• United Kingdom Jobs Expertini profile avatar

    • 2,335,978+ Full Stack Software Engineer Javascript React Elixir Jobs in UK — Top Companies Hiring July 2026

    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. Full Stack Software Engineer Javascript React Elixir Jobs in United Kingdom

    5. Download PDF

    Reset

    Create Job Alert
      Add Alert

     
     
    Create Alert
     
    Reset

    Senior Ruby on Rails Engineer — AI Health Platform

    Jack and Jill AI is seeking a Senior Software Engineer to design scalable backend architectures using Ruby on Rails. You'll work in a collaborative and high-autonomy environment at the forefront of health-tech, integrating AI-driven insights into personalized health journeys. The role offers a wellness-focused c ...

    Senior Data Platform Engineer (Trading Systems)

    A leading Investment Manager in the UK is seeking an experienced Software Engineer for an initial 6-month role that could lead to permanent employment. The position involves working within a core engineering team to develop and enhance data and infrastructure platforms supporting systematic trading strategies. T ...

    Senior Electrical Engineer – High Voltage & Critical Systems

    Ramboll is seeking a Senior/Principal Electrical Engineer to join their Critical Systems Team in Southampton. This role involves providing electrical design expertise, particularly in high voltage systems, while mentoring junior staff and managing project work. The ideal candidate will have a track rec ...

    Platform Engineer – Fintech Cloud & Automation

    A leading financial services firm in the UK seeks a Platform Engineer to join the platform team. The role focuses on developing secure, high-quality production code and deploying Kubernetes applications. Ideal candidates should possess hands-on experience in software engineering and cloud technologies. The compa ...

    Senior AI Driven Engineer | Build Autonomous Ad Engine

    Adzact in the United Kingdom is seeking a Senior Engineer to build an autonomous B2B ad engine. This role focuses on developing core platform systems and involves working with cutting-edge technologies like Python, AWS, and Docker. Candidates should have over 5 years of software delivery experience and an owners ...

    Senior AI Engineer — Human Centric LLM & Systems

    A cutting-edge AI development company is seeking a Senior Software Engineer to work in a hybrid role in London. This position focuses on developing innovative AI solutions, requiring deep proficiency in TypeScript and a background in disruptive technologies. The ideal candidate will enjoy building intelligent sy ...

    Senior Embedded UI Engineer for Live Streaming

    A leading streaming platform seeks a Senior Software Engineer to innovate on core features for the Roku platform. You'll enhance user experience through embedded UI development and work on complex features with a talented team. The ideal candidate is experienced in embedded C++ and Typescript, understands core O ...

    Senior Cloud Infra Engineer Go & Kubernetes

    A leading tech company in Greater London seeks a Cloud Infrastructure Software Engineer to design and maintain Golang services for their streaming data platform. You will ensure the performance and availability of the cloud infrastructure and work alongside other engineers to build a powerful PaaS application. T ...

    Senior Lead Backend Engineer – Services (Hybrid, London)

    Capital One (Europe) plc is seeking a Senior Software Development Engineer in London, UK. This role involves leading a backend team in delivering complex projects and requires proven technical leadership and exceptional programming skills in modern OO languages, preferably Java. The position offers a hybrid work ...

    Senior Platform Engineer — High Performance Trading

    A technology firm focusing on trading platforms is looking for a Senior Software Engineer to enhance its trading platform. The role involves architecting solutions, optimizing performance, and ensuring system stability. Candidates should have deep experience with mission-critical distributed systems and be skill ...

    Senior C#/.NET Engineer for Risk Systems (Hybrid London)

    A financial services vendor in Central London is seeking a Senior Software Engineer with expertise in C# and .NET to join their dynamic team. The role involves immediate contributions to web application design and development, while also fostering collaboration and innovation. Ideal candidates have experience wi ...

    Principal Platform Integration Architect

    Broadridge Financial Solutions is searching for a Principal Development Engineer in London. This role will involve contributing to the technical architecture and integration design of the enterprise platform. The successful candidate will be responsible for project scoping, technical architecture documentatio ...

    Senior Backend Engineer — SaaS Banking Platform

    A technology firm in banking is seeking a Senior Software Engineer to lead projects and contribute to their award-winning platform. You will work primarily with Java and be involved in building new features and internal tooling. The ideal candidate has experience in cloud technologies like AWS and GCP, understan ...

    Senior Go Engineer – Kubernetes Security & WAF

    Cisco Systems is seeking a Senior Software Engineer to develop a Go-based control plane for traffic security in Kubernetes environments. You will be responsible for building and enhancing the management of an eBPF datapath, ensuring security in cloud and hybrid enterprise scenarios. The ideal candidate will have ...

    Senior Ruby on Rails Tech Lead – Build, Guide & Influence

    A leading experience commerce platform in London is seeking a Senior Software Engineer to develop core services and mentor team members. This role involves building and maintaining Ruby on Rails applications, optimizing performance, and collaborating with product leaders on technical strategies. The ideal candid ...

