Lead Software Engineer Python Java Jobs in London, 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

Impact AI/ML Engineer — Hybrid London, SC Clearance

iO Associates is seeking an AI/ML Engineer for a hybrid role in London, offering a salary between £100k and £140k, dependent on experience. The ideal candidate will have a strong software engineering background and a passion for turning complex customer problems into impactful solutions. You'll be responsible fo ...

Platform Engineer II — Global Banking (Cloud Microservices)

JPMorgan Chase & Co. is looking for a Software Engineer II to enhance and build trusted technology products within the Global Banking Platform. The role involves developing scalable microservices, writing high-quality code, and automating testing processes. The successful candidate will aid in the transition to ...

Senior ML Platform Engineer: Scale ML Pipelines

A leading food delivery company in London is seeking a Senior Software Engineer specialized in Machine Learning Platform. In this hybrid role, you'll design a centralized ML platform, build infrastructure for training pipelines, and collaborate on MLOps practices. The ideal candidate has strong coding experience ...

Senior Full Stack Engineer: Ground Floor AI Platform Lead

RGH-Global Ltd is seeking a Senior Full-Stack Software Engineer for a pivotal greenfield project in London. The position involves building a customer-facing platform, backend automation, and architecting technical foundations from the ground up. Ideal candidates will have over 5 years of experience, strong skill ...

Senior Software Engineer Payments & Cross Border Platform

Ebury is seeking a Senior Software Engineer to join our London office in a hybrid capacity. You will be integral in developing our multi-currency account systems, enhancing payment processes. Responsibilities include leading product initiatives, collaborating with cross-functional teams, and mentoring junior eng ...

GPU Performance Optimization Engineer

A leading technology company in the United Kingdom is seeking a GPU Performance Analysis Engineer. This role focuses on developing and validating performance test plans for GPUs, analyzing performance issues, and collaborating with engineers to identify solutions. The ideal candidate will have strong skills in h ...

GenAI Engineer for the Microsoft GenAI Stack

Avanade is seeking a highly skilled Agentic AI Engineer to develop and deploy cutting-edge generative AI solutions within the Microsoft ecosystem. The ideal candidate will have a strong software development background with expertise in Python and experience in API development using FastAPI, Flask, or Django. Fam ...

Senior DevTools Engineer Hybrid Work, High Impact Tools

Tower Research Capital, located in Greater London, is seeking an experienced software engineer to enhance developer productivity and systems infrastructure. You'll design tools, automate workflows, and collaborate across teams. Ideal candidates should have strong programming skills in C++, Rust, and Python, alon ...

Principal Engineer C#/.NET, AWS, AI Driven FinTech

Client Server is looking for a Principal Software Engineer / Developer (C# .Net AWS Python) in London with a salary up to £120k. In this role, you will architect and build scalable solutions, collaborate with Agile teams, and drive AI adoption. Key qualifications include strong C# and AWS skills, experience with ...

Generative AI Research Engineer — 3D Body & Animation

Google Inc. is seeking a Research Software Engineer specializing in Generative AI. You will develop algorithms for 3D body shape estimation and contribute to innovations in machine learning and augmented reality. The ideal candidate holds a Bachelor's degree in Computer Science and has over five years of experie ...

Associate Backend Engineer Scalable Search for 1M+ Users

Depop is seeking an Associate Backend Software Engineer to join the Search Retrieval team in London. You will work closely with Product Managers and Data Scientists, producing high-quality code for over 1 million active users daily. The role requires excellent communication skills, a strong sense of ownership, a ...

Principal AI Engineer: Production LLMs & RAG

Oliver Bernard is seeking a Principal AI Engineer in London to design and build LLM-powered applications. This hybrid role involves developing workflows and architectures, implementing RAG pipelines, and collaborating closely with engineers in Python. The ideal candidate has hands-on experience with LLM applicat ...

