• United Kingdom Jobs Expertini profile avatar

    • Senior Lead Fullstack Engineer React Java Python Aiml Jobs in 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. Jobs
    4. Senior Lead Fullstack Engineer React Java Python Aiml Jobs in United Kingdom

    5. Download PDF

    Reset

    Create Job Alert
      Add Alert

     
     
    Create Alert
     
    Reset

    Senior Software Engineer Contract (Java, Spring Boot)

    Futureheads Recruitment | B Corp™ is seeking experienced Senior Software Engineers for multiple contracts across public sector organisations in England. Responsibilities include designing and enhancing scalable digital services, developing backend systems using Java and Spring Boot, and integrating APIs and micr ...

    Senior Java Engineer: Spring Boot, Microservices & Mentorship

    TPXimpact | B Corp™ is seeking a Senior Software Engineer to design, develop, and deploy high-quality software solutions in the UK. The successful candidate will lead complex projects, mentor junior engineers, and optimize CI/CD pipelines. Experience with Java, Spring Boot, and a strong grasp of Agile practices ...

    Senior Software Engineer

    Senior Software Engineer (Full-Stack)Permanent | Full-Time | Belfast (Hybrid Working) An established international insurance technology organisation is seeking a Senior Software Engineer to join its growing Belfast-based technology team. With a strong presence in the US ...

    Full Stack Engineer

    Get AI-powered advice on this job and more exclusive features. Direct message the job poster from SR2 | Socially Responsible Recruitment | Certified B Corporation™ Recruitment Consultant | SR2 - Socially Responsible Recruitment SR2 are currently looking for an experienced Full Sta ...

    Manager, Software Development (Node/Java, React) to lead product development for our payments industry client

    Manager, Software Development (Node/Java, React) to lead product development for our payments industry clientDuration: 6 Months (Extensions likely)Location: Hybrid (Toronto)Overview: Reporting to the Director, Technology Platform Design and Management, you wil ...

    Manager, Software Development (Node/Java, React) to lead product development for our payments industry client

    Manager, Software Development (Node/Java, React) to lead product development for our payments industry clientDuration: 6 Months (Extensions likely)Location: Hybrid (Toronto)Overview: Reporting to the Director, Technology Platform Design and Management, you wil ...

    Senior Java Engineer AI ready Cloud Platform

    Elsevier in the United Kingdom seeks a Senior Java Software Engineer II to enhance technology solutions for scientific publication. Responsibilities include designing cloud-hosted applications, collaborating with stakeholders, and improving project delivery processes. Candidates should possess solid experience w ...

    Senior Java Engineer: Spring Boot, Microservices & Mentorship

    TPXimpact | B Corp™ is seeking a Senior Software Engineer to design, develop, and deploy high-quality software solutions in the UK. The successful candidate will lead complex projects, mentor junior engineers, and optimize CI/CD pipelines. Experience with Java, Spring Boot, and a strong grasp of Agile practices ...

    Senior Software Engineer Contract (Java, Spring Boot)

    Futureheads Recruitment | B Corp™ is seeking experienced Senior Software Engineers for multiple contracts across public sector organisations in England. Responsibilities include designing and enhancing scalable digital services, developing backend systems using Java and Spring Boot, and integrating APIs and micr ...

    Senior Java Engineer: Low Latency Market Connectivity

    A leading technology company is seeking an experienced Java Software Engineer for a full-time role in London, England. The ideal candidate should have 10+ years of experience in core Java development and expertise in multi-threading, messaging techniques, and low latency trading systems. Education in Computer Sc ...

    Senior Java Platform Engineer – Trading & Analytics(Hybrid)

    A global technology-driven investment bank is hiring a Java Software Engineer to join their platform engineering team in London. The role involves working on systems that support trading, analytics, and risk operations. Candidates should have at least 3+ years of software engineering experience and strong Java p ...

