1 to 25 of 169 Permanent Jest Jobs

MongoDB, DynamoDB, Redis); solid SQL skills. Deep understanding of front-end engineering best practices - component libraries/design systems, state-management patterns, unit/integration/e2e testing frameworks (Jest, React Testing Library, Cypress), module bundlers and package management. Security & privacy by design - OAuth 2.0/OIDC, JWT, SSO/cloud IAM, encryption in transit/at rest, and awareness More ❯

and other modern frontend frameworks. DevOps: Familiarity with CI/CD tools (GitHub, Jenkins, Harness), Docker, Kubernetes, and cloud platforms (GCP preferred). Automation: Experience with automated testing frameworks (Jest, Cypress, Pact, etc.). ABOUT WORKING FOR US Our ambition is to be the leading UK business for diversity, equity and inclusion supporting our customers, colleagues and communities and we More ❯

include: Expert-level development with our core stack: React, TypeScript, Next.js Performance optimization and monitoring Integration with our REST API layer and backend services Maintaining our comprehensive test suite (Jest, Testing Library, Cypress) Contributing to our CI/CD pipeline using GitHub Actions Collaborating with our product, design, and backend teams to deliver seamless user experiences Requirements Must-have Qualifications … Strong understanding of HTML5, CSS3, and responsive design principles Experience with version control systems (Git, GitHub) Proven ability to architect and develop advanced frontend features Experience with automated testing (Jest, Testing Library, Cypress) and CI/CD pipelines Primary Responsibilities: Design and implement micro-frontend architectures Build modular, reusable component libraries Optimize applications for performance, accessibility, and scalability Ensure code More ❯

include: Expert-level development with our core stack: React, TypeScript, Next.js Performance optimization and monitoring Integration with our REST API layer and backend services Maintaining our comprehensive test suite (Jest, Testing Library, Cypress) Contributing to our CI/CD pipeline using GitHub Actions Collaborating with our product, design, and backend teams to deliver seamless user experiences Requirements Must-have Qualifications … Strong understanding of HTML5, CSS3, and responsive design principles Experience with version control systems (Git, GitHub) Proven ability to architect and develop advanced frontend features Experience with automated testing (Jest, Testing Library, Cypress) and CI/CD pipelines Primary Responsibilities: Design and implement micro-frontend architectures Build modular, reusable component libraries Optimize applications for performance, accessibility, and scalability Ensure code More ❯

and interfacing with the content/asset delivery APIS. Experience of developing and maintaining infrastructure as code. Experience with unit, integration, and end to end testing tools and practices (Jest, Playwright). Understanding of Microservices & principles of RESTful API development, including structuring, documenting, versioning, testing and stubbing/mocking. Experience performing code reviews and following up with learning opportunities. Experience More ❯

services (AWS, Azure, or GCP) and deploying applications in a containerised environment (Docker/Kubernetes). Good understanding of CI/CD pipelines, Git workflows, and automated testing frameworks (Jest, Cypress, etc). Ability to translate UI/UX designs into high-quality, responsive code. Experience collaborating in an Agile team, participating in code reviews and sprint planning. Excellent communication More ❯

with database management systems e.g., MySQL, PostgreSQL, MS SQL Server MongoDB). Familiarity with Git and branching strategies such as GitOps Solid understanding of testing frameworks and methodologies e.g. Jest, Mocha, Selenium. Ability to write and maintain unit, integration, and end-to-end tests. Ability to write and understand design documentation using C4, sequence diagrams and workflows. Excellent problem-solving More ❯

complex bugs, identifying root causes, andimplementing robust solutions for production issues. Champion and 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, and state management libraries like Redux. Proficient with React Testing Library, Jest, or similarfrontend testing frameworks. Demonstrated ability to 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 More ❯

microservices design patterns. Experience in working with Git operations such as branching and merging. Preferred: Experience in querying using SQL. Experience in developing unit testing using frameworks such as Jest, ng-mocks. Familiarity with backend development Spring Boot restful services and microservice (Spring cloud) Familiar with automation testing tools Cypress, Selenium, JMeter Job Skills: Must have strong HTML5, JSON, CSS More ❯

Use modern testing practices and frameworks integrated with CI/CD pipelines. Strong experience of test first development and unit testing with modern testing frameworks and tools such as Jest, Enzyme, React Testing Library, Pact, Cypress and Playwright. DevOps: Familiarity with CI/CD and build pipelines, using tools such as Github , Harness, Jenkins, Docker, ELK, Grafana and Dynatrace. Take More ❯

. Solid understanding of web technologies (HTML5, CSS3, responsive design principles). Familiarity with modern UI frameworks (Material UI, Tailwind CSS, or similar). Experience with frontend testing frameworks (Jest, React Testing Library, Cypress). Knowledge of AWS cloud services and integration with serverless backend architectures (beneficial). Knowledge of WCAG standards and accessibility best practices. Interest or experience in More ❯

and websockets for real-time LLM responses. Optimize bundle size, lazy-loading, and runtime performance. Set up and enforce unit, integration, and end-to-end (E2E) test suites using Jest, React Testing Library, and Cypress. Define coding standards, linting, and Prettier rules; perform code reviews. Build micro-interactions that capture user ratings, corrections, and free-text feedback. Emit structured telemetry More ❯

