• London Jobs Expertini profile avatar

    • 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
    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. London
    4. Jobs
    5. Lead Software Engineer Python Java Jobs

    6. Download PDF

    Reset

    Create Job Alert
      Add Alert

     
     
    Create Alert
     
    Reset

    Startup AI Deployment Engineer — Shape Next‑Gen AI

    OpenAI is seeking a technically proficient engineer to join the AI Deployment Engineering team in London. The successful candidate will work with strategic startup customers to optimize systems and contribute to product improvements. Responsibilities include debugging workflows, prototyping evaluations, and tran ...

    Full Stack Engineer for Growth & Greenfield AI Projects

    trg.recruitment is seeking a Software Engineer to join their high-growth consumer tech startup in Greater London. The successful candidate will help drive growth across product and community through innovative Greenfield builds. Ideal candidates should have over 3 years of experience, be product-minded, and thri ...

    Senior Platform Engineer: Core Platform & Deployments

    Fanatics-Betting- is seeking a Level 3 Platform Engineer to join their Platform Engineering team. This role focuses on infrastructure and deployment capabilities that support the engineering teams. You will work on cloud infrastructure, release pipelines, and deployment systems. Required qualifications include 3 ...

    Water Optimization Engineer – Pilot Projects

    SUEZ is looking for a motivated Water/Wastewater Engineer or Data Scientist to join their Strategic Support Team in Greater London. The role involves applying optimization and machine learning to water systems, providing user training, and innovating software applications. Candidates should have a BSc/BEng in Ci ...

    Senior Mechatronics Engineer — Precision Motion & Control

    Premier Group is seeking a Senior Mechatronics Engineer to join their team in West London. This position involves developing precision motor control systems and integrating actuators, sensors, and encoders. The ideal candidate will have a degree in Mechatronics or a related field, alongside hands-on experience i ...

    GoLang Microservices Engineer Scalable APIs

    A tech-focused recruitment agency is seeking a skilled software engineer proficient in Golang. The successful candidate will be instrumental in delivering a robust product roadmap by developing clean, maintainable code in an agile environment. Key responsibilities include managing the codebase while creating mic ...

    Hybrid Cloud & Data Platform Test Engineer

    N Consulting Limited is seeking a Test Engineer for their Cloud & Data Platform team. This hybrid role in London involves working with technologies like Terraform and GitLab CI/CD, focusing on cloud testing and data platforms. Candidates should have 3-5 years of experience in QA or software testing with a solid ...

    Senior Forward Deployed Engineer (AI & Enterprise)

    Themis Solutions Inc. is seeking a Senior Forward Deployed Engineer to create impactful AI solutions for the legal industry. In this role, you will embed with enterprise clients, translating complex challenges into working software. The position requires strong full-stack fundamentals and hands-on experience wit ...

    Principal React/Next.js Architect Hybrid, High Impact

    Accelero is hiring a Principal Software Engineer to design and build scalable web applications using Next.js and React. The ideal candidate should have strong commercial experience with React & Next.js, and experience in CI/CD, specifically with GitHub Actions. This role offers real ownership and autonomy in a m ...

    Senior Rust Backend Engineer Scalable, Secure Systems

    A cutting-edge technology firm in Greater London is looking for a Senior Software Engineer (Backend) specializing in Rust. In this role, you'll develop secure and scalable backend systems for our platform, collaborate on product and engineering efforts, and contribute to open-source solutions. Ideal candidates w ...

    Senior Embedded Systems Engineer — Equity Options & Impact

    A leading climate technology firm in London is seeking a Senior Embedded Systems Engineer to design and scale embedded systems for the UK's largest synthetic fuel plant. The role offers full ownership of hardware and software, with opportunities for significant share options and an annual subsidy for living cost ...

    Senior DevOps Engineer Cloud Native & CI/CD

    A leading IT consultancy firm in Greater London is seeking an experienced DevOps Engineer to drive software quality and process improvements. The role requires collaboration with multi-disciplinary teams to implement best practices in DevOps. The ideal candidate will have over 5 years of experience, strong knowl ...