Senior AI Systems Engineer: Agentic Platforms & Scale

MA (Montreal Associates) is looking for a Senior Software Engineer in London (Hybrid) to join a cutting-edge AI startup. You will play a pivotal role in designing and scaling an AI platform, influencing architecture, and mentoring engineers. The ideal candidate has strong programming skills in Python or Golang a ...

Junior Software Engineer (Hybrid) London, DevOps & Cloud

A forward-thinking technology company in London is seeking a Graduate / Junior Software Engineer to join their growing team. This hybrid role offers a great opportunity for someone early in their career to gain hands-on experience with scalable and secure systems. Responsibilities include automating DevOps workf ...

Hybrid Senior Full Stack Engineer — Data Platforms & AI

RSMB is seeking a Senior Full Stack Engineer in London, working hybrid (2 days in the office). This full-time role offers a competitive salary of up to £85,000 per annum. The position involves designing high-performance applications and collaborating with data science teams. Candidates should have 5–10 years of ...

Senior AI Engineer Healthcare Communications & Secure Data

Niulix is seeking a Software Engineer in Greater London to deploy AI systems in healthcare, focusing on patient communication, triage, and secure data layers using Python. The ideal candidate will have over 5 years of experience building complex, production-grade systems and a proven record of turning ambiguous ...

Rust Kernel Engineer – Scalable Backend & Observability

hyperexponential is looking for a Software Engineer for the Kernel Team to design and deliver features for their AI-powered platform. The role involves enhancing a modular architecture and building automated tests for complex execution scenarios. Candidates should be experienced in backend systems development us ...

ML Tech Lead & Strategy Architect — London

Capital One is looking for a Staff Software Engineer - Machine Learning based in Greater London. In this hybrid role, you'll own the ML/AI technical strategy for UK use cases, drive architecture for AI solutions, and collaborate with teams to enhance delivery. The ideal candidate has deep expertise in Python, ML ...

Data Engineer – Fintech Platform & AI Ingestion

Kalpa Group in Greater London is looking for a Software & Data Engineer to tackle complex data issues in the fintech sector. The role involves owning ingestion pipelines, designing scalable data models, and integrating AI into the platform for improved data quality and reliability. Candidates should have strong ...

Senior Software Engineer – AI for Sustainable Construction

AECOM in Greater London is seeking a Senior Software Engineer to join their AI Engineering team. In this role, you will design and build platform services, ensuring ML models run reliably while optimizing AI workloads using technologies like Docker and GitHub Actions. The ideal candidate will have strong program ...

Staff SRE: Scale, Reliability & Cloud Native Systems

Genesis AI, located in the Greater London area, seeks a software engineer to tackle challenges related to reliability, scalability, and system performance. The successful candidate will design and optimize distributed systems using technologies such as Kubernetes and Python. Responsibilities include driving solu ...

Cloud Native Microservices Engineer II

JPMorgan Chase is seeking a Software Engineer II to enhance and build trusted technology products within the Global Banking Platform. The role involves developing scalable microservices using best practices and participating in a secondment with a FinTech partner. Candidates should have experience in programming ...

Senior Simulation Engineer Robotics & Visual Fidelity

Wayve is seeking a Software Engineer for the Simulation Technology team in Greater London. This full-time role involves expertise in evolving core components of Wayve's simulation platform, focusing on video fidelity and robot emulator fidelity, among others. The ideal candidate has over 5 years of industry expe ...

Principal AI Systems Engineer Healthcare Platforms

TechTree is looking for a Principal Software Engineer to deploy AI systems in healthcare, focusing on patient communication and secure data layers using Python. You will work directly with hospitals to build and scale enterprise-grade systems. The role requires 5+ years of experience in building complex systems ...

Founding ML Engineer: Build a Living Semantic Layer

JetBrains is looking for a top-class ML Engineer to shape the future of software development through AI and ML technologies. You will define the research agenda and own the AI engineering stack. Responsibilities include designing LLM solutions and establishing MLOps practices. The ideal candidate should have at ...

