphold high standards for clean, maintainable, and well-tested code. Who We're Looking For You … are a seasoned API builder with a proven track record of shipping high-quality services. You have strong expertise in FastAPI and a deep understanding of how to build production-grade APIs used at scale. Must Have: Strong expertise in Python and the FastAPI framework. Strong experience with both SQL and NoSQL databases, including schema design and query optimization. Nice More ❯

internal and external applications. What You'll Do Build the Engine: Design, develop, and maintain high-performance, scalable, and secure RESTful APIs using Python, with a strong focus on FastAPI . Integrate Data: Build efficient data querying mechanisms from structured databases. Champion Best Practices: Uphold high standards for clean, maintainable, and well-tested code. Who We're Looking For You … are a seasoned API builder with a proven track record of shipping high-quality services. You have strong expertise in FastAPI and a deep understanding of how to build production-grade APIs used at scale. Must Have: Strong expertise in Python and the FastAPI framework. Strong experience with both SQL and NoSQL databases, including schema design and query optimization. Nice More ❯

Senior Backend Engineer | Python, FastAPI & Scaling | Security SaaS Prism Digital have partnered with a super interesting and niche VC-backed client specialising in attack surface management and automated red teaming. Their platform provides organisations with real-time visibility into their attack surface and potential exploitable vulnerabilities. They have received numerous awards for being an up-and-coming security SaaS product … build software which scales Building 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. The Package: Up to £85,000 Fully remote 28-day holidays (including bank holidays) Shares options Private … insurance via Bupa Competitive pension Salary reviews every 12 months This role does not accept applicants outside of the UK, nor does it offer sponsorship Senior Backend Engineer | Python, FastAPI & Scaling | Security SaaS More ❯