1 to 25 of 33 Permanent npm Jobs in the UK

implement frontend best practices in areas such as performance optimization, code quality, testing (React Testing Library, Jest, etc.), accessibility, and maintainability. Drive improvements and innovation in ourfrontend architecture, tooling (NPM, Webpack, Vite), and development processes. Technologies We Use Languages & Frameworks: JavaScript (ES6+), TypeScript, React, Next.js, Redux, HTML5, CSS3/SCSS Testing: React Testing Library, Jest, Cypress (or similar) Build & Tooling … NPM, Webpack, Vite (or similar modernbundlers), Babel DevOps & Tools: AWS (S3, CloudFront, etc.), GitlabCI/CD, Git Backend Interaction: RESTful APIs (from Grails/Java services) Qualifications Must haves: 5-7+ years of proven track record in frontend development, with a strongportfolio of building complex, scalable web applications using JavaScript, CSS, and HTML. Expert-level experience with React, Next.js … lead technical design discussions, collaborate effectively with UI/UX, andtranslate complex requirements into technically feasible and elegant designs. Deep experience setting up, configuring, and optimizing modern JavaScript applicationtooling (NPM, Webpack, Babel, linters, etc.). Strong experience and passion for working with ourevolving stack and tools, including modern JavaScript/TypeScript and frontend frameworks. Proven ability to quickly learn and More ❯

feature delivery, preferably with Java/Spring Boot, and microservices development. Familiar with HTML, CSS, PostCSS, CSS Modules, CSS-in-JS, and modern front-end build pipelines (Babel, Webpack, NPM). Knowledgeable in Cloud Environments (AWS) and deploying applications. Capable of translating business requirements into technical ones and adept at problem-solving. Experienced in UI testing and benchmarking (JUnit, jest More ❯

GitHub for version control and collaboration. Testing and Debugging : Ability to write and maintain unit and integration tests. Experience with debugging tools and performance optimisation. Additional Tools : Familiarity with npm for package management and build processes. Understanding of DevTools for cross-browser testing and responsiveness. Soft Skills and Experience Experience : Minimum of 3-5 years in full-stack development, with More ❯

conducting code reviews, and maintaining high technical standards across the team. Collaborating across the business to ensure best practices and cross-functional alignment. Using tools like Webpack, Composer, and NPM to optimise workflows. Contributing to continuous integration and deployment improvements. Supporting the modernisation of our tech stack and development processes. We value a strong, in-person, team-driven culture where … experience leading development projects and mentoring other developers. Strong technical skills in Symfony, Vue.js, HTML, SCSS, JavaScript, and MySQL. Solid understanding of Git, APIs, and package managers (e.g. Composer, NPM). Comfortable working with and improving legacy codebases. A proactive problem-solver who performs well under pressure. Strong communication and collaboration skills. Passion for building scalable, maintainable applications. A commitment More ❯

conducting code reviews, and maintaining high technical standards across the team. Collaborating across the business to ensure best practices and cross-functional alignment. Using tools like Webpack, Composer, and NPM to optimise workflows. Contributing to continuous integration and deployment improvements. Supporting the modernisation of our tech stack and development processes. We value a strong, in-person, team-driven culture where … experience leading development projects and mentoring other developers. Strong technical skills in Symfony, Vue.js, HTML, SCSS, JavaScript, and MySQL. Solid understanding of Git, APIs, and package managers (e.g. Composer, NPM). Comfortable working with and improving legacy codebases. A proactive problem-solver who performs well under pressure. Strong communication and collaboration skills. Passion for building scalable, maintainable applications. A commitment More ❯

conducting code reviews, and maintaining high technical standards across the team. Collaborating across the business to ensure best practices and cross-functional alignment. Using tools like Webpack, Composer, and NPM to optimise workflows. Contributing to continuous integration and deployment improvements. Supporting the modernisation of our tech stack and development processes. We value a strong, in-person, team-driven culture where … experience leading development projects and mentoring other developers. Strong technical skills in Symfony, Vue.js, HTML, SCSS, JavaScript, and MySQL. Solid understanding of Git, APIs, and package managers (e.g. Composer, NPM). Comfortable working with and improving legacy codebases. A proactive problem-solver who performs well under pressure. Strong communication and collaboration skills. Passion for building scalable, maintainable applications. A commitment More ❯

