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

Backend Engineer: Real Time AI Voice for NHS

A healthcare technology company in Borehamwood is seeking a Backend Software Engineer to develop AI-powered voice agents for NHS patient triage. You will design scalable backend systems in Node.js and optimize AWS infrastructure for real-time patient interactions. The ideal candidate has over 5 years of experien ...

Test Automation Engineer Playwright & TypeScript (Hybrid)

A financial technology company in Greater London is seeking a Test Automation Engineer to ensure the quality of software products. You will create automated tests and collaborate with development teams to enhance product quality. The role requires experience in functional and integration testing, as well as prof ...

Senior Frontend Engineer Scale Platform (React/TypeScript)

A global financial technology firm seeks a senior software engineer to build scalable and reliable systems. This role involves architecting solutions for major clients, working with multi-tenant infrastructures, and collaborating across various teams. Candidates should have 3+ years in ReactJS and TypeScript, an ...

Salesforce Integrations Engineer (Hybrid London)

A leading communications platform provider is seeking a Software Engineer to join their Integrations team in London. This hybrid role focuses on developing and maintaining Dialpad’s Salesforce integration, collaborating closely with various stakeholders to enhance features. Applicants should have proficiency in ...

Platform Systems Engineer: Scalable AI Infra & Observability

A global AI research company in London is seeking a Software Engineer for Platform Systems to enhance large-scale AI training infrastructure. Key responsibilities include designing failure detection systems, improving observability, and collaborating with various teams to ensure the platform's reliability. Ideal ...

Backend Engineer for Secure Government Systems (Node/.NET)

A technology consultancy in the UK seeks a skilled Software Engineer to work on impactful government projects. You will design and develop systems and APIs with Node.js/.Net in an agile environment, collaborating with multidisciplinary teams to ensure secure and user-centred services. Ideal candidates will have ...

Senior AI Engineer Applied AI & Gen AI (AWS)

A leading global financial services firm is seeking a Software Engineer III in Applied AI to innovate banking solutions. In this role, you will develop machine learning models, collaborate with a diverse team, and implement generative AI applications. Ideal candidates have a strong STEM background and experience ...

ML Systems Engineer: Scale RL Training & Infra

A leading tech firm in London seeks an ML Systems Engineer focusing on model training and infrastructure. This role involves developing synthetic data pipelines and managing RL training environments. The ideal candidate has a strong software engineering background, proficiency in Docker and Kubernetes, and exper ...

Remote Solutions Engineer: Identity Architecture & Demos

A leading customer identity platform seeks an experienced Solutions Engineer in the London metro area. You will drive technical discovery, guide architectural decisions, and collaborate with teams to demonstrate product capabilities. Ideal candidates have over 4 years of software development experience and stron ...

Senior Staff Engineer: Data Streaming & Event Driven Architecture

A leading sportswear company is looking for a Staff Software Engineer to enhance event-driven architectures and drive the development of data streaming. The role involves mentoring junior engineers and collaborating with global teams. Candidates should have over 5 years of experience in scalable systems and exte ...

Graduate Structural Engineer — Design for Sustainability

A leading design firm in Greater London is seeking a dedicated structural engineer to join their civil and structural engineering team. You will work on diverse projects, actively contributing to the design and technical aspects across varied sectors. Ideal candidates should have strong design and technical skil ...

Founding AI Engineer Build the Hospitality OS with Equity

A profitable AI startup is looking for a Founding Engineer to join their high-velocity team to automate hospitality workflows using ML and AI. This role involves full-stack feature development with TypeScript and offers significant equity, enabling candidates to influence the technical culture in a fast-growing ...

Automation QA Engineer — AI‑Driven Testing & CI/CD

A global financial wellness platform is seeking a QA Engineer (Automation) in London for a hybrid role. You will design and maintain automated test frameworks and CI/CD pipelines to ensure high quality and reliable software delivery. Ideal candidates will have experience with SQL, AI-driven test generation, and ...

Senior AI Product Architect & Technical Leader

A global recruitment consultancy is seeking a Principal Software Engineer to design and scale AI products used by numerous customers worldwide. The role involves hands-on coding, team mentorship, and significant technical leadership while driving AI adoption in various industries. Candidates should have 10-15 ye ...

Product Driven Full Stack Engineer — Hybrid (London)

A fast-growing fintech company in London seeks a Full Stack Software Engineer to bridge business needs with technical execution. You'll focus on building scalable systems with a product-first mindset. The role demands exceptional engineering skills and strategic communication to ensure effective delivery of feat ...

Hybrid Automated Test Engineer – UI, API & CI/CD

A digital business in London is seeking a Mid-Level Test Engineer to enhance software quality through automated testing solutions. You will design automated test plans and collaborate with teams across various locations, ensuring applications are reliable and maintain high standards. Ideal candidates have experi ...

Frontend Engineer AI Driven React/Node Apps

A leading science information provider in Greater London is seeking a Senior Software Engineer I to contribute to developing modern web applications using React and Node.js. This role requires a strong collaborative mindset and the ability to adopt AI-assisted development workflows. The ideal candidate has exper ...

