26 to 48 of 48 FastAPI Jobs in London

Lead Python Developer Climate Tech London (Hybrid, 3 days per week) Python, FastAPI, PostgreSQL, GCP, Docker I'm working with a fast-growing climate-tech non-profit tackling one of the most important infrastructure challenges in the energy transition. Backed by some of the biggest names in climate philanthropy, this ...

change lifecycle to gather feedback and ensure successful delivery Key Requirements : Demonstrated commercial experience in Python development Experience developing Web APIs using Flask, FastAPI, Streamlit, or other leading Python frameworks Experience in Azure Cloud environments (AKS) Experience with streaming data (kafka, Azure Service Bus) This London based role offers ...

Engineering Lead | Software Manager | Founding Engineer Python - Agentic AI - FastAPI - CI/CD Fully Remote (UK/Europe) A small and talented team of talented engineers & data scientists are quietly building something interesting. Well-backed and operating in the AI engineering space, they partner with PE backed businesses to solve ...

pipelines on Azure, while ensuring scalability, reproducibility, and monitoring of deployed models. Requirements • Strong, current Python, including building and maintaining production services with FastAPI or similar. • Solid machine learning and computer vision background, with real models shipped to production rather than only notebooks and prototypes. • Hands-on experience with ...

real systems. Experience building or supporting high-throughput data pipelines and distributed or scalable infrastructure. Hands-on experience with web backends such as FastAPI and pragmatic frontend development using vanilla JavaScript. Confidence designing developer-friendly CLIs and operator tooling that are reliable and hard to misuse. Experience with containerisation ...

working cross-functionally Comfortable working in a start-up or scaling environment is a bonus Bonus points if you’ve worked with React, FastAPI, or in scientific or energy domains What you’ll get in return The role offers a salary of up to £100,000 DOE, alongside equity ...

RSSB are now seeking an experienced Principal Technical Lead to drive the hands-on technical delivery of a new greenfield industry services platform. This is an exciting delivery-focused role for a senior engineer who ...

select AI technologies (open-source and commercial) and define enterprise deployment patterns Lead design of API-based AI services and scalable backend systems (e.g. FastAPI) Ensure robust integration of AI systems into complex banking and capital markets environments Establish and govern evaluation frameworks for AI and agent-based systems Oversee … experience building and scaling agentic AI systems Strong experience with AI system design, architecture, and distributed systems Expertise in API-based backend development (e.g. FastAPI or similar) Experience with vector databases (e.g. Pinecone, Chroma) Experience with agent frameworks (e.g. LangChain, LangGraph, or similar) Strong understanding of evaluation frameworks ...

engineer bridging the gap between research breakthroughs and production-ready capabilities to generate tangible business value. Build Robust Infrastructure: Develop enterprise-scale APIs (FastAPI) and architect comprehensive cloud-based AI infrastructure on AWS/Azure optimized for scalability and performance. Demonstrate Full-Stack Excellence: Apply your expertise across the entire … applications using LangChain and LangGraph (agent architecture design, state management, and graph-based workflow orchestration). ML & Cloud Ecosystems: Solid understanding of ML algorithms, FastAPI, PyTorch/TensorFlow, MLflow, MLOps practices, containerization (Docker, Kubernetes/AWS EKS), and cloud services (AWS Bedrock, SageMaker, Azure AI Search). Soft Skills: Excellent ...

engineer bridging the gap between research breakthroughs and production-ready capabilities to generate tangible business value. Build Robust Infrastructure: Develop enterprise-scale APIs (FastAPI) and architect comprehensive cloud-based AI infrastructure on AWS/Azure optimized for scalability and performance. Demonstrate Full-Stack Excellence: Apply your expertise across the entire … applications using LangChain and LangGraph (agent architecture design, state management, and graph-based workflow orchestration). ML & Cloud Ecosystems: Solid understanding of ML algorithms, FastAPI, PyTorch/TensorFlow, MLflow, MLOps practices, containerization (Docker, Kubernetes/AWS EKS), and cloud services (AWS Bedrock, SageMaker, Azure AI Search). Soft Skills: Excellent ...

Backend Software Engineer/Developer (Python FastAPI SQL Databricks) London to £95k Are you a data centric Backend Software Engineer with strong Python, SQL and FastAPI skills? You could be progressing your career in a senior, hands-on role at a fast growing, global Insurance Underwriting technology provider that focusses … loan Employee Assistance Programme Impactful role with great career progression Apply now to find out more about this Backend Software Engineer/Developer (Python FastAPI Databricks Azure) opportunity. ...

Python back end Small, fast-moving team with high ownership and real impact Stack flexible, as long as you are happy in Python, FastAPI and React Salary up to £100,000 depending on experience Ideally a genuine sports fan ABOUT THE CLIENT We are supporting a fast growing company building … line to product decisions. KEY RESPONSIBILITIES Build intuitive, performant web interfaces using React, Next.js and TypeScript Design and maintain sophisticated APIs using Python and FastAPI Work with real time data streaming, including SSE and WebSockets Translate complex sports data and logic into clean, efficient code Own the front end lifecycle ...

those in a tech lead or staff engineer role - Python and TypeScript/Node, with solid React/Next.js and NestJS/FastAPI experience - PostgreSQL, including schema design, query performance, ETL/ELT, and analytical workloads at scale - LLM/AI features shipped to production users, covering evals, guardrails, prompt … Tech Lead, Technical Lead, Staff Engineer, Principal Engineer, Private Credit, Private Markets, Capital Markets, AI Platform, Analytics Platform, Python, TypeScript, Node.js, React, Next.js, NestJS, FastAPI, PostgreSQL, pgvector, LangChain, LangGraph, LiteLLM, AWS, LLM, Fintech, Greenfield, Remote, Hybrid/Remote, Contract ...

those in a tech lead or staff engineer role - Python and TypeScript/Node, with solid React/Next.js and NestJS/FastAPI experience - PostgreSQL, including schema design, query performance, ETL/ELT, and analytical workloads at scale - LLM/AI features shipped to production users, covering evals, guardrails, prompt … Tech Lead, Technical Lead, Staff Engineer, Principal Engineer, Private Credit, Private Markets, Capital Markets, AI Platform, Analytics Platform, Python, TypeScript, Node.js, React, Next.js, NestJS, FastAPI, PostgreSQL, pgvector, LangChain, LangGraph, LiteLLM, AWS, LLM, Fintech, Greenfield, Remote, Hybrid/Remote, Contract ...