design, including CSS frameworks such as Bootstrap or Tailwind Familiarity with RESTful APIs and integration of third-party services and APIs Proficiency with front-end build tools like Webpack, npm, and Yarn Expertise in version control systems, particularly Git, and collaboration platforms such as GitHub or GitLab Experience with TypeScript and familiarity with ES6+ features Strong understanding of accessibility standards More ❯

external teams. Commercial experience with JavaScript or TypeScript (ideally React). Experience with RESTful APIs. Experience in code management tools as Git and package managers (e.g., pip, poetry, uv, npm, or yarn). Ability to write clean, efficient, and maintainable code, unit tests, and documentation, following best practices and coding standards. Strong problem-solving and analytical skills. You take accountability More ❯

and MySQL for building performant web applications. Proficient with version control systems , especially GIT . Demonstrated experience integrating and working with APIs and package managers such as Composer and NPM . Ability to work with and modernise legacy codebases . Skilled in troubleshooting, debugging, and optimising system performance. Proven leadership and mentoring abilities , particularly in developing junior team members. Excellent … future-proof our technical infrastructure through stack modernisation and process optimisation. Quickly resolve bugs and technical challenges to ensure reliability and system uptime. Utilise tools like Webpack , Composer , and NPM to improve development workflows. Produce and maintain clear technical documentation to support team collaboration and knowledge sharing. General Responsibilities Ensure ongoing compliance with all internal policies and procedures. Contribute actively More ❯

and MySQL for building performant web applications. Proficient with version control systems , especially GIT . Demonstrated experience integrating and working with APIs and package managers such as Composer and NPM . Ability to work with and modernise legacy codebases . Skilled in troubleshooting, debugging, and optimising system performance. Proven leadership and mentoring abilities , particularly in developing junior team members. Excellent … future-proof our technical infrastructure through stack modernisation and process optimisation. Quickly resolve bugs and technical challenges to ensure reliability and system uptime. Utilise tools like Webpack , Composer , and NPM to improve development workflows. Produce and maintain clear technical documentation to support team collaboration and knowledge sharing. General Responsibilities Ensure ongoing compliance with all internal policies and procedures. Contribute actively More ❯

Experience of Microsoft App Centre and of deployment processes to mobile app stores. Strong understanding of mobile performance optimization techniques. Strong DevOps experience using Azure DevOps, Webpack, Babel and npm Agile methods Knowledge of coding standards and source control techniques Strong communication skills Flexible attitude, ability to perform under pressure Ability to work well within a team Excellent Test Script More ❯

but not a requirement for this role the ideal candidate will be willing to learn and adapt as requirements and projects necessitate: Composer Laravel framework Vue.js 3 React Typescript NPM/Yarn Working with REST APIs Linux server knowledge (LAMP/LEMP stack) Working with Figma to implement designs Design skills Benefits Regular bonuses Company Pension Scheme Flexible working hours More ❯

such as JSON Web Token Familiarity with modern front-end build pipelines and tools (Github actions a bonus) Experience with common front-end development tools such as Babel, Webpack, NPM, etc. Ability to understand business requirements and translate them into technical requirements A knack for benchmarking and optimization Familiarity with git Experience with React Native is a bonus THIS ROLE More ❯

such as JSON Web Token Familiarity with modern front-end build pipelines and tools (Github actions a bonus) Experience with common front-end development tools such as Babel, Webpack, NPM, etc. Ability to understand business requirements and translate them into technical requirements A knack for benchmarking and optimization Familiarity with git Experience with React Native is a bonus ****THIS ROLE More ❯

scripts and integration software services. Leading reviews of colleagues' work. JavaScript (ES6, React, Typescript), html5 and CSS (SCSS) plus RESTful APIs, microservices and other modern web technologies. Working with npm packages and Webpack builds. Writing test coverage. Understand end-to-end principles and concepts of DevOps and use tools in assigned work. Identify gaps in the team DevOps pipelines and More ❯

