26 to 50 of 91 Permanent FastAPI Jobs

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 ...

Software Engineer (Frontend)

Hiring Organisation
Orchestra
Location
City of London, London, United Kingdom
challenges regularly We're united by our mission, focused execution, and speed We deploy to production multiple times a day 🛠️ Tech Stack Backend: Python (FastAPI) + Typescript (express) Frontend: React + Typescript Infrastructure: AWS (serverless!), terraform Containerisation: Docker Database: PostgreSQL + DynamoDB CI/CD: GitHub actions + Blacksmith runners ...

Senior Python Developer

Hiring Organisation
Randstad Technologies Recruitment
Location
Dublin, City of Dublin, Republic of Ireland
Employment Type
Permanent
Salary
£70000 - £72000/annum Negotiable
years of professional experience. You must have "under-the-hood" knowledge of Python, specifically for building high-throughput microservices and complex data pipelines using FastAPI, Pandas, and NumPy . The RAG & Agentic Expert: This is the "Critical" requirement. Our client needs someone with deep hands-on experience building Retrieval-Augmented ...

Founding Staff Engineer

Hiring Organisation
Egregious
Location
London, England, United Kingdom
highly collaborative team to lead engineering efforts that shape the success of the platform. Qualifications Backend Mastery: Expert-level Python with deep experience in FastAPI and asyncio for building high-concurrency, non-blocking systems. Cloud Native Infrastructure: Proven track record of deploying and scaling systems using Kubernetes , Docker , and Kafka ...

Data Engineer

Hiring Organisation
Above & Beyond - Climate Tech Recruitment
Location
City of London, London, United Kingdom
data engineering service providers for deep domain work like concept modelling or high-volume data integration. Tech stack: Languages: python (pandas, httpx, sdmx, pydantic, FastAPI, FastMCP, ADK), SQL (ISO Graph Query Language would be a plus) Cloud: Google Cloud Platform (Cloud Run, Cloud Build, BigQuery, Spanner Graph, Cloud SQL, Cloud ...

AI Consultant

Hiring Organisation
Stealth IT Consulting Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£70,000
products in production - Curiosity, creativity, and a drive to unlock real business value with AI Tech my client works with: Python, React/Next.js, FastAPI/Django, Azure/GCP, OpenAI, LangChain, CrewAI, and more. If you want to push the boundaries of AI in consulting, this is your place ...

Python Developer

Hiring Organisation
Thyme
Location
City of London, London, United Kingdom
field) 1-2+ years of relevant work experience using Python and related tech stack in a professional environment Any of the following: Django, FastAPI, PostgreSQL, Kafka, AWS, Kubernetes experience and knowledge Experience in a Fintech or Financial services organisation is a nice to have, but not essential Clear communication ...

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 ...

Senior Software Engineer

Hiring Organisation
Thyme
Location
London Area, United Kingdom
degree in Computer Science (or related field) 4+ years of relevant work experience using Python and related tech stack in a professional environment Django, FastAPI, PostgreSQL, Kafka, AWS, Kubernetes experience and knowledge Experience in a Fintech or Financial services organisation is a nice to have Clear communication skills, both written ...

Senior AI Engineer - Market Intelligence

Hiring Organisation
Harnham
Location
United Kingdom
knowledge retrieval and reasoning • Build agentic AI workflows using frameworks such as LangChain or similar • Develop LLM microservices using Python frameworks such as FastAPI or Flask • Build internal AI tools including chatbots, automation systems, and workflow assistants • Deploy AI services on AWS infrastructure and manage reliability and monitoring • Work with ...

GenAI Engineer - Global Beauty Brand

Hiring Organisation
Harnham
Location
City of London, London, United Kingdom
teams Key Details • Salary: up to £85k + 10% bonus • Working model: Hybrid London (2–3 days in office) • Tech stack: Python, GCP (preferred), FastAPI, LangChain/LangGraph, CI/CD • Visa sponsorship: Not available Interested? Please apply below. ...

Founding Engineer

Hiring Organisation
Omnam Investment Group
Location
City of London, London, United Kingdom
ability to execute independently in a fast-moving environment Skillset We Value Proficiency in Python, Typescript, or similar modern languages Experience with backend frameworks (FastAPI, Django, Node.js, Rails, etc.) Strong SQL, data modeling, and database design knowledge Familiarity with IaC, containers, CI/CD, and observability tools Bonus : experience ...

Software Engineer

Hiring Organisation
Diamond Light Source
Location
Didcot, Oxfordshire, South East, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£50,000
with GraphQL, OpenAPi spec, JSON Schema & SQL/No SQL databases. Familiarity with MonoRepo project structures (TurboRepo) Development of APIs with Python Frameworks e.g. FastAPI Benefits Diamond offers an exceptional benefits package to support staff in achieving a positive work/life balance. This includes 26 days annual leave plus ...

Python Developer

Hiring Organisation
Yolk Recruitment Limited
Location
Bristol, Avon, South West, United Kingdom
Employment Type
Permanent
Salary
£50,000
Head of Engineering on platform improvements Take ownership of problems and contribute across different areas of the product as needed Tech Stack Python FastAPI Docker/containerisation AWS Linux About You Around 2-4 years of software engineering experience Strong Python development skills Experience building APIs or backend services Comfortable ...