Back End Engineer (Generative AI) in London Neo4j

Staff-Level Full-Stack Software Engineer 108 E 16th Street, New York, NY 10003 Job Description Expand our suite of GenAI offerings. Key Responsibilities Design, develop, and maintain high-performance back-end systems using Python to support GenAI ...

Senior Data Platform Engineer Systematic Trading Core

Selby Jennings is seeking a Senior Engineer for a front-office engineering team in Greater London. The role focuses on building robust data systems that serve quantitative research and trading. You will work on ingestion, modeling and storage of diverse datasets, supporting both historical and real-time data. Id ...

AI Training Architect — Early Stage, High Impact

bloom is seeking a Software Engineer to work at the forefront of AI in London. You'll design training curricula for AI systems and create problem sets to enhance their learning. The ideal candidate has 1+ years of Python experience and is comfortable with LLM APIs. This is not just a maintenance role; it’s hands ...

Remote Senior Full Stack Engineer Equity + AI Impact

Cogna, an ambitious early-stage startup in Greater London, seeks a Full-Stack Software Engineer. You will define and maintain backend architecture and APIs while developing frontend interfaces. With at least 8 years of experience, you'll thrive in a fast-paced environment, building scalable microservices using m ...

Platform Engineer — AI Driven Backend & Pipelines

A tech startup is seeking a Software Engineer to build and maintain a shared platform that supports AI solutions. You will develop APIs, frameworks, and data services while collaborating with product engineers to enhance functionality. Candidates should have extensive experience in Python and AWS, alongside a st ...

Senior Internal Tools Engineer Fintech Platform

A leading cross-border fintech company in Greater London seeks a Senior Software Engineer to enhance internal tools. You will work closely with cross-functional teams to build reliable tools using Python and Kotlin while ensuring high code quality and mentor junior developers. The role requires substantial exper ...

Applied AI Engineer III ML & GenAI in Production

A leading global bank seeks a Software Engineer III to develop advanced AI and machine learning solutions. This role involves collaborating in a diverse team environment to deliver innovative banking experiences. Candidates should possess a strong background in AI/ML, coding proficiency in Python, and experience ...

Agentic AI Platform Engineer

A premier financial technology firm in London is looking for an AI Engineer to develop and maintain an innovative agentic platform. This role involves creating and enhancing Python SDKs, implementing best practices for agent development, and delivering tailored AI solutions for the business. The ideal candidate ...

AI Backend Engineer — LLMs, GenAI & Scalable Systems

Moody's Corporation is seeking a Software Engineer specializing in AI systems to design and implement scalable, production-grade backend solutions using Node.js and Python. You will collaborate with data scientists and engineers to integrate cutting-edge machine learning techniques, focusing on large language mo ...

Senior AI Engineer, Build In House Agentic AI for Finance

La Fosse is seeking a hands-on AI Engineer in Greater London to develop in-house AI capabilities for managing $50B+ in assets. You will create RAG systems, work with LLMs, and build production APIs using Python. Ideal candidates will have 1-2+ years in AI engineering, 4 years in software or ML, and a background ...

Graduate Software Engineer/Quant Hybrid Working £60,000 £120,000 Base (+Bonus)

Graduate Software Engineer/Quant - Hybrid Working - £60,000 - £120,000 Base (+Bonus) An Elite Fintech Trading Firm are looking for a highly talented graduate to join an elite group of some of the best engineers and quants on the planet! This team has an unlimited tech budget, promotes a great cu ...

Lead Backend Engineer, Pension Platform (Remote)

InvestEngine is looking for a Lead Backend Engineer in Greater London to join and lead the Pension Team. The role involves hands-on backend development using Python 3.11 with Django, leading a team, and working closely with various stakeholders on product improvements. Candidates should have at least 5 years of ...

Principal Engineer DevSecOps & AI

Join us at Wolters Kluwer and be part of a dynamic global technology company that makes a difference every day. We’re innovators with impact. We provide expert software and information solutions that the world’s leading professionals rely on, in the moments that matter most.As part of this mission, we’ ...

