2,202,960+ Full Stack Software Engineer Javascript React Elixir Jobs in UK — Top Companies Hiring June 2026

Professional job seekers finding United Kingdom jobs through Expertini
750,000+ professionals on Expertini 750,000+ Candidates
Join our global community
Expertini Penguin Mascot Resume Score™
Resume Score™ Instantly
Upload Your CV
Quick 30-second process

Apply Today & Jumpstart Your Career on Expertini, Trusted Since 2008.

Reset

Create Job Alert

 
   
Reset

Senior Performance Controls Engineer – UK

Canadian Solar SSES (UK) Ltd. is seeking a Senior Performance Controls Engineer to join their team in Greater London. The successful candidate will troubleshoot complex issues and drive corrective actions during facility operations. This role demands a detail-oriented individual with a strong analytica ...

Founding Solutions Engineer – Fintech Payments (Hybrid)

A leading fintech company is seeking a Founding Solutions Engineer to join their hybrid team in London. This role offers the opportunity to define technical partnerships and deliver solutions in the fast-evolving world of card payments powered by stablecoins. Candidates should have 5–10 years of experience in so ...

Senior Mechanical Engineer | BIM & Building Services Lead

A leading engineering consultancy in Manchester is seeking a Principal Mechanical Engineer to join their MEP team. This role involves leading mechanical design projects and managing engineers, ensuring compliance with both client requirements and industry standards. Candidates should have significant experience ...

Senior Design Engineer – Foundations for Major Infra (FTC)

Bouygues Construction is looking for a Senior Design Engineer to deliver foundation design solutions for temporary and permanent works across major projects in Ipswich, UK. This role emphasizes technical excellence and accountability, making use of specialist software to produce safe and efficient designs. </ ...

ML Engineer, Privacy‑Preserving Photo AI

APPLE in Cambridge is seeking an experienced Machine Learning Engineer to develop privacy-respecting AI algorithms for Photos. You will contribute to enhancing the best photo app experience worldwide as part of a collaborative team. The ideal candidate will have a strong background in machine learning, ...

Principal GenAI & ML Architect for Production AI

Anaplan Inc is looking for a Principal Machine Learning Engineer in Greater London. In this role, you will lead the architecture, design, and deployment of scalable AI systems. Your work will empower business users to leverage GenAI within their planning workflows, demanding both deep ML knowledge and softwar ...

Senior Java Platform Lead – Hybrid & Scalable Microservices

A leading streaming technology company is seeking a Senior Software Engineer to join their team in Greater Manchester. This role involves designing and developing scalable web applications and collaborating with cross-functional teams. Candidates should have extensive experience in Java and Python, a background ...

AWS DevOps Engineer Flexible, Cloud & CI/CD

IBM is seeking an AWS DevOps Engineer to join their Client Innovation Centers in Cheltenham, UK. The successful candidate will enhance DevOps capabilities by automating software delivery pipelines and guiding junior engineers. Key responsibilities include managing CI/CD pipelines, utilizing Infrastructure as Cod ...

Europe Payments Engineer – Open Banking & APIs

Plaid is looking for a Software Engineer to join their Europe team in Greater London. In this role, you will develop and enhance Europe-specific payments and credit products, working closely with diverse teams across the company. Responsibilities include iterating on new products, understanding client needs, ...

Senior Platform Engineer: Build Scalable Cloud Platforms

A leading technology firm in Budock Water is looking for a Senior Platform Engineer to lead the design of key components in a modern digital service platform. You will collaborate with various teams, ensure high-quality software delivery, and contribute to significant projects in Defence and National Security. I ...

Gen AI Platform Architect

A global leader in animal health is seeking a highly motivated individual for an exciting role in their new enterprise platform engineering team. Located in Hook, UK, this position focuses on Generative AI capabilities. Candidates should have 8+ years of experience as a Software Engineer, with strong skills in P ...