Development skills and experience using MVC and .NET 6 Proficient in C# Familiarity with virtual DOM libraries such as Vue or React Experience with tooling and task runners (webpack, npm, nuget, etc) Data Access Technologies (Entity Framework, Dapper) Proficient in core front-end web technologies (JavaScript, HTML, CSS) Experience of developing server-side components (.NET 6+ preferred) Understanding and use More ❯

future-proof our technical infrastructure through stack modernisation and process optimisation. Quickly resolve bugs and technical challenges to ensure reliability and system uptime. Utilise tools like Webpack, Composer, and NPM to improve development workflows. Produce and maintain clear technical documentation to support team collaboration and knowledge sharing. This is a fantastic opportunity to secure a role with a well respected More ❯

future-proof our technical infrastructure through stack modernisation and process optimisation. Quickly resolve bugs and technical challenges to ensure reliability and system uptime. Utilise tools like Webpack, Composer, and NPM to improve development workflows. Produce and maintain clear technical documentation to support team collaboration and knowledge sharing. This is a fantastic opportunity to secure a role with a well respected More ❯

infrastructure. Good-to-have Skills Knowledge or expertise in FX, Fixed Income, Equity, or Equity Derivatives products. Experience with KDB. Understanding of modern JavaScript build tools such as node, npm, rush, yarn, webpack, babel, or Cyprus. Why this role is important to us Our Global Technology Services (GTS) team is vital to State Street, enabling our business to deliver data More ❯

/chapters. Proficiency in HTML5, CSS3, TypeScript, and React. (experience in NextJS and Apollo GQL beneficial) Extensive knowledge of frontend build tools, package managers, and version control systems (Webpack, NPM/Yarn, Git, etc.). Experience with frontend testing frameworks and methodologies. Excellent problem-solving and analytical skills. Strong communication and management abilities. Experience working in an agile development environment. More ❯

least one UI framework: Bootstrap, Tailwind, Material, etc, Experience of common Frontend styling paradigms: BEM, CSS modules, CSS in JS, etc. Knowledge of general Frontend tooling (particularly Node.js and npm) Knowledge of writing unit tests Knowledge and interest in asynchronous and event-based Frontend tooling: RxJS, Ngrx, Redux, etc. Knowledge and interest in writing end-to-end journey tests using More ❯

ups and UX designs. Ensure a high level of quality through business-driven development and test automation Strong AngularJS skills highly preferred Experience with front-end package management tools (NPM, Bower) and task-runners (Gulp/Grunt) Fluency in common mock-up and wire framing tools (Balsamiq, Gliffy, Omnigraffle) Fundamental application of TDD/BDD approach (Jasmine, Karma) Formal experience More ❯

with hybrid react apps (SSR & client-side rendering). Experience with pre-processor CSS languages (sass/less). Are knowledgeable about modern build and versioning tools, including git, npm/gulp. Able to communicate well and are able to simplify technical concepts to stakeholders. Strong understanding of mobile-first, responsive and adaptive design Ability to understand front-end users More ❯

FX/Fixed Income/Equity/Equity Derivatives products KDB Exposure and understanding in one or more of the modern JavaScript build tool chain using things like node, npm, rush, yarn, webpack, babel, cyprus Why this role is important to us Our technology function, Global Technology Services (GTS), is vital to State Street and is the key enabler for More ❯

Required Skills and Experience 3+ years of professional experience in full-stack software development. Strong proficiency in JavaScript, TypeScript, Node.js, React.js, Yarn, and NPM. Experience in optimizing UI/UX for responsiveness, accessibility, and performance. Position Overview Join our team More ❯