1,940,901+ Full Stack Software Engineer Javascript React Elixir Jobs in UK — Top Companies Hiring June 2026

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Senior Compiler Engineer, Real Time Performance Systems

We’re working with a well‑funded technology company developing a new software stack for large‑scale, fault‑tolerant computing systems. The team is tackling complex, real‑time challenges at the intersection of compilers, runtimes, and specialised hardware. What you’ll work on: Design and build compil ...

Systems Developer: Build Secure, Scalable Apps (Azure/Python)

Antares in Greater London is looking for a developer to enhance Claritas, their bordereaux management system. This role involves development across the Claritas stack, collaborating with stakeholders to deliver scalable solutions. The ideal candidate should have strong hands-on experience in Python, Dj ...

Senior Developer (Freelance Onsite London Contract)

Senior Developer (Freelance Onsite London Contract) Location: 1 day remote + 1 day on-site in London Contract: Freelance, approx. 3-month rolling project Rate: £250 - £350 per day Start: ASAP < ...

Student Systems (SITS) Analyst Developer

Salary £37,897 - £45,580, 36 days annual leave plus bank holidays, flexible hybrid working policy, generous employer pension contribution and other generous benefits The Role:Hays Technology is recruiting on behalf of a well-established UK-based higher education organisation for a Student Systems (SITS ...

Senior Software Engineer, C++ and Python, 9 Month FTC, Manchester, COR7567

Senior Software Engineer, C++ and Python, 9 Month FTC, Manchester, COR7567 Are you a Senior Software Engineer with strong C++ and Python experience looking to work on cutting-edge AI and machine learning technology? The Role As a Senior Software Engine ...

Junior Front End Web Developer (Website Development)

Description As a Junior Front‑End Web Developer, you will support the ongoing development, optimisation, and performance of moneycorp.com, delivering high‑quality, responsive, and user‑focused web experiences. You will work closely with Design, Marketing, and RevOps teams to deliver high‑quality, ...

Automation Specialist

Job Description About us From supporting start-ups to empowering stakeholders at Google and freeing up the time of a leading Travel Tech C‑suite, SmartPA has built a model where technology enhances human capability rather than replaces it. We help people focus on what matters most ...

AWS Cloud Engineer London

Join Deswik! A global technology leader that delivers integrated software solutions for the mining industry. Department | Software Join us on our journey to a SaaS‑first future Blend technical investigation with automation Contemporary office - West Works building ...

Principal Design Engineer: AI Driven UX Leader

AlphaSense is seeking a Principal Design Engineer to shape the future of our product experience in the United Kingdom. This role demands 12+ years of experience in product design, understanding of modern front-end technologies like HTML/CSS and React, and expertise in leveraging AI in design. You will lead desig ...

Lead Frontend Design Systems Engineer

Seeq is seeking an exceptional Frontend Engineer in the UK focused on evolving its design system and creating reusable application patterns. The role offers a chance to enhance component quality and usability while collaborating with UX and engineering teams. Candidates must have at least 10 years of experience, ...

Senior QA Engineer 12 month maternity contract

Senior QA Engineer - 12 month maternity contract Senior QA Engineer - 12 month maternity contract 1 week ago Be among the first 25 applicants Skimlinks , a Taboola company, is looking for a Senior QA Engineer to take a leadership role in test ...

Product Security Engineer (Founding team)

Overview Aglide's browser agent platform is trusted by household-name fintechs and global enterprises to automate and secure the applications their employees depend on most. We've raised over $3.5M to go after this problem, and every day our platform is running thousands of mission-critical work ...

Senior Networking Solution Test Engineer – AI Cluster Debugging

Job Requisition ID: JR Job Category: IT - Information Technology Time Type: Full time We are looking for a Senior Networking Test Engineer with strong system‑level debugging skills to join our End‑to‑End Verification team! You will work on pioneering NVLink, Ethernet and InfiniBand ...

Tech Lead – Departure & Compliance

The Role Overview In this role, you will lead the evolution of the software and data platforms that underpin our Departure & Compliance product area. You will ensure that departure‑critical data—including passenger, flight, and regulatory information is perfectly integrated and highly resilient a ...

Senior Backend Engineer in London Enfuce

Senior Backend Engineer Location: London, United Kingdom Posted 11 months ago In this role you are going to be developing APIs that provide essential functionality that helps our customers grow their business. This will be the cornerstone of the Enfuce service offerings fo ...

