FastAPI Jobs in the City of London

26 to 42 of 42 FastAPI Jobs in the City of London

Software Engineer (Python/React)

City of London, London, United Kingdom
Oliver Bernard
AI Startup – Up to 85k 🚀🧠 💰 Salary: £50,000 - £85,000 + meaningful equity 🏙️ Location : London, flexible working arrangements, ideally 1/2 days in office 💻 Tech Stack : Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite engineering team within the AI space. The platform is being used across the globe and is More ❯
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Senior Product Engineer (FullStack)

City of London, London, United Kingdom
Hybrid / WFH Options
Skippr
is backed by top VCs, like Bessemer ( Anthropic , Perplexity , Shopify ), and executives from Fiverr , Meta , Google , Lyft and more. 🏗️ What you’ll do Event-driven backend : Architect our Python (FastAPI)/TypeScript/React/Supabase stack. Own schema design, real-time subscriptions, and AI agent orchestration to power contextual product workflows. Agent Experience (AX): Shape intuitive interfaces for human More ❯
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Senior Product Engineer (FullStack)

london (city of london), south east england, united kingdom
Hybrid / WFH Options
Skippr
is backed by top VCs, like Bessemer ( Anthropic , Perplexity , Shopify ), and executives from Fiverr , Meta , Google , Lyft and more. 🏗️ What you’ll do Event-driven backend : Architect our Python (FastAPI)/TypeScript/React/Supabase stack. Own schema design, real-time subscriptions, and AI agent orchestration to power contextual product workflows. Agent Experience (AX): Shape intuitive interfaces for human More ❯
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Full Stack Engineer

City of London, London, United Kingdom
Oliver Bernard
AI Startup – Up to 85k 🚀🧠 💰 Salary: £60,000 - £85,000 + meaningful equity 🏙️ Location : London, flexible working arrangements, ideally 1/2 days in office 💻 Tech Stack : Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite engineering team within the AI space. The platform is being used across the globe and is More ❯
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Green Tech / Energy Tech Start-Up | Full Stack Engineer | LDN 2 Days Per Week | £50K - £100K + Healthy Equity

City of London, London, United Kingdom
Hybrid / WFH Options
Owen Thomas | Pending B Corp™
measures, sensors) -> Offline-first/PWA apps for installers on the move Tech Stack: -> React, TypeScript, Konva, Tailwind -> Node.js, PostGREST, Prisma -> PostgreSQL/PostGIS, Docker, Atlas -> (Sunsetting Python + FastAPI) Requirements for Carbon Emission/Green Tech Start-up | Full Stack Engineer | LDN 2 Days Per Week | £50K - £100K + Healthy Equity -> 2 - 4 years commercial experience -> STEM Background -> React More ❯
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Green Tech / Energy Tech Start-Up | Full Stack Engineer | LDN 2 Days Per Week | £50K - £100K + Healthy Equity

london (city of london), south east england, united kingdom
Hybrid / WFH Options
Owen Thomas | Pending B Corp™
measures, sensors) -> Offline-first/PWA apps for installers on the move Tech Stack: -> React, TypeScript, Konva, Tailwind -> Node.js, PostGREST, Prisma -> PostgreSQL/PostGIS, Docker, Atlas -> (Sunsetting Python + FastAPI) Requirements for Carbon Emission/Green Tech Start-up | Full Stack Engineer | LDN 2 Days Per Week | £50K - £100K + Healthy Equity -> 2 - 4 years commercial experience -> STEM Background -> React More ❯
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Full Stack Product Engineer

City of London, London, United Kingdom
Oliver Bernard
with less than 10 heads, and they're now looking for a founding-level engineer to join the core London team. Tech stack: Frontend : React, Next.js, TypeScript Backend : Python, FastAPI Happy for candidates to lean towards to backend or the frontend Why this role stands out: Stealth-stage, high-impact : You’ll work on tech that’s pre-launch but More ❯
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Search Relevance Engineer - REMOTE UK/US/EU

City of London, London, United Kingdom
Hybrid / WFH Options
Xcede
hands-on experience developing with Elasticsearch, with proven expertise in relevance engineering. Demonstrable use of ELK stack tools in production environments. Experience creating and deploying APIs in production (e.g. FastAPI). Solid understanding of database architecture and design. A strong test-and-learn mindset, with experience in offline evaluation methods. Excellent problem-solving skills, strategic thinking, and the ability to More ❯
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AI Product Engineer (Junior - Mid)

