24 of 24 FastAPI Jobs in Central London

GenAI Full Stack Engineer - Managing Consultant

Hiring Organisation
83zero Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£80,000
skills by exploring and experimenting with emerging technologies, including GenAI. Your skills and experience: Backend Development: Experience in building microservices using either Python with FastAPI, or TypeScript with Express or equivalent Frontend Development: Experience in building React applications using TypeScript, leveraging frameworks such as Next.js or Vite. GenAI Frameworks: Familiarity ...

Senior Full-Stack Developer

Location
City Of London, England, United Kingdom
like React Proficiency with writing maintainable Python and Typescript, including experience of working with relevant libraries for data processing and backend API development (i.e., FastAPI, Pydantic, expressJS, NodeJS, NextJS API Router, etc) Good understanding of cloud deployment Strong understanding and proven experience working with browsers and web APIs including HTML ...

Agentic AI / GenAI Consultant | From PoC to Production

Location
City Of London, England, United Kingdom
demonstrate business value Supporting demonstrations, proposals, bids and the development of new AI offerings Experience Required Building robust AI services and APIs using Python, FastAPI, Django or Flask, supported by strong SQL Create engaging, responsive AI products using TypeScript, JavaScript, React and Next.js Ground LLM applications in trusted business data ...

Senior Python Developer/ Engineer

Location
City of Westminster, England, United Kingdom
containerized architecture with a NextJS/React client frontend. Design, develop, and maintain scalable RESTful APIs and microservices using Python frameworks such as FastAPI or Flask. Build and support cloud-native solutions leveraging AWS services including Lambda, ECS Fargate, API Gateway, DynamoDB, S3, Secrets Manager, and CloudWatch. Work closely with … delivery. Contribute to documentation, knowledge sharing, and continuous improvement within the engineering team. Requirements: Professional software engineering experience. Strong commercial experience with Python using FastAPI, Flask, or similar backend frameworks. Extensive experience developing RESTful APIs, microservices, and backend services. Strong hands‐on experience with AWS cloud services, including ECS Fargate ...

Lead Agentic AI Engineer

Location
City Of London, England, United Kingdom
production‐quality code practices Strong understanding of software engineering principles, architecture patterns, and delivery best practices Experience with API development using frameworks such as FastAPI, Flask, or Django Knowledge of Docker, containerised deployments, CI/CD, and cloud‐native delivery patterns What Will Make You Stand Out Experience building, deploying ...

Developer

Location
City Of London, England, United Kingdom
extending existing models; Bloomberg API integration to Python; data science/statistics, signal research, backtesting or factor modelling; full stack familiarity (Flask, Django, FastAPI); SaaS build/deploy on cloud (Docker, AWS or similar); an understanding of Java; and experience in quantitative finance or with financial market data. Qualifications & Experience ...

Senior Software Engineer

Hiring Organisation
The Portfolio Group
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£90000/annum
comfortable across backend and frontend engineering. Strong commercial Python experience building, deploying and maintaining production services. Excellent TypeScript and React development experience. Experience with FastAPI or similar Python backend frameworks. A strong understanding of software architecture, system design and engineering trade-offs. Solid knowledge of concurrency, asynchronous programming, APIs ...

Engineering Team Lead AI Python

Hiring Organisation
Client Server
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
close to the code while supporting your team to deliver. You'll drive cloud first engineering across an Azure based platform, using Python/FastAPI, React/TypeScript, PostgreSQL, MongoDB and a multi-provider LLM stack including OpenAI, Gemini and Anthropic. You'll champion high quality, scalable and cost effective ...

Full Stack AI Engineer

Location
City Of London, England, United Kingdom
including APIs, databases, Git, testing, debugging, and application architecture.Familiarity with frontend and backend development using technologies such as React, Node/TypeScript, Python/FastAPI, or similar.Conceptual understanding of cloud platforms such as AWS, Azure, or GCP; hands-on deployment experience is beneficial but not required.Exposure to generative AI application ...

Lead Machine Learning Engineer - Inside IR35 - £700/day - Hybrid

Hiring Organisation
RecOps
Location
City, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 700 Daily
leadership, solution architecture and mentoring engineers Model evaluation, monitoring, guardrails and production support Cloud experience (ideally Azure), Docker, Kubernetes and CI/CD Desirable: FastAPI, LangGraph, LangChain, LlamaIndex or MLflow LLMOps/MLOps and model fine-tuning experience Insurance, financial services or other regulated industry experience Please apply ...

Snr Machine Learning Engineer - Client facing - 12 months FTC

Location
London Borough of Southwark, England, United Kingdom
evaluating tree-based, temporal, NLP or LLM-based models. Experience building reproducible training and evaluation pipelines, and containerising and deploying models (for example, Docker, FastAPI). Strong SQL, a solid grounding in relational databases, schemas and data transformations (ideally DBT), and experience preparing data for model training and scoring. Hands ...

Principal Software Engineer Python AI - FinTech

Hiring Organisation
Client Server
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
have strong commercial software engineering experience, at Senior or Principal level You have expertise with Python development combined with experience using Django or FastAPI (happy to use Django going forward) You can lead the design and delivery of software products and take projects from initial concept through to production ...

Lead Software Developer

Hiring Organisation
ALFA TECHNOLOGY RECRUITMENT LTD
Location
City of London, London, United Kingdom
Employment Type
Permanent
obsessed with the customer, which is how we hold 4.9 on both Trustpilot and Google. The stack: TypeScript on the backend, Python and FastAPI for Jay, Next.js up front, AWS underneath, Claude Code woven through how we build. You won't have used all of it, and you'll change ...

