1 to 25 of 51 Permanent FastAPI Jobs in London

Senior Full Stack/Native Cloud Engineer (Vice President)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
another complex enterprise technology environment. Advanced backend engineering experience with Java 8+, Spring Boot, and microservices‐based architectures. Strong Python development experience, preferably with FastAPI or similar modern API frameworks. Proven experience designing and building cloud‐native, distributed, scalable, and resilient systems. Hands‐on experience with Kafka or similar event ...

Full-Stack AI Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
deployment pipelines. Design, develop, and maintain frontend applications using React and Next.js. Build, test, and deploy backend services and APIs (Python/Django/FastAPI preferred, but other languages/frameworks welcome). Collaborate with founders, growth team, designers, and other engineers to deliver high-impact features. Ensure scalability, performance ...

Software Architect

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
with Python and Django on a service-oriented architecture deployed at scale on Kubernetes. The rest of the tech stack includes Django REST Framework, FastAPI, PostgreSQL, AWS, React.js, Docker, Redis, Celery, Pandas, NumPy, Git, Jenkins, and Elasticsearch. We put significant emphasis on design patterns, code readability, automated testing, maintainability ...

Senior Full Stack Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
such as Kafka Expertise in database systems including Redis, Elasticsearch, Neo4j, and PostgreSQL Proficiency in developing APIs using a backend framework (such as Django, FastAPI, Flask, or Express) Commercial experience in front-end development including at least one web development framework, preferably Vue.js Be comfortable with Unix systems Strong problem ...

Python Technical Lead FinTech

Hiring Organisation
Run-Time Group Ltd
Location
City of London, London, United Kingdom
Employment Type
Permanent
technical roadmap, guide architectural decisions, and ensure engineering excellence across backend services. Python Engineering Design and build robust, secure, and scalable microservices using Python (FastAPI, Django, Flask). System Architecture Lead the design of distributed systems, event-driven architectures, and high-availability platforms. Team Mentorship Coach engineers, conduct code reviews ...

BXTI - Liquid Credit, Full Stack Software Engineer, Associate

Hiring Organisation
Jobleads-UK
Location
City of Westminster, England, United Kingdom
order, execution, trade processing) to support LCS, which manages $114B in AUM across diverse fixed‐income portfolios. Key Technologies C#, React/Angular, Typescript, FastAPI, Python, Terraform, SQL, AWS ECS, AWS Lambda, AWS DynamoDB, AWS SNS/SQS, CI/CD (GitLab Runners), Snowflake. Responsibilities Use cloud‐native technologies ...

Principal Software Engineer (Back-End)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Head of Platform. Responsibilities Back-end development & architecture Design, develop, and maintain scalable back-end services and APIs using Python and modern frameworks (FastAPI). Design and build high-performance API endpoints to handle complex hierarchical data queries and multi-dimensional aggregations for grid modelling computations. Ensure system reliability, performance ...

Software Engineer (Applied AI)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
experience in a meaningful business domain. Contribute across the tech stack : You’ll work in React (JavaScript/TypeScript) on the frontend and Python (FastAPI, SQLAlchemy) on the backend, shipping production-ready code and user-facing features in addition to innovative ML work. Live on the cutting edge ...

Data Decisioning Manager

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Agentic AI frameworks - LangChain, LangGraph, AutoGen, or similar; building multi-step autonomous workflows Machine Learning - model development, training, evaluation, and deployment APIs & backend development - FastAPI, REST APIs, microservices architecture Vector databases & embeddings Cloud platforms - Azure GCP, or AWS; deploying and managing AI/ML workloads at scale Version control & MLOps ...

Lead Agentic AI Engineer

Hiring Organisation
Jobleads-UK
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 ...

Senior Consultant, Forward Deployed AI Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Track recordof delivering production Python services and APIs; working knowledge of cloud-native application patterns and release practices. Software Engineering Production-grade Python services (FastAPI, AWS Lambda, event-driven patterns) and front-end development with React/Next.js, Material UI and SWR. Cloud architecture design capability across major providers; rounded ...

Senior AI/ML Scientist

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
concepts including Neural Networks and Transformer-based architectures. Knowledge in developing and deploying scalable models on Databricks, Azure, and AWS, leveraging tools such as FastAPI and Docker. Proficient in model tracing and observability for LLM in production and implementing evaluation frameworks for model quality and reliability. Strong understanding of software ...

Applied AI ML Lead - LLM Suite Engineering

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Skills Computer science degree or equivalent practical experience Hands-on experience with system design, application development, testing, and operational stability Proficiency in Python (FastAPI) Experience building microservices and APIs Experience with elastic compute, NoSQL databases, and messaging queues Strong understanding of the Software Development Life Cycle Solid grasp ...

