1 to 25 of 55 Permanent Jest Jobs in London

such as OAuth 2.0 and JWT Experience using Git, CI/CD tools such as GitHub Actions, and writing unit and integration tests with Jest Familiarity with security principles including IAM, encryption and networking, alongside observability tools such as OpenTelemetry, Honeycomb or Grafana Nice to have: Exposure to identity ...

Grafana). Containerization : Docker and Kubernetes. APIs : REST, GraphQL, OpenAPI. Databases : SQL (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis). Testing : Unit and functional testing (Jest, Cypress, Mocha). Soft Skills Strong communication skills for technical and non-technical stakeholders. Ability to work in fast-paced, complex environments. Proactive problem-solving ...

Helm; support CI/CD pipelines, container registries and environment configuration. Create unit, integration, API and end-to-end tests using tools such as Jest, Playwright and Postman; make testing part of delivery rather than a final step. Use AI-assisted development tools, including the Claude extension, to accelerate development ...

Helm; support CI/CD pipelines, container registries and environment configuration. Create unit, integration, API and end-to-end tests using tools such as Jest, Playwright and Postman; make testing part of delivery rather than a final step. Use AI-assisted development tools, including the Claude extension, to accelerate development ...

Automation : Implementing and maintaining continuous integration/continuous deployment pipelines to accelerate development cycles. Code Quality and Testing : Experience with automated testing frameworks (e.g., Jest, JUnit) and best practices for ensuring code quality. DevOps Practices : Expertise in DevOps, particularly around automating deployment, monitoring, and scaling applications. Communication : Able to confidently ...

Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Relational Databases (e.g. PostgreSQL) Elasticsearch/Opensearch Unit testing and automation Testing frameworks (e.g. Mocha, Jest, Cypress) Experience working in an Agile delivery team Use of code repositories (e.g. GitLab); familiarity with branching strategies, pull requests and merge processes We appreciate ...

based architecture and design systems. Must have experience using continuous delivery toolsets and following Test-Driven Development (TDD) practices with test automation frameworks (e.g., Jest), experience with Git and CI/CD, experience with Mulesoft is essential. Anypoint Studio, Anypoint Exchange, API Manager, Runtime Manager. Experienced in developing integrations using ...

Claude Code (and friends) are daily drivers for rapid prototyping and refactors. React + TypeScript mastery: component design, hooks, performance, testing (Vitest/Jest, Playwright). FastAPI expertise: async patterns, Pydantic schemas, pagination, auth (OAuth2/OIDC), rate‐limits, background jobs. Elasticsearch fluency: mappings/analyzers (ngrams, synonyms), aggregations, filters ...

Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Relational Databases (e.g. PostgreSQL) Elasticsearch/Opensearch Unit testing and automation Testing frameworks (e.g. Mocha, Jest, Cypress) Experience working in an Agile delivery team Use of code repositories (e.g. GitLab); familiarity with branching strategies, pull requests and merge processes Benefits: £: Competitive ...

modern React patterns Commercial experience building and consuming REST APIs Working knowledge of backend technologies (Node.js, Ruby) Solid understanding of frontend testing (Vitest, Jest) Understanding of clean code within both OOP and FP Experience with PostgreSQL and SQL optimization Proficiency with Git and modern CI/CD practices Understanding ...

problem-solving skills. Proactive communicator with owned assignments. Ability to manage time effectively and meet realistic deadlines. Experience with testing frameworks such as Jest or RTL. Understanding of build tools such as Webpack, Vite, Parcel. Understanding of Pre-processors such as SASS, CSS Modules, JS Compilation. Understanding of CI/ ...

environments. Strong Python (3.10+), TypeScript, JavaScript (ES6+), SQL and Bash. Front-end: React.js, Next.js (App Router & Server Components), Tailwind CSS, ShadCN UI, Redux, Zustand, Jest, Cypress plus AI product UX patterns such as streaming, review loops, provenance/citations, long-running tasks and error recovery. Back-end: Django (5.x+ ...

projects demand.Languages & Frameworks: Python (3.10+), TypeScript, JavaScript (ES6+), SQL, Bash · Frontend: React.js, Next.js (App Router & Server Components), Tailwind CSS, ShadCN UI, Redux, Zustand, Jest, Cypress.Build AI product UX patterns (streaming, review loops, provenance/citations, long-running tasks, error-recoveryBackend: Django (5.x+), DRF, FastAPI, Pydantic, Celery, Django Channels, Flask, RESTful ...