    Senior Java Engineer Cloud Native Microservices (Hybrid)

    A leading recruitment agency is looking for an experienced Senior Java Engineer to join a fast-growing technology company in London. This hybrid position offers a salary up to £100,000 and requires strong experience in Java, Spring, and Kafka. Candidates should be proficient in building cloud-native microservice ...

    Senior Backend Engineer (Java) — Build a Unicorn

    A fast-growing tech company in the UK is seeking a Senior Consultant to join their innovating team. This mid-senior level position demands strong back-end engineering skills, adaptability, and a drive for impact. With a salary up to £120k and stock options, this is a unique opportunity for ambitious individuals ...

    Senior Full Stack Engineer (TypeScript & Python) Hybrid

    Atarus is a fast-growing FinTech organization in Greater London seeking an experienced engineer with 5+ years in designing large-scale systems. You'll work in a true hybrid model with no fixed days in the office, focusing on collaboration and continuous improvement. Benefits include 25 days holiday plus bank hol ...

    Senior Python Backend Engineer — Greenfield Apps & Equity

    Client Server is seeking a Senior Python Developer to work on innovative systems related to Arctic exploration in Cirencester. This role offers a salary up to £85k and the opportunity to design and develop data-centric applications. You'll be working in a close-knit team at a tech start-up, focusing on backend s ...

    Senior Python Systems Engineer Remote Functional Testing

    Mindrift is seeking a Senior Python Developer in Birmingham. This remote role focuses on testing and improving AI systems, requiring deep experience in functional testing, Docker, and Python. Responsibilities include creating black-box tests, managing Docker environments, and leveraging LLMs for development. Can ...

    Senior Python Data Platform Engineer Asset Management

    JPMorganChase is seeking a technology professional to design and deliver innovative solutions impacting Asset & Wealth Management. In this role, you will develop secure code, automate recurring issues, and lead evaluation sessions across teams. The position requires cloud analytics experience, advanced programmi ...

    Senior Python Backend Engineer – GCP & FastAPI, Hybrid

    Client Server is seeking a Python Software Engineer / Developer to join their team in Central London with the option for hybrid work. This role offers a competitive salary of up to £100k, joining a well-funded FinTech start-up that is focused on enhancing its core banking platform. The ideal candidate will have ...

    Senior Python Backend Engineer for SaaS & Scale

    Populus Select Ltd is seeking an experienced backend-focused developer in Tees Valley, United Kingdom, to support the evolution of a commercial SaaS platform used by enterprise clients. This hands-on role involves developing scalable backend functionality, improving system performance, and contributing to long-t ...

    Senior Quant Platform Engineer – Python & Trading Systems

    Harrington Starr is seeking a Senior Engineering Technologist to enhance their core analytics platform for trading. This role involves designing and building trading-critical systems, ensuring reliability and performance, while collaborating with traders and quants. Candidates should have over 5 years of softwar ...

    Senior Python Engineer Demo Data Automation (Flexible)

    Global Relay is seeking a Senior Python Software Developer in Greater London to join a dynamic team. In this role, you'll write Python and PowerShell scripts, automate demo data injections, and work closely with cross-functional teams for seamless software delivery. You need over 5 years of Python and 3 years of ...

    Senior Software Engineer Python, TypeScript and AWS

    External Description Overview Reach beyond with Liberty IT; for this is where you’ll find the super challenges, where you’ll be given the scope and the support to go further, dig deeper and fly higher. We won’t stand over your shoulder. We won’t get in your way. We certainly won’t hold yo ...

    Hybrid Senior Software Engineer Python/Django, Cloud

    A leading sustainability-focused organization in Birmingham is seeking a Senior Software Engineer to develop scalable software solutions and lead a delivery team. The ideal candidate will have strong expertise in Python and JavaScript, with experience in cloud environments like AWS or Azure. Responsibilities inc ...