Senior Mechanical Design Engineer (MEP) – Lead Projects

IN2 Engineering Design Partnership based in Belfast is seeking a Senior Mechanical Design Engineer to lead mechanical design projects. You'll collaborate closely with clients on various sectors including commercial and healthcare, ensuring high-quality engineering solutions. The role offers flexible hours and ...

Senior AI Product Engineer Document AI & LLMs

Puma Energy is seeking a Senior Product Engineer to develop AI applications that enhance trading operations. In this hands-on role, you'll create robust backend services and build efficient document processing systems, collaborating with both technical teams and stakeholders. The ideal candidate will h ...

Hybrid Electronic Systems Engineer Systems Design

A leading defense company based in Bolton seeks an experienced Electronic Systems Engineer. In this role, you will transform complex requirements into integrated hardware solutions and produce high-quality documentation and schematics. You will collaborate closely with mechanical, firmware, software, and manufac ...

Senior Mechanical Design Engineer — Nuclear & Defence

Carrington West is looking for a Senior Mechanical Design Engineer to join our team in Derby for a 12-month contract. This role focuses on high-impact projects in the nuclear and defence sectors, allowing the opportunity to mentor junior engineers and contribute innovative solutions. The successful can ...

Lead HVDC Modelling & Control Engineer

A leading energy firm in Stafford is looking for a Lead Engineer to oversee the design and development of HVDC Control Systems. You will guide a dynamic engineering team, focusing on control techniques and application software development for HVDC schemes. The ideal candidate has an engineering degree in power s ...

Industrial Electrical Design Engineer

A leading industrial equipment manufacturer in the United Kingdom is seeking an Electrical Design Engineer in Droitwich Spa. This office-based role is ideal for those who excel at converting engineering concepts into precise electrical drawings while supporting the creation of high-quality systems. Key responsib ...

Hybrid Mechanical Design Engineer Production Ready

ASSA ABLOY Global Solutions in Olney is searching for a Mechanical Design Engineer to drive the design and development of innovative products. This role offers a combination of on-site and remote work, allowing for flexibility while fulfilling hands-on design requirements. The ideal candidate will have ...

Electronics Design Engineer Sensors & Mixed Signal R&D

A leading instrumentation manufacturer in Guildford is seeking an Electronics Design Engineer to join their R&D team. The successful candidate will design and develop analogue and digital circuits for various regulated industries. Key responsibilities include PCB design, prototyping, testing, and working with so ...

Onsite Test Engineer – DevSecOps & AI/ML

A leading defense technology firm is seeking a Test Engineer to join their team either in Gloucester, Manchester, or London. You will apply your test skills in an Agile delivery team, responsible for creating and maintaining automated test frameworks. The role requires knowledge of Agile/Scrum environments and e ...

Graduate Test Engineer — Onsite Training & Accreditations

A leading change management firm in the UK is looking for a Graduate Test Engineer to ensure the quality and reliability of critical software systems. This role involves supporting test planning and execution while collaborating with engineers and analysts. Ideal candidates should demonstrate strong analytical s ...

Senior RF & Signature Reduction Engineer – Barrow (On site)

Gold Group is looking for an experienced RF Engineer in Barrow-in-Furness to lead the development of advanced stealth capabilities. You will work on radar, infrared, and visual signature reduction, contributing significantly to the UK's defence. Key responsibilities include collaborating with teams, defining ...

Senior DevOps Engineer | AWS, Kubernetes & CI/CD Expert

Tain is seeking a DevOps Engineer based in Greater London, UK, to enhance our development processes and maintain the resilience of our cloud infrastructure. You will oversee global cloud operations, ensuring high availability and performance. The ideal candidate has at least 5 years of experience, particularl ...

Staff Backend Engineer Distributed Systems & Lakehouse

A leading data and AI company in Greater London is seeking an experienced Software Engineer to join as a founding member of their London site. The role involves tackling complex technical challenges across various domains and contributing to the development of scalable, secure services. Candidates should have ov ...