JavaScript, TypeScript, Node.JS and related backend technologies, frameworks. Exposure to a variety of JavaScript frameworks and libraries such as Next.JS, React.JS and testing using Jest, Mocha.JS, Cucumber etc. Experience of using Node.js to create high traffic applications using Express.js, Sails, Koa or similar. Knowledge of microservices development and deployment ...

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 ...

design systems (e.g. Storybook) REST and GraphQL API integration Build tooling such as Vite or Webpack Automated testing with tools such as Vitest, Jest, Cypress or Playwright Responsive, accessible UI development (WCAG standards) CSS architecture (e.g. Tailwind, SCSS, CSS Modules) Git and modern software development workflows CI/CD pipelines ...

Cloud/Spring Data JPA/Spring Boot Microservices.* Should have troubleshooting skills using debuggers, logs, etc. Strong understanding of test-driven development using Jest, Cypress, Java script, Junit, Mockito.* Experience with Public clouds like AWS, GCP will be added advantage.* Experience with OpenShift, Docker and Kubernetes.* Understanding of build ...

performance, client-facing web applications. Backend Stack: Proficient with Python, FastAPI, PostgreSQL, Redis, and designing secure REST APIs. Frontend Stack: Proficient with TypeScript, React, Jest, and Storybook. Experience with Micro Frontends (MFEs) is a major plus. DevOps & Cloud: Hands-on experience with Docker, Kubernetes, Terraform, and AWS. Foundations: Strong understanding ...

facing web applications. Backend Expertise: Deep hands-on experience with Python , FastAPI , PostgreSQL , Redis , and secure RESTful APIs. Frontend Proficiency: Mastery of TypeScript , React , Jest , and Storybook . (Experience with Micro-Frontends is a massive bonus). DevOps & Cloud: Comfort with AWS , Docker , Kubernetes , and Terraform for Infrastructure as Code. ...

Services, Azure SQL, Azure DevOps) Experience with Entity Framework Core or backend performance optimization Familiarity with OpenTelemetry, front-end performance monitoring, or testing frameworks (Jest, React Testing Library, Playwright) Prior experience in the EdTech sector 30 days' holiday per year (inclusive of UK bank holidays) 100% remote working #LI-Remote ...

Query, React Context API) and client-side routing. Experience with common frontend tooling, testing, and CI frameworks (e.g., Vite/Webpack, NPM, ESLint, Jest, Playwright). Proven success in building scalable, responsive visual interfaces with strong cross-browser compatibility and user experience design sensibilities. Familiarity with RESTful APIs, modern integration ...

reactive programming paradigms Architecture: Strong understanding of micro-frontends and Single Page Applications (SPA) Testing: Hands-on experience with React Testing Library/Jest for unit and integration testing UI Automation (Good to Have): Exposure to frameworks like Playwright or Cypress Desired Experience Experience working on financial services or trading ...

integration/continuous delivery pipelines, and operational support Strong proficiency in frontend development with React, including state management and testing with frameworks such as Jest or React Testing Library Advanced knowledge of backend development using Node.js and TypeScript to build RESTful APIs, along with strong experience writing and maintaining comprehensive ...

APIs with authentication, role-based access, tenant context and useful client-side error handling. Maintain unit, integration and end-to-end tests with Jest, React Testing Library and Cypress or Playwright. Meet WCAG 2.1 accessibility standards. Profile and optimise code splitting, lazy loading, memorisation and bundles through Jenkins and SonarQube ...

spec-driven planning and automated log analysis to CI/CD validation. Our Stack NodeJS, React, Typescript, Mongo, GitHub, Kubernetes, AWS, Vercel, Circle CI, Jest Interviewing Process We appreciate your time, your interest in the company and dedication during the interviewing process. We'll do our best to move quickly ...