Senior Founding Engineer

Hiring Organisation
Corecom Consulting
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
tooling, and internal platforms Working closely with founders and customers to shape the product direction Tech Stack Frontend: React, React Native, TypeScript Backend: Python, FastAPI, PostgreSQL Infrastructure: GCP, Terraform, Airflow AI: LLM integrations and AI-driven automation What They're Looking For Experience as a Full-Stack Engineer building production ...

Founding AI Engineer

Hiring Organisation
Richard Wheeler Associates
Location
East London, London, United Kingdom
Employment Type
Permanent
Rapidly prototype MVPs, validate value with the investment team, and harden the most impactful tools into reliable internal products Build simple internal interfaces using FastAPI, Streamlit, or Next.js to enable intuitive adoption Implement evaluation, observability, and governance to ensure accuracy, reliability, security, and responsible use of AI systems Guide ...

Backend Engineer (Python, FastAPI/Flask/Django/GPU/CUDA)

Hiring Organisation
Adecco
Location
Bristol, Avon, England, United Kingdom
Employment Type
Full-Time
Salary
£55,000 - £70,000 per annum
Backend Engineer (Python, FastAPI/Flask/DjangoGPU/CUDA) Bristol (Hybrid) £55,000 - £70,000 + Benefits PermanentThe OpportunityAn innovative analytics organisation operating within the insurance and risk sector is looking for a Backend Engineer to join their growing technology team in Bristol.This company builds advanced underwriting and risk … pipelines, design robust APIs, and ensure systems are reliable, performant, and production-ready.Key ResponsibilitiesDevelop and maintain backend services in Python using modern frameworks (e.g. FastAPI)Design and implement REST APIs for internal platforms and third-party integrationsCollaborate with scientists to support a GPU-accelerated risk modelling engineOptimise backend services ...

Software Engineer (Python/React)

Hiring Organisation
Oliver Bernard
Location
London Area, United Kingdom
Salary: £50,000 - £85,000 + meaningful equity 🏙️ Location : London, flexible working arrangements, ideally 1/2 days in office 💻 Tech Stack : Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite engineering team within the AI space. The platform is being used ...

Full Stack Engineer

Hiring Organisation
Oliver Bernard
Location
City of London, London, United Kingdom
Salary: £60,000 - £85,000 + meaningful equity 🏙️ Location : London, flexible working arrangements, ideally 2/3 days in office 💻 Tech Stack : Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite engineering team within the AI space. The platform is being used ...

Python Software Engineer / Senior Software Engineer - Quantum

Hiring Organisation
ARCA Resourcing Ltd
Location
Oxford, Oxfordshire, England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
algorithms Familiarity with Rust, C++, or other compiled languages Experience with databases and data pipelines (SQL, PostgreSQL, timeseries data, ETL) Backend development experience (e.g., FastAPI, SQLAlchemy) Experience in image analysis or real-time object detection Experience bridging theoretical models with experimental quantum hardware If you are interested in applying cutting ...

Green Tech / Energy Tech Start-Up | Full Stack Engineer | LDN 2 Days Per Week | £50K - £120K + Healthy Equity

Hiring Organisation
Owen Thomas | Pending B Corp™
Location
London Area, United Kingdom
apps for installers on the move Tech Stack: -> React, TypeScript, Konva, Tailwind -> Node.js, PostGREST, Prisma -> PostgreSQL/PostGIS, Docker, Atlas -> (Sunsetting Python + FastAPI) Requirements for Carbon Emission/Green Tech Start-up | Full Stack Engineer | LDN 2 Days Per Week | £50K - £120K + Healthy Equity -> 2+ years commercial experience ...

Full Stack Engineer

Hiring Organisation
Omnis Partners
Location
London Area, United Kingdom
Mentor and unblock other engineers through pairing, coaching, and high-signal code reviews. Tech stack & experience: Frontend: TypeScript + React/Next.js. Backend: Python (FastAPI or similar), async/concurrency, API design, operational readiness. Databases: Postgres, data modeling, migrations, query optimization. SaaS authentication & permissions: OIDC/OAuth, JWT, RBAC/ ...

Applied AI Engineer

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£140,000 - £150,000 per annum
Role Build full-stack, production AI applications from first architecture through to customer-facing delivery. Develop backend, infrastructure, and frontend components using Python, FastAPI, React, TypeScript, and cloud platforms. Deploy GenAI and LLM-based systems, including evaluation, observability, and agent-based workflows. Operate in cross-functional pods embedded into portfolio ...

Senior Applied AI Engineer, Finance

Hiring Organisation
Richard Wheeler Associates
Location
Central London, London, United Kingdom
Employment Type
Permanent
Rapidly prototype MVPs, validate value with the investment team, and harden the most impactful tools into reliable internal products Build simple internal interfaces using FastAPI, Streamlit, or Next.js to enable intuitive adoption Implement evaluation, observability, and governance to ensure accuracy, reliability, security, and responsible use of AI systems Guide ...

Forward Deployed Engineer

Hiring Organisation
Omnis Partners
Location
London Area, United Kingdom
systems Experience building or deploying AI/ML systems in real environments Familiarity with RAG architectures (chunking strategies, embeddings, retrieval, reranking) Backend development experience (FastAPI or similar frameworks) Comfort working with AWS infrastructure (e.g. ECS, S3, API Gateway, Secrets Manager) Engineers who enjoy working directly with customers and solving ambiguous ...