Senior TypeScript Full Stack Developer for Internal Tools Platform

Keystone Digital

Contract · Remote · Flexible hours

About the role

Keystone Digital is building a high‑impact SaaS platform for enterprise workflow automation. We need a TypeScript Full Stack Developer to lead a test automation uplift for our upcoming "PulseGuard" module, aiming to slash regression risk before each product launch.

Key responsibilities

• Design and implement end‑to‑end test suites for the PulseGuard micro‑frontend using Playwright and Jest.
• Integrate CI pipelines in GitHub Actions to run automated regression tests on every pull request.
• Refactor existing API endpoints in NodeJS/Express to expose test hooks and improve observability.
• Collaborate with QA engineers to define flaky‑test mitigation strategies and reporting dashboards.
• Document test coverage metrics and present weekly risk assessments to the product owner.
• Mentor junior developers on TypeScript best practices and test‑driven development.

Must-have skills

• Advanced TypeScript proficiency with strict typing.
• React (hooks, context) and Redux for state management.
• NodeJS backend development, RESTful APIs, and PostgreSQL.
• Experience with Playwright, Jest, and CI/CD (GitHub Actions or similar).
• Strong debugging skills and familiarity with Docker containers.

Nice to have

• Knowledge of GraphQL and Apollo Server.
• Familiarity with performance testing tools like k6.