erasys GmbH

Senior Frontend Developer

erasys GmbH

full-time

Posted on:

Location Type: Hybrid

Location: Berlin • Germany

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Job Level

Senior

Tech Stack

JavaScriptNext.jsReactReact NativeSCSSTypeScript

About the role

  • Develop, and maintain scalable cross-platform applications using React.js and React Native.
  • Participate in requirement discussions, technical design, and code reviews.
  • Collaborate with designers, and product managers to deliver exceptional user experiences.
  • Optimise frontend performance, stability, and usability across browsers and devices.
  • Collaborate with backend engineers to integrate APIs and ensure reliable data flow.
  • Deliver features according to requirements and agreed delivery timelines.
  • Research and experiment with new technologies to support the evolution of frontend engineering practices within the team.

Requirements

  • Extensive experience (5+ years) with React, TypeScript, and modern frontend development, with a proven track record of architecting scalable solutions.
  • Experience with server-side rendering (SSR), static site generation (SSG), and API routes in Next.js.
  • Advanced understanding of web performance optimization, especially related to Core Web Vitals, SSR patterns, and monitoring tools like Sentry.
  • Deep knowledge of modern CSS, including preprocessors (e.g., SASS), and extensive experience utilizing utility-first CSS frameworks like Tailwind CSS to build maintainable and scalable UIs.
  • Ensure accessibility, responsiveness, and cross-browser compatibility.
  • Excellent analytical and problem-solving skills.
  • Able to lead and drive technical projects and improvements across an engineering organization.
  • Ability to write efficient, maintainable, and scalable code.
  • Strong communication skills with the ability to work effectively in a team environment.
  • Mentor and coach mid-level engineers, raising the quality bar for code reviews, testing practices, and overall system design.
  • Demonstrated ability to mentor engineers and contribute to team-wide knowledge sharing.
  • Background in monorepos, one-app architectures, and shared-type and component strategies between Web and React native.
Benefits
  • Everything you need to do a great job (MacBook etc.)
  • Free weekly German classes to help you adjust to Berlin life.
  • Wellpass gym access and a lot of other perks.
  • Flexible hours with hybrid working between our great offices and from home.
  • A friendly, diverse group of colleagues from all different nationalities, genders and orientations!
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
React.jsReact NativeTypeScriptserver-side renderingstatic site generationAPI routesweb performance optimizationCSSSASSTailwind CSS
Soft Skills
analytical skillsproblem-solving skillsleadershipcommunication skillsmentoringteam collaboration