    Senior Ruby on Rails Engineer & Tech Lead

    Easol Trading Limited is seeking a Senior Software Engineer in Greater London to develop core services and mentor engineering talent. This role involves building and maintaining Ruby on Rails applications, leading teams, collaborating on product development, and ensuring high-quality engineering practices. You w ...

    Senior JVM Kotlin Backend Engineer (Hybrid, London)

    A leading technology firm is seeking a Senior Software Engineer to design and build essential backend services for a scalable marketing platform. The role requires a strong foundation in JVM-based development, preferably Kotlin, along with robust SQL experience and knowledge of automated testing. You will collab ...

    Senior Backend Engineer, Flights Booking (Hybrid/Remote)

    On the Beach is looking for a Senior Software Engineer to join their Flights Booking team in Manchester. You will build scalable backend systems to connect customers with flight providers and ensure a seamless booking process. This role requires strong skills in distributed systems and operational exce ...

    Senior C# Engineer for Greenfield Trading Systems

    An innovative proprietary trading firm in London is looking for a Senior C# Software Engineer. You will work on greenfield projects and use cutting-edge technology to influence trading systems. The ideal candidate will have a strong background in C# and .NET, alongside experience with database technologies such ...

    Senior UI Engineer, Subscriptions (Typescript)

    Roku, Inc. in Cambridge is seeking a Senior Software Engineer to pioneer development for the Roku platform. You will develop core features for the Roku Channel app and work closely with multiple teams including Product Development and UI/UX design. The position demands strong experience in Typescript, ...

    Lead Backend Engineer — Cloud, APIs & Scalable Services

    Capital One UK is looking for a Lead Software Development Engineer to join their backend team in London on a hybrid basis. The role involves leading projects, ensuring technical design, and collaborating with stakeholders to achieve business outcomes. You will leverage your experience in backend servic ...

    Senior .NET Engineer: Microservices & Cloud (Hybrid)

    A leading financial services company based in the UK seeks a Senior Software Engineer to be part of the core engineering team. This hybrid role involves driving the technical transformation of a large system into a microservices architecture. Candidates should have over 6 years of experience, strong skills in C# ...

    Senior Endpoint DLP Engineer (Kernel/Go/C)

    A leading cybersecurity firm based in London is seeking a Senior Software Engineer to develop and enhance the FortiDLP endpoint agent. The role involves implementing new features, maintaining current functionality, and ensuring high coding standards. Candidates should have strong programming skills in languages ...

    Autonomy Data Engineer: Scale AI Pipelines on AWS/Databricks

    A leading electric vehicle manufacturer in Greater London is seeking a Senior Software/Data Engineer to enhance their analytics data platform. This role requires extensive experience in data engineering, specifically with AWS services and Databricks. The successful candidate will develop and scale data analytics ...

    Senior Android Engineer Digital Identity & Fintech Impact

    A leading global financial services firm is seeking a Software Engineer III - Android to join their dynamic team in London. This role involves developing customer-centric products, collaborating with cross-functional teams, and ensuring high code quality. Ideal candidates will have a Bachelor's degree in Compute ...

    Staff Backend Engineer — Data Lakehouse & Data Integration

    Blumberg Capital Company seeks a Staff Backend Software Engineer to join our Partner Platform team. This role focuses on building scalable data integration pipelines and contributing to critical engineering projects impacting clients and internal teams. Ideal candidates will have strong programming ski ...

    Senior Java Engineer Real Time Payments & Reactive

    Icon Solutions, located in Greater London, is looking for an experienced Software Engineer with a solid product engineering background. You will be pivotal in delivering a cutting-edge solution for real-time payment processing, working hands-on to solve complex challenges. The ideal candidate should ha ...

    Senior Storage & Compute Reliability Engineer

    A leading financial technology firm in London is seeking a Senior Software Engineer for their Storage and Compute Stability Team. This role focuses on ensuring reliability, performance, and security of cloud infrastructure while collaborating with cross-functional teams. Candidates should have strong programming ...

    Senior QA Engineer: Remote, Impactful Test Leader

    A global security solutions company in Greater London is seeking a Senior Software Test Engineer with over 5 years of experience. In this role, you will oversee the planning and execution of testing activities within cross-functional teams, focusing on test automation and quality engineering. You will work with ...

    Senior SDET: Architect Global Testing Frameworks (Remote)

    BR-DGE in Edinburgh is seeking a Senior Software Development Engineer in Test to build and scale our automated testing infrastructure. The role focuses on engineering systemic solutions that allow development teams to own their quality and deploy safely. Ideal candidates are passionate about infrastruc ...

    Senior Android Engineer (Java/Kotlin) – REST & TDD Expert

    Job Opportunity: Principal Android Developer We are currently seeking a hands-on Principal Android Developer with deep experience in Android application development. The ideal candidate should have excellent skills in Java and Kotlin, as well as a solid understanding of REST APIs, JSON, and TDD/B ...

    Remote Roblox Engineer Live Sports Gameplay

    Voldex is seeking a Software Engineer to join the NFL Universe Football team, focused on delivering engaging live content. This role offers the opportunity to build high-quality gameplay systems that impact millions of players. You will work in a fast-paced environment, collaborating with various teams ...

