1 to 25 of 45 Jest Jobs

strategies and database tuning, reducing API response times by over 30% . Developed automated unit, integration and end-to-end tests using JUnit, Mockito, Jest, Cypress and Playwright, increasing deployment confidence and reducing production defects. Worked with PostgreSQL and MongoDB, designing efficient data models and optimising complex queries. Applied secure ...

Modern JavaScript (ES6+), HTML5 and CSS3. State management libraries such as Redux or Context API. REST APIs and asynchronous programming. Testing frameworks such as Jest and React Testing Library. Git and collaborative development workflows. Agile/Scrum delivery environments. CI/CD pipelines and modern software engineering practices. Desirable experience ...

Nice to Have Event-driven architecture experience (Kafka, async patterns) Observability tools (Prometheus, Grafana, ELK) Frontend security (OAuth2, JWT) Automated testing frameworks (Cypress, Playwright, Jest) Design systems and tooling (Storybook, Figma) Experience in financial services, fintech, or payments environments Reasonable Adjustments: Respect and equality are core values to us. ...

frameworks such as Express). Package Management: Proficiency with NPM . Testing: Strong commitment to Test Driven Development (TDD) and common test frameworks (e.g., Jest, Mocha, Chai). Databases: Experience with both Relational and NoSQL data stores (e.g., PostgreSQL, MySQL, MongoDB, DynamoDB). CI/CD & DevOps: Hands-on experience ...

e.g. TeamCity) Strong experience using Git for version control Experience working with RESTful APIs (design and integration) Familiarity with testing frameworks (e.g. xUnit, NUnit, Jest, Jasmine) Experience with logging and monitoring tools (e.g. Elasticsearch, Sentry, Rollbar) Awareness of cloud technologies (AWS, Terraform, Cloudflare – desirable) About You Passionate about technology ...

NoSQL (eg. Redis). Knowledge of authentication and authorisation (JWT, OAuth). Experience with unit testing, integration testing and end-to-end testing (Jest, Mocha, Chai, Cypress). Proficiency in using package managers like npm or Yarn. Understanding of containerisation (Docker) and working with CI/CD pipelines (Jenkins, Azure ...

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 ...

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 ...

work with a variety of technologies. You'll ideally have experience with some of the following, or be open to learning: JavaScript: React, Node.js, Jest, Cypress Ruby (non-Rails environment) - nice to have AWS: EC2, ECS, Lambda, S3, SQS Databases: MongoDB & PostgreSQL They are looking for someone who is: Proactive ...

work with a variety of technologies. You’ll ideally have experience with some of the following, or be open to learning: JavaScript: React, Node, Jest, Cypress Ruby (non-Rails environment) – nice to have AWS: EC2, ECS, Lambda, S3, SQS Databases: MongoDB & PostgreSQL They are looking for someone who is: Proactive ...

APIs and mobile libraries for networking. Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model. Experience with automated testing suites, like Jest or Mocha. Excellent problem-solving skills and the ability to think algorithmically. Experience with cloud message APIs and usage of push notifications. Knowledge ...

HTML5, CSS3 and SCSS Responsive and mobile-first development experience REST API and/or GraphQL integration experience Testing experience using tools such as Jest, React Testing Library, Cypress or Playwright Experience working with Git-based version control and CI/CD pipelines Strong knowledge of frontend performance optimisation ...

similar server-side JavaScript/TypeScript environments REST APIs, ideally with Express, Nest.js or similar MongoDB and/or relational databases Unit testing with Jest or similar Working in a CI environment Clear communication and the ability to work well in a collaborative development team Useful experience AI-assisted development ...

working with CI/CD pipelines using tools like GitHub Actions, CircleCI, or AWS CodePipeline. Familiarity with modern testing practices and tools (e.g., Jest, Vitest), including writing unit and integration tests. Basic understanding of secure development practices and familiarity with threat modelling and risk assessment techniques. Good time management ...

WCAG 2.1/2.2 AA standards. Experience developing forms-heavy applications, including validation, file handling, and error management. Testing experience with frameworks such as Jest, React Testing Library, or Playwright. Strong understanding of Git workflows and CI/CD practices. Desirable Experience working within UK public sector or central government ...

APIs and mobile libraries for networking. Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model. Experience with automated testing suites, like Jest or Mocha. Excellent problem-solving skills and the ability to think algorithmically. Experience with cloud message APIs and usage of push notifications. Knowledge ...

TypeScript (Node.js, React), MongoDB & Postgres. We use AWS for our cloud services and our infrastructure is managed with Kubernetes and Terraform. We test with Jest and Cypress, and monitor our systems with Prometheus, Grafana and Sentry. We embrace building with AI to help us deliver faster and better ...

team. This is non‐negotiable. Rigorous engineering standards – fluency with Git-based workflows, trunk-based development, CI/CD (ideally GitHub Actions), comprehensive testing (Jest, React Testing Library, Playwright), and a genuine commitment to accessibility, performance and secure-by-default coding. Technical leadership without the title – a track record ...

Experience in building accessible compliant user interfaces (WCAG). Proven ability in delivering thorough unit level test coverage using common testing frameworks such as Jest or Mocha. Experience integrating with a wide range of technical systems including database technologies (SQL or NoSQL), caching tools such as Redis and API Microservices ...

YAML, Terraform, CloudFormation, Bash/Zsh, and modern tooling (VSCode, GitHub, Vite, Rollup, tsx, npm). Proficiency with unit, integration, and E2E testing (Vitest, Jest, Cypress, Playwright). Skilled in mocking, dependency isolation, refactoring, and peer review. Understanding of accessibility, performance, load, and security testing. Experience building and maintaining ...

deployment pipelines using tools like Azure DevOps or GitHub Actions. Testing Standards: Experience with unit testing frameworks (xUnit/NUnit) and frontend testing tools (Jest/Cypress) as part of standard development practices. The permanent role for a Software Engineering Lead (Full Sack) will pay a salary range ...

OpenShift) Infrastructure as Code (Terraform, Ansible) Relational Databases (e.g. PostgreSQL) Elasticsearch/Opensearch Unit testing/automation and use of testing frameworks (e.g. Mocha, Jest, Cypress) We appreciate you may not be an expert in every area above - we can support with training and development in some areas! Please ...

OpenShift) Infrastructure as Code (Terraform, Ansible) Relational Databases (e.g. PostgreSQL) Elasticsearch/Opensearch Unit testing/automation and use of testing frameworks (e.g. Mocha, Jest, Cypress) We appreciate you may not be an expert in every area above - we can support with training and development in some areas! Please ...

Code (Terraform, Ansible) Data & Search Technologies Relational Databases (e.g. PostgreSQL) Elasticsearch/Opensearch Testing & Quality Unit testing and automation Testing frameworks (e.g. Mocha, Jest, Cypress) Delivery & Collaboration Experience working in an Agile delivery team Use of code repositories (e.g. GitLab); familiarity with branching strategies, pull requests and merge processes ...

OpenShift) Infrastructure as Code (Terraform, Ansible) Relational Databases (e.g. PostgreSQL) Elasticsearch/Opensearch Unit testing/automation and use of testing frameworks (e.g. Mocha, Jest, Cypress) We appreciate you may not be an expert in every area above - we can support with training and development in some areas! Please ...