Senior Manager, Forward Deployed AI Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
record of delivering production Python services and APIs; working knowledge of cloud‐native application patterns and release practices. Software Engineering Production‐grade Python services (FastAPI, AWS Lambda, event‐driven patterns) and front‐end development with React/Next.js, Material UI and SWR. Cloud architecture design capability across major providers; rounded ...

Python Developer

Hiring Organisation
17918
Location
London, United Kingdom
role offers exposure to modern development practices, containerisation and CI/CD in a highly technical environment. Key Skills Python development Flask or FastAPI REST API development SQL & NoSQL databases Docker & Docker Compose Linux & Bash scripting Jenkins or GitLab CI/CD Git version control Automation frameworks Networking fundamentals (HTTP ...

Senior Backend Engineer (Outside IR35)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
mindset: high autonomy, a passion for greenfield engineering, and a track record of thriving in fast-moving startup environments. Familiarity with tools like PostgreSQL, FastAPI, Docker, and GCP/AWS will make you stand out immediately. If you are an experienced contractor ready to take full ownership of a greenfield ...

Senior AI Engineer Manager/Associate Director Capital Markets

Hiring Organisation
Datatech Analytics
Location
London, United Kingdom
Employment Type
Permanent
LangChain, LangGraph, Agent Development Kit or similar agent frameworks Experience with vector databases such as Pinecone, Chroma or similar API development experience, ideally with FastAPI or similar frameworks Knowledge of MLOps, LLMOps, CI/CD or production deployment practices Experience designing or supporting evaluation frameworks for AI or agentic systems ...

AI Platform engineer

Hiring Organisation
Nextech Group Limited
Location
East London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£85,000
model-serving infrastructure and prompt-caching strategies Drive API versioning and backwards compatibility as the product iterates quickly Core Tech Stack: Languages: Python (FastAPI), Go, TypeScript (Node.js) Databases: PostgreSQL, Redis, Pinecone/pgvector Infra: AWS (ECS, Lambda, SQS/SNS), Docker, Kubernetes, Terraform AI/ML tooling: LangChain/LlamaIndex ...

Python Developer

Hiring Organisation
McGregor Boyall Associates Limited
Location
London, United Kingdom
Employment Type
Permanent
developing automation systems for trade processing workflows, creating custom data visualization tools, and architecting web applications using Flask/Django/FastAPI stacks. You'll have autonomy to drive technical decisions while collaborating with C-suite stakeholders to solve complex financial data challenges. We need someone who understands ...

Senior Full Stack Software Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Interested in building software that directly impacts how businesses operate. Preferred Experience 5+ years of software engineering work experience. Experienced in Typescript, Python, React, FastAPI, Django, Flask, and AWS. Strong experience designing distributed systems and scalable applications. Experience owning production systems and making architectural decisions. Familiarity with cloud infrastructure, APIs ...

Backend Developer

Hiring Organisation
First Choice Staff
Location
Feltham, London, United Kingdom
Employment Type
Permanent
Salary
£40,000
covering architecture, processes, and code Essential Skills and Experience Solid proficiency in Python, JavaScript, and SQL Strong understanding of back-end frameworks (e.g. Flask, FastAPI, Node.js or similar) Experience working with cloud platforms (e.g. DigitalOcean, AWS, or Azure) Experience developing or maintaining RPA solutions Ability to work independently, managing ...

Digital Promotion Developer Freight

Hiring Organisation
Heathrow Personnel
Location
Hounslow, London, United Kingdom
Employment Type
Permanent
Salary
£40,000
systems, processes, and deployments. Essential Skills & Experience Strong commercial experience with Python, JavaScript, and SQL. Experience working with back-end frameworks such as Flask, FastAPI, Node.js, or similar. Hands-on experience with cloud platforms such as AWS, Azure, or DigitalOcean. Experience developing or supporting Robotic Process Automation (RPA) solutions. Strong ...

Senior Backend Engineer | AI Platform

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
teams to understand their needs and provide scalable platform solutions. Continuously improve developer experience and platform adoption across the organization. Tech Stack: Backend Python FastAPI Agent Development Kit (ADK) Datastores PostgreSQL BigQuery Firestore Infrastructure Google Cloud Platform (GCP) RabbitMQ Terraform Monitoring & Observability Grafana Prometheus Langfuse incident.io Sentry What to Expect ...

AI & ML Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
tooling, contributing ideas and recommendations for continuous improvement. Who you will work with Data and AI Team About you Strong Python engineering skills (FastAPI, testing, typing) and experience with cloud‐native development (GCP preferred). Hands‐on experience with GCP Vertex AI (model endpoints, pipelines, embeddings, vector search) or equivalent ...

Staff Back End Engineer - Finance Technology

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
hard problems, raising the bar in code review, and unblocking teammates day-to-day Bonus: Extensive experience with Python web frameworks (Django/FastAPI/Flask/Starlette/Ninja). A background in high-logic or high-scale fields like Fintech, Gaming, Healthcare Tech, Logistics, Security/Cryptography ...