2,024,900+ Full Stack Software Engineer Javascript React Elixir Jobs in UK — Top Companies Hiring June 2026

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RTGS Core Senior Developer & Support Engineer

RTGS Core Senior Developer & Support Engineer Join to apply for the RTGS Core Senior Developer & Support Engineer role at Bank of England RTGS Core Senior Developer & Support Engineer 1 day ago Be among the first 25 applicants Join to apply f ...

Front End Engineer: Build fast, scalable UI at a growing startup

ivee is a fast-growing scale-up based in Greater London, seeking a Front-end Engineer to develop new user-facing features using React, Vue, or Angular. You will build reusable code and libraries, ensure UI/UX design feasibility, and collaborate with back-end developers. The ideal candidate has 3+ years ...

Maintenance Engineer

Multi-Skilled Maintenance Engineer Wellingborough Minimum 6-Week Contract Day Shift Umbrella or PAYE Join a leading UK bakery producing iconic bread products enjoyed by families across the nation! We're seeking an experienced Multi-Skilled Maintenance Engineer (electrical or mechanical bias) to support our engin ...

Software Engineer (Mid Level) Climate Tech Start Up Python

This is a great chance to join a well funded start up in the climate tech space and make a real impact as they continue to grow. The team are using Python but open to a range of backgrounds - we are looking for strong engineers with a passion for all things climate tech and happy in a start up environment. ...

Ongoing AWS Website Maintenance & Support for a Financial Services Site

Ongoing AWS Website Maintenance & Support for a Financial Services Site Join to apply for the Ongoing AWS Website Maintenance & Support for a Financial Services Site role at Braintrust Ongoing AWS Website Maintenance & Support for a Financial Services Site ...

Backend Engineer (Payments)

Overview Join Proton and build a better internet where privacy is the default At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing f ...

Mobile Fabric Engineer — Building Maintenance & Repairs

Equans UK & Ireland is looking for a Mobile Fabric Engineer in Birmingham. This permanent, full-time role includes planned and reactive fabric maintenance across various building areas. You'll deliver Planned Preventative Maintenance (PPM) and react promptly to urgent tasks. The position offers a salar ...

Product Engineer: Build Scalable Incident AI Platform Remote

A leading AI incident response platform in the UK is seeking a Mid-Senior level engineer to enhance their capabilities. The role involves building production-ready applications in Go, Python, Ruby on Rails, or React, as well as engaging with customers for feedback. Employees are offered market-leading medical in ...

Software Developer AI Trainer

We are looking for a Software Developer to join our team to train AI models. You will measure the progress of these AI chatbots, evaluate their logic, and solve problems to improve the quality of each model. To apply to this role, you will need to be proficient in either Python and/or JavaScript. Yo ...

Senior Network Site Reliability Engineer

Miro is a fast-growing engineering organization building a business-critical collaboration platform used by companies around the world. As our product and infrastructure scale, we are looking for a Senior Network Site Reliability Engineer to help strengthen the reliability, availability, and scalab ...

Senior/Lead Umbraco Developer

We’re helping a Software House in Cardiff to scale up the team with a Senior Software Engineer to lead on Umbraco projects, this is a consultative role and requires regular communication with clients. About the company: They are an award‑winning fast‑growing company with a genuinely ...

Senior Solutions Engineer Auth0, UK&I

Senior Solutions Engineer - Auth0, UK&I The UK&I Solutions Engineering team are involved in all stages of the customer’s development lifecycle and are experienced using presentations, email, phone and social media to connect with customers. We are looking for great teammates who are able to work ...

Senior Data Engineer

This range is provided by Data Idols. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Data Idols Data Science & Engineering Recruitment / Event Organiser at Data Science Festival </h ...

BLAYDON Customer Care Full Time Full Availability

To meet the criteria for this role, you will be required to be available to work within Weekdays and Weekends, working shifts across Early Mornings, Afternoons & Evenings. Please only apply if you are able to meet these requirements. McDonald's are one of the most recognised brands in the world, an ...

Care Professional Full Time and Full Time

Care Professional - Full Time and Full Time Part-time Date Advert Closes: 01 April 2025 Home Instead is the world’s leading provider of non-medical care and companionship services for older people. With minimum visits of one hour, award winning training and an excellent ...

Forward Deployed Engineer

At Optimizely, we're on a mission to help people unlock their digital potential. We do that by reinventing how marketing and product teams work to create and optimize digital experiences across all channels. With Optimizely One, our industry-first operating system for marketers, we offer teams flexibility and ...