    Hybrid Senior Full Stack Engineer – TypeScript & React

    A technology-driven skincare start-up is seeking a Senior Software Engineer to join their dynamic team. In this hybrid role, you will utilize agentic tools to enhance productivity and work on full-stack feature development. This is an exciting opportunity to influence engineering standards while addressing impac ...

    Senior Full Stack Engineer — Hybrid + Stock Options

    A leading social impact organization in Greater London is seeking a passionate Senior Software Engineer to develop innovative platforms. In this role, you will work closely with an engineering team to build impactful applications, ensuring quality and security in your code. You should be skilled in both front-en ...

    Applied AI Engineer — Gen AI & MLOps in Production

    A leading financial services firm in Greater London is seeking a Software Engineer III to develop advanced machine learning models and deploy AI/ML applications within a collaborative environment. The ideal candidate will have an advanced degree in a STEM field and proven experience in AI/ML model development. R ...

    Senior Backend Engineer AI Driven Marketplace

    A leading fashion tech startup in London is seeking a Senior Backend Software Engineer to architect transaction systems for their AI-native secondhand fashion marketplace. You'll work on scalable systems integrating AI models into ecommerce, impacting the $350B industry. The ideal candidate has 3–6 years of expe ...

    Senior Civil Engineer Urban Development

    A leading global engineering firm in Greater London is seeking a Senior Engineer with solid experience in civil engineering and urban development projects. The role involves delivering sustainable design solutions and requires expertise in areas such as drainage, highways, and utilities. Candidates should posses ...

    Senior AI Native Engineer — React/NestJS, Ownership, London

    A growing tech startup in London is seeking a Mid-Senior Level Engineer to build AI-native products for the hospitality industry. You will collaborate with a focused, founder-led team utilizing modern frameworks like React and TypeScript. This role offers meaningful ownership in a profitable company that is quic ...

    Quality Engineer: Web & API Automation

    A leading digital creative agency in Greater London is seeking a QA Engineer to ensure the quality of web experiences and products. The ideal candidate will have over 3 years of experience in software testing and will work collaboratively with teams to implement testing strategies and improvements. Responsibilit ...

    Design Engineer – Civil Structures (Rail & Bridges)

    A global consulting engineering firm is seeking a Design Engineer to contribute to civil and structural design across various infrastructure projects in the UK. The role includes designing operational infrastructure like bridges and heavy civils, with a focus on coordination with engineering disciplines. Candida ...

    Senior Frontend Engineer (React) — Build Scalable UI & Data Apps

    Energy Jobline ZR is looking for a skilled Software Engineer to join the S&P Global corporates value stream technology team. The role involves developing scalable solutions to support the S&P ratings business through cutting-edge technologies. The ideal candidate will have a minimum of 5 years' experie ...

    Senior .NET AI Engineer Scalable Data Pipelines

    NCube Ltd is seeking a Senior Software Engineer to join their fast-scaling AI-driven data platform in Greater London. This role emphasizes .NET/C# development and requires significant leadership in architecture and technical direction for data processing capabilities. The ideal candidate will have over ...

    Senior Backend Engineer for Scalable, Secure AI Voice

    Hard Yaka is looking for an experienced Senior Backend Software Engineer to join their team in the United Kingdom. You will be responsible for designing, developing, and operating critical features that enhance customer value and ensuring the delivery of secure and scalable voice solutions. The ideal c ...

    Senior DevSecOps Application Security Engineer

    Eeze is seeking a Senior Security Engineer (Application) to enhance application security practices within a fast-paced engineering organization. The role involves partnering with engineering teams, implementing security controls, and ensuring security integration throughout the software lifecycle. Candidates sho ...

    AI Engineer — LLMs & RAG Architect (London On‑Site)

    Eden Smith Group is seeking an AI Engineer to design and deliver impactful AI solutions in London. You'll be part of an elite AI team, tasked with building scalable systems and driving innovation within a global energy software business. This opportunity offers a unique blend of job security from the corporate b ...