City of London, London, United Kingdom
Hybrid / WFH Options
SlideSpeak
building out a one-of-a-kind AI-first presentation editor, so we hope you like working with 2D graphics. Key Responsibilities: Build and maintain backend services using Python, FastAPI, and other frameworks Develop and optimize front-end UI with NextJS, React, and TypeScript Develop LLM and ML services to generate content for presentations (images, infographics, icons, content, ...) Collaborate … NextJS, React, TypeScript Familiarity with cloud services (AWS, GCP, Azure) and server management via shell Practical experience through internships or personal projects Nice to have Experience with Python backends, FastAPI, and RAG frameworks like LangChain, Llama Index Knowledge of vector databases and advanced database management systems Knowledge of 2D graphics editors and SVG (yep, it gets quite nitty gritty) Previous … experience in fast-paced startup environments Tech Stack Frontend: NextJS, Zustand, Tailwind, Prisma Backend: Python, FastAPI, Llama Index Database: PostgreSQL, PGVector LLMs & AI: Azure OpenAI, Google Gemini Flash, Replica DevOps: GitHub Actions, Checkly, Docker Compose, Azure, GCP, AWS Benefits Fully remote work environment with flexible scheduling Company-provided laptop and software budget tailored to your needs Budget for attending industry More ❯
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ML Ops Engineer

City of London, London, England, United Kingdom
INTEC SELECT LIMITED
MLOps Engineer Our trusted partner, which operates within the Ed-Tech domain, employs over 10,000 individuals across 100 countries and has a reach of 600 million users, is recruiting an MLOps Engineer who has Chatbot (Voice) integration project experience More ❯
Employment Type: Contractor
Rate: £400.00 per hour
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Founding Engineer

City of London, London, United Kingdom
Fleetcraft
shape the future. High trust, high ownership: Make decisions that move the whole company forward. We value autonomy, speed, and impact. Cutting-edge stack: Build with modern tools — Python, FastAPI, TypeScript, LLMs, MLOps — on high-stakes, real-world problems What We’re Looking For 2+ years of software development experience Proven track record of building and shipping full-stack products … owning outcomes end-to-end — from design and implementation to iteration and support 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: 1. Talent Screen (30 min video call) 2. Hiring Manager Interview (30 min video More ❯
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Founding Engineer

london (city of london), south east england, united kingdom
Fleetcraft
shape the future. High trust, high ownership: Make decisions that move the whole company forward. We value autonomy, speed, and impact. Cutting-edge stack: Build with modern tools — Python, FastAPI, TypeScript, LLMs, MLOps — on high-stakes, real-world problems What We’re Looking For 2+ years of software development experience Proven track record of building and shipping full-stack products … owning outcomes end-to-end — from design and implementation to iteration and support 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: 1. Talent Screen (30 min video call) 2. Hiring Manager Interview (30 min video More ❯
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Senior Software Developer | Positive Impact EdTech Startup

City of London, London, United Kingdom
Oho Group Ltd
product, and engineering culture from the very beginning. What You’ll Do Build, scale, and iterate on our core learning platform with Python at the heart of the stack (FastAPI/Django + modern frontend). Take ownership of end-to-end features — from database models to APIs to polished UI. Design clean, reliable backend systems that make the platform … best practices and nurture an inclusive, collaborative culture. What We’re Looking For Strong Python engineering skills — you write clean, testable, production-ready code. Experience with modern frameworks like FastAPI, Django, or Flask . Comfortable across the stack: JavaScript/TypeScript with React (or similar) on the frontend. Passion for building engaging, user-friendly applications — interest in gamification, interactive content More ❯
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Senior Software Developer | Positive Impact EdTech Startup

london (city of london), south east england, united kingdom
Oho Group Ltd
product, and engineering culture from the very beginning. What You’ll Do Build, scale, and iterate on our core learning platform with Python at the heart of the stack (FastAPI/Django + modern frontend). Take ownership of end-to-end features — from database models to APIs to polished UI. Design clean, reliable backend systems that make the platform … best practices and nurture an inclusive, collaborative culture. What We’re Looking For Strong Python engineering skills — you write clean, testable, production-ready code. Experience with modern frameworks like FastAPI, Django, or Flask . Comfortable across the stack: JavaScript/TypeScript with React (or similar) on the frontend. Passion for building engaging, user-friendly applications — interest in gamification, interactive content More ❯
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Founding Engineer

City of London, London, United Kingdom
Hybrid / WFH Options
SR2 | Socially Responsible Recruitment | Certified B Corporation™
SR2 are currently looking for a highly motivated Founding Engineer (Full Stack) for sustainability start-up in London. This will be both a hands-on and managerial role. You will be leading by doing: writing high-quality code, setting technical More ❯
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API Engineer (Python, FastAPIs)

City of London, London, United Kingdom
numi
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 ❯
Posted:

API Engineer (Python, FastAPIs)

london (city of london), south east england, united kingdom
numi
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 ❯
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FastAPI
the City of London
10th Percentile
£76,250
25th Percentile
£77,813
Median
£97,500
75th Percentile
£140,000
90th Percentile
£150,000