Green Tech Python Fullstack Engineer (AWS)

A leading energy-tech company in the Greater London area is seeking a Python Software Engineer to join their core product team. The ideal candidate will work in a hybrid environment, resolving critical engineering challenges in a fast-paced green tech setting. They will have ownership over design decisions, cont ...

VP, Low Latency Trading Systems Architect

Citi is seeking a Software Engineer in London to join the Equities Electronic-Execution technology team. This role involves designing and developing next-generation low-latency execution platforms that encompass algorithmic trading and market data processing. The candidate will collaborate with a cross ...

Senior Platform Engineer Cloud Infra & Scaleouts

Cogna, located in Greater London, is on the lookout for a seasoned Platform Engineer to join their innovative team. The ideal candidate will have over 10 years of cloud platform experience, a strong software engineering background, and expertise in tools like Terraform and Kubernetes. This role offers a unique o ...

ML Systems Research Engineer (Hybrid) London

A leading AI research firm is seeking a passionate Software Engineer for a hybrid role in King's Cross, London. The position focuses on advancing machine learning and AI technologies, with responsibilities including conducting cutting-edge research and collaborating with cross-functional teams. Candidates should ...

Backend API Engineer | Remote, Equity, Travel Allowance

Duffel is hiring a Software Engineer to join their team in London. This role is focused on building tools for travel distribution and booking through a seamless API. You will work on the core API that powers millions of travel bookings, ensuring high standards in design and developer experience. This p ...

Automation QA Engineer – End to End & Integrations

A technology solutions firm in England is looking for a skilled software quality assurance engineer to collaborate with cross-functional teams. The ideal candidate will have a Master's degree in computer science, strong experience in QA automation, and proficient in SQL. Responsibilities include creating test st ...

Senior AI Engineer Production Grade LLM & Agent Systems

A financial services company in Greater London is seeking a Senior AI Engineer to design and deliver AI systems integral to their business processes. This hands-on role involves building production-grade solutions utilizing LLMs and agentic systems, contributing significantly to the technical direction and archi ...

Senior Automation QA Engineer Remote & Flexible

A leading technology solutions provider in Northern Ireland is seeking a Software Engineer in Test to join their agile team. The ideal candidate will have experience in both manual and automated testing across various frameworks. This role offers a comprehensive benefits package focused on employee wellbeing, ca ...

Senior Traffic Engineer: Shape Future Transport

A leading engineering firm is seeking a Senior / Principal Traffic Engineer to shape future transport solutions in Birmingham. This role involves delivering robust transport strategies and mentoring junior engineers while ensuring compliance and safety. With a hybrid working model, you will guide multidisciplina ...

Senior DevOps Lead: Automate, Deploy & Scale in AWS

IF1874 GE Energy Power Conversion UK Limited is looking for a Lead DevOps Engineer to enhance the software development lifecycle through automation and collaboration. Responsibilities include managing CI/CD pipelines, optimizing cloud environments (primarily AWS), and mentoring junior engineers. The id ...

Senior Test Engineer — Automate Quality in Cloud Apps

Kainos is looking for a Senior Test Engineer to join their agile team in Belfast, Northern Ireland. In this role, you will develop and execute tests to ensure that application software meets user needs, while also learning new technologies. Kainos is committed to a people-first culture that values diversity a ...

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

JPMorganChase in Greater London seeks a Senior Lead Software Engineer to innovate in Global Credit Trading Technology. You will architect real-time risk and P&L systems, collaborating with traders and analysts to enhance trading platforms while ensuring low-latency performance. The ideal candidate has ...

Site Reliability Engineer for Trading Platforms

Barclays is seeking a Site Reliability Engineer based in London to oversee the reliability and performance of systematic trading algorithms within the Equity Derivatives business. You will implement software engineering techniques and automation in incident response to enhance system availability and scalability ...