    Senior Python Engineer Insurance Pricing Platform (Hybrid)

    Travelers Europe is seeking a Software Engineer in Greater London to enhance the hx Renew platform, a pricing decision intelligence tool. The role involves collaboration, mentoring junior engineers, and addressing complex engineering challenges. Successful candidates will bring strong programming skills, particu ...

    Senior Python Automation Engineer — Tools & Embedded QA

    A global media technology company is seeking a Senior Software Engineer to join their software automation team in Cambridge. This role involves building and maintaining automation frameworks and tools for embedded devices with a strong focus on Python and cross-functional collaboration. The ideal candidate has o ...

    Senior Python Backend Engineer (Hybrid) — Scale & Reliability

    A technology company is seeking a Senior Python Engineer in Ipswich for a hybrid role. This position involves designing scalable backend systems, owning features from discovery to deployment, and ensuring system reliability. The ideal candidate has proven Python experience, a solid understanding of APIs, and wor ...

    Senior Software Engineer — Python/Django, Own Backend

    A financial services firm in Greater London is seeking a skilled software engineer to develop and enhance their investment reporting platform. The successful candidate will have over 5 years of experience with Python and Django, be involved in the full software life cycle, and collaborate with various teams. Thi ...

    Senior Python Engineer Product Lifecycle Owner (Remote)

    A leading UK-based tech company is looking for a Senior Software Engineer to take full ownership of its software product. This role involves leading development projects from concept to deployment, focusing on quality and scalability. Candidates should have over 5 years of Python experience, strong cloud archite ...

    Senior Python Backend Engineer — AI Forward & Scalable

    A leading retail company in London seeks a Software Development Engineer III to drive high-quality backend service deliveries. This role combines end-to-end product ownership while integrating deeply with existing systems. Candidates should have extensive experience in Python, Fast API, and cloud technologies. Y ...

    Senior Python Engineer — MongoDB, Remote, Open Source

    Canonical Group Ltd is seeking a Senior Software Engineer specializing in Python and MongoDB to create a fully managed MongoDB solution. This role involves building reliable deployments on various cloud platforms and Kubernetes, significantly impacting the product and its ecosystem. The position offers a competi ...

    Senior Python Backend Engineer — Front Office Platform

    A leading financial services recruitment agency is seeking an experienced Python Engineer to contribute to a front office-facing platform within a tier-one investment bank. This role involves building backend services in Python, working on data-intensive workflows, and improving system design. Candidates should ...

    Senior Python Engineer, Cloud Native AWS & Serverless

    A modern financial services firm is looking for a Senior Python Engineer to join their team in the City of London. You will help redesign their technology stack to be cloud-native on AWS, focusing on Python-based services. The ideal candidate should possess solid experience in Python and database technologies, a ...

    Senior Python Engineer Remote/Hybrid Backend Architect

    A technology-focused company in Northern Ireland is seeking a Senior Python Engineer. This role involves designing and developing high-quality backend systems using Python and modern frameworks. The ideal candidate will have over 5 years of experience, strong problem-solving skills, and an understanding of cloud ...

    Senior Python Engineer Demo Data Automation (Flexible)

    Global Relay is seeking a Senior Python Software Developer in Greater London to join a dynamic team. In this role, you'll write Python and PowerShell scripts, automate demo data injections, and work closely with cross-functional teams for seamless software delivery. You need over 5 years of Python and 3 years of ...

    Senior Python & AWS ML Engineer Production Systems

    A leading financial services firm is seeking a Senior Software Engineer to engineer and deploy innovative machine learning solutions. The role involves collaboration with Data Scientists and development of cloud-based frameworks using AWS and Python. Key responsibilities include maintaining applications, leading ...

    Senior Frontend & Python Engineer – Hybrid Network Automation

    State Street is seeking a highly skilled senior developer in Greater London for full stack development of solutions to automate network technologies. Ideal candidates should have strong proficiency in Python and experience with web frameworks, RESTful APIs, and front-end technologies. The role is hybrid (4 days ...

