• United Kingdom Jobs Expertini profile avatar

    • 672,916+ Senior Python Engineer Fastapi Api Performance Jobs in UK — Top Companies Hiring June 2026

    Professional job seekers finding United Kingdom jobs through Expertini
    750,000+ professionals on Expertini 750,000+ Candidates
    Join our global community
    Explore Leading Employers
    High-Paying Careers
    Expertini Penguin Mascot Resume Score™
    Resume Score™ Instantly
    Upload Your CV
    Quick 30-second process

    Apply Today & Jumpstart Your Career on Expertini, Trusted Since 2008.

    1. Expertini
    2. United Kingdom
    3. Jobs
    4. Senior Python Engineer Fastapi Api Performance Jobs in United Kingdom

    5. Download PDF

    Reset

    Create Job Alert
      Add Alert

     
     
    Create Alert
     
    Reset

    Senior Python Engineer FastAPI & API Performance

    Barclays in Greater London is seeking a Python Developer to enhance Python web applications and optimize system performance. Responsibilities include delivering robust software solutions, collaborating with cross-functional teams, and ensuring code quality. Ideal candidates should have experience with ...

    Senior Python Engineer (Public API & FastAPI)

    Senior Python Engineer – Public API Compensation: Competitive + Stock-Options/BSPCE (local currency) Location: Remote with monthly Paris office visits (fully reimbursed). We can hire people already based in selected countries only: France, Germany, Ireland, Italy, Portugal, Spain, UK ...

    Senior Python Engineer: Public API with FastAPI (Remote)

    Photoroom is seeking a Senior Python Engineer focused on developing our public API. This remote role requires strong experience in backend systems and public API design. You’ll collaborate with cross-functional teams to ensure the API delivers value, while promoting reliability and performance. The pos ...

    Senior Software Engineer Python FastAPI

    Senior Software Engineer / Developer (Python FastAPI) London / WFH to ...

    Senior Software Engineer Python FastAPI

    Senior Software Engineer / Developer (Python FastAPI) London / WFH to £120kAre you a Senior Software Engineer with strong Python skills combined with Fintech / financial services experience?You could be progressing your career at a global, Fintech services company that has seen 30-40% yea ...

    Senior Software Engineer Python FastAPI

    Senior Software Engineer / Developer (Python FastAPI) London / WFH to £120kAre you a Senior Software Engineer with strong Python skills combined with Fintech / financial services experience?You could be progressing your career at a global, Fintech services company that has seen 30-40% yea ...

    Senior Software Engineer Python FastAPI

    Senior Software Engineer / Developer (Python FastAPI) London / WFH to ...

    Senior Backend Engineer — Python, FastAPI & Databricks

    Client Server Ltd. is seeking a Backend Software Engineer / Developer with expertise in Python and FastAPI. This role involves designing and developing backend services within a hybrid work model, emphasizing collaboration and strong technical skills. Competitive salary up to £95,000 along with benefit ...

    Senior Backend Engineer — Python, FastAPI, Azure

    TXP is seeking a Senior Backend Developer specializing in Python and Azure to join their team. This role involves hands-on development of backend services and APIs within a secure enterprise environment, with a focus on delivering reliable software solutions. The ideal candidate should have strong expe ...

    FastAPI Python Developer

    Stars Arena is seeking a highly skilled Python Developer located in Nottingham, United Kingdom. The ideal candidate should have a strong background in core software development principles, specifically with hands-on experience in FastAPI. This full-time role offers a competitive compensation package ranging from ...

    Senior Python AI Engineer (FastAPI) – Hybrid London

    A technology consulting firm is seeking a Senior Software Engineer skilled in Python (FastAPI) and SQL to lead the design and build of AI-driven applications. This role involves developing data pipelines, mentoring junior engineers, and maintaining high engineering standards. Exceptional communication skills and ...

    Senior Backend Engineer – Python & FastAPI, Hybrid London

    A leading technology startup is seeking a Back-End Engineer in London to build and maintain backend services using FastAPI and Python. This role requires strong skills in developing web applications, alongside a passion for engineering and functional programming. Candidates should have a Bachelor's degree in a r ...

    Senior AWS/Python Engineer (FastAPI) Remote Contract

    A recruitment agency is seeking an AWS Software Engineer for a 6-month fully remote contract role. The engineer will focus on building a FastAPI-based service for IAM and support the technical aspects of production systems. Ideal candidates have over 5 years of Python experience, familiarity with FastAPI and rob ...

