Fastapi Python Developer Jobs in UK

Professional job seekers finding United Kingdom jobs through Expertini
750,000+ professionals on Expertini 750,000+ Candidates
Join our global community
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.

Reset

Create Job Alert

 
   
Reset

Senior Backend Python Engineer for AI Powered Credit Risk

Citigroup Inc. is seeking a Senior Python Software Engineer in Greater London to develop scalable backend systems for AI tools. The ideal candidate will have proficiency in Python and FastAPI, experience with design patterns, and the ability to work on enterprise software solutions. Alongside competitive salary ...

Senior Backend Python Engineer for AI Powered Credit Risk

Citigroup Inc. is seeking a Senior Python Software Engineer in Greater London to develop scalable backend systems for AI tools. The ideal candidate will have proficiency in Python and FastAPI, experience with design patterns, and the ability to work on enterprise software solutions. Alongside competitive salary ...

Technical Architect Python

Responsibilities Lead the design and architecture of complex Python applications, considering scalability, performance, and maintainability. Evaluate and select appropriate Python frameworks (Django, Flask, FastAPI, etc.) based on project requirements. Create detailed te ...

Technical Architect Python

Responsibilities Lead the design and architecture of complex Python applications, considering scalability, performance, and maintainability. Evaluate and select appropriate Python frameworks (Django, Flask, FastAPI, etc.) based on project requirements. Create detailed te ...

Senior Python Engineer AI PropTech Backend (Hybrid)

An innovative property management firm is seeking a Senior Python Engineer to join their engineering team in London. You will design and build backend systems, integrating AI models into production. This role requires expertise in Python and frameworks like FastAPI or Flask, along with experience in cloud platfo ...

Software Engineer

I'm working on a genuinely interesting product focused engineering role with a fast growing AI driven data platform operating in one of the largest global financial markets. This is not a maintenance heavy environment. The team are building real systems from scratch APIs data pipelines automation an ...

Commissioning Engineer (Software Developer)

In addition to the benefits you’d expect, UK employees also receive free single medical cover and digital GP service, family‑friendly benefits such as enhanced parental leave pay and free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development ...

Senior Software Engineer (AI HealthTech) Up to £100k + Bonus + Equity FULLY REMOTE

Senior Software Engineer (AI HealthTech) - Up to £100k + Bonus + Equity - FULLY REMOTE Client: AI HealthTech Scale-Up – Backed by Top‑Tier Investors, Led by World‑Class Engineers Salary: Up to £100k + Bonus + Equity Location: Remote (UK‑based) with an optio ...

Senior Software Engineer (AI HealthTech) Up to £100k + Bonus + Equity FULLY REMOTE

Senior Software Engineer (AI HealthTech) - Up to £100k + Bonus + Equity - FULLY REMOTE Client: AI HealthTech Scale-Up – Backed by Top‑Tier Investors, Led by World‑Class Engineers Salary: Up to £100k + Bonus + Equity Location: Remote (UK‑based) with an optio ...

Senior Python Engineer (Python + PowerShell)

As a Global Relay Senior Python Software Developer engineer you will be part of a small team of developers designing, developing and maintaining scripts for publishing demo data into Global Relays production environment and demo environments which are used by our sales teams to demonstrate the capabilities ...

Senior Python Engineer (Python + PowerShell)

As a Global Relay Senior Python Software Developer engineer you will be part of a small team of developers designing, developing and maintaining scripts for publishing demo data into Global Relays production environment and demo environments which are used by our sales teams to demonstrate the capabilities ...

AI‑First Product Engineer — Build Multimodal Agent Systems

A leading AI startup in London is seeking a Product Engineer to join a dynamic team focused on innovative AI solutions. This role involves building scalable systems using modern technologies like FastAPI and React, shaping user interfaces for agent collaboration, and defining technical strategies. The ideal cand ...

Senior Backend Engineer — AI Platform & Growth (London)

W Talent is seeking a Senior Backend Engineer in London to enhance our AI platform. In this role, you will design and develop scalable backend services using Python, FastAPI, and Django, while ensuring high performance and security practices. You will have significant autonomy and contribute to architectural dec ...

Senior Python & AI Backend Engineer — On‑Site London

SGI, a fast-growing AI startup in Central London, is seeking a Senior Backend Python & AI Engineer to build secure and high-performance backend systems for healthcare operations. This full-time role requires 5+ years in backend engineering and experience with Python frameworks such as FastAPI, Django, or Flask. ...

Senior Python Engineer AI Training & Code Review (Remote)

Prolific is seeking Senior Python Developers for their Expert Network to assist in training and evaluating cutting-edge AI models. This role offers an opportunity to collaborate on innovative projects and contribute to the advancement of AI capabilities. The ideal candidate should have a BSc in Compute ...

