23 of 23 JavaScript Engineer Jobs in the UK

# Senior Software Engineer - Javascript/Vue (UK)Dayshape Software LtdApply on Dayshape Software Ltd's site Check my CV against this jobPosted: TodayContract: permanentListed on: Direct from the employer## Can this job be sponsored Some things to check* The advert does not give a salary. The minimum … your key areas of focus will be enhancing product scalability and usability, helping consistently deliver features that support our customers' success. As a senior engineer, you will work collaboratively with the rest of our cross-functional team to plan and deliver new features and enhancements. You will take ownership ...

# Senior Contract Software Engineer (JavaScript) - FirefoxMozillaSalary not statedContractremote· seniorUKjavascriptListed via Jobicy · posted 28 Oct 2026. The application happens there, not on DevConnect.Apply on Jobicy## DescriptionThe roleYou will help the Firefox DOM Core team improve the health of the Session History area. You will write tests to improve … performance and strategic projects.Required qualifications- Substantial experience in a browser-engine codebase or in automating for a browser-engine, ideally Firefox/Gecko.- Solid Javascript and applying that language skill to write automated tests.- Proficiency in and experience developing software in C++.- Strong debugging skills in a mature larget ...

Software Engineer (PHP & JavaScript) Bristol, hybrid, typically 1 day a week in the office £50,000 to £60,000 + 28 days holiday + bank holidays, PMI, pension, social events If you like the idea of owning proper, business critical software rather than being one tiny … backend, building and evolving the core systems that power operations, reporting, analytics and their B2B customer portal, while also being comfortable in a modern JavaScript front end. You will work closely with the Head of Development on solution design and architectural decisions, and with end users across the business ...

Senior Software Engineer I (Java & JavaScript) Do you enjoy designing and developing scalable, high-performance applications using Java and JavaScript? About the team: You will join the Identity & Access Management team, which owns the authentication and authorisation infrastructure underpinning Elsevier’s global product suite. We build … dimensional data modelling principles Intermediate knowledge of multiple data storage subsystems Confident practitioner in development languages including but not limited to: Java/J2EE, JavaScript, JSP, HTML, Node.js, React, XML, SQL, Windows, Unix. Experience with Keycloak, Auth0, or another identity provider, including realm configuration, authentication flows, and OIDC client ...

Senior Front End D3 Javascript Software Engineer - Holborn Our Client wants to recruit a Senior Front End Software Developer with at least 7 to 10 years expertise of working with D3 React and Javascript. You will be involved with creating sophisticated, robust and easy to use web apps … Redux) Data visualisation experience, including with D3.js Experience with continuous integration, test automation, and monitoring You must have the following skills: Strong proficiency in JavaScript, CSS, HTML including DOM manipulation and the JavaScript object model Familiarity with RESTful APIs Knowledge of modern authorization mechanisms, such as JSON ...

your key areas of focus will be enhancing product scalability and usability, helping consistently deliver features that support our customers' success. As a senior engineer, you will work collaboratively with the rest of our cross-functional team to plan and deliver new features and enhancements. You will take ownership … Support our product and engineering managers in prioritisation, scoping and leading delivery of product features Write complex, performant frontend business logic in JavaScript Write and upgrade UI components using JavaScript and Vue.js Write automated tests to assure quality (unit and end-to-end testing) Support, mentor and coach ...

Dayshape Software Ltd in Edinburgh is seeking a senior JavaScript engineer to strengthen our engineering team. You will work on the frontend stack with vanilla JS and Vue.js in a hybrid, UK-based setup, with a typical 37.5-hour week and flexible hours. Join a fast-growing software ...

This is a hands‐on role for an experienced engineer who enjoys solving complex technical challenges, influencing architecture decisions, and working across both backend and frontend technologies. You'll play a key role in helping modernise existing systems, supporting the migration of legacy applications, and contributing to the development … hybrid working) Free on-site Gym, Cycle to Work Scheme, Regular Social Events The Opportunity We’re searching for a Senior Full Stack Engineer to join a growing internal technology function across a multi-site group. Designing, developing and supporting enterprise applications across backend and frontend technologies. Helping ...

myGwork – the largest global platform for the LGBTQ+ business community. Please do not contact the recruiter directly. Senior Agentic AI Full-Stack Software Engineer (Java & React/JavaScript/Angular/Claude Code/Codex) Would you like to help create products to support the sharing of scientific … complex technical problems? About the team: Our dynamic Agile Teams deliver the technology that facilitates researchers to publish quality scientific research. As a Software Engineer, you will build capabilities to improve the quality of scientific research. About the role: As a Senior II Software Engineer, you will build ...