    Hybrid Senior Python Engineer: FastAPI, Databricks & APIs

    A leading recruitment firm is seeking a Senior Support Consultant to join a Global Insurance Leader's expanding Python Engineering team. The ideal candidate will design and build high-performance APIs and enhance existing platforms. Strong proficiency in Python, SQL, FastAPI, and Databricks is required. This rol ...

    Senior Backend Engineer — Python Microservices (FastAPI) London

    A leading Insurtech company in London is seeking a motivated Senior Backend Engineer to build and scale their insurance platform. The role focuses on developing Python microservices using FastAPI and collaborating in a high-performing team. The ideal candidate has strong expertise in Python development, microser ...

    Senior AI Solutions Engineer Python, FastAPI, Azure

    A leading legal and professional services group in Birmingham is seeking an experienced AI Developer to design and deploy AI-powered applications. The role involves building scalable AI services using Python, FastAPI, and LLM APIs, along with deployment in Azure. The ideal candidate should have strong skills in ...

    Senior AI Driven SDLC Engineer (Python/FastAPI)

    ClearRoute is seeking a hands-on technical lead in Greater London to deliver production-quality Python/FastAPI services on an agile platform. You will work directly with the chief architect and lead by example, owning contributions from development to production. The ideal candidate has strong experien ...

    Senior Python Backend Engineer – Climate Tech (FastAPI)

    Victrays is seeking a highly motivated Backend Python Engineer to scale our product and infrastructure. This role involves designing robust backend services and collaborating with engineers to deliver quality customer experiences. The ideal candidate has 4+ years of experience, strong knowledge of Pyth ...

    Senior Python AI Engineer (FastAPI) – Hybrid London

    A technology consulting firm is seeking a Senior Software Engineer skilled in Python (FastAPI) and SQL to lead the design and build of AI-driven applications. This role involves developing data pipelines, mentoring junior engineers, and maintaining high engineering standards. Exceptional communication skills and ...

    Senior Python Developer: FastAPI & Azure Microservices

    A leading staffing agency is seeking a Senior Python Developer with a focus on FastAPI for a premier energy client in London. This mid-senior level contract position involves designing and deploying scalable backend services, collaborating with cross-functional teams, and developing high-performance APIs. The ro ...

    Senior Python Developer FastAPI Start up

    Senior Python Developer / Software Engineer (Python FastAPI Django) London to £120k Would you like to progress your career in a senior, hands‑on role at an early stage AI start‑up within the beauty space? As a Senior Python Developer you'll focus on building backend services and FastAPIs ...

    Backend Engineer (Python) — FastAPI, Cloud & MongoDB

    A London-based fashion-tech platform is seeking a backend software engineer to develop RESTful APIs and internal tools. The ideal candidate will have 2+ years of Python experience, particularly with FastAPI and MongoDB, and an enthusiasm for working in a fast-paced start-up environment. This hybrid role requires ...

    Python AI Backend Engineer (FastAPI + Snowflake)

    Global is seeking a mid-level AI Engineer specializing in Python for their Global:IQ team in Greater London. This role involves backend engineering to develop scalable systems integral to their new intelligence platform, which harnesses data science and AI methodologies. Successful candidates will requ ...

    Backend Software Engineer Python FastAPI SQL

    London, Greater London | £85k - £95k per year Backend Software Engineer / Developer (Python FastAPI SQL Databricks) London to £95k Are you a data centric Backend Software Engineer with strong Python, SQL and FastAPI skills? You could be progressing your career in a senior, ...

    Backend Software Engineer Python FastAPI SQL

    Backend Software Engineer / Developer (Python FastAPI SQL Databricks) London to £95kAre you a data centric Backend Software Engineer with strong Python, SQL and FastAPI skills?You could be progressing your career in a senior, hands-on role at a fast growing, global Insurance Underwriting ...

    Remote Senior Python Engineer — FastAPI for RL Gym

    A leading AI research accelerator is seeking a Python Developer with strong FastAPI expertise to join a Reinforcement Learning project. The role involves designing scalable APIs, collaborating with engineers, and delivering backend services for experiments. Ideal candidates have over 5 years of Python experience ...

    Senior Python Backend Engineer – FastAPI, AWS, Hybrid (London)

    Client Server is seeking a Senior Python Developer/Software Engineer to join their London office in a hands-on role. The successful candidate will build backend services and FastAPIs using Python, as well as integrate LLMs and payment systems. You'll collaborate with a talented team while enjoying flexibility ...

    Senior Python Engineer Cloud API & Leadership

    A leading consulting firm is seeking a Senior Python Engineer based in Greater London to design and develop scalable software solutions. The role requires strong expertise in Python frameworks and cloud environments, especially AWS, Azure, or GCP. Responsibilities include mentoring staff and leading technical di ...