    .NET Backend Engineer: APIs & Integrations (Hybrid)

    Oliver Bernard is seeking a .NET Engineer to join their London team with a hybrid working model. This role will focus on designing, developing, and maintaining scalable backend services and APIs within a collaborative engineering team. Candidates should have over 3 years of experience in software engineering, sp ...

    Frontend Engineer for AI Data Platform (React/TS)

    Jack & Jill is seeking a Software Engineer (Frontend) in London, UK, to build intuitive interfaces for AI-native data orchestration. This key role involves developing responsive web applications, collaborating with teams to implement data workflows, and optimizing performance. Candidates should have strong exper ...

    DevSecOps Security Engineer — Hybrid (London/Bristol)

    HealthHero Services Ltd is seeking an experienced Application Security Engineer to join their team in London or Bristol. This role focuses on security across the software development lifecycle, with key responsibilities including implementing CI/CD security testing and conducting vulnerability management. </p ...

    BMS Applications Engineer – Build Efficient, Connected Buildings

    Metropolitan Services is looking for a BMS Application Engineer to enhance building operations through effective design and support of control and monitoring systems. You will work mainly from our office in Canary Wharf, engaging in travel to project sites as needed. You are expected to have significant const ...

    IT Support Engineer II – On Site in London with Bonus

    REL Field Marketing is searching for an IT Support Engineer - Tier 2 in Farringdon, London. In this full-time, permanent role, you will provide comprehensive technical support and manage IT tickets effectively. Your responsibilities will encompass hardware and software troubleshooting, as well as maint ...

    AWS Cloud Engineer Hybrid, Central Government

    Access Computer Consulting is seeking an AWS Cloud Engineer for a hybrid role, primarily working 2-3 days in Croydon and the rest remotely. Candidates must have strong AWS experience and have worked within central government in the past year. Key responsibilities include supporting software development and maint ...

    Remote UI Engineer: Mockups & Data Driven Interfaces

    Centric Software is looking for a highly skilled UI Engineer specializing in mockups and wireframes to join their remote team. The successful candidate will convert design concepts into visually appealing and functional user interfaces, utilizing expertise in TypeScript, React, and TailwindCSS. The rol ...

    Senior Defence Project Controls Engineer – SC Clearance

    Turner & Townsend Plc. is seeking a Senior Project Controls Engineer in Greater London to provide project controls services to their Defence client portfolio. The successful candidate will create project schedules and improve efficiencies. Applicants must have Project Controls experience, with demonstr ...

    Employee Owned Senior Structural Engineer Data Centre Design

    A leading design consultancy in London seeks a Senior Structural Engineer to oversee and mentor junior engineers. Responsibilities include designing and managing projects, ensuring client satisfaction, and working with a collaborative team. The ideal candidate holds a Bachelor's degree in Civil or Structural Eng ...

    Staff ML Inference Performance Engineer Edge GPUs

    Wayve, located in London, is seeking a Staff ML Performance Engineer to optimize ML inference on edge devices. This full-time role includes responsibilities such as profiling bottlenecks in the inference stack and implementing optimisations in compilers and runtimes. The ideal candidate has proven expe ...

    Senior Civil/Structural Design Engineer – Rail Infra

    SJ Group is seeking a Senior Design Engineer in Greater London to work on diverse infrastructure projects across rail, highways, and energy. The role involves leading design teams, coordinating with stakeholders, and ensuring compliance with engineering standards. The ideal candidate will have a degree ...

    Senior Product Engineer AI Driven SaaS Platform

    Intercom is seeking a Product Engineer to join their team in Greater London, focusing on delivering innovative customer solutions. In this role, you'll design and implement back-end and front-end systems, collaborate with product teams, and mentor other engineers. Candidates should have over 5 years of softwa ...

    Embedded AI Systems Engineer — Japan (Relocation + Visa)

    Icehouseventures is seeking an exceptional Application SW Engineer to join their Tokyo office, focusing on localizing and advancing their autonomous driving technology for the Japanese market. This full-time role involves software bring-up on customer hardware platforms, integration of drivers, and collaboration ...

