1 to 25 of 68 FastAPI Jobs in London

AI Engineer

Hiring Organisation
Cerberus Capital Management
Location
City of London, London, United Kingdom
performance monitoring. Experience collaborating with engineering teams to ensure scalable and maintainable deployment. Backend & service development: Experience building production-grade Python webservices (e.g., FastAPI, Flask), developing APIs, and integrating ML components into broader systems. Software engineering practices: Comfortable with testing, code reviews, CI/CD pipelines, and version control ...

GenAI Full Stack Developer (SC Cleared/Eligible)

Hiring Organisation
Sanderson Recruitment
Location
London, United Kingdom
Employment Type
Permanent
Salary
£85,000
public services and deliver real impact. What You'll Do Develop GenAI applications using frameworks like LangChain, LangGraph, CrewAI . Build microservices with Python (FastAPI) or TypeScript (Express) . Create front-end solutions using React, TypeScript , and modern frameworks like Next.js . Integrate LLMs (OpenAI, Anthropic, Mistral) and vector databases ...

GenAI Full Stack Engineer - Consultant / Senior Consultant

Hiring Organisation
83zero Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£70,000
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 ...

Lead GenAI Full Stack Engineer / Managing Consultant

Hiring Organisation
83zero Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£85,000
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 ...

GenAI Full Stack Engineer - Consultant / Senior Consultant

Hiring Organisation
83zero Ltd
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£60,000 - £70,000 per annum
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 ...

Lead GenAI Full Stack Engineer / Managing Consultant

Hiring Organisation
83zero Ltd
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £88,000 per annum
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 ...

Generative AI Consultant

Hiring Organisation
83zero Ltd
Location
City, London, United Kingdom
Employment Type
Permanent
Salary
GBP 45,000 - 70,000 Annual
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 ...

Generative AI Consultant

Hiring Organisation
83zero Ltd
Location
London, Fleet Street, United Kingdom
Employment Type
Permanent
Salary
£45000 - £70000/annum Bonus, Pension, PH, LA
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 ...

Generative AI Engineer

Hiring Organisation
83zero Limited
Location
Central London, London, United Kingdom
Employment Type
Permanent
Salary
£85,000
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 Developer

Hiring Organisation
Reed.co.uk
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£80,000 per annum
commercial software development experience. Proven success in high-performing engineering teams in fast-paced environments. Deep expertise in development with: Python (Django, Flask, or FastAPI) PostgreSQL (design, optimisation, maintenance) Containerisation (Docker/Kubernetes) Event-driven architecture (Kafka/RabbitMQ) Nice to have experience with: TypeScript/JavaScript (NextJS, NodeJS, Tailwind ...

Senior Software Developer

Hiring Organisation
Reed
Location
Holborn, London, England, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £80,000 per annum, Inc benefits
years of commercial software development experience. Proven success in high-performing engineering teams within fast-paced environments. Deep expertise in: Python (Django, Flask, or FastAPI) PostgreSQL (design, optimisation, maintenance) Containerisation (Docker/Kubernetes) Event-driven architecture (Kafka/RabbitMQ) Desirable experience includes: TypeScript/JavaScript (NextJS, NodeJS, Tailwind) Terraform ...

AI Automation Engineer

Hiring Organisation
McCabe & Barton
Location
Central London, London, United Kingdom
Employment Type
Permanent
integrating Appian with external systems via REST APIs, web services, and connected systems. API Development & Integration - Proficient in designing and building RESTful APIs using FastAPI, Flask, or Django REST Framework for exposing AI models and automation services. Experience with API authentication (OAuth, JWT), rate limiting, error handling, API documentation (Swagger ...

AI / GenAI Engineer - Investment Banking / Capital Markets

Hiring Organisation
Caspian One
Location
City of London, Greater London, UK
/LLMs: OpenAI API, Hugging Face Transformers, LangChain, Langraph, RAG pipelines Data & Analytics: Pandas, NumPy, Spark, Databricks, Hadoop, Vector Databases, Snowflake Model Deployment: MLflow, FastAPI, Flask, Docker, Kubernetes Cloud & Infrastructure: AWS, Azure, GCP CI/CD pipelines (GitLab, Jenkins) Desirable Skills Experience with prompt engineering, fine-tuning LLMs, and building ...

Senior Full Stack Developer

Hiring Organisation
Glite Tech
Location
City of London, London, United Kingdom
scalable mobile APIs (REST, HTTPS, etc.). Good principles of security management (secrets, protocols, etc.). Experience with some Python web frameworks (Django, Flask, FastAPI, etc.). Desirable Skills 👌 Can speak, or learning to speak, more than one language Experience with real-time databases. Experience with in-memory databases. Experience ...