Lead Software Engineer

Hiring Organisation
Sanderson Government and Defence
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £500 per day + Outside IR35
Proven experience operating as a Lead Engineer or Principal Engineer within complex delivery environments. Strong experience developingbackend services using: Kotlin Java Spring Boot Python FastAPI Frontend development experience using: TypeScript Node.js Express Experience working within cloud-native environments and modern software delivery practices. Ability to operate independently and drive outcomes ...

Lead Backend Engineer

Hiring Organisation
ALFA TECHNOLOGY RECRUITMENT LTD
Location
City of London, London, United Kingdom
Employment Type
Permanent
obsessed with the customer, which is how we hold 4.9 on both Trustpilot and Google. The stack: TypeScript on the backend, Python and FastAPI for Jay, Next.js up front, AWS underneath, Claude Code woven through how we build. You won't have used all of it, and you'll change ...

Engineering Team Lead | Tech | London, UK

Location
City of Westminster, England, United Kingdom
Virtual Personas Delivery of the Product roadmap Managing a team consisting of a range of skillsets and experience Full stack development, across Python/FastAPI services and React/TypeScript front ends Continuously improving the team's processes for iterative development, including embedding automated testing and CI quality gates into … encouraging our developers Conducting regular 121's, setting objectives and assisting with tailored development plans Our engineering environment includes technologies such as Python (FastAPI), LangChain/LangGraph for multi-agent LLM orchestration, React/TypeScript, PostgreSQL, MongoDB, Redis, Azure (App Service, Container Registry, Blob Storage), Docker, GitHub Actions, and modern ...

Forward Deployed AI Engineer

Location
City of Westminster, England, United Kingdom
document intelligence and custom tools, with a focus on evaluation pipelines, model routing, and agent/tool orchestration and permissions. Working with Python (including FastAPI), specifically LangChain (and LangGraph where necessary), SQL and scalable (vector) databases. Enforcing rigorous evaluation to cover edge cases and determine specific mitigations for prompt injection ...

Enterprise AI Architect: Agentic Systems Lead

Location
City Of London, England, United Kingdom
with platform engineers through design, build and deployment. You will guide architecture, governance, and implementation across complex engagements. The role requires hands-on Python (FastAPI), experience with agentic AI frameworks and MCP, and a track record of shipping AI at #J-18808-Ljbffr ...

Backend Engineers Mid-Level & Senior

Hiring Organisation
Anson Mccade
Location
City of London, London, United Kingdom
Employment Type
Permanent
technical leadership, mentor other engineers and support the development of engineering best practice. Essential Skills & Experience Strong backend development experience using Python , with Django, FastAPI or other Python frameworks. Experience designing and building scalable, maintainable backend services. Good understanding of databases, object-oriented design, data structures and distributed systems. Knowledge … clearly and work collaboratively with technical and non-technical stakeholders. Technology Environment The team works with a modern technology stack, including: Python, Django and FastAPI AWS and Kubernetes PostgreSQL, Redis and Elasticsearch Kafka and GitHub Experience across every technology listed isn't essential; strong Python backend development experience ...

Full Stack Engineer (Front-End Leaning)

Location
City Of London, England, United Kingdom
About the company The company is an enterprise AI platform that helps major financial institutions transform complex, manual workflows into automated systems for producing and validating client-ready work. Its technology enables global teams to ...

AIML Software Engineer, AI for Science

Location
City Of London, England, United Kingdom
About the Role At GSK, we are actively working on building a future in which state-of-the-art software, Artificial Intelligence (AI) and Machine Learning (ML) enable us to develop new therapies and personalized ...

Forward Deployed Engineer - Lead AI & Agentic Engineer

Location
City Of London, England, United Kingdom
APIs, vector databases, and MCP (Model Context Protocol) tooling Process unstructured data into condensed, structured knowledge, including ontology extraction Write production‐grade Python services (FastAPI) with solid engineering practices: design, testing, code review, CI/CD Work with relational and graph databases (e.g. Postgres, Neo4j) to model and serve data … Experience 8–10+ years in software or solution engineering, with a track record of shipping AI systems in client‐facing engagements Strong Python engineering (FastAPI), with solid SDLC practices: design, testing, code review, CI/CD, Git & GitHub Hands‐on experience with agentic AI frameworks (examples include LangGraph, CrewAI, AutoGen ...

Python Engineer / Tech Lead - FinTech

Hiring Organisation
Client Server
Location
Central London, London, United Kingdom
Employment Type
Permanent, Work From Home
Python Engineer/Tech Lead (FastAPI GCP) London/WFH to £140k+ Are you a skilled a backend focussed Python technologist with technical leadership skills? You could be progressing your career at a well funded and profitable FinTech scale-up. As a Python Engineer/Tech Lead you'll head … good knowledge of cloud based services (they use GCP but AWS or Azure experience is fine) You have experience of building APIs, ideally FastAPI experience You have a good knowledge of CI/CD, testing and deployment You have a thorough understanding of Computer Science fundamentals such as OOP, Data ...

Lead Platform Engineer

Location
City of Westminster, England, United Kingdom
Responsible for leading the design and development of our core applications and internal tools, including multiple production UIs built using Python-centric stacks (e.g. FastAPI, Jinja, HTMX, Tailwind). Responsible for making and guiding implementation decisions across backend services, APIs and application architecture. Contribute directly to production code, setting … pragmatic approach to debugging and system design. Comfort working in evolving environments where priorities change and ambiguity exists. Nice to Have Skills Experience with FastAPI or similar Python web frameworks. Experience with infrastructure-as-code and cloud platforms. Familiarity with lightweight frontend approaches (e.g. server-rendered HTML, HTMX, utility-first ...