Senior Backend Engineer — AI Platform & Growth (London)

W Talent is seeking a Senior Backend Engineer in London to enhance our AI platform. In this role, you will design and develop scalable backend services using Python, FastAPI, and Django, while ensuring high performance and security practices. You will have significant autonomy and contribute to architectural dec ...

Python AI Engineer PropTech London (onsite)

Job Description Lead Python Engineer | AI, Python, FastAPI, Django, Microservices, APIs, Cloud | London | up to £130k + EquityBuild AI-powered systems that automate real-world workflows at scale.This is an opportunity to join a fast-growing AI startup building ...

Python AI Engineer PropTech London (onsite)

Job Description Lead Python Engineer | AI, Python, FastAPI, Django, Microservices, APIs, Cloud | London | up to £130k + EquityBuild AI-powered systems that automate real-world workflows at scale.This is an opportunity to join a fast-growing AI startup building ...

AWS/Python Software Engineer

We’re looking for a talented and proactive AWS/Python Software Engineer to join our data engineering team. You will be designing and building data systems, APIs, and event-driven services that power Citywire’s global products. We prototype fast, ship often, and iterate quickly, but we also know whe ...

AWS/Python Software Engineer

We’re looking for a talented and proactive AWS/Python Software Engineer to join our data engineering team. You will be designing and building data systems, APIs, and event-driven services that power Citywire’s global products. We prototype fast, ship often, and iterate quickly, but we also know whe ...

Software Engineer (Integrations)

Alpha is a leading language service provider (LSP), with a global presence and a commitment to delivering cutting-edge tech-driven solutions. We are seeking a highly skilled and motivated developer to join our team. This is an exciting opportunity to work on impactful projects, leveraging modern technologi ...

Software Engineer (Integrations)

Alpha is a leading language service provider (LSP), with a global presence and a commitment to delivering cutting‑edge tech‑driven solutions. We are seeking a highly skilled and motivated developer to join our team. This is an exciting opportunity to work on impactful projects, leveraging modern technologi ...

Back End Developer (DV Cleared)

DV Cleared Backend DeveloperLocation: UK WideClearance: DV clearance requiredSector: Defence & National SecurityRole SummaryOur client is seeking DV cleared Backend Developers to support high impact Defence and Security programmes. You will design, build and operate se ...

Remote Senior Python Engineer — Public API & AI Backend

Photoroom is seeking a Senior Python Engineer for its Public API team. The role involves designing and evolving our public API product, crucial for accessing Photoroom's AI capabilities. Candidates should have strong backend experience in Python and skills in API design, particularly with FastAPI. The position s ...

Remote Senior Python Engineer — Public API & AI Backend

Photoroom is seeking a Senior Python Engineer for its Public API team. The role involves designing and evolving our public API product, crucial for accessing Photoroom's AI capabilities. Candidates should have strong backend experience in Python and skills in API design, particularly with FastAPI. The position s ...

Backend Engineer (£100k £200k + Equity) at early stage AI EdTech startup

Job Title Backend Engineer Salary £100k-£200k + Equity Company Description Early-stage AI EdTech startup Job Description As the founding backend engineer, you will architect and build a mission‑critical platform from the ground up using Python ...

AI Engineer

Compensation: Competitive salary + meaningful equity Team: Working directly with founders and early engineering team Overview We’re building AI-powered products that solve complex real-world problems using large language models and modern machine le ...

Lead Python Engineer – Cloud Native Systems & Architecture

Velocity Tech is seeking a Lead Software Engineer based in Greater London to design and deliver scalable cloud-native systems. This hands-on leadership role involves shaping architecture, leading engineering efforts, and mentoring a talented team. The ideal candidate will have over 7 years of experience as a Sen ...

Lead Python Engineer – Cloud Native Systems & Architecture

Velocity Tech is seeking a Lead Software Engineer based in Greater London to design and deliver scalable cloud-native systems. This hands-on leadership role involves shaping architecture, leading engineering efforts, and mentoring a talented team. The ideal candidate will have over 7 years of experience as a Sen ...

Full Stack Engineer

Full Stack Engineer Hybrid (London, Cambridge, or Bristol – 3 days per week) Up to £100,000 + 5% Bonus + Benefits Overview Are you a talented Full Stack Developer looking to work at the forefront of AI and software innovation? We’re partnering with a leading international la ...

Senior BackEnd Developer Cyber

. Methods Business and Digital Technology Limited Methods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we ...

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 ...