Cisco Engineer in Belfast Hayward Hawk

Cisco Engineer Belfast, UnitedKingdom Posted 9 months ago Tech Stack Cloud Amazon AWS Ansible Python DevOps Security Azure Overview We have some exciting projects on the horizon and are eager t ...

GenAI & AI Engineer — Cloud, MLOps & Multi Agent Systems

AXA UK is seeking a passionate AI Engineer to join their innovative team in Bristol. You will leverage your expertise in AI and machine learning to develop advanced AI and GenAI applications that enhance their insurance products and services. The role involves collaboration across teams, integrating groundbre ...

Controls Engineer / Smart Factory Technician in Darlaston ZF Friedrichshafen

Controls Engineer / Smart Factory Technician Darlaston, UnitedKingdom Posted 11 months ago Tech Stack Python PHP web Qualifications and Experience Experienced PLC programmer proficient in Siemens S5/S7/Tia Portal/Win CC. Sk ...

Backend Engineer, Growth in London Ffern

Backend Engineer, Growth London, United Kingdom Posted 10 months ago Tech stack TypeScript Backend Databases SOLID build systems Features for User Growth and Conversion Utilize your strong proficiency in a program ...

Senior Backend Engineer — APIs for Customer Growth

Senior Backend Engineer Location: London, United Kingdom Posted 11 months ago In this role you are going to be developing APIs that provide essential functionality that helps our customers grow their business. This will be the cornerstone of the Enfuce service offerings fo ...

Senior Lead eSoftware Engineer Equities Algo Trading Java VP in London JPMorgan Chase & Co.

Senior Lead eSoftware Engineer – Equities Algo Trading – Java – VP Location: London, United Kingdom Posted: about 1 year ago Tech Stack Java Low latency messaging Trading systems Qualifications Proficient advanced ...

Senior QA Automation Engineer – Web & Mobile (Hybrid)

SR2 is looking for an experienced QA Test Automation Engineer to join their team in Gloucester. This role focuses on building and driving automation for both web and native mobile applications, utilizing a robust tech stack including Playwright, Appium, and others. You will take full ownership of QA st ...

Senior Backend & AI Engineer — Cloud Native & APIs

慨正橡扯 is seeking a Senior Full‑Stack/AI Engineer with a strong backend focus to join our innovative team in Greater London. The ideal candidate will have extensive hands-on experience in backend engineering and a solid understanding of AI integration into backend systems. You will work collaboratively w ...

AI Engineer in Newark Future Prospects Group

AI Engineer Newark, UnitedKingdom Posted 9 months ago Tech stack Artificial Intelligence Skills Required Familiarity with data preprocessing, feature engineering, and model evaluation techniques. Familiarity with AI, machine ...

Climate Tech Python Engineer Hybrid, Impact

Propel is looking for a Mid Level Python Engineer in Greater London to join a growing startup focused on climate technology. As part of a small, collaborative team, you'll work on developing their core product while contributing to meaningful projects. The ideal candidate will have strong Full Stack ex ...

Software Developer Finance Technology

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 and depth of coverage across four c ...

SDET Event Stream Processing (Hybrid, Glasgow)

Software Development Engineer in Test - ESP - Hybrid, Glasgow, UK We’re a leader in data and AI. Through our software and services, we inspire customers around the world to transform data into intelligence - and questions into answers. If you're looking for a dynamic, fulf ...

SDET, Decisioning: Automate Quality at Scale (Hybrid UK)

Job Description Software Development Engineer in Test - Decisioning - Hybrid, Glasgow, UK We’re a leader in data and AI. Through our software and services, we inspire customers around the world to transform data into intelligence - and questions into answers. I ...

SRE | Permanent | London, Hybrid, AWS

About the job Role: Site Reliability Engineer Type: Full‑time permanent role Location: Hybrid, London City - 3 days per week on‑site Salary: £90,000 per annum Industry: Technology – Gaming Platforms Our Client is a premier provider of high‑volume software solutions for the global iGaming and predict ...

DevOps Lead / DevOps Manager

Location: Reading (Hybrid) Permanent DevOps Lead - AI-Enabled Software Engineering We are seeking an experienced and hands‑on DevOps Lead to join a leading digital infrastructure organisation undergoing significant technology transformation. This is a unique opportunity to lead a ...