    Senior Python Backend Architect FastAPI, AWS, Postgres

    Oliver Bernard is partnering with a high-growth Data Intelligence Platform start-up to hire a Senior Engineer in Central London. The ideal candidate will have strong Python skills and experience in backend development, with a focus on performance and quality. This role requires a minimum of 5 years in ...

    Senior Python Backend Architect FastAPI, AWS, Postgres

    Oliver Bernard is partnering with a high-growth Data Intelligence Platform start-up to hire a Senior Engineer in Central London. The ideal candidate will have strong Python skills and experience in backend development, with a focus on performance and quality. This role requires a minimum of 5 years in ...

    Remote AI Driven Python Backend Engineer (FastAPI)

    Digital Waffle is seeking a Back End Engineer based in the UK to build next-generation applications using Python and FastAPI. The role emphasizes collaboration in a fast-paced environment with a focus on AI-assisted development workflows. Candidates are expected to have strong commercial experience wit ...

    Remote Full Stack Engineer (Python, FastAPI, Django)

    A leading software house in Cambridge is seeking software professionals to join their team. You will work on technically challenging projects in a friendly environment that promotes a good work/life balance. The role offers the chance to work with Python frameworks like Pyramid, Django, Flask, and FastAPI in an ...

    Senior Python Developer (Fast API)

    Insight Global are seeking a highly motivated Senior Python Developer (Fast API Focused) for one of their premier energy clients in London. This role will be for a 12‑month extended contract (Inside IR35) , based 3 days a week onsite in London, 2 days remote . Overview of Day ...

    Senior Python & API Systems Integrator

    Stars Arena is looking for a Systems Integration Engineer with strong expertise in Python and SQL to join their team in London. The ideal candidate will have over 3 years of experience in system integration across multiple platforms, proficiency in RESTful API development, and familiarity with CI/CD processes. T ...

    Python Automation Engineer — API & Kubernetes

    A technology solutions provider in the UK is looking for a Python developer to build scalable automation solutions for database operations. The ideal candidate should have experience with API development, particularly using FastAPI, and be proficient in Docker and Kubernetes. Responsibilities include troubleshoo ...

    Senior Python Software Engineer Data & API Platforms

    A leading insurance company in the UK is seeking a Senior Software Engineer to enhance their Cyber Data Services. You will play a key role in developing data capabilities, building robust APIs, and improving data quality indicators. The ideal candidate has over 4 years of experience in Python and SQL, with a str ...

    Senior Software Engineer Python & C# | Semantic API

    慨正橡扯 is looking for a Software Engineer III with expertise in Python and C#. In this role, you'll build advanced systems and maintain APIs while ensuring coding best practices. Ideal candidates will have strong knowledge in Agile methodologies, secure coding practices, and experience with data query la ...

    Senior Python Backend Engineer — API & AWS (Contract)

    Arrows is seeking a Senior Software Engineer with a strong background in Python for a 6-month contract in Greater London. The role requires ownership of backend features and services, with opportunities to work closely with a permanent engineering team. Ideal candidates should excel in fast-paced envir ...

    Senior Python Engineer Cloud, API Design & React

    Tech 4 is a fast-growing technology consultancy in Newcastle upon Tyne looking for a Senior Python Developer to design, implement, and maintain complex software and customer-facing digital products. This office-based role offers an excellent opportunity to make a significant impact on challenging projects. </ ...

    Senior Backend Engineer Orchestration for Autonomous Tech

    Jack & Jill is seeking a Senior Backend Engineer to join their innovative team, aimed at building a orchestration platform for autonomous technology deployment. This role requires significant experience with API design and backend systems, particularly in Python and FastAPI. You will have the opportunity to shap ...

    Python Developer — Enterprise Apps (FastAPI, Kubernetes)

    Citi in Belfast is seeking an Applications Development Intermediate Programmer Analyst responsible for contributing to application systems analysis and programming activities. The ideal candidate will have hands-on experience in Python and FastAPI, working within an enterprise-scale environment. Key re ...

    Remote Backend Engineer for AI HealthTech | Python & FastAPI

    A leading HealthTech company in the UK is seeking a Software Engineer to design and build production-grade backend systems using Python and FastAPI. This role offers fully remote working with optional office space in Holborn. You'll contribute to high-impact projects in AI-driven healthcare, work alongside engin ...

    Backend Python Engineer — AI Driven, FastAPI, Hybrid London

    Job title: Software Engineer Client: Not specified Salary: £120,000 per annum + Benefits Location: London (Hybrid / Flexible Working) The Role We’re supporting a rapidly growin ...