    Senior Backend Engineer (Python) Hybrid, SC Clearance

    Oxford Dynamics Limited is seeking a Senior Backend Engineer to design and evolve scalable backend services using Python in London. This role involves building RESTful APIs, implementing security measures, and collaborating closely with engineering and product teams. You'll need strong experience in ba ...

    Senior Backend Engineer (Python, APIs) Mentor & Scale

    Stars Arena is seeking a Senior Backend Engineer in London, United Kingdom. The role requires expertise in Python and APIs, along with the ability to mentor team members. As a full-time position, the candidate must take ownership of projects and understand data management and infrastructure. This oppor ...

    Senior Software Engineer: Python/Django & TypeScript Architect

    Java Script Works in London is seeking a Senior Software Engineer to design, develop, and maintain robust software solutions using Python and TypeScript. The role involves optimizing existing systems through performance tuning and code refactoring. This full-time position offers competitive compensation and requ ...

    Senior ML Engineer Project Based (Python, GenAI)

    Mindrift is looking for machine learning specialists to engage in project-based AI tasks. Candidates should have over 5 years of experience, demonstrating proficiency in Python programming and statistical analysis. Your responsibilities include designing computational problems and verifying solutions using libra ...

    Senior Python Backend Engineer Remote iGaming APIs

    Burns Sheehan is seeking a Senior Software Engineer to join a rapidly scaling iGaming platform as a technical anchor for the backend team. This remote-first position requires strong backend engineering experience, particularly in Python, along with a proven ability in building production-grade APIs. The role inv ...

    Senior Software Engineer Python, TypeScript and AWS

    External Description Overview Reach beyond with Liberty IT; for this is where you’ll find the super challenges, where you’ll be given the scope and the support to go further, dig deeper and fly higher. We won’t stand over your shoulder. We won’t get in your way. We certainly won’t hold yo ...

    Senior Software Engineer Python (Perm, UK) UK

    Senior Software Engineer - Python (Perm, UK) UK Senior AI Python Engineer (Perm, UK, Remote with occasional travel to client site) This is a full-time, permanent opportunity for candidatesbased in the UK. There will be a need to travel to the office in London occ ...

    Senior Python Engineer — 6 Month Contract (London)

    Senior Python Engineer (6 Month Contract) London, United Kingdom Posted 9 months ago Responsibilities Senior Python Engineer to support an interesting project on a six‑month contract. The ideal candidate is able to ramp up quickly and get stuck in with the team. <h3 ...

    Senior Data/ML Engineer Python/Databricks/GCP

    Location: London DW Search are partnering on a high-impact contract opportunity within a fast-paced, data-driven environment supporting portfolio company initiatives for a major asset management firm. This role sits at the intersection of Data Engineering and Machine Learning Engine ...

    Senior Python Engineer Global Scale FinTech Backends

    JUXT is seeking experienced engineers to join our client projects in Greater London. You'll be responsible for engineering global scale software systems in banking, hedge funds, and other financial institutions. The ideal candidate should be a seasoned Python developer with experience in building transformati ...

    Senior Python Engineer – AWS, Terraform | Hybrid London

    Oliver Bernard is seeking a Senior Python Engineer in London to design, build, and maintain backend services in a hybrid cloud environment involving AWS and Terraform. The role includes developing CI/CD pipelines and collaborating with cross-functional teams. Ideal candidates will have extensive experience with ...

    Senior Python & Azure AI Engineer (Remote UK)

    A leading AI technology company is seeking a Senior Python Developer to work on an innovative AI platform utilizing Azure. This role involves building AI-first features, collaborating within a dynamic team, and requires strong skills in Python and Azure’s AI tools. The company offers a fully remote work environm ...

    Senior Backend Engineer Python/Django (Hybrid UK)

    A tech-driven finance company is seeking a Senior Back End Engineer to enhance systems that support its German operations. You will design and build backend services, automate workflows, and influence system architecture as part of a collaborative engineering team. The ideal candidate has extensive experience in ...