Principal Engineer DevSecOps & AI

Join us at Wolters Kluwer and be part of a dynamic global technology company that makes a difference every day. We’re innovators with impact. We provide expert software and information solutions that the world’s leading professionals rely on, in the moments that matter most.As part of this mission, we’ ...

Reliability Engineer, Global Reliability Intelligence Programs

A Reliability Engineer focused on RCA and FMEA hunts down the true causes of failures and eliminates them before they happen again. They lead high-impact investigations, turn data into clear actions, and drive measurable improvements in uptime and performance. This role also gets ahead of problems by identi ...

Reliability Engineer, Global Reliability Intelligence Programs

A Reliability Engineer focused on RCA and FMEA hunts down the true causes of failures and eliminates them before they happen again. They lead high-impact investigations, turn data into clear actions, and drive measurable improvements in uptime and performance. This role also gets ahead of problems by identi ...

Applied Scientist, Offer Recommendations (Offers Tech)

Applied Scientist, Offer Recommendations (Offers Tech) London, United Kingdom | Posted on 11/05/2024 We're thrilled to present anincredible career opportunity! We're recruiting on behalf of a renownedmultinational company based in the United Kingdom, seeking an Applied Scientistto drive c ...

Computer Science Teacher | Brent | ASAP

Write a short description of your company, a boilerplate of the business, service or product that you offer. Include your business idea and the target audience. This text is primarily supposed to be descriptive, not selling.We are working with a prestigious independent school in Brent ...

Computer Science Teacher | Brent | ASAP

Write a short description of your company, a boilerplate of the business, service or product that you offer. Include your business idea and the target audience. This text is primarily supposed to be descriptive, not selling.We are working with a prestigious independent school in Brent ...

Backend Engineer (£40,000) at London software studio and legal tech lab

Job Title Backend Engineer Salary £40,000 Company Description London-based software studio and research lab building proprietary legal-tech and production systems Job Description As the first backend hire at this high‑standard software studio, ...

Associate Solution Engineer London

The Role Neo4j is the world’s leading graph database and our Sales Engineering team are the people that help customers realize its value every day. Neo4j has proven to be the go-to data management solution in use cases such as Fraud Detection, Knowledge Graphs, Recommendation and personalisation, ...

Platform Engineer

We’re working with a fast-growing Fintech company based in Central London that’s building scalable, secure, and high-performance financial platforms. They’re now looking for a Platform Engineer to play a key role in shaping their cloud infrastructure and engineering culture. Responsibilities < ...

Test Engineer, Cloud & Data Platform (Lakehouse)

LocationLondon, United Kingdom# Test Engineer, Cloud & Data Platform (Lakehouse) at N Consulting LtdLocationLondon, United KingdomSalary£225 - £250 /dayJob TypeContractDate PostedMay 7th, 2026Apply Now**Test Engineer, Cloud & Data Platform (Lakehouse)**Working : Hybrid (2 days from office)Office Location: London ...

Test Engineer Cloud & Data Platform (Lakehouse)

LocationLondon, United Kingdom# Test Engineer - Cloud & Data Platform (Lakehouse) at N Consulting LtdLocationLondon, United KingdomSalary£200 - £250 /dayJob TypeContractDate PostedMay 6th, 2026Apply NowJob Title: Test Engineer - Cloud & Data Platform (Lakehouse) Working : Hybrid (2 days from office) Office Loc ...

Technical Architect – Data Solutions Lead (Remote UK)

A tech solutions firm is seeking a Palantir Technical Architect to design and deliver data solutions. The ideal candidate will have experience in technical ownership and strong skills in Java, Scala, or Python. This role involves client interaction, technical standards management, and contribution to the data co ...

🚀 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

    Lead Software Engineer Python Java Jobs in London Job Search Guide, Trends and Insights