    Python Cloud Engineer – AWS, Terraform, FastAPI | Hybrid UK

    A premier technology recruitment agency is seeking an experienced Python Engineer for a contract role in the United Kingdom. This position entails designing cloud-native applications and optimizing CI/CD pipelines using Python, AWS, and Terraform. Candidates should have a proven track record of at least 5 years ...

    Public Sector Python Backend Engineer | AWS, Django/FastAPI

    Brio Digital in Leeds is seeking experienced Python Developers to develop and maintain scalable applications that enhance public services. Join a talented team in an Agile environment collaborating with designers and data specialists. Your role involves backend development using Python frameworks, mana ...

    Back End Developer

    Senior Backend Engineer Fully Remote 6 months initially We’re seeking a Senior Backend Engineer to lead the design and implementation of core backend services for an Azure-based SaaS platform. Apply here and help define the future of intelligent document au ...

    Senior Backend Engineer Python + AWS Lead API & Services

    Santa Monica Talent is seeking a Lead Engineer (Backend Python AWS) to drive the development of a healthcare platform. This hands-on role involves designing and building backend services while collaborating closely with the CTO. Responsibilities include ensuring API documentation, integrating with thir ...

    Senior Software Engineer Health Tech (Hybrid, Python/API)

    A recruitment firm in Cambridge is hiring a Senior Software Engineer to develop cutting-edge health technology. The role requires strong Python skills, particularly in API development. Responsibilities include writing scalable code and building robust APIs, while working in a collaborative culture that encourage ...

    Senior Software Engineer SC Cleared | Python & AWS API

    Senior Software Engineer- 12 Months - SC Cleared - £625pd Rate : £625 per dayDuration : 12 monthsIR35 : InsideLocation : Remote - 1 day per week in ExeterThe role :A leading G ...

    Senior Python ML Engineer for Automation & API Solutions

    Orion Innovation is seeking a Senior Python ML Engineer in Greater London to focus on automation and develop a backup application solution. The role involves collaboration with teams to assess system functionality and future improvements. Ideal candidates must demonstrate strong programming skills in P ...

    🚀 Boost Your Hiring Chances with Our AI-Powered Tool-Kit

    Stand out from thousands of applicants. Use our proven career tools to optimize your applications and land your dream job faster.

    To-Do Planner

    Organize your job search and personal tasks. All data is confidential.

    Open Planner →

    Wellbeing Center

    Access your confidential wellness report and resources to manage job search stress.

    Check Wellbeing →

    Skill Coach

    Plan your skill development with O*NET support to stay competitive in your field.

    Start Coaching →

    Outfit Helper

    Get AI-powered suggestions on what to wear for your next interview.

    Find Outfit →

    Income Tax Calculator

    Plan your finances with our calculator, updated for 2025 tax regulations.

    Calculate Tax →

    Salary Benchmark

    Get accurate, AI-supported salary trends to know your worth and negotiate better.

    Check Salaries →

    Interview Practice

    Practice for any interview with AI-enabled Q&A sessions. All data is private.

    Start Practicing →

    Interview Predictor

    Use our AI-supported tool to predict potential interview questions based on your resume.

    Predict Questions →

    Interview Practice Timer

    Use our mock interview trainer to perfect your answers under timed conditions.

    Start Timer →

    Behavioral Mastery

    Ace tricky behavioral interviews with our AI-powered practice module.

    Master Answers →

    Question Journal

    Confidentially record interview questions you were asked for future reference.

    Open Journal →

    Interview Ace

    A comprehensive tool to help you master every aspect of your interviews.

    Become an Ace →

    Q&A Logs

    Confidentially track your answers to common questions and refine them over time.

    View Logs →

    Application Planner

    Schedule and organize your job applications in one confidential planner.

    Open Planner →

    Cover Letter Tool

    Create perfect, tailored cover letters for each application with AI support.

    Generate Letter →

    Resume Score

    Get instant feedback on your resume with our NLP-supported analysis tool.

    Check My Score →

    ATS Score

    Check your resume's compatibility with Applicant Tracking Systems (ATS).

    Check ATS Score →

    Application Analyzer

    Use AI to analyze job descriptions and optimize your application materials.

    Analyze Application →

    Career Visualizer

    Confidentially plan and visualize your long-term career path and goals.

    Visualize My Career →

    Offer Genius

    Get intelligent insights and strategies to confidently negotiate job offers.