    Senior Frontend & Python Engineer – Hybrid Network Automation

    State Street in Edinburgh is looking for a highly skilled Senior Developer focused on network automation. You will develop solutions for network technologies using your expertise in Python and full stack application tools. Ideal candidates will possess strong skills in web frameworks, extensive experience with A ...

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

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

    To-Do Planner

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

    Open Planner →

    Wellbeing Center

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

    Check Wellbeing →

    Skill Coach

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

    Start Coaching →

    Outfit Helper

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

    Find Outfit →

    Income Tax Calculator

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

    Calculate Tax →

    Salary Benchmark

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

    Check Salaries →

    Interview Practice

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

    Start Practicing →

    Interview Predictor

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

    Predict Questions →

    Interview Practice Timer

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

    Start Timer →

    Behavioral Mastery

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

    Master Answers →

    Question Journal

    Confidentially record interview questions you were asked for future reference.

    Open Journal →

    Interview Ace

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

    Become an Ace →

    Q&A Logs

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

    View Logs →

    Application Planner

    Schedule and organize your job applications in one confidential planner.

    Open Planner →

    Cover Letter Tool

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

    Generate Letter →

    Resume Score

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

    Check My Score →

    ATS Score

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

    Check ATS Score →

    Application Analyzer

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

    Analyze Application →

    Career Visualizer

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

    Visualize My Career →

    Offer Genius

    Get intelligent insights and strategies to confidently negotiate job offers.

    Negotiate Offers →

    JobFlow

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

    Track My Flow →

    JobSense

    Our intelligent matching engine that provides smart job recommendations.

    Get Smart Matches →

    Networking Toolkit

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

    Build Network →

    Professional CV

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

    Use This Template →

    Executive CV

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

    Use This Template →

    Modern CV

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

    Use This Template →

    Creative CV

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

    Use This Template →

    Minimalist CV

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

    Use This Template →

    Europass CV

    The standard European Union recommended format for wide compatibility.

    Use This Template →

    Student CV

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

    Use This Template →

    Graduate CV

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

    Use This Template →

    Academic CV

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

    Use This Template →

    Developer/IT CV

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

    Use This Template →

    Skilled Worker CV

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

    Use This Template →

    Monochrome CV

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

    Use This Template →

    Art CV

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

    Use This Template →

    Harvard CV

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

    Use This Template →

    Volunteer Research

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

    Join Research →

    Review Us

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

    Share Experience →

    Register

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

    Create Account →

    Login

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

    Access Your Account →

    Profile Builder

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

    Build Your Profile →

    View Profile

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

    Preview Profile →

    Bookmarked Jobs

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

    View Saved Jobs →

    Your Reviews

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

    See Your Reviews →

    Following

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

    Manage Following →

    Find Companies

    Discover and research top employers in your country and industry.

    Discover Employers →

    Standalone CV Builder

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

    Build Your CV →

    PDF to DOC (Beta)

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

    Convert PDF →

    DOC to PDF (Beta)

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

    Create PDF →

    General FAQ

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

    Read FAQ →

    Job Seekers FAQ

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

    Get Help →

    Job Matching

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

    Learn How →

    Personalized Matching

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

    Learn More →

    Quick Apply

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

    Learn More →

    Alert Frequency

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

    Manage Settings →

    Job Alerts Guide

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

    Read Guide →

    Resume Matching

    Learn how our system matches your resume to job requirements.

    Learn More →

    Ethical Branding

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

    Read Guide →

    Candidate Visibility

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

    Increase Visibility →

    Verified Badge

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

    Get Verified →

    AI ATS Technology

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

    Learn More →

    ATS Ranking

    Understand how Applicant Tracking Systems rank you as an applicant.

    Learn More →

    Semantic Matching

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

    Learn More →

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

    Go to Your Dashboard →

      Senior Lead Fullstack Engineer React Java Python Aiml Jobs in United Kingdom Job Search Guide, Trends and Insights