Senior Infrastructure Engineer

Base pay range Central London Up to £80k Leading, well-established construction engineering business is seeking a Senior Infrastructure Engineer. You will support and oversee core infrastructure and networking, working closely with managed service providers ...

Product Engineer (Series A)

This is an ambitious AI startup that's building software to help some of the world's most innovative organisations solve complex research and intellectual property challenges. They’ve already raised significant funding, signed major customers, and built a strong team, and are now looking for anothe ...

Senior Frontend Engineer (Typescript)

digiLab is a formative AI company with world‑leading specialists in uncertainty quantification, applied where the stakes are highest and the margin for error is smallest. Our customers are among the largest and most advanced engineering and science‑led organisations in the world, and they are using ...

Staff Engineer (ML Engineer)

About Graphcore At Graphcore, we’re building the future of AI compute. We’re a team of semiconductor, software and AI experts, with deep experience in creating the complete AI compute stack - from silicon and software to infrastructure at datacenter scale. As part of the SoftBank Group, backed by ...

Staff Engineer (ML Engineer)

About Graphcore At Graphcore, we’re building the future of AI compute. We’re a team of semiconductor, software and AI experts, with deep experience in creating the complete AI compute stack - from silicon and software to infrastructure at datacenter scale. As part of the SoftBank ...

Senior Engineer (ML Engineer)

About Graphcore At Graphcore, we’re building the future of AI compute. We’re a team of semiconductor, software and AI experts, with deep experience in creating the complete AI compute stack - from silicon and software to infrastructure at datacenter scale. As part of the SoftBank Group, backed by ...

Senior ML QA Engineer – Benchmarking & Reliability

About Graphcore At Graphcore, we’re building the future of AI compute. We’re a team of semiconductor, software and AI experts, with deep experience in creating the complete AI compute stack - from silicon and software to infrastructure at datacenter scale. As part of the SoftBank ...

UI UX Developer

Responsibilities Maintain a delivery-orientated approach to developing applications and their supporting software and data infrastructure. Manage releases and support existing systems. Working independently and as part of a team to design, develop, test, and implement web-based applications. Buil ...

Senior C# Graphics & 3D CAD Developer (OpenGL/DirectX)

A leading global software house is seeking a Full Stack Developer with a strong background in C# and 3D graphics. You will play a key role in an innovative development team, handling projects from concept to delivery. Ideal candidates will have robust problem-solving skills, particularly in mathematics and geome ...

QA Test Engineer Python Automation

This range is provided by Client Server. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Client Server QA Test Engineer (Python API Automation) Cambridge to £50k <p ...

Senior AI Deployment Architect — Enterprise & Multi Agent

Smartsheet is seeking a skilled individual to lead complex AI deployments and manage customer relationships. The role requires 6–10+ years of experience in software engineering, particularly in deploying AI/ML solutions. Ideal candidates will have strong proficiency in Python, TypeScript, and JavaScript, with th ...

Automation Engineer

4 days ago Be among the first 25 applicants Get AI-powered advice on this job and more exclusive features. Are you ready to make a real impact in a dynamic, high-stakes environment? We're looking for an Automation Engineer to join our team within the Aerospace, Defence, and ...

Staff Product Engineer Python London

Job Description Staff Product Engineer | London Hybrid / Remote | AI x FinTech | Python, AI Workflows, Distributed Systems | £120k–£200k + EquityA VC-backed AI company is rebuilding how accounting work gets done, using agentic workflows and AI automation to eliminate the ...

Technical Lead

Lead the Software Backbone of a Next Generation Robotics Platform Robotics is changing the future of manufacturing and logistics, but many industrial systems remain fragmented, difficult to integrate, and slow to scale. Our client is solving that challenge head on. This UK based robotics ...

Software Developer Prime Services

About Marex Marex Group plc (NASDAQ: MRX) is a diversified global financial services platform providing essential liquidity, market access and infrastructure services to clients across energy, commodities and financial markets. The group provides comprehensive breadth a ...

Software Developer, Cyber Security

Overview S-RM is looking to recruit a skilled Software Developer to contribute to the development and enhancement of platforms and tools that underpin our managed cyber security service delivery. These platforms are central to how we deliver value to our clients, and your role will be crucial in t ...

Research Engineer, Machine Learning (RL Velocity)

About the role The RL Velocity team owns the efficiency and reliability of our RL Science stack - the infrastructure, tooling, and systems that let researchers iterate quickly on training runs. As a Research Engineer on the team, you'll build and improve the core platform that underpins how we do ...