    Senior Android Kotlin Engineer — Secure Mobile & DevOps

    CGI is seeking an experienced Software Engineer focused on Android development to join a dynamic project team in Greater London. In this hands-on role, you will design high-quality Android applications using Kotlin, integrate with backend services, and enhance mobile solutions. Candidates must have strong experi ...

    Senior .NET Engineer – Hybrid, High Impact & Growth

    Fruition Group is seeking a Senior .Net Software Engineer to impact technology-led projects in London. The role offers a hybrid work model requiring 1-2 days on-site. Candidates should have 5+ years of experience, expertise in C# and .NET 8, and familiarity with microservices tools like Docker and Kafka. The pos ...

    Staff Quality Engineer AI Driven Healthcare Platform

    Proximie is seeking a Staff Quality Engineer to join their Quality Engineering team in the UK. The ideal candidate will have over 10 years of experience in quality engineering, developing and maintaining automated testing frameworks, and ensuring compliance with healthcare regulations. Responsibilities include c ...

    Secure Cloud Platform Engineer (National Security)

    Forwardrole is looking for a DevOps Engineer to design, build, and evolve secure cloud platforms for complex National Security programs. This role involves working with software engineers and stakeholders to enhance automation, scalability, and secure delivery practices. You will manage CI/CD pipelines ...

    Building Physics Engineer: Cladding & Facades, London

    ASFD | Engineered Design in London is looking for a Building Physics Engineer to manage building physics deliverables for diverse projects. The role involves designing bespoke cladding systems and conducting thermal, condensation, and acoustic assessments. The ideal candidate will have a Bachelor’s deg ...

    Senior Full Stack Engineer – AI Platform, React/TypeScript

    Searchability® is seeking a Senior Full Stack Engineer to join their London team at a fast-growing AI startup. This role focuses on building scalable features using React and TypeScript, allowing you to own features end-to-end on their innovative AI-powered platform. With a startup-oriented environment ...

    Backend Engineer (Kotlin/JVM) – Hybrid, Relocation & Visa

    STARTmunich e.V is looking for a (Mid/Senior/Staff) Backend Engineer in London to build and test services using modern tools from the JVM ecosystem such as Kotlin, Spring, and Vert.x. You will design scalable cloud services and implement automated software delivery. This position offers hybrid working with 2-3 d ...

    Senior Backend Engineer Payments API & Architecture

    A leading payments technology company in Greater London is seeking an experienced software engineer to design and evolve their B2B API and payments infrastructure. The role emphasizes collaboration with product teams and a strong foundation in financial services. Ideal candidates will have at least 5 years of ex ...

    Senior Performance Test Engineer – Remote & Cloud Focus

    A leading technology services company based in Greater London is seeking a Senior Test Engineer to own performance testing across various projects. The role involves defining testing strategies, leading test execution, and providing insights for quality software delivery. Candidates should have over 3 years of e ...

    Senior Mobile QA Engineer – AI‑Driven Testing (Hybrid)

    Ports North is seeking a Senior QA Engineer for Mobile Applications based in London, UK, with a hybrid working model. In this role, you will ensure the quality of mobile products used by millions worldwide, requiring strong technical testing skills and familiarity with AI-driven practices. The ideal ca ...

    Remedy ITSM Engineer – Onsite 6 Month Contract (SC)

    Experis - ManpowerGroup is seeking a skilled Software Engineer for a 6-month contract based in Ipswich / London. This role involves maintaining and enhancing legacy Remedy ITSM platforms, assisting with migrations, and managing various server structures. The ideal candidate will have active SC clearanc ...

    Senior Frontend Engineer Next.js UI & AI Innovator

    Cint is looking for a Senior UI Software Engineer to enhance the Cint Exchange's Ordering platform. You will collaborate with UX designers and product managers to deliver high-quality, intuitive user experiences. You will build efficient frontend systems and optimize performance using Next.js and TypeScript. ...

    🚀 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 →

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