10 of 10 Permanent Jest Jobs in Central London

Toolkit Frontend HTML5, CSS3, JavaScript (ES6+), TypeScript React.js (preferred), Angular, or Vue.js Responsive design (Bootstrap, Tailwind), state management (Redux, Context API) Front-end testing (Jest, React Testing Library, Cypress) Backend C#, ASP.NET Core/.NET 6+ RESTful and GraphQL APIs Entity Framework Core, LINQ Authentication & authorisation (OAuth2, JWT, Azure ...

usability, personalization, or automation. Deep understanding of JavaScript (ES6+) , React Hooks, and state management patterns (Redux, Zustand, or Recoil). Proficiency with testing frameworks (Jest, React Testing Library, Cypress) and performance profiling tools. Experience integrating RESTful and GraphQL APIs . Bachelor’s degree in Computer Science, Software Engineering, or related ...

GraphQL APIs (Apollo) . ● Implement WebSockets for real-time communication. ● Ensure API security using JWT, OAuth , and other authentication mechanisms. ● Perform unit testing with Jest or Mocha and API testing with Postman . ● Implement caching and messaging solutions with Redis (Pub/Sub) . ● Work with Docker & Kubernetes (K8s/ ...

translate business requirements into technical solutions Nice to Have Experience with TypeScript Familiarity with server-side rendering Knowledge of testing frameworks such as Jest or Mocha Experience with CI/CD pipelines What’s on Offer High level of autonomy with trust-based engineering culture Supportive leadership with a focus ...

explain technical concepts to non-technical audiences. Useful Experience NextJS/Vercel (app router, caching, speed-insights, static rendering, turbo, mono-repo) Typescript Jest Storybook (and Storybook testing) Playwright Contentful (or similar headless CMSs) Algolia Datadog (or similar monitoring tools, structuring logs, setting up monitors) GitHub actions HTTP (headers, status ...

code quality are taken seriously — every single day Tech Stack Languages: TypeScript, JavaScript (ES6+) Frameworks: React, Redux (or similar state management) Tooling: Webpack, Babel, Jest, ESLint, Git Bonus: WebSockets, performance profiling, custom charting (D3.js, Highcharts) What They’re Looking For Deep expertise with React and modern TypeScript/JavaScript Strong ...

stack TypeScript, React, Next.js and Node.js Strong expertise in designing and maintaining scalable, high-performance web applications A good understanding of databases Experience using Jest and Cypress If you’re a Senior Software Engineer (React/Node) looking to work in a tech for good organisation, please apply. ...

translate complex, ambiguous problems into elegant, scalable solutions. Tech Ecosystem React · TypeScript · Vite · Next.js · WebAssembly (DuckDB, WebGPU) · D3/visx · Storybook · Tailwind CSS · Jest · Cypress · Playwright What You Bring 8+ years building and evolving large-scale web applications. Proven track record in front-end architecture (modular codebases, micro-frontends, design ...

work collaboratively. Desirable: Experience with BDD/TDD methodologies. Familiarity with API testing and tools such as Postman. GraphQL Knowledge of testing frameworks like Jest or Mocha. What We Offer: A collaborative and supportive work environment. Flexible working arrangements (remote or hybrid). Career development opportunities and training support. ...

Contribute to the overall architecture and design of the technology created/maintained by the delivery team. Develop Web Trading Applications using ReactJS, Cypress, Jest, React Testing Library, Jenkins, React Hooks Develop solutions to a high standard that is maintainable, testable and meets the requirement’s acceptance criteria. Adhere ...