    Staff Firmware Engineer Embedded IoT for Medical Devices

    A medical technology company is seeking a Staff Firmware Engineer to lead the development of firmware for connected wound therapy devices. This role involves developing algorithms in an embedded-C environment and collaborating with cross-functional teams. Candidates should have at least 8 years of experience, wi ...

    Applied AI Engineer II Production ML & Generative AI

    A global financial institution is seeking a Software Engineer II - Applied AI to drive AI innovation and optimize business processes through advanced machine learning. You will lead the development of AI-powered products, collaborate extensively, and ensure the scalability of AI solutions. Ideal candidates will ...

    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 ...

    Senior DevOps Lead — Azure, Kubernetes & CI/CD Expert

    Cpl Life Sciences in Colchester is seeking a Lead DevOps Engineer to take ownership of their DevOps capability. The role involves enhancing engineering velocity, scalability, and security in cloud infrastructure and software delivery. Responsibilities include leading DevOps strategy, optimizing cloud environment ...

    Generative AI Engineer Cloud, LLMs & Automation

    A leading tech company in Greater London is seeking a Software Engineer to build and iterate on Generative AI solutions. The role involves partnering with product managers and non-technical users to develop high-impact AI use cases, design user-facing products, and build LLM-based applications on cloud platforms ...

    Senior Fullstack Engineer — AI‑Driven Internal Tools (Remote)

    PC Games Insider is seeking a Senior Software Engineer in Greater London to build and enhance their internal back office platform. The ideal candidate brings over 5 years of engineering experience, strong skills in Python and frontend technologies like Vue, and a passion for AI and automation. This role requires ...

    Lead AI & Markets Tech Engineer (Credit Pre Trade)

    JPMorgan Chase & Co. is looking for a Lead Software Engineer to work within Credit Technology. This role involves building AI-native systems and enhancing trading capabilities through various technical solutions. Candidates should have over 5 years of hands-on experience with programming languages like Python, J ...

    Real Time Risk & P&L Tech Lead — Python & Cloud

    J.P. MORGAN in Greater London seeks a Senior Lead Software Engineer to architect real-time risk and P&L systems for Global Credit Trading. You will lead technical direction, collaborating closely with trading desks and quantitative analysts to deliver innovative solutions that enhance market performance. ...

    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 ...

    Lead Rust Engineer Low Latency Robotics (Hybrid UK)

    A leading technology scale-up in the UK is seeking a Lead Rust Engineer to architect high-performance systems for aerial intelligence. In this hybrid role, you'll work with a team to develop software for coordinating robotic platforms, utilizing your experience with Rust and asynchronous frameworks like Tokio. I ...

    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 ...

    Lead Platform Observability Architect

    A global banking leader in Greater London is seeking a Lead Software Engineer to enhance developer experiences by creating scalable observability tools. The ideal candidate will possess significant experience in system design and management of telemetry data. Responsibilities include collaborating with developme ...

    Senior Node.js Engineer — CMS & Platform (Hybrid)

    LeoVegas Group is seeking a self-driven Senior Software Engineer to join the CMS team. The role involves developing key features, writing maintainable code in an agile environment, and mentoring peers. Key qualifications include experience in Node.js, object-oriented programming, and API development. The positio ...

    Senior Test Automation Engineer — Remote & AWS CI/CD

    CACI Ltd is seeking a Senior Test Automation Engineer based in Bromley, UK. This role involves ensuring the quality and reliability of software products through automated testing solutions. Responsibilities include designing automation strategies, collaborating with cross-functional teams, and mentoring junior e ...

    Platform Security Engineer — Secure SDLC & Cloud Guard

    Gear4music Ltd. in the United Kingdom is looking for a passionate software engineer dedicated to security, to collaborate across teams to ensure secure applications and services. You will work within a supportive culture that values individual growth and team success. The ideal candidate will have expe ...

    Hybrid Cyber Security Engineer – IAM, IaC & Secure SDLC

    Redgate Software is seeking a Cyber Security Engineer to design, build, and operate security controls. This role entails investigating security issues and working alongside teams to enable secure delivery of products. The ideal candidate should possess hands-on security experience, strong IAM knowledge, and fami ...

    Senior Electrical Engineer Hybrid & Growth

    A leading engineering and professional services firm in the UK is seeking a Senior/Principal Electrical Engineer for their Leeds office. The successful candidate will deliver complex MEP projects, mentor junior staff, and ensure client expectations are met. Candidates should have a strong background in MEP desig ...

    Senior Platform Engineer — Greenfield Data Platform Hybrid

    Baringa is looking for a Senior Platform Software Engineer to join the Data and Processing Platform team in Greater London. This role involves shaping the design and ongoing support of a greenfield Data and Processing Platform, engaging closely with teams to enhance capabilities. The ideal candidate sh ...

    🚀 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 →

      Buffering Video...

      Full Stack Software Engineer Javascript React Elixir Jobs in United Kingdom Job Search Guide, Trends and Insights