1 to 25 of 161 Permanent FastAPI Jobs in London

AI Transformation Developer

Location
Greater London, England, United Kingdom
Python development experience, with 2+ years of AI/ML development Strong proficiency in Python and experience with frameworks such as Django, Flask, or FastAPI Experience with API development, integration, and web services in production environments Hands‐on experience integrating AI or ML models, LLM APIs, or automation frameworks into ...

Sr. Technical Lead / Architect

Location
Greater London, England, United Kingdom
professional experience in software engineering and technology, across relevant technical roles and responsibilities; Solid experience with Python and backend development using frameworks such as FastAPI, Flask, or Django; Experience designing and developing RESTful APIs; Good understanding of front-end development with React JS, JavaScript (ES6+), and TypeScript; intermediate knowledge ...

Senior Fullstack Engineer (Python + React.js)

Location
Greater London, England, United Kingdom
with a strong focus on building scalable, high-performance systems. Technical Skills: Python expertise, with hands‐on experience building backend services and APIs using FastAPI, Flask or similar. Experience in designing and developing end-to-end (E2E) tests to ensure smooth integration between backend and frontend components. A solid understanding ...

GenAI Full Stack Engineer - Consultant / Senior Consultant - Digital Excellence

Location
Greater London, England, United Kingdom
Security Check) Clearance or be eligible for such level of clearance.## **Technical Expertise*** **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 AI Engineer

Hiring Organisation
Aimtech Recruitment Ltd
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
environment. The role is Hybrid and requires onsite attendance in Central London 23 days per week. Technical Skills C#, ASP.NET Core, Entity Framework Python, FastAPI JavaScript, TypeScript React or Angular REST APIs, Swagger/OpenAPI SQL Server, PostgreSQL, NoSQL and vector databases Azure App Services, Azure Functions, API Management Docker ...

Principal Cloud Engineer (Terraform), London

Location
Greater London, England, United Kingdom
Lake/Apache Iceberg, and advanced SQL for large‐scale transformations. Microservices & APIs: experience building modular, production‐grade microservices and REST APIs using Python (FastAPI, Flask, or equivalent); understanding of service design principles including versioning, fault tolerance, and observability. Cloud platforms: working knowledge of cost and usage data schemas across ...

Global AI/ML Engineer Senior Manager

Hiring Organisation
The Boston Consulting Group
Location
London, UK
Employment Type
Full-time
tools (e.g. Github Actions, Gitlab CI) for automating deployments· Other AWS Managed Services (RDS, Batch, Lambda, Fargate, Step Functions, SQS/SNS, etc.)· FastAPI and NextJS experience (if we're still using the latter)· Websockets, Server-Side Events, Pub/Sub (RabbitMQ, Kafka, etc.)Who You'll Work With· Squad ...

Senior Python Developer - Quant Models AI Automation, Vice President

Location
Greater London, England, United Kingdom
related); Master's degree preferred. Professional software development experience, with deep expertise in Python and its data/engineering ecosystem (e.g., pandas, NumPy, FastAPI, orchestration tools). Proven track record of delivering production-grade automation, data pipelines, or testing frameworks in a complex enterprise environment; financial services experience strongly preferred. ...

Site Reliability Software Engineer (Hybrid)

Location
Greater London, England, United Kingdom
Services, Azure Functions, virtual machines, storage, networking, and monitoring Docker and Linux-based application hosting SQL Server, PostgreSQL, or SQLite IIS, Nginx, Flask, FastAPI, Django, Node.js, or similar web stacks Secure file transfer, API integrations, and healthcare system interfaces Monitoring, alerting, logging, and incident response platforms We offer an excellent ...

Senior Python Engineer (Full Stack)

Location
Greater London, England, United Kingdom
consider the following essential to the role: Solid experience with Python in a web application context. You have some experience with web frameworks like FastAPI, Django or Flask. We use FastAPI. Experience with Javascript/Typescript and a modern JS framework such as React, Angular or Vue.js. We generally ...

Senior Python Engineer

Hiring Organisation
INTEC SELECT LIMITED
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£450.00 per day
cloud engineering, and language assessment. Key Skills & Experience: Strong commercial Python development experience, including object-oriented and functional programming. Strong experience with FastAPI, Pydantic, SQLAlchemy, Alembic, Pytest, and type checking. Experience with Pandas, NumPy, Jupyter, OpenTelemetry, Git/GitHub, GitHub Actions, and Docker. Experience developing microservices and/or Lambda ...

Senior Software Engineer

Hiring Organisation
Hackajob Ltd
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
Design (SbD) frameworks. 2. Full-Stack Engineering (Web & APIs) 4+ years of production experience with modern Web stacks (TypeScript, React, Node.js, or Python/FastAPI). Strong API design experience (REST, GraphQL, gRPC, WebSocket) and relational/non-relational database design (PostgreSQL, SQLite). 3. Systems & Mobile Architecture (Android ...

