176 to 191 of 191 FastAPI Jobs in the City of London

. 5–10 years’ software engineering experience with a proven track record of shipping production systems (not just managing teams). Deep experience in backend development, ideally with Python, FastAPI, SQLAlchemy, and PostgreSQL . A genuine interest in AI — you’ve built or integrated AI/LLM-driven tools, experimented with AI frameworks, or used AI-assisted coding tools. Curiosity … experience mentoring or leading small teams is ideal but not essential; this is a role for a builder first, leader second . Tech Snapshot Languages: Python 3.11+, TypeScript Frameworks: FastAPI, SQLAlchemy, Alembic Infrastructure: AWS (IAM, SES, Bedrock) Architecture: Event-driven, API-first, AI-integrated pipelines Databases: PostgreSQL Why This Role Step up from Senior Engineer to Lead Engineer in a 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 ❯

of hardware and software designing scalable backend systems that connect thousands of machines, handle massive real-time data flows. What Youll 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 ❯

scope to grow into leadership as the data team scales. ✨ Remote-first culture – flexibility to work from anywhere What you’ll be doing: API strategy & development – own and scale FastAPI endpoints that deliver real-time access to platform data. Data pipeline development – build ingestion and replication pipelines with best-in-class observability, latency, and resilience. Platform technical vision – influence architecture … reliability and trustworthiness. Collaboration – partner with engineers, product managers, and commercial teams to deliver production-grade solutions. Tech stack and requirements: Python – must-have, with production-grade engineering expertise FastAPI – Nice to have Google Cloud Platform (GCP) – must-have, ie BigQuery, Cloud Run, and Cloud Storage dbt – strong advantage, with scope to shape best practice Airflow/Composer – highly desirable More ❯

Clear scope to grow into leadership as the data team scales. Remote-first culture flexibility to work from anywhere What youll be doing: API strategy & development own and scale FastAPI endpoints that deliver real-time access to platform data. Data pipeline development build ingestion and replication pipelines with best-in-class observability, latency, and resilience. Platform technical vision influence architecture … reliability and trustworthiness. Collaboration partner with engineers, product managers, and commercial teams to deliver production-grade solutions. Tech stack and requirements: Python must-have, with production-grade engineering expertise FastAPI Nice to have Google Cloud Platform (GCP) must-have, ie BigQuery, Cloud Run, and Cloud Storage dbt strong advantage, with scope to shape best practice Airflow/Composer highly desirable 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 ❯

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 ❯

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 ❯

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 ❯

ownership architecture, systems, design, everything. Direct collaboration with the founders in a fast-moving, hands-on setup. Great culture: London Bridge office, collaborative team, Friday lunches Tech Stack - Python, FastAPI, TypeScript, React What theyre looking for: Strong with Python (FastAPI) and TypeScript/React Curious, product-minded and proactive, someone who loves shipping fast Excited by startups and the chance More ❯

ownership — architecture, systems, design, everything. 🧩 Direct collaboration with the founders in a fast-moving, hands-on setup. ⭐️ Great culture: London Bridge office, collaborative team, Friday lunches ⚙️Tech Stack - Python, FastAPI, TypeScript, React ⚙️ What they’re looking for: Strong with Python (FastAPI) and TypeScript/React Curious, product-minded and proactive, someone who loves shipping fast Excited by startups and the More ❯

automated data pipelines and transformation workflows using Python and modern cloud-based technologies. Develop and refine API integrations and backend processes that bring analytics models into production (experience with FastAPI, Django, or comparable frameworks is advantageous). Work extensively within cloud environments (preferably AWS), applying sound architectural understanding to ensure reliability and performance. Collaborate with both engineering and analytics teams … non-technical stakeholders, managing expectations, and communicating clearly. Ability to handle multiple concurrent projects while maintaining high standards of delivery. Nice to Have: Familiarity with Python frameworks such as FastAPI or Django. Experience deploying analytics products into production or working within consultancy/project-led environments. Exposure to multi-source data integration and diverse cloud infrastructures. Understanding of how to 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 ❯