Remote Full Stack Engineer — AI Powered Markets Platform

A leading sports betting platform in Greater London is seeking a Full Stack Software Engineer to design and maintain web applications that allow users to engage with prediction markets. You will work on scalable features using React, Next.js, and JavaScript/TypeScript while leveraging AI tools for development. T ...

Senior Enterprise Solutions Engineer Code Security

A leading technology company located in the United Kingdom is looking for a Sr. Sales Engineer to enhance developer security and support customer engagements. This role requires excellent communication skills and a deep understanding of developer workflows within software environments. The ideal candidate will h ...

Senior DevOps Engineer — Hybrid Cloud, Kubernetes & CI/CD

A leading technology consultancy in Greater London seeks a skilled DevOps Engineer to improve software quality and delivery times in a hybrid working environment. The ideal candidate will have over 5 years of experience, knowledge of AWS and CI/CD, and practical skills in Terraform and Kubernetes. Responsibiliti ...

Go Backend Engineer – AI Driven FinTech, Flexible Remote

A forward-thinking FinTech firm in London seeks a Software Engineer (Go) to develop high-performance back-end services supporting financial applications. The ideal candidate will have strong AI integration skills, proficiency in JavaScript and experience with modern development tools. Benefits include 38 days of ...

macOS Endpoint Engineer: Automation & Security

A leading design technology company is seeking an experienced IT Engineer focused on macOS endpoint management. This role involves automation, reliable software delivery, and securing internal IT services. Candidates should have significant hands-on experience in managing macOS environments and familiarity with ...

Foundry App Engineer — Full Stack, Data Driven

A leading technology company in Greater London is seeking a Full Stack Engineer to develop applications in its data platform. You will work on crafting user interfaces, APIs, and interact with customers to improve product offerings. This role requires 2+ years of frontend software engineering experience, strong ...

Fullstack Growth Engineer: Activate, Monetize, Retain

A software development company in Greater London is in search of a full-stack engineer dedicated to building powerful growth and monetization systems. The ideal candidate will have over 5 years of experience creating user-facing products and possess strong collaborative skills. Responsibilities include developin ...

Startup AI Engineer: Build & Scale Claude powered Apps

A leading AI technology firm in the UK is seeking an Applied AI Engineer to support AI-native startups using the Claude Developer Platform. In this role, you will advise technical teams, develop documentation, and foster community engagement. Ideal candidates will have extensive software engineering experience, ...

Full Stack Engineer for Automations & Workflows

A leading digital experience platform is seeking a Full Stack Software Engineer to join their innovative team in Greater London. This role involves collaborating with product managers and developers to design high-performance applications using TypeScript, React, and Node.js. Ideal candidates will have experienc ...

Full Stack Engineer: AI HealthTech | London | Unlimited PTO

A pioneering fitness technology company in Greater London is looking for a Full Stack Software Engineer to join its high-performing team. You will develop innovative features for health coaching products, impacting thousands of users daily. Ideal candidates have experience with AI-assisted development and full s ...

AWS Cloud Engineer Automation & Incident Resolution

A global leader in mine planning software is seeking an AWS Cloud Engineer to tackle complex technical issues across their platform. The role involves resolving high-priority escalations, deep troubleshooting in AWS environments, and developing automation scripts. Candidates should have significant experience in ...

Senior iOS Engineer SwiftUI, Secure UX for Executives

A leading technology and advisory firm in the UK is seeking a Senior iOS Engineer to modernise their iOS application. The ideal candidate will have strong iOS development experience, particularly with Swift and SwiftUI, and a solid understanding of MVVM architecture. Responsibilities include developing features, ...

Senior AI Cloud Infrastructure Engineer (Remote)

A leading AI cloud solutions provider in Greater London is looking for a Software Engineer to build and maintain core services for their cloud platform. Responsibilities include engineering infrastructure for high-throughput workloads and driving technical decisions for systems. The ideal candidate has strong ex ...

Senior AI Platform Engineer

A leading AI-driven company in the United Kingdom is seeking a Senior Software AI Engineer to design and maintain AI capabilities, drive innovation, and enhance product efficiency. The ideal candidate will have over 5 years of backend development experience and a strong understanding of AI tools, along with a pr ...

Senior Platform Runtime Engineer: Kubernetes & Multi Cloud

A leading tech company in Greater London seeks a Senior Software Engineer for Platform Runtime. This hybrid role involves designing Kubernetes Operators and ensuring reliable workload management in production. Candidates should have strong Golang skills and experience in Kubernetes. The position offers equity op ...

Senior Scala Backend Engineer – AI Platform & Microservices

A leading AI company in Greater London is looking for an experienced software engineer to join their team. In this role, you will be responsible for building features and services on their innovative product platform while utilizing functional Scala and working with distributed systems. The company offers a comp ...

