• 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 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 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 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 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/Django Engineer (Django REST & Vue.js)

    Roc Search is seeking a Senior Software Developer in Melksham, UK, to join their development team. The role focuses on leading the development of core backend systems and involves designing, building, and maintaining web applications with a strong emphasis on Python and Django. Ideal candidates should have prove ...

    Senior Python Backend Engineer AI Sports Analytics

    Explore Group is partnering with a scaling start-up to hire an experienced Python Developer in Greater London. This role involves designing and building innovative products, shaping architecture, and contributing to technical decisions. The ideal candidate has over 4 years of experience in software development, ...

    Senior Python/Django Backend Engineer — AI Pricing

    Sanderson is seeking a Senior Django/Python Developer for a 6-month contract in Greater London. The role involves developing backend services for an AI-driven Smart Pricing program supporting a leading UK retailer. You will work closely with engineers and data scientists in an agile environment. Strong experienc ...

    Senior Backend Engineer (Python/Go) – Greenfield API

    NearTech Search is seeking a Senior Back End Developer (Python) in London with a hybrid work model. You will lead the development of a new data platform, define architecture, and design scalable backend systems. The role offers a competitive salary of £100,000 – £115,000, plus bonuses, private healthcare, and ca ...

    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 Engineer for AI Training (Remote)

    Prolific Academic Ltd is seeking Senior Python Developers to evaluate AI-generated code and ensure its accuracy. The role requires a strong background in software engineering and Python, alongside the ability to solve complex coding problems independently. Successful candidates will enjoy flexible remote work an ...

    Senior Test Automation Engineer – LabVIEW/C++/Python

    Plessey Semiconductors Ltd in Plymouth is seeking a Software Engineer to develop automated reliability testing systems for MicroLED devices. The ideal candidate will have a Master’s degree in Physics or Electronic Engineering, with proficiency in LabVIEW and C++. The role involves developing software tools for c ...

    Senior Python Engineer – Blockchain Scale up (Hybrid)

    A leading technology firm is seeking a Senior Software Engineer with expertise in Python and an interest in Blockchain. This hybrid role in Central London involves designing and building core backend software to support impactful real-world applications in sectors like public safety and financial systems. Candid ...

    Senior Backend Engineer: Python, AWS, Hybrid + Equity

    Taktile is looking for a Senior Backend Engineer to join the team in London. This role involves designing and operating backend services in Python on AWS, tackling scalability and reliability challenges. Candidates should have at least 5 years of experience, strong system design skills, and the ability to lead c ...

    Senior Full Stack Python/Django Engineer (Remote)

    Mongoose Gray is seeking a Full Stack Engineer to work in a fast-paced software environment in Greater London. The role offers a salary of £90,000 per year with benefits and remote working options. Responsibilities include developing front-end solutions with React and Typescript, building scalable back-end syste ...

    Senior Software Engineer, Trading Systems (C++/Python)

    DRW in Greater London is seeking a Software Engineer for the Cumberland Systematic team. This position involves designing and developing full-stack solutions for a global trading operation, focusing on high-frequency trading strategies. Ideal candidates will have extensive experience in C++ and Python, with a st ...

    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 Python Backend Engineer – Climate Tech (FastAPI)

    Victrays is seeking a highly motivated Backend Python Engineer to scale our product and infrastructure. This role involves designing robust backend services and collaborating with engineers to deliver quality customer experiences. The ideal candidate has 4+ years of experience, strong knowledge of Pyth ...

    Senior Python Engineer Data Pipelines & AWS (Edinburgh)

    Stars Arena is seeking a Senior Python Engineer located in Edinburgh, United Kingdom, to lead software engineering initiatives and build data pipelines. The ideal candidate should have extensive programming experience in Python and strong knowledge of Amazon AWS. This full-time role offers an opportunity for own ...

    Senior Python Data Engineer — AdTech & Data Platforms

    GroupM is seeking an experienced professional focused on developing and operating data-oriented solutions. Candidates should possess proven experience in AdTech technology, with strong expertise in Python and proficiency in SQL. Familiarity with tools and technologies including Airflow, Kafka, Snowflake, BigQuer ...