Senior Engineer - Payments

Location
Greater London, England, United Kingdom
delivery. What You’ll Bring Track Record: 5+ years building high-performance, client-facing web applications. Backend Expertise: Deep hands-on experience with Python , FastAPI , PostgreSQL , Redis , and secure RESTful APIs. Frontend Proficiency: Mastery of TypeScript , React , Jest , and Storybook . (Experience with Micro-Frontends is a massive bonus). ...

Senior Full Stack Software Engineer

Location
Greater London, England, United Kingdom
technology stack consists of: React Native mobile applications React web applications GraphQL layer using Apollo Server and Apollo Client Python services running Flask and FastAPI Kubernetes based microservice architecture running on Google Cloud Platform Cloud Postgres and Google BigQuery datastores with DBT data transformations Google PubSub and MQTT messaging Terraform ...

Senior Engineer - PayE

Location
Greater London, England, United Kingdom
years of professional software development experience with a proven track record of building high-performance, client-facing web applications. Backend Stack: Proficient with Python, FastAPI, PostgreSQL, Redis , and designing secure REST APIs . Frontend Stack: Proficient with TypeScript, React, Jest , and Storybook . Experience with Micro Frontends (MFEs ...

Software Architect

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 Software Engineer - Backend

Hiring Organisation
Fitch Ratings
Location
London, UK
Employment Type
Full-time
technical engineers. Demonstrated experience delivering enterprise-scale software platforms, APIs, and distributed systems. Strong proficiency in C++, Java (Spring Boot), and/or Python (FastAPI or similar), with the ability to guide engineering teams on architecture, design, and implementation. Experience designing, building, and supporting RESTful APIs and microservices-based architectures. ...

Fullstack Developer

Location
City Of London, England, United Kingdom
backend-heavy role. Polyglot Proficiency: Strong commercial experience with Ruby (preferably Ruby on Rails) for web application development. Solid proficiency in Python (Django, FastAPI, or similar) with an understanding of data processing. Production experience or a strong foundational knowledge of Rust, particularly in building concurrent, memory-safe, and high-performance ...

Fullstack Developer

Hiring Organisation
Randstad Digital
Location
London, United Kingdom
Employment Type
Permanent
backend-heavy role. Polyglot Proficiency: Strong commercial experience with Ruby (preferably Ruby on Rails) for web application development. Solid proficiency in Python (Django, FastAPI, or similar) with an understanding of data processing. Production experience or a strong foundational knowledge of Rust , particularly in building concurrent, memory-safe, and high-performance ...

frontend developer for Physical AI

Location
Greater London, England, United Kingdom
complex datasets Experience integrating frontends with REST or GraphQL APIs Strong understanding of service-oriented architecture, data modeling, and Python web frameworks such as FastAPI, Flask, or Django Practical experience with PostgreSQL, Docker, Kubernetes, Sentry, Datadog, and OpenTelemetry Experience with unit, integration, and end-to-end testing, CI/ ...

Full Stack Developer

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
Experience of working in a Scrum Team and an Agile environment Design, build and support scalable and secure full-stack web applications using Python (FastAPI) Exposure to front-end development using React/Typescript. Support and enhance existing web applications to ensure stability and performance. Work with business and technical ...

Full Stack Engineer - Contract

Hiring Organisation
Morela Solutions
Location
London Area, United Kingdom
partners and turning what they need into something buildable. What You Will Need Python. Serious commercial experience building back end services, APIs and tooling. FastAPI, Django, Flask, whichever you have used in anger. TypeScript. Serious commercial experience on modern front ends with React, Vue or Angular. Linux. Properly comfortable without ...

Polyglot Engineer (JS/Python/Go)

Location
Greater London, England, United Kingdom
JavaScript/TypeScript, Python, and/or Go, with the ability to rapidly learn new languages; Experience with modern frameworks across the stack (FastAPI, Gin, Express, etc.); Production experience with React, modern build tools, state management, responsive design, and accessibility standards; Comprehensive testing experience (unit, integration, E2E, security) and performance ...

BXTI - Liquid Credit, Full Stack Software Engineer, Associate

Location
Greater London, England, United Kingdom
highly scalable microservices architecture deployed on a cloud-hosted containerized environment. Key technologies in our stack include C#, React/Angular, Typescript, FastAPI, Python, Terraform, SQL, AWS ECS, AWS Lambda, AWS DynamoDB , AWS SNS/SQS, CI/CD tooling (e.g., Gitlab Runners), and data warehouse solutions like Snowflake.**Qualifications ...

Full-Stack Developer & Development Team Lead

Location
Greater London, England, United Kingdom
authentication systems. Understanding of GDPR, accessibility, and secure software development. Experience integrating applications with AI/ML or LLM-based services. Familiarity with Python, FastAPI, or related technologies. Experience with vector databases, knowledge graphs, or AI application architectures. Experience mentoring developers and improving development standards and processes. Educational Requirements Bachelor ...