Senior Systems Architect Scalable, Cross Stack Solutions

CloudDevs is looking for a highly skilled Technical Architect to design scalable architectures tailored to their tech stack. The role requires extensive collaboration with engineers, designers, and stakeholders to create reliable systems. Candidates should have over 5 years of architectural experience and a soli ...

AI Go to Market Engineer (UK)

Flosum is a Salesforce-native DevOps and data protection platform serving enterprise Salesforce teams across the Fortune 5000. We are in wartime. Pipeline generation, retention, and product velocity are our three highest-priority problems, and AI is the lever that accelerates all three. We are hiring our firs ...

EPOS & SCO Platform Engineer

Job Title: EPOS & SCO Platform Engineer Contract Length: 6 Months Hybrid: 2 Days On Site in Bracknell IR35: Outside IR35 Project Support, maintain, and enhance EPOS and self-checkout platforms across a large retail estate. The role focuse ...

AI Solution Architect

Location: Glasgow Head OfficeFull time, permanent role (37.5 hours per week)JOB PURPOSE:This role will be responsible for driving the design, architecture and delivery of AI-powered solutions across the group. It will be critical in implementing production-grade systems that leverage LLMs ...

Experienced/Senior Online Developer Tech Team

We want you to #JOINTHEREBELLION! For 30 years we’ve been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and throug ...

Experienced/Senior Online Developer Tech Team

We want you to #JOINTHEREBELLION! For 30 years we’ve been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and throug ...

Experienced/Senior Online Developer Tech Team

We want you to#JOINTHEREBELLION! For 30 years we’ve been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and through ...

Experienced/Senior Online Developer Tech Team

We want you to #JOINTHEREBELLION! For 30 years we’ve been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and t ...

Senior Frontend Engineer: Growth Experiments

A health-focused technology company in the UK seeks a Senior Frontend Engineer to lead growth experimentation efforts. You will own the frontend platform, engaging in design and testing of features that enhance patient interactions. The ideal candidate possesses strong skills in React and TypeScript, with experi ...

Senior Scala Engineer Hybrid Backend (London)

A technology consulting firm is looking for a Senior Scala Engineer to build and maintain backend services while integrating data. The ideal candidate will have strong Scala skills, exposure to Docker, Kubernetes, and CI/CD processes, alongside a solid understanding of AI and modern front-end technologies like R ...

Solutions Engineer

Join to apply for the Solutions Engineer role at Cala Group Limited 1 day ago Be among the first 25 applicants Join to apply for the Solutions Engineer role at Cala Group Limited As a member of our small team of Solut ...

Salesforce Technical Lead

6 days ago Be among the first 25 applicants Get AI-powered advice on this job and more exclusive features. This range is provided by TekSelect. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the ...

Backend Engineer in Birmingham Substrakt

Backend Engineer Birmingham, United Kingdom Backend Engineer at Substrakt. Tech Stack Heroku PHP Amazon AWS SQL S3 MySQL Python WordPress Backend Job Responsibilities < ...

QA Engineer (Associate) in London Calastone

QA Engineer (Associate) London, United Kingdom Posted 9 months ago This is a job posted by our partner Jooble Tech stack API SQL UI Databases Java C REST QA Engineer Tools and Technique ...

Engineering Product Manager

Join to apply for the Engineering Product Manager role at The Audio Programmer . Remote position. Working from anywhere. Job Description We are looking for two highly experienced Product Managers with strong software engineering backgrounds to join a successful audio A ...

Control Systems Engineers

Controls Systems Engineer – Sheffield / South Yorkshire – PLC Software / SCADA / Process Automation – £50-65kSamuel Frank is recruiting for an experienced Control Systems Engineer to join a growing South Yorkshire based system integrator. This Control Systems Engineer role will suit someone who enjoys wr ...

Backend Engineer

TL;DR : We're looking for exceptional builders who help us design and ship the foundational infrastructure that lets Conduct scale to the world's largest enterprises, while accelerating the product teams building on top of it. Why Conduct The world's largest companies are s ...

Founding AI Engineer

About Fleetcraft Aerospace represents the best of human engineering. Yet the systems that build and maintain aircraft are slow, manual, and barely changed in decades - and with a mounting shortage of personnel and parts capacity, the industry has to change to grow. We're reshaping how air ...

Java Developers (all levels)

Position Description Overview At CGI, we’re shaping the future of digital UK Government solutions, building secure, high-impact platforms that improve services for millions across the UK. As a Java Engineer, you’ll play a pivotal role in designing and developing scalable, resilient back-e ...

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