Senior Frontend Engineer

SkyCell AG

full-time

Posted on: 9/3/2025

Location: 🇬🇧 United Kingdom

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Senior

JavaScriptJestReactReact NativeTypeScriptYarn

About the role

Join SkyCell: mission-driven company revolutionizing digital logistics and healthcare with web and mobile applications.
Design and implement clean, maintainable, and scalable client-side code using TypeScript and React.
Build and iterate on responsive, reliable, and secure web applications that perform across devices.
Ensure product quality with unit tests (Jest) and end-to-end tests (Playwright is a nice-to-have).
Own feature development from idea to deployment, aligning closely with product and design.
Review code, challenge assumptions, and help raise the technical bar across the team.
Mentor less experienced engineers and support team growth through technical guidance.
Help shape frontend architecture and guide long-term decisions (modularity, patterns, performance).
Troubleshoot PROD issues including HotFix coordination and root cause analysis.
Contribute to documentation and ensure developed components are reusable and easy to onboard.
Collaborate with backend devs on API definitions and coordinate with QAs and BAs on new implementations.

Expertise in TypeScript, modern JavaScript, and the React ecosystem (hooks, context, modular design)
Solid grasp of HTML5, CSS3, and responsive design principles
Comfortable working in a fast-paced, iterative, CI/CD environment
Understanding of web security, performance, and accessibility best practices
Experience designing or contributing to scalable frontend architectures
Proficient with Git, npm/yarn, and modern tooling
Familiarity with agile processes and delivering frequently with fast feedback loops
5+ years of relevant professional experience
Nice to have: Experience with MUI v5 or other component libraries/design systems
Nice to have: Exposure to React Native for cross-platform mobile development
Nice to have: Familiarity with React Query, Storybook, or Lighthouse
Nice to have: Experience with GitHub Actions
Nice to have: Experience with frontend monitoring tools (e.g., Sentry, Logz.io)
Nice to have: Understanding of mobile-first and accessibility-first design principles