    Senior Python Engineer for AI Training (Remote)

    Prolific is hiring Senior Python Developers to join their Expert Network, focusing on training and evaluating cutting-edge AI models. Ideal candidates will have a BSc in Computer Science or a related field, extensive experience in Python, and will be responsible for reviewing AI-generated code, validating logic, ...

    Senior Python Systems Engineer Remote Functional Testing

    Mindrift is seeking a Senior Python Developer with over 5 years of experience, proficient in functional testing and Docker. Responsibilities include creating black-box tests for diverse codebases, managing Docker environments for reproducibility, and utilizing LLMs to improve code quality. This freelance role al ...

    Senior Backend Engineer (Go/Python) – Data Pipelines

    Renesas Electronics Corporation is looking for a Back-End Engineer in Cambridge to design and maintain systems and data pipelines for Octopart. The role involves deep technical challenges and high autonomy, with strong collaboration needed. Candidates should have over 5 years of web service development experienc ...

    Senior Python Tools Engineer — TDD & Scalable Tooling

    Stars Arena is looking for a Senior Tools Software Engineer based in London, United Kingdom. The ideal candidate must possess proficiency in Python programming, focusing on scalable, maintainable, and test-driven development. This full-time role involves effective communication with team stakeholders and ensu ...

    Senior Full Stack Python Engineer Commodities & Finance

    Verition Group LLC is seeking an experienced software developer in Greater London with over 6 years in full stack development. The ideal candidate will demonstrate proficiency in server-side Python programming and data analysis using libraries like Pandas, NumPy, and SciPy. A background in the financial industry ...

    Senior UI Infrastructure Engineer (C++/Python tooling)

    Roku, Inc. in Cambridge, UK is seeking a Senior Software Engineer to develop core features for its UI infrastructure. This role requires extensive experience with C++ and Python, alongside a strong ability to contribute to embedded UI framework development. You will collaborate closely with system architects ...

    Senior Python Engineer AI Model Training (Remote)

    Prolific is seeking a Senior Python Developer in the City of Edinburgh to join our Expert Network. You will contribute to training and evaluating AI models while ensuring code accuracy and adherence to Python best practices. The position offers a competitive pay rate of up to $50/hr and flexible workin ...

    Senior Python Engineer – HealthTech for Early Detection

    Stars Arena in London is seeking a Senior Python Engineer to join our HealthTech startup. You will play a crucial role in our mission to revolutionize health and enhance disease detection. We leverage cutting-edge technology for early detection and prevention of chronic diseases. The ideal candidate po ...

    Senior Backend Engineer Python/Django for FinTech

    A financial technology firm is seeking a Senior Backend Software Engineer to join their Investor Solutions team in Basingstoke, UK. The role involves collaborating with product owners and engineering teams to deliver innovative solutions within a complex, data-driven environment. Candidates should have extensive ...

    Senior ML Engineer — High Performance Python & HPC

    A technology company in the United Kingdom is seeking a Machine Learning Engineer to join their modeling engineering team. The role involves converting trading models into production systems, designing necessary tooling, and supporting strategy research and development. The ideal candidate will have a strong fou ...

    Senior AI Solutions Engineer Python, FastAPI, Azure

    A leading legal and professional services group in Birmingham is seeking an experienced AI Developer to design and deploy AI-powered applications. The role involves building scalable AI services using Python, FastAPI, and LLM APIs, along with deployment in Azure. The ideal candidate should have strong skills in ...

    Senior Software Engineer: Python & AWS Cloud Leader

    A leading tech firm seeks a Senior Software Engineer to join their innovative team, specializing in Python and AWS. The role offers opportunities to mentor junior developers while designing cloud-based software solutions that positively impact the company’s growth in the automotive tech industry. Competitive com ...

    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, 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 Climate Tech, Hybrid (Waterloo)

    Propel is seeking a Senior Python Engineer to join their climate tech startup. In this hybrid role, you will own features and systems from discovery through to production, working in a collaborative environment that values strong engineering skills and ownership. The ideal candidate should have experie ...

