126 to 150 of 162 Permanent Jest Jobs

data visualization Working in a culture where engineering excellence and code quality are non-negotiable 🛠️ Tech Stack: Languages: TypeScript, JavaScript (ES6+) Frameworks: React, Redux (or similar) Tooling: Webpack, Babel, Jest, ESLint, Git Bonus: Experience with WebSockets, performance profiling, or custom charting libraries (e.g., D3.js, Highcharts) ✅ What They’re Looking For: Strong experience with React and modern JavaScript/TypeScript Deep More ❯

APIs, GraphQL, and modern front-end build tools (Webpack, Babel, etc.) Experience with responsive design and cross-browser compatibility Understanding of version control systems (Git) Knowledge of testing frameworks (Jest, Enzyme, or similar) is a plus Experience 2+ years of professional experience in front-end development using React.js Proven track record of delivering high-quality web applications in a collaborative More ❯

with React and related app development libraries, such as Redux Toolkit and Material UI Experience with front-end testing methodologies and tools, such as React Testing Library, Cypress, and Jest Experience using RESTful APIs and addressing common challenges, such as state management and concurrency Currently possesses and is able to maintain an active U.S. Secret security clearance, at a minimum. More ❯

and React . Experience with Node.js, Webpack , and modern development workflows. Strong understanding of client-side performance, cross-browser compatibility, and RESTful APIs . Experience with testing frameworks (e.g., Jest, Enzyme ) and UI tools (e.g., Figma ). A passion for building maintainable, scalable, and high-quality software. Strong communication skills and a collaborative mindset. Bonus skills: Data visualisation (e.g., D3.js More ❯

.Net core experience Understanding of Responsive Design Use of REST APIs (JSON/XML) Modern Web Technologies (Angular, TypeScript, JavaScript, CSS3, HTML5) Unit and End-to-End Testing frameworks (Jest, Cypress) Why work for us Starting at 25 days annual leave + bank holidays 5% Pension Life insurance of x4 base salary Flexible working Ride to Work salary sacrifice External More ❯

and contribute directly to the user experience. Your Day-to-Day Will Include: Designing and implementing scalable front-end solutions using React , TypeScript , and modern tooling (e.g. Redux, Webpack, Jest). Breaking down complex, ambiguous problems into clean, testable components. Performance tuningboost UI responsiveness, decrease load times, and streamline data management. Selecting and integrating third-party tools and libraries wisely More ❯

inclusive design principles. Abillity to lead cross-functional teams and mentor developers Experience translating design language into reusable code components. Experience with CI/CD pipelines, testing frameworks (e.g., Jest, Playwright), and performance monitoring Additional Information Benefits package includes: Hybrid working Great compensation package and discretionary bonus Core benefits include pension, bupa healthcare, sharesave scheme and more 25 days annual More ❯

with React and related app development libraries, such as Redux Toolkit and Material UI Experience with front-end testing methodologies and tools, such as React Testing Library, Cypress, and Jest Experience using RESTful APIs and addressing common challenges, such as state management and concurrency Preferred Full stack and back-end server code implemented in C, C++, Rust languages Experience with More ❯

Step Functions, Apigee) Proficiency in Java (Springboot), AngularJS, Jenkins, Node 10, Groovy, Bash, Typescript. Tooling: Gitlab, Jenkins, CloudFormation, Maven, Docker, Fortify on Demand, SonarQube Knowledge of Karate, Gherkin, Cypress, Jest Understanding of DevOps practices. Ability to design and implement secure systems. Experience with automation and integration tools. Knowledge of service support and fault resolution More ❯

Step Functions, Apigee) Proficiency in Java (Springboot), AngularJS, Jenkins, Node 10, Groovy, Bash, Typescript. Tooling: Gitlab, Jenkins, CloudFormation, Maven, Docker, Fortify on Demand, SonarQube Knowledge of Karate, Gherkin, Cypress, Jest Understanding of DevOps practices. Ability to design and implement secure systems. Experience with automation and integration tools. Knowledge of service support and fault resolution More ❯

training and personal development. Technical Skills: HTML CSS TypeScript React JavaScript object model JavaScript preprocessors eg webpack, Rollup, Babel SCSS/LESS Knowledge of performance testing frameworks Mocha and Jest The company offers a competitive salary, exposure to new technology, career progression and a great working environment with a talented team. Interviews are being held within the next couple of More ❯

with React and related app development libraries, such as Redux Toolkit and Material UI Experience with front-end testing methodologies and tools, such as React Testing Library, Cypress, and Jest Experience using RESTful APIs and addressing common challenges, such as state management and concurrency Currently possesses and is able to maintain an active U.S. Secret security clearance, at a minimum. More ❯

experience Preferred: • Development Tools: o Git source version control o Jira project management o Static Application Security Testing (SAST, e.g. SonarQube, Gitlab SAST) o Unit and integration testing (e.g., jest, mocha, chai) • Platforms: o Kubernetes o Gitlab CI/CD (continuous integration/continuous delivery) o Attribute and role-based access control paradigms (ABAC/RBAC) o Linux administration o More ❯

