Clariness is looking for a Full Stack Engineer (f/md/) based in Berlin or Hamburg.
- Full-time; unlimited -.
Working as part of a cross-functional product team, you will develop new features, improve application performance, and contribute to creating scalable, high-quality software that delivers value to our users.
This role is ideal for someone who enjoys solving technical challenges, collaborating with multidisciplinary teams, and continuously improving both products and engineering practices.
As a Full Stack Engineer, you would be responsible for: Designing, developing, and maintaining new features for our Next.
js-based clinical trial platform.
Taking full ownership of your code, features, and overall product quality.
Optimizing application performance across APIs, databases, frontend rendering, and accessibility.
Writing clean, maintainable, and well-tested code (unit, integration, and end-to-end).
Collaborating closely with engineers, designers, and product managers in an agile environment.
Participating in code reviews, technical discussions, and initiatives to reduce technical debt.
Contributing to scalable engineering practices and the continuous improvement of our applications.
We would like you to have: 2+ years of professional experience in JavaScript development, ideally with TypeScript.
Experience with modern frontend frameworks such as Next.
js, React, Angular, Vue, or Svelte.
Experience building backend applications using technologies such as Node.
js, Express, NestJS, or Next.
Solid understanding of relational databases such as PostgreSQL or MySQL; experience with NoSQL databases is a plus.
Experience with unit and integration testing (Jest, Karma, or similar) is a plus.
Familiarity with containerized environments (Docker, Kubernetes) is a plus.
Knowledge of CI/CD pipelines and build.