    Senior Python Engineer — GCP & FastAPI | Hybrid London

    Client Server Ltd. is seeking a Senior Software Engineer (Python GCP FastAPI) to join their talented tech team in London. This role offers a competitive salary up to £100k and flexibility to work from home twice a week in a hybrid model. As a key member of a growing FinTech start-up, you'll work on enhancing ...

    Senior Embedded Security Software Engineer (C/Python)

    A security solutions company in Cambridge seeks a Senior Software Developer skilled in C and Python for embedded systems. Responsibilities include designing and testing next-gen cryptographic Hardware Security Modules. Candidates should have a degree in a relevant field and experience in Linux environments. This ...

    Senior Automation Engineer (Python, LLM, Spark, ETL)

    Role Overview We are seeking a highly skilled Senior Automation Engineer with expertise in Python, Large Language Models (LLMs), Spark, and ETL development. The role focuses on building intelligent automation solutions, scalable data pipelines, and integrating AI capabilities into en ...

    Senior AI Engineer Python LLM Finance Consultancy

    Senior AI Engineer (Python LLM MLOps) London / WFH to £90k</str ...

    Senior Platform Engineer I Database Platform Python

    Job DescriptionYou’ll work on high-scale systems used by hundreds of engineers, shaping how we run databases globally through automation, observability, and platform thinking - developing the internal database platform, automation, and tooling that powers hundreds of databases across multiple enviro ...

    Data Engineer III Python, Databricks Senior Associate

    Are you ready to shape the future of data engineering at JPMorgan Chase? Join a dynamic team where your unique skills will help build innovative solutions and contribute to a winning culture. You’ll have opportunities for career growth, collaborate with talented professionals, and make a real impact on our bu ...

    Senior Full Stack Engineer C# Python AWS

    Senior Full Stack Engineer / Developer (C# Python AWS SQL IaC) London 12 month FTC to £180kAre you a full stack technologist with a product based mindset?You could be progressing your career in a hands-on Senior Full Stack Engineer role at a tech driven, global Asset Manager with multiple ...

    Senior AI Engineer Python LLM Finance Consultancy

    Senior AI Engineer (Python LLM MLOps) London / WFH to £90kAre you an experienced Software Engineer with a strong knowledge of AI, LLMs and agentic coding?You could be progressing your career at a global finance technology consultancy, working with clients including global Investment Banks ...

    Senior Data Engineer (AI & MLOps, AWS, Python)

    Senior Data Engineer (AI & MLOps) – Software – Newcastle/Hybrid or RemoteDay rate: £300 – £500 (Inside IR35)Duration: 6 months Start: ASAP My new client is looking for a Senior Data Engineer with expertise in AI, MLOps, and AWS architecture to design and deliver production- ...

    Senior Python Engineer – AI Utilities Scale Up

    Job Description The Role As a senior python engineer, you will join a start-up where the culture of delivery, agile, and accountability is second nature. You’ll join a small team where everyone in the business has an impact on a daily basis and you are given accountability f ...

    Senior Full Stack Engineer C# Python AWS

    Senior Full Stack Engineer / Developer (C# Python AWS SQL IaC) London 1 ...

    Senior Platform Engineer I Database Platform Python

    Job DescriptionYou’ll work on high-scale systems used by hundreds of engineers, shaping how we run databases globally through automation, observability, and platform thinking - developing the internal database platform, automation, and tooling that powers hundreds of databases across multiple enviro ...

    Senior AI Engineer Python LLM Finance Consultancy

    Senior AI Engineer (Python LLM MLOps) London / WFH to £90k</str ...

    Senior Data Engineer: Databricks, Python & AI Enablement

    A leading global financial services firm is seeking a Data Engineer - Senior Associate in Bournemouth. This role involves designing and optimizing data pipelines and leveraging Python and Spark on Databricks. The successful candidate will collaborate with Data Architects and Business Analysts to deliver complian ...

    🚀 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