Senior Payments & Treasury Engineer — Global Scale

A global brokerage firm based in London is looking for a Senior Software Engineer to build and scale their payment systems used by millions of users. The ideal candidate has over 3 years of experience, a strong background in microservices, and proficiency in Go. You will design solutions for a comprehensive trea ...

Partner Solutions Engineer Channels (EMEA)

A technology company in Greater London seeks a Solutions Engineer to drive partner enablement and provide technical guidance on products. You will work closely with sales teams and partners to ensure effective integration of solutions. The ideal candidate has experience in software development, excellent communi ...

Customer Facing Deployment Engineer

An innovative tech company in Greater London is seeking a Forward Deployed Engineer to support customer deployments and enhance their software testing platform. This role combines engineering and customer interaction, requiring strong programming skills and effective communication. Ideal candidates will have a c ...

Test Automation Engineer — Web & Mobile, CI/CD

A financial technology firm in Greater London is seeking a Test Automation Engineer. You will be crucial in ensuring software quality by building and executing automated tests across the platform. Ideal candidates have experience in functional testing and strong skills in tools like Playwright and Appium. The ro ...

Onsite Test Engineer – DevSecOps & AI/ML

A leading defense technology company in the UK is seeking a Test Engineer to join their team in Gloucester, Manchester, or London. The role involves collaborating within an Agile software delivery team, creating automated test frameworks, and supporting development interactions. The company offers substantial be ...

Healthcare DevOps Engineer: Secure Hybrid Deployments

A healthcare technology company based in London seeks a DevOps Engineer to design and automate secure deployments of their software platform across varied environments. Responsibilities include building CI/CD pipelines and ensuring compliance with security practices. The ideal candidate has extensive experience ...

Cloud Platform Engineer – IaC, CI/CD & DevOps

A leading tech company in Greater London is seeking a Platform Engineer to design, build, and maintain scalable cloud infrastructure. The role involves driving DevOps practices and collaborating across teams to deliver high-quality software solutions. Candidates should have extensive experience with AWS, Infrast ...

Platform Engineer: Scale, Reliability & Impact

Ashby is hiring a Platform Engineer in Greater London. This role involves enhancing systems for a rapidly growing customer base, focusing on infrastructure-as-code, and collaborating closely with product teams. Candidates should have a software engineering background, experience building scalable systems, and a ...

Senior Backend Engineer — Scalable IoT Platform

HiveMQ is seeking an experienced software engineer to join their Dev team in Greater London. You will design, develop, and maintain the HiveMQ platform for scalable IoT deployments, ensuring application resiliency. Ideal candidates will possess over 5 years of experience in backend applications, strong problem-s ...

Platform Engineering Lead — AWS, Kubernetes, Observability

A leading digital transformation consultancy in London is seeking a Software Engineer to join a dedicated Platform Engineering team. The role involves tackling meaningful public sector projects and offering opportunities for professional growth, including leadership training. Ideal candidates should have key tec ...

Rust Systems Engineer AI Security Platform (Equity)

Jack & Jill is looking for a Systems Engineer to join a $25M Series A cybersecurity startup in London. You will develop high-performance software in Rust for an AI security platform, ensuring real-time data protection across systems. Ideal candidates have a strong background in systems programming with a focus o ...

Senior DevSecOps Engineer: Secure Cloud & CI/CD (Hybrid)

A leading fintech company in Greater London is looking for a Senior DevSecOps Engineer to drive security integration into the Software Development Lifecycle (SDLC). This role involves automating compliance checks, managing security tools, and ensuring a secure Google Cloud Platform environment. Candidates should ...

Security Engineer, AI Driven Vulnerability Rules

A leading security company is looking for a Security Engineer specializing in vulnerability modeling. This role involves developing automated detection rules for various codebases and working alongside software engineers to innovate security measures. Candidates should possess a strong foundation in application ...

Senior App Security Engineer: Automate & Harden SDLC

A leading technology firm in London is looking for a Senior Application Security Engineer to enhance their team’s application security testing. In this role, you will be responsible for leading penetration testing, automating security processes, and working closely with product and engineering teams to implement ...

Firmware Engineer, Embedded Systems for Renewable Energy

A leading renewable energy company in Greater London is seeking an experienced Embedded Systems Engineer to develop low-level firmware for microcontrollers and create real-time software for energy devices. The ideal candidate has a strong background in C programming and embedded systems, with over 2 years of exp ...

Senior Backend Architect Ultra Scale Data Platform

A leading data and AI firm in Greater London seeks a Senior Staff Software Engineer to design and maintain backend systems that power their platform. Must have over 15 years of experience in distributed systems and a strong foundation in algorithms. The role includes technical leadership, mentorship, and project ...

Senior Full Stack Engineer (C#/React) — Salesforce DevOps

A leading DevOps platform company is looking for a Senior Software Engineer to enhance their product and collaborate closely with users. The candidate should have solid experience in C#, React, and TypeScript, along with a pragmatic and feedback-driven approach. This role offers a competitive salary between £59k ...

🚀 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