delivering frontend features. Quality Assurance: Contribute to ensuring the highest quality in all frontend applications through testing, documentation, and code reviews. Testing: Implement automated testing using tools such as Jest and React Testing Library , and contribute to the development of end-to-end tests using Cypress . Key Skills & Experience Core Frontend Expertise: Demonstratable experience in in JavaScript , Typescript , and … React (including Hooks). Testing Experience: Experience in unit and integration testing with Jest and React Testing Library . Familiarity with end-to-end testing using Playwright , Cypress , or similar frameworks. CI/CD & DevOps: Understanding of CI/CD pipelines and modern DevOps tools. Familiarity with Azure DevOps Pipelines is a plus. UX/UI Understanding: Familiarity with UX More ❯

are a plus: Understanding of Software Engineering Principles: SOLID, design patterns, TDD, BDD, DDD, Enterprise Architecture Frontend technologies: HTML, CSS, JavaScript, Typescript, React Experience with testing frameworks: JUnit, Spock, Jest Integration frameworks such as Apache Camel Other scripting languages Experience with O2C applications and payment gateways Familiarity with product tracking tools like Jira Experience working in Agile environments (SCRUM, Kanban More ❯

Understanding of Software Engineering Principles: SOLID, design patterns, TDD, BDD, DDD, Enterprise Architecture Patterns Frontend Technologies: HTML, CSS, JavaScript, Typescript, React Experience with unit and integration testing: JUnit, Spock, Jest Experience with integration frameworks such as Apache Camel Other languages and scripting: nix scripting Experience with O2C applications and payment gateways Experience with tracking tools like Jira Experience working in More ❯

high-quality solutions. • Understanding of Jira/Agile methodology. • Experience with Data Visualization Tools including Tableau, Power BI, Power Apps, etc. Preferred Qualifications: • Familiarity with QA automation frameworks (e.g., Jest, PyTest, Cypress, Selenium). • Knowledge of containerized development and deployment (e.g., Docker). • Experience with DevOps tools and CI/CD pipelines. • Previous experience working on government contracts or secure More ❯

. 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, puppeteer, playwright) and configuring CI/CD pipelines. Proficient in agile development, demonstrating ownership and a commitment to writing high-quality code. Cultural add is as equally as important to More ❯

Code Quality: Participate in code reviews and contribute to the development of best practices to enhance code quality and maintainability. Implement Testing Strategies: Utilize testing frameworks like Playwright and Jest to ensure the reliability and stability of the codebase through rigorous testing practices. Stay Current with Technologies: Continuously explore and implement cutting-edge technologies, frameworks, and tools to enhance our … create visually appealing interfaces. Developer-Centered Approach: Experience in building UIs for a developer, DevOps or SRE audience. Testing Frameworks: Proficiency in using testing frameworks such as Playwright and Jest to ensure high code quality and user experience. Version Control: Proficient in using Git for version control and collaboration on code repositories. Problem-Solving Skills : Strong analytical and problem-solving More ❯

and API development. Knowledge of CI/CD pipelines and containerization (Docker, Kubernetes). Familiarity with cybersecurity best practices in software development. Strong experience with testing frameworks (JUnit, Selenium, Jest). More ❯

and Web related protocols and technologies such as Tomcat, Nodejs, Web Services, or SSL Demonstrated hands-on experience developing JUnit and Jasmine tests Experience with testing platforms such as Jest or Karma Hands-on experience working with DevOps tools such as Git, Jenkins, or Nexus Strongly Desired Skills Recent experience with the Sponsor's Lean Agile methodology Demonstrated experience using More ❯

e.g., Jira, Confluence and Bitbucket Preferred Experience with ET Core/Visual Studio, Cloud Native Computing Foundation Docker and Kubernetes Cloud services, Amazon Web Services (AWS)/Azure, Keycloal Jest/Cypress Test tools or similar More ❯

Core , and Azure Solid understanding of frontend frameworks (React preferred), state management , and component-based architecture Experience with SQL , Git , Postman , JSON/XML , and automated testing frameworks (e.g., Jest, Vitest) Familiarity with CI/CD tools , source control , and agile development methodologies Bonus: Experience with Umbraco , SharePoint , or AI/ML integration Strong problem-solving skills, attention to detail More ❯

GraphQL . Understanding of event-driven architectures and message queues (e.g., Kafka , RabbitMQ ). Knowledge of performance optimization tools and strategies for backend systems. Familiarity with testing frameworks (e.g., Jest , Cypress , Playwright ) for unit, integration, and end-to-end testing. Familiarity with CI/CD pipelines and DevOps tools (e.g., GitHub Actions , Docker , Kubernetes ). Exposure to cloud platforms such More ❯

ES6+), Node.js, and React, with a solid understanding of their ecosystems. Experience with modern development tools and practices, such as Git, CI/CD pipelines, automated testing frameworks (e.g., Jest, Mocha), and containerisation technologies (e.g., Docker). Knowledge of RESTful API design and development, and familiarity with web services architecture. Ability to write efficient, secure, well-documented, and clean JavaScript More ❯

and Node, Java, and with the use of IaC tools such as Terraform and AWS CloudFormation. Experience with unit, integration, and end-to-end testing tools and practices (e.g. Jest, Cypress, Backstop, Playwright). Experience with CI/CD and Trunk Based Development. Experience with observability tools and practices, including monitoring, logging, and tracing to ensure system reliability and performance. More ❯