Senior QA Engineer in London Blackwall

Job Description Our company is currently seeking a skilled individual to join our team as a Software Test Engineer. The primary focus of this role will involve working on pipelines for high-performance backend services. Key Responsibilities: Design, update, and execute automated ...

Senior Test Development Engineer (LabVIEW)

Senior Test Development Engineer Location: Glenrothes or Livingston About the role: Responsible for the design, manufacture, verification and validation, along with through life technical support of board level, sub-system and system level test equipment. Skills: • Test software design <br ...

Senior Structural Design Engineer – Civil & Temporary Works

Energy Jobline CVL is seeking a Senior Design Engineer located in Blackfriars, London. This role involves leading the detailed structural design of both temporary and permanent works, alongside providing technical support. Ideal candidates will possess significant experience in structural engineering, ...

Senior Sales Engineer – Telco & Utility Solutions

IQGeo is looking for a Senior Sales Engineer to provide technical expertise and support to the UK Sales team. In this customer-facing role, you will assist in the sales process by defining customer requirements and demonstrating how IQGeo’s software solves real-world problems. You will partner with acc ...

Senior Puppet Sales Engineer (EMEA) — French Required

Perforce Software is looking for an experienced Senior Sales Engineer to join their Puppet team in the EMEA region. The role requires technical skills and sales acumen, partnering with account executives to close opportunities. Responsibilities include conducting customer discovery, customizing presentations, ...

Production ML Engineer: Scale AI with Impact

Gravity Engineering Services Pvt Ltd. is looking for a Machine Learning Engineer to develop bespoke AI solutions for diverse clients. You will play a crucial role in transitioning machine learning from the lab to real-world applications, focusing on scalable architecture and best practices. Your respon ...

Senior Staff Engineer Architecture & Tech Leadership

A popular wine company in the UK is seeking a Senior Staff Engineer to lead architectural and technical strategy across teams. This hybrid position in Norwich or London requires over 10 years of software engineering experience, strong leadership abilities, and a focus on improving performance and reliability. Th ...

Water Infrastructure CAD Technician & Project Engineer

AF ECO Ltd, located in Havant, is looking for a CAD Technician / Project Engineer to support water and wastewater projects. The role involves preparing design drawings and developing technical solutions while collaborating closely with the design engineering team. The ideal candidate should be proficie ...

ML Engineer, Privacy‑Preserving Photo AI

APPLE in Cambridge is seeking an experienced Machine Learning Engineer to develop privacy-respecting AI algorithms for Photos. You will contribute to enhancing the best photo app experience worldwide as part of a collaborative team. The ideal candidate will have a strong background in machine learning, ...

Senior Design Engineer CAD, FEA & NPD Lead

A recruitment agency is looking for a Senior Design Engineer to work in Bedford, UK. The ideal candidate will have over 5 years of mechanical design experience in a 3D CAD environment and familiarity with ISO 9001 standards. Responsibilities include project management, producing 3D models and technical documenta ...

Senior Mechanical Engineer | BIM & Building Services Lead

A leading engineering consultancy in Manchester is seeking a Principal Mechanical Engineer to join their MEP team. This role involves leading mechanical design projects and managing engineers, ensuring compliance with both client requirements and industry standards. Candidates should have significant experience ...

Senior Design Engineer – Foundations for Major Infra (FTC)

Bouygues Construction is looking for a Senior Design Engineer to deliver foundation design solutions for temporary and permanent works across major projects in Ipswich, UK. This role emphasizes technical excellence and accountability, making use of specialist software to produce safe and efficient designs. </ ...

Senior OHL Design Engineer Lead PLS CADD/PLS TOWER Expert

Omexom UK is looking for a Senior Design Engineer to provide technical leadership in Overhead Transmission Line projects. This role necessitates in-depth engineering expertise combined with strategic oversight to ensure timely and budget-compliant project delivery. The ideal candidate will have over 5 ...

🚀 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

    Buffering Video...

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