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This job expired on 31/08/2026. It no longer accepts applications.

Full Stack Engineer (f/m/d)

Clariness · Berlin

🇬🇧 English
JavaScript TypeScript Next.js React Angular Vue Svelte Node.js Express NestJS PostgreSQL MySQL Jest Karma Docker Kubernetes GitLab CI GitHub Actions Jenkins

Job description

About the role

As a Full Stack Engineer you will help build and enhance Clariness' digital platform that supports clinical trial recruitment and patient engagement. You will work within a cross‑functional product team, delivering new features, improving performance, and ensuring high‑quality software for our users.

Key responsibilities

  • Design, develop, and maintain new features for a Next.js‑based platform.
  • Take full ownership of code, features, and overall product quality.
  • Optimize performance across APIs, databases, frontend rendering, and accessibility.
  • Write clean, maintainable, well‑tested code (unit, integration, end‑to‑end).
  • Collaborate with engineers, designers, and product managers in an agile environment.
  • Participate in code reviews, technical discussions, and technical debt reduction initiatives.
  • Contribute to scalable engineering practices and continuous improvement.

Required profile

  • 2+ years of professional JavaScript development experience.
  • Fluency in English with strong problem‑solving and communication skills.
  • Proactive, quality‑focused mindset and a passion for continuous learning.

Required skills

  • JavaScript, TypeScript
  • Next.js, React (or other modern frontend frameworks such as Angular, Vue, Svelte)
  • Node.js, Express, NestJS
  • Relational databases: PostgreSQL, MySQL (NoSQL experience a plus)
  • Unit and integration testing tools (e.g., Jest, Karma)
  • Docker, Kubernetes (optional)
  • CI/CD pipelines (GitLab CI, GitHub Actions, Jenkins – optional)

What we offer

  • Varied and exciting role with personal responsibility in an international company.
  • Professional and personal development budget.
  • Flexible working hours and mobile working options.
  • Regular team events and an open feedback culture.
  • Supportive, diverse, and collaborative company environment.

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Published 2 months ago

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Clariness

Berlin