26 to 50 of 169 FastAPI Jobs in London

Python Developer

Hiring Organisation
NEEV LIMITED
Location
London, United Kingdom
Employment Type
Contract
building scalable, data-driven Note: Investment banking exp is required. Key Responsibilities Backend Development (Python) Build APIs and services using Python frameworks (Flask, FastAPI, Django). Integrate with Databricks SQL endpoints for data access. Ensure performance, scalability, and security of backend systems. Databricks & Data Engineering Develop ETL pipelines and workflows ...

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 ...

Senior Software Engineer - Agentic Workflows

Hiring Organisation
Causaly
Location
London, UK
Employment Type
Full-time
up. Preferred Qualifications Durable execution or workflow engines (Restate, Temporal, Inngest), or a comparable system you have built yourself. Python and LLM application frameworks (FastAPI, LangChain, LangGraph). Our GenAI service is written in Python and you will work in it. Observability and LLM instrumentation (OpenTelemetry, Langfuse). Multi-tenant ...

AI Consulting –Sr. AI Architect & Client Partner

Location
Greater London, England, United Kingdom
field. Master’s preferred. Skills and Personal attributes we would like to have: Core Knowledge Expected Programming & engineering : expert Python; REST APIs and microservices; FastAPI; distributed systems; cloud-native architecture. LLM application delivery: prompt engineering, tool and function calling, RAG, and at least one production Agentic AI system. Cloud ...

Staff Frontend Engineer

Location
Greater London, England, United Kingdom
experience integrating frontends with REST or GraphQL APIs, with a strong understanding of service-oriented architecture, data modeling, and Python web frameworks (e.g., FastAPI, Flask, Django). Practical experience with database data flows (e.g., PostgreSQL), cloud/container infrastructure (Docker, Kubernetes), and frontend observability tools (Sentry, Datadog, OpenTelemetry). Strong ...

FullStack Developer

Hiring Organisation
DNS Info Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £450/day
best coding practices. Work within Agile/Scrum development environments. Troubleshoot and resolve production issues. Required Skills Backend Strong experience with Python Experience with FastAPI , Flask , or Django REST API and Microservices development Object-Oriented Programming (OOP) SQL and database design Frontend Strong knowledge of React.js JavaScript (ES6+), TypeScript HTML5 … skills. Experience working in enterprise-scale environments. Ability to work independently and in cross-functional teams. Exposure to Agile delivery methodologies. Keywords: Python, React.js, FastAPI, Flask, Django, TypeScript, AWS, Azure, Docker, Kubernetes, CI/CD, PostgreSQL, Microservices, REST APIs. ...

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 ...

Founding Software Engineer Python - Start-up

Hiring Organisation
Client Server
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
build software from scratch and iterate quickly You have strong technical skills, primarily with Python You have experience with RESTful APIs (they use FastAPI); TypeScript, React and other web technologies such as HTML5, CSS3 would be of benefit You have experience with LLMs and agentic AI, like to get your ...

Senior Machine Learning Engineer

Location
City Of London, England, United Kingdom
Deployment: Manage deployment topologies across multi-cloud environments and bare-metal local hardware. API Development: Create high-performance, asynchronous REST and WebSocket APIs using FastAPI to serve real-time conversational agents. MLOps & Infrastructure CI/CD Automation: Design automated machine learning pipelines for model testing, versioning, and continuous deployment. Containerization ...

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 ...

Applied AI Engineer London

Location
Greater London, England, United Kingdom
from frontend interfaces to backend APIs, databases, and deployment pipelines. Key Responsibilities 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 ...

Machine Learning Engineer - Conversational AI & MLOps

Hiring Organisation
Robert Walters
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £90,000 per annum
Automatic Speech Recognition (ASR), Text-to-Speech (TTS), LLM and Small Language Model (SLM) pipelines. Building high-performance asynchronous REST and WebSocket APIs using FastAPI to support real-time conversational AI applications. Deploying machine learning workloads across AWS, Azure, GCP and on-premise/bare-metal infrastructure . Designing automated ...

Software Engineer — Staff / Senior

Location
Greater London, England, United Kingdom
strong backend engineers who've built production systems with any robust framework — Java/Spring Boot, Go, Kotlin, C#/.NET, Python (Django/FastAPI) or Ruby on Rails — and can ramp into TypeScript fast. We care that you've built and operated real backends, not which language ...

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 ...

Staff Engineer

Location
Greater London, England, United Kingdom
responsibility for a codebase and keeping it healthy - from shipping features to debugging issues. Specific requirements : Backend experience with Node.js and/or Python (FastAPI, Flask) Experience with front end frameworks (React, Next.js, Typescript). Exposure to cross platform frameworks a plus (e.g. React Native). Experience deploying and operating ...

Full Stack Engineer (Investment Platform)

Location
Greater London, England, United Kingdom
support internal business processes and workflows. Proficiency in front end app development (React/JavaScript or similar) and web framework (Flask/Django/FastAPI) Highly capable in data pipelining using tools like Airflow & DBT, and data extraction, manipulation and reporting using Python & SQL. Experience with code versioning, optimisation ...

Senior Engineer

Location
Greater London, England, United Kingdom
excited about using technology to improve healthcare, particularly for women and families. Specific Requirements Backend experience with Node.js and/or Python (FastAPI, Flask) Experience with front end frameworks (React, Next.js, Vue). Exposure to cross platform frameworks a plus (e.g. React Native). Experience deploying and operating systems ...

Data Decisioning Manager

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 ...

Manager, Senior Platform Software Engineer

Hiring Organisation
Baringa
Location
London, UK
Employment Type
Full-time
have worked across the technology stack with experience of established frameworks (e.g. React/Angular/Vue/Blazor frontends and/or FastAPI/Spring Boot/.NET backends) You have experience building and supporting different architectural approaches and are confident in justifying your technology and architectural choices. ...

Data Decisioning Manager

Hiring Organisation
Hackajob Ltd
Location
London, United Kingdom
Employment Type
Permanent
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 ...

Agentic AI Software Engineer

Hiring Organisation
Adecco
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
generation AI platforms, cloud native infrastructure, and intelligent agent based applications that support cutting edge scientific research. Key Skills & Experience Strong Python development experience FastAPI and backend API development Cloud platforms (GCP and/or Azure) Kubernetes, Docker, and cloud-native architectures CI/CD, Infrastructure as Code, and DevOps ...

ai engineer for agentic applications

Location
Greater London, England, United Kingdom
with knowledge of object-oriented design, clean code, SOLID, design patterns, modularity, and testability; Strong backend and API engineering experience, ideally with Python and FastAPI or similar; Hands-on experience building and operating solutions in AWS; Proficiency with Docker, GitHub, and CI/CD pipelines; Proven ability to work across ...

AI engineer with Agentic experience

Location
Greater London, England, United Kingdom
professional software development experience. Strong backend development experience with Python with a track record of clean, maintainable, testable production code. Production API design & delivery (FastAPI preferred), including versioning, documentation (OpenAPI/Swagger), and observability. Cloud experience (AWS preferred) beyond core compute/storage/DB—e.g., eventing, queues, serverless, logging ...

Applied AI ML Lead - LLM Suite Engineering

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 Software Engineer, SCRIBE

Location
Greater London, England, United Kingdom
looking for an experienced full-stack engineer with substantial experience developing Python web applications and backend services using frameworks such as FastAPI or Flask, alongside modern JavaScript or TypeScript frameworks such as React or Vue. You will be confident designing RESTful APIs and secure, scalable cloud infrastructure, ideally ...