Senior Machine Learning Engineer (LLM)

Hiring Organisation
AdvisoryAI
Location
City of London, London, United Kingdom
rocket ship company. This is your chance to join early, build something that matters, and win big. 🧑🏻‍💻 Our Current Tech Infrastructure : Python 3.11+, FastAPI, React/TypeScript, AWS (Lambda, ECS, Bedrock, SageMaker), PostgreSQL + Qdrant, Redis, Docker, Kubernetes, GitHub Actions, Terraform Vector Search : Pinecone, pgvector, hybrid retrieval (dense + sparse ...

Full Stack Engineer

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£120,000 - £160,000 per annum
delivering modern web applications using React and Next.js, ensuring high-quality user experiences. You'll build and maintain backend services using Python (Django/FastAPI preferred), integrating with relational and NoSQL databases to support scalable features. A key part of the position is owning end-to-end system performance, including ...

AI Engineer

Hiring Organisation
Certain Advantage
Location
South East London, London, United Kingdom
Employment Type
Contract
relevant as possible, please ensure your CV demonstrates any prior experience you have relating to the below; System Integration & Deployment Model Deployment: Flask, FastAPI, MLflow Model Serving: Triton Inference Server, Hugging Face Inference Endpoints API Integration: OpenAI, Anthropic, Cohere, Mistral APIs LLM Frameworks: LangChain, LlamaIndex for building LLM-powered applications ...

UI Developer - 13042

Hiring Organisation
Pontoon
Location
Bromley, London, United Kingdom
Employment Type
Contract
JavaScript/TypeScript Strong understanding of component-based architecture and state management. Hands-on experience in Python service-side development and APIs (e.g., FastAPI ). Familiarity with testing frameworks ( Vitest , React Testing Library ) and pytest for Python. Experience with CI/CD tools and collaborative development workflows using Git/ ...

Lead Data & Platform Engineer London

Hiring Organisation
FLOX
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £90,000 per annum
derived data sets Terabyte scale data on edge and cloud On-prem, cloud and edge compute DevOps/MLOps/Software Development Python and FastAPI Kafka, MySQL, MongoDB, PostgreSQL Docker; Kubernetes networking and service mesh; RKE2 RTMP, WebRTC, HLS, MPEG-DASH Prometheus, Grafana, Alertmanager, Thanos; ELK; Jaeger; custom exporters Jenkins ...

Senior Software Engineer Python TypeScript

Hiring Organisation
Client Server
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
office (close to Waterloo) with flexibility to work from home twice a week. About you: You have strong backend Python coding skills, ideally including FastAPI You have full stack experience, including TypeScript and React (or other framework) You have a good understanding of system design and scalability You're familiar ...

Backend Engineer

Hiring Organisation
Anson Mccade
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
improvement in processes and tooling within Agile workflows. Apply best practices in object-oriented design, SOLID principles, and data structures. Tech Stack: Python, FastAPI, Django AWS, Kubernetes, Helm, Terraform PostgreSQL, OpenSearch GitHub Required Experience & Skills: Strong experience building backend services in Python (any framework). Solid understanding of databases ...

Senior Software Engineer TypeScript React

Hiring Organisation
Client Server
Location
East London, London, United Kingdom
Employment Type
Permanent, Work From Home
work from home twice a week. About you: You have strong TypeScript and React skills You have some backend Python coding skills, ideally including FastAPI You have a good understanding of system design and scalability You're familiar with other technology in the stack including: AWS, Terraform, Docker, PostgreSQL, DynamoDB ...

Research Engineer

Hiring Organisation
Harnham
Location
City of London, London, United Kingdom
graduates or more senior engineers Infrastructure or deployment experience (AWS, Terraform) is a bonus Happy working onsite five days per week Tech stack Python, FastAPI React, TypeScript Postgres AWS, Terraform Compensation & details up to £185k base + equity (flexible for exceptional profiles) Visa sponsorship available Standard pension Five meals ...

Python Software Engineer - Fintech

Hiring Organisation
Run-Time Group Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent
class - 2;1 Degree in Comp Sci or STEM subject from a Top ranked University 3+ years of experience in Python development Tech: Python, FastAPI, Pydantic, PostgreSQL, AWS DevOps tools: Kubernetes, Docker,Terraform, Jenkins Very strong software engineering principles Enthusiasm for startup environment and cross-functional teams Passion for automation ...

Data Engineer (Football Club)

Hiring Organisation
Singular Recruitment
Location
London Area, United Kingdom
Composer or Vertex Pipelines. Domain Knowledge: Understanding of sports-specific data types ( event, tracking, scouting, video ) API Development: Experience building data-centric APIs using FastAPI , especially in serverless environments (e.g., Google App Engine) Streaming Data: Familiarity with real-time data pipelines and data ingestion at scale DevOps/MLOps: Exposure ...