    Negotiate Offers →

    JobFlow

    Track your entire job search progress from application to offer with this intelligent tool.

    Track My Flow →

    JobSense

    Our intelligent matching engine that provides smart job recommendations.

    Get Smart Matches →

    Networking Toolkit

    Tools to build and manage your professional connections. All data is confidential.

    Build Network →

    Professional CV

    A classic, O*NET supported template for corporate and professional roles.

    Use This Template →

    Executive CV

    A premium, O*NET supported template designed for senior and C-level positions.

    Use This Template →

    Modern CV

    A fresh, stylish, O*NET supported template perfect for tech and modern industries.

    Use This Template →

    Creative CV

    A visually distinct, O*NET supported template for design and artistic roles.

    Use This Template →

    Minimalist CV

    A clean, simple, O*NET supported template that focuses purely on content.

    Use This Template →

    Europass CV

    The standard European Union recommended format for wide compatibility.

    Use This Template →

    Student CV

    An institution-recommended template perfect for internships and first jobs.

    Use This Template →

    Graduate CV

    An institution-recommended template for recent graduates entering the workforce.

    Use This Template →

    Academic CV

    The researcher-recommended format for roles in academia and research.

    Use This Template →

    Developer/IT CV

    A tech-savvy recommended template to highlight your technical skills.

    Use This Template →

    Skilled Worker CV

    A trades-recommended template to showcase hands-on skills and experience.

    Use This Template →

    Monochrome CV

    A sleek, black-and-white, O*NET supported template for a professional look.

    Use This Template →

    Art CV

    An artist-recommended template that allows your creativity to shine.

    Use This Template →

    Harvard CV

    A researcher-recommended template based on the classic Harvard format.

    Use This Template →

    Volunteer Research

    Help us improve our platform by joining our community research program.

    Join Research →

    Review Us

    Share your experience with our tools to help other job seekers.

    Share Experience →

    Register

    Create your free account to save jobs, build your profile, and track applications.

    Create Account →

    Login

    Access your dashboard, manage applications, and continue your job search.

    Access Your Account →

    Profile Builder

    Create a comprehensive professional profile that attracts recruiters and showcases your skills.

    Build Your Profile →

    View Profile

    See your public profile exactly as employers will see it. Make sure it's perfect.

    Preview Profile →

    Bookmarked Jobs

    Keep track of all your saved job opportunities in one organized place.

    View Saved Jobs →

    Your Reviews

    View and manage all the company reviews you've submitted.

    See Your Reviews →

    Following

    Manage the list of companies you follow to stay updated on their new openings.

    Manage Following →

    Find Companies

    Discover and research top employers in your country and industry.

    Discover Employers →

    Standalone CV Builder

    Use our O*NET supported CV builder to create a professional resume from scratch.

    Build Your CV →

    PDF to DOC (Beta)

    Convert your PDF resumes or documents into editable Word (DOC) format.

    Convert PDF →

    DOC to PDF (Beta)

    Create universally compatible PDF documents from your Word (DOC) files.

    Create PDF →

    General FAQ

    Find answers to common questions about our job site and platform.

    Read FAQ →

    Job Seekers FAQ

    Get help and find answers to questions specifically for job seekers.

    Get Help →

    Job Matching

    Learn about the technology and algorithms behind how we match you to jobs.

    Learn How →

    Personalized Matching

    Discover how we use your profile and activity to provide customized job suggestions.

    Learn More →

    Quick Apply

    Understand our fast application process and how to make the most of it.

    Learn More →

    Alert Frequency

    Learn how to manage your job alert settings so you get the updates you want.

    Manage Settings →

    Job Alerts Guide

    A complete guide to understanding how job alerts work and how to use them effectively.

    Read Guide →

    Resume Matching

    Learn how our system matches your resume to job requirements.

    Learn More →

    Ethical Branding

    Read our guide to building a professional and ethical personal brand.

    Read Guide →

    Candidate Visibility

    Learn how to increase your visibility to recruiters on our platform.

    Increase Visibility →

    Verified Badge

    Find out how you can get a verified badge to build trust with employers.

    Get Verified →

    AI ATS Technology

    Learn about the advanced AI and ATS technology that powers our platform.

    Learn More →

    ATS Ranking

    Understand how Applicant Tracking Systems rank you as an applicant.

    Learn More →

    Semantic Matching

    Learn how our AI-powered semantic matching goes beyond keywords.

    Learn More →

    💡 Tools that really enhance your application chances and career growth.

    Go to Your Dashboard →

      Senior Python Engineer Fastapi Api Performance Jobs in United Kingdom Job Search Guide, Trends and Insights