Responsibilities: Expert knowledge of HTML, CSS and JavaScript Experience developing front end applications using modern JavaScript frameworks like; React, Vue, Svelte Familiarity with writing unit tests using frameworks like Jest Experience working with APIs and integrating back end data If you're detail-oriented, passionate about technology and looking for a role where your work truly matters, we would love More ❯

both RESTful API's and GraphQL (Relay or Apollo experience is a bonus, but not required) Experience with recent versions of React, especially React Hooks and Context Experience with Jest and Cypress for unit and end-to-end testing Experience with monorepos, specifically using Lerna and Nx Understands what an ETL pipeline is Understands databases and SQL Job Duties: Responsible More ❯

attention to detail Collaborative approach with cross-functional teams Bonus Skills Familiarity with Python/Django and API integration Experience with HubSpot , Payload CMS , or embedded workflows Testing skills (Jest, RTL) and accessibility best practices Exposure to Figma , CI/CD , or Shopify Perks Based in Leeds LS11 (Full time office based) Competitive salary Work on meaningful, user-facing products More ❯

attention to detail Collaborative approach with cross-functional teams Bonus Skills Familiarity with Python/Django and API integration Experience with HubSpot , Payload CMS , or embedded workflows Testing skills (Jest, RTL) and accessibility best practices Exposure to Figma , CI/CD , or Shopify Perks Based in Leeds LS11 (Full time office based) Competitive salary Work on meaningful, user-facing products More ❯

commercial experience with React and React Native. Experience with Next.js , ShadCN , and design systems. Solid understanding of RESTful APIs and API integration Knowledge of modern testing tools such as Jest , React Testing Library , or Enzyme. Experience collaborating with backend teams, designers, and product stakeholders. Nice to have: Exposure to tools like Cursor and other AI coding assistants Familiarity with mobile More ❯

experience Strong commercial experience with React and TypeScript Familiarity with Vite, Next.js, or other modern build tools Comfortable with component libraries and design systems Proficient in testing frameworks (e.g. Jest, React Testing Library) Good understanding of performance optimisation and accessibility best practices The ideal candidate will be proactive, collaborative, and keen to influence both tech and product direction. If you More ❯

commercial experience with React and React Native. Experience with Next.js , ShadCN , and design systems. Solid understanding of RESTful APIs and API integration Knowledge of modern testing tools such as Jest , React Testing Library , or Enzyme. Experience collaborating with backend teams, designers, and product stakeholders. Nice to have: Exposure to tools like Cursor and other AI coding assistants Familiarity with mobile More ❯

for web automation. Programming Skills: Strong programming or scripting skills in modern languages such as JavaScript/TypeScript or Python. Test Frameworks: Experience with test frameworks like Mocha/Jest or knowledge of others like TestNG, Junit. API Testing Tools: Familiarity with tools such as Postman for API testing. CI/CD Tools: Experience with CI/CD tools like More ❯

standardization practices • Development Tools: o Git source version control o Jira project management o Static Application Security Testing (SAST, e.g. SonarQube, Gitlab SAST) o Unit and integration testing (e.g., jest, mocha, chai) • Database: o Postgres 15 o Liquibase configuration management o Yet Another Markup Language (YAML), JavaScript Object Notation (JSON) o Entity-Attribute-Value (EAV) design • Business Analysis and Project More ❯

and TypeScript Build reusable components and front-end libraries for future use Write clean, maintainable code following best practices and team coding standards Write and maintain unit tests using Jest or Vitest to ensure code quality Collaborate with backend developers and other team members to deliver high-quality features Participate in code reviews and learn from feedback Debug and troubleshoot … TypeScript and its application in React projects Proficiency with React hooks (useState, useEffect, useContext, useReducer, etc.) Understanding of React component rendering lifecycle and performance optimization Experience writing tests using Jest or Vitest (or similar testing frameworks) Knowledge of modern JavaScript (ES6+) features and syntax Familiarity with HTML5 and CSS3, including responsive design principles Understanding of version control with Git Basic More ❯

development using Node.js. Experience working with C# in enterprise environments. Familiarity with cloud computing, infrastructure as code, and CI/CD pipelines. Experience with automated testing tools such as Jest or Vitest Comfortable using Azure DevOPs The Senior Developer will be joining a friendly, agile, and innovative team, based in Birmingham where you will play an integral role in the … development of data-rich, user-friendly applications Keywords: Senior Software Engineer, Fullstack Developer, Node.js, React, TypeScript, C#, REST API, NextJS, Jest, Vitest, CI/CD, Azure DevOPs, Birmingham, West MidlandsErin Associates Ltd is acting as an Employment Agency in relation to this vacancy. More ❯

development using Node.js. Experience working with C# in enterprise environments. Familiarity with cloud computing, infrastructure as code, and CI/CD pipelines. Experience with automated testing tools such as Jest or Vitest Comfortable using Azure DevOPs The Senior Developer will be joining a friendly, agile, and innovative team, based in Birmingham where you will play an integral role in the … development of data-rich, user-friendly applications Keywords: Senior Software Engineer, Fullstack Developer, Node.js, React, TypeScript, C#, REST API, NextJS, Jest, Vitest, CI/CD, Azure DevOPs, Birmingham, West Midlands Erin Associates Ltd is acting as an Employment Agency in relation to this vacancy. More ❯