AI Developer Tooling Engineer at Fanvue.com

Job Title: AI Developer Tooling Engineer Company Description: Fanvue.com - Series A AI-powered creator platform with $100M+ ARR Job Description: Join Fanvue to lead the integration of AI across our engineering organization. You will own the AI-assisted development st ...

Research Engineer, Machine Learning (RL Velocity)

About the role The RL Velocity team owns the efficiency and reliability of our RL Science stack - the infrastructure, tooling, and systems that let researchers iterate quickly on training runs. As a Research Engineer on the team, you'll build and improve the core platform that underpins how we do ...

Machine Learning Engineer

Most ML roles optimise models in isolation. This one builds the intelligence layer that determines whether AI-generated software can actually be trusted in production. AI is rewriting how software gets built. But shipping still breaks on testing. Engineering leaders are desperate to release faster w ...

Senior AI Delivery Lead — Regulated Systems (Hybrid)

Oxford Dynamics is seeking a Senior Technical Project Manager to lead the delivery of AI-driven software projects. The role involves managing multiple teams to ensure timely delivery while maintaining quality and compliance in regulated environments. Key responsibilities include leading project roadmaps, produci ...

DevOps Engineers

Platform Support EngineerCentral London (Hybrid – One day in the office every two weeks)£50,000 per annumOur client is looking for a Platform Support Engineer to join their growing technology team. This is an excellent opportunity for someone ...

DevOps Engineers

Platform Support Engineer Central London (Hybrid - One day in the office every two weeks) £50,000 per annum Our client is looking for a Platform Support Engineer to join their growing technology team. This is an excellent opportunity for someone from a Linux Systems Administration ...

Senior Python Developer

Get AI-powered advice on this job and more exclusive features. This range is provided by Tech4. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Tech4 Senior Python Deve ...

Senior Backend Engineer (Java)

This position offers you the opportunity to join a fast-growing technology organization that is redefining productivity paradigms in the software engineering industry. If you are passionate about technology and want to learn about new trends that are shaping human behavior, this opportunity is for you. </p ...

Test Engineer

MCS Group is seeking a Software Test Engineer to join one of their closest clients, a fast-growing Insurtech firm. With huge investment onboard in 2025, this firm's technology function is planning to scale by over 50% in the first half of 2026 and this will include it's quality assurance division scalin ...

Infrastructure Test Automation Engineers

Infrastructure Test Automation Engineer Position Description CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named one of the ‘World’s Best Employers’ by Forbes magazine. We offer a competitive salary, excellent pension, private healthcare, plus a share s ...

Senior Software Engineer: CI/CD & IaC, Security by Design

Randstad Technologies Recruitment is looking for a Software Development Specialist to work in London, Cheltenham, Ipswich, or Manchester. The role involves building and securing technology platforms in a CI/CD environment, ensuring services are secure by design. The ideal candidate will have experience ...

Senior Developer — C#/.NET, Web & Mobile (Hybrid)

System C is seeking a Senior Developer in Belfast to design, develop, and maintain software for the CIS Oncology product suite. The role demands strong professional experience in C# and ASP.NET MVC, alongside expertise with SQL Server and web technologies like JavaScript, HTML, and CSS. You will contri ...

Strategic Product Owner: Lead Vision & Delivery

CodeFirstGirls is seeking a Principal Product Owner in Manchester, UK. In this role, you will lead product innovation and strategy, ensuring alignment with business objectives and collaborating with cross-functional teams. You must have over 1.5 years of experience in software or data engineering, with profic ...

Test Engineer Quality & Security for Critical Systems

A Defence and Cyber Security company in the UK is seeking Test Engineers to ensure the quality and reliability of their software systems. Candidates should have expertise in testing methodologies and tools, such as Java, Python, and Javascript. The role includes designing tests, working closely with engineers, a ...

Software Engineering Lead — Investigations & Crypto (Hybrid)

A leading crypto technology company in Greater London is seeking a Software Engineering Lead to enhance tools for financial crime investigations. You will lead a team dedicated to developing scalable applications and APIs while balancing technical quality with business needs. Ideal candidates have mentoring expe ...

AI Driven Software Engineer for Contact Center (AWS Lex)

A dynamic software company located in the City of London is looking for a skilled developer with expertise in TypeScript and AWS services, particularly in implementing DevOps best practices. The ideal candidate will write efficient code and advocate for automated testing and infrastructure as code. This role req ...

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