hard technical problems where poor performance or unreliable code shows. What you'll build You'll design and develop scalable applications and APIs in JavaScript, TypeScript and React, and integrate them with the Python APIs behind the platform. Your work will include: Building responsive, data-intensive web and desktop … reviews, CI/CD improvements and decisions on new tools and architecture What you'll need You don't need to be a Python engineer, but you'll work closely with Python APIs, so some familiarity helps. You should be comfortable with HTML5, CSS3, responsive design, browser compatibility ...

Senior Full-Stack Software Engineer (Java & React/Javascript/Angular)****Would you like to help create products to support the sharing of scientific knowledge?****Do you enjoy collaborating to solve complex technical problems?****About the team:**Our dynamic Agile Teams deliver the technology which facilitates researchers … publish quality scientific research. As a Software Engineer, you will build capabilities to improve the quality of scientific research.**About the role:**As a Senior II Software Engineer, you will build capabilities to support scientific researchers through the process of submitting the research for publication. We are continually ...

Senior Agentic AI Full-Stack Software Engineer (Java & React/JavaScript/Angular/Claude Code/Codex) Would you like to help create products to support the sharing of scientific knowledge? Do you enjoy collaborating to solve complex technical problems? About the team Our dynamic Agile Teams … deliver the technology that facilitates researchers to publish quality scientific research. As a Software Engineer, you will build capabilities to improve the quality of scientific research. About the role As a Senior II Software Engineer, you will build capabilities to support scientific researchers through the process of submitting ...

Odro Ltd. is seeking a Senior Javascript Developer in the Glasgow area. The role spans the full stack, from greenfield product work to maintaining legacy Node.js applications, using NestJS, TypeScript, GraphQL via Hasura, PostgreSQL and Vue.js. This is a hybrid role with two days per week in our Glasgow ...

developer to join our team in London. You will enhance our in-house frameworks and core applications, tackling new features and bug fixes with JavaScript, Node.js, and React. Collaborate with project managers, designers and engineers to tailor solutions that meet business needs, uphold quality, and embrace DevOps practices including ...

Primo Interactive Limited is seeking a seasoned frontend/backend developer to build interactive interfaces in React, Vue or Angular from Figma to production. You will also write Node.js APIs and services, ensuring smooth integrations ...

Primo Interactive Limited is seeking a seasoned frontend/backend developer to build interactive interfaces in React, Vue or Angular from Figma to production. You will also write Node.js APIs and services, ensuring smooth integrations ...

Primo Interactive Limited is seeking a seasoned frontend/backend developer to build interactive interfaces in React, Vue or Angular from Figma to production. You will also write Node.js APIs and services, ensuring smooth integrations ...

Elsevier Limited Company is seeking a Senior Software Engineer I (Java & JavaScript) to design and develop scalable, high-performance applications within the Identity & Access Management team. You will contribute to authentication and authorization infrastructure that powers our global product suite, operating on AWS ECS and EKS. The role ...

exposure to cloud infrastructure, APIs, integrations and modern development practices. Strong PHP development experience using Symfony, Laravel or a comparable modern framework. Solid JavaScript development skills. Experience designing and working with relational databases and SQL. Proven ability to turn business requirements into structured technical solutions. Experience using AI-assisted ...

Mozilla is seeking a Senior Contract Software Engineer to join the Firefox DOM Core team. You will design and run automated tests in JavaScript, contribute to Web Platform Tests, and help improve the health of the Session History area in Gecko. You will fix failing tests, review code ...

Elsevier is seeking a Senior Software Engineer I to design and implement scalable Java and JavaScript applications. You will join the Identity & Access Management team, contributing to authentication and authorisation infrastructure on AWS ECS and EKS. Expect challenging research, design, mentoring, and collaboration with product and customers ...

want engineers who ask great questions, learn from their teammates, and know how to get what they need to do their best work.The Cloud Engineer’s mission will join be building with Serverless on AWS . This will be a client facing role and you will be involved ...

Dayshape Software Ltd is seeking a senior JavaScript developer to join our engineering team in the UK. You will write complex frontend logic in JavaScript and build UI components with Vue.js, ensuring high performance and usability. You will also create automated tests and mentor teammates, contributing to scalable ...