Python Developers

Position Description: CGI’s Space, Defence and Intelligence business unit focuses on delivering contemporary and innovative technical solutions to government agencies tackling some of the most complex challenges. We design, build, and operate bespoke, mission-critical systems that help ke ...

Python Developers

Position Description: CGI’s Space, Defence and Intelligence business unit focuses on delivering contemporary and innovative technical solutions to government agencies tackling some of the most complex challenges. We design, build, and operate bespoke, mission-critical systems that help ke ...

Software Engineer / Developer (AWS, Python, Terraform) (SC / DV Cleared)

Software Engineer / Developer (AWS, Python, Terraform)Location: UK (Hybrid / Remote – clearance dependent) Security Clearance: SC or DV required Engagement: Contract (Inside IR35) Sector: Public Sector / Defence / National Infrastru ...

Software Engineer / Developer (AWS, Python, Terraform) (SC / DV Cleared)

Software Engineer / Developer (AWS, Python, Terraform)Location: UK (Hybrid / Remote – clearance dependent) Security Clearance: SC or DV required Engagement: Contract (Inside IR35) Sector: Public Sector / Defence / National Infrastru ...

Senior BackEnd Developer Cyber (Contract)

. Methods Business and Digital Technology Limited Methods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we ...

Full Stack Engineer

About 9fin 9fin is the AI platform powering global debt markets — the world’s largest asset class at over $145 trillion. Debt markets are vast, global, and mission‑critical, yet still run on fragmented data, PDFs, and manual workflows. 9fin replaces this broken infrastructure with a single platfo ...

Perm Founding AI Engineer London (3 days a week) Energy StartUp

Job Description Founding AI Engineer – AI Agents – London – £120k–£150k + Equity - Hybrid 3 days a week in office A venture-backed AI startup is looking for a Founding Engineer to help build a next-generation agentic AI platform transforming how billions are deployed int ...

Perm Founding AI Engineer London (3 days a week) Energy StartUp

Job Description Founding AI Engineer – AI Agents – London – £120k–£150k + Equity - Hybrid 3 days a week in office A venture-backed AI startup is looking for a Founding Engineer to help build a next-generation agentic AI platform transforming how billions are deployed int ...

Hybrid Full Stack Developer (Python/JS) with SC Clearance

RedRock Resourcing is seeking a Full Stack Developer to join their team in Wiltshire with a hybrid work environment. The role involves building scalable platforms and working on analytics initiatives that positively impact the market. Candidates must have practical experience with Docker, Kubernetes, and a stron ...

Python Engineer

Join to apply for the Python Engineer role at LinkedTrade Join to apply for the Python Engineer role at LinkedTrade Are you a passionate Python developer looking for your next challenge? LinkedTrade Technologies Ltd, a leadi ...

Python Engineer

Role Highlights: Position: Python Engineer Location: Remote within the UK Employment Type: Permanent Compensation: Competitive market salary plus equity options Overview: An innovative EdTech start-up is seeking a skilled P ...

Python Engineer

About Lendable Lendable is on a mission to build the world's best technology to help people get credit and save money. We're building one of the world’s leading fintech companies and are off to a strong start: One of the UK’s newest unicorns with a team of just over 700 people ...

Python Engineer

About Lendable Lendable is on a mission to build the world’s best technology to help people get credit and save money. We’re building one of the world’s leading fintech companies and are off to a strong start: One of the UK’s newest unicorns with a team of just over 700 people ...

Python Engineer

4 Months | Watford (HYBRID) We’re hiring a Senior Python Engineer with proven time-series experience to work on a real-time data platform. This is a backend engineering role focused on event-driven systems and time-series data. It is not a data science or analytics position. What ...

Python Engineer

We have a fantastic new opportunity to join our team at Smartodds as a Python Engineer. Based in North London, Smartodds provides in-depth research and analysis on sporting events around the world, supported by world-class, bespoke software platforms. We are proud of our collaborative and dynamic c ...

Python Engineer

We have a fantastic new opportunity to join our team at Smartodds as a Python Engineer. Based in North London, Smartodds provides in-depth research and analysis on sporting events around the world, supported by world‑class, bespoke software platforms. We are proud of our collaborative and dynamic c ...

Python Engineer

Join to apply for the Python Engineer role at LinkedTrade Join to apply for the Python Engineer role at LinkedTrade Are you a passionate Python developer looking for your next challenge? LinkedTrade Technologies Ltd, a leadi ...

Python Engineer

JUXT is seeking experienced engineers to join our client projects. You ll be responsible for engineering global scale software systems in banking, hedge funds and other financial institutions. We re looking for engineers that can build using modern cloud-native principles, employ leading and open-source te ...

🚀 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

    Fastapi Python Developer Jobs in United Kingdom Job Search Guide, Trends and Insights