Looking For You may be a strong fit if you have: 5+ years of software engineering experience. Strong backend skills, ideally Python, FastAPI, or a similar stack. Strong frontend and product engineering ability, ideally React, Next.js, TypeScript, or equivalent. Good SQL and data modelling instincts. Experience building data-heavy, workflow … transparency and correctness. Technical Areas You do not need to know all of these, but the role will touch many of them: Python, FastAPI, Pydantic React, Next.js, TypeScript Postgres and SQL Object storage and artifact management Background jobs, queues, and workflow orchestration Auth, permissions, rate limiting Observability, logs, tracing Vercel ...

Python-based services within a secure, enterprise environment. Focus on API development, system integration, and reliable delivery. Key Responsibilities Build backend services using Python (FastAPI) Develop APIs and integrate across disconnected systems Deploy solutions via Azure Function Apps Implement CI/CD pipelines (GitHub) Write and optimise SQL queries Contribute … secure design Clarify requirements, identify gaps, and shape solutions Support delivery and manage client expectations C# and .Net Skills Skills & Experience Strong Python + FastAPI experience Hands-on delivery background Azure (Function Apps essential) DevOps/CI-CD (GitHub) Solid SQL (querying, not DBA) Architecture awareness (security, scalability) Strong communication ...

Python-based services within a secure, enterprise environment. Focus on API development, system integration, and reliable delivery. Key Responsibilities Build backend services using Python (FastAPI) Develop APIs and integrate across disconnected systems Deploy solutions via Azure Function Apps Implement CI/CD pipelines (GitHub) Write and optimise SQL queries Contribute … secure design Clarify requirements, identify gaps, and shape solutions Support delivery and manage client expectations C# and .Net Skills Skills & Experience Strong Python + FastAPI experience Hands-on delivery background Azure (Function Apps essential) DevOps/CI-CD (GitHub) Solid SQL (querying, not DBA) Architecture awareness (security, scalability) Strong communication ...

Backend Engineer (Python/FastAPI) Fast-Growing Sports AI Company KEY POINTS Hybrid role based in London Build real time, data rich applications for the sports industry Small, fast-moving team with high ownership and real impact Work at the forefront of AI and LLMs applied to sport Stack flexible … long as you are happy in Python, FastAPI and modern web tooling Salary up to £100,000 depending on experience Ideally a genuine sports fan ABOUT THE CLIENT We are supporting a fast-growing company building cutting edge AI solutions for the sports industry. The business is small, ambitious ...

Backend Engineer (Python/FastAPI) Fast-Growing Sports AI Company KEY POINTS Hybrid role based in London Build real time, data rich applications for the sports industry Small, fast-moving team with high ownership and real impact Work at the forefront of AI and LLMs applied to sport Stack flexible … long as you are happy in Python, FastAPI and modern web tooling Salary up to £100,000 depending on experience Ideally a genuine sports fan ABOUT THE CLIENT We are supporting a fast-growing company building cutting edge AI solutions for the sports industry. The business is small, ambitious ...

deployment. The Role You will: * Own and extend internal web applications used for robot data collection, review, QA, and dataset publishing* Build and maintain FastAPI backends, vanilla JavaScript frontends, CLI tooling, and supporting services* Improve recording workflows, state machines, config validation, batch processing, stale-data recovery, and archival processes* Containerise … have: * Senior-level software engineering experience, ideally 5+ years* Strong production Python experience* Experience with typing, async/await, threading, multiprocessing, and concurrent workloads* FastAPI or another async Python web framework* Vanilla JavaScript, including DOM manipulation, fetch, and WebSockets* Experience building internal tooling, operator tooling, platform tooling, or workflow orchestration ...

Lead Python Developer Climate Tech London (Hybrid, 3 days per week) Python, FastAPI, PostgreSQL, GCP, Docker I'm working with a fast-growing climate-tech non-profit tackling one of the most important infrastructure challenges in the energy transition. Backed by some of the biggest names in climate philanthropy, this … optimisation, and performance challenges at scale - a long way from your average API job. Requirements: 7+ years experience developing and maintain scalable Python/FastAPI back-end services Ideally worked with high-performance APIs for complex hierarchical data queries and grid modelling computations Managed and optimised GCP cloud infrastructure, implementing ...

Data Engineer (GCP) Start: ASAP Duration: 6 months Location: London (office based) Rate: up to £455 per day (inside IR35) We are looking for a Data Engineer to support the design and development of scalable ...

extend a GCP-first platform, working with tools like BigQuery, Airflow, dbt, and Terraform. You’ll also help build internal applications using Python, FastAPI, and React, giving teams easy ways to trigger workflows and access data. Alongside this, you’ll improve data quality, monitoring, and automation, ensuring everything is robust … data modelling skills Comfortable working in a start-up or scaling environment is a bonus Bonus points if you’ve worked with React, FastAPI, or in scientific or energy domains Ability to come into the London office three days per week What you’ll get in return for your experience ...