<p><span style="font-size: 12pt; color: rgb(230, 126, 35);"><strong>Clariness is looking for a Full Stack Engineer (f/md/) based in Berlin or Hamburg.<br></strong><strong>- Full-time; unlimited -</strong></span></p> <p><span style="color: rgb(230, 126, 35); font-size: 12pt;"><strong><span data-contrast="none">About the role:</span></strong> </span></p> <p>As a Full Stack Engineer, you will help build and enhance Clariness' digital platform supporting clinical trial recruitment and patient engagement. 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.&nbsp;This role is ideal for someone who enjoys solving technical challenges, collaborating with multidisciplinary teams, and continuously improving both products and engineering practices.</p> <p><strong><span style="font-size: 12pt; color: rgb(230, 126, 35);">As a Full Stack Engineer, you would be responsible for:</span></strong></p> <ul> <li>Designing, developing, and maintaining new features for our Next.js-based clinical trial platform.</li> <li>Taking full ownership of your code, features, and overall product quality.</li> <li>Optimizing application performance across APIs, databases, frontend rendering, and accessibility.</li> <li>Writing clean, maintainable, and well-tested code (unit, integration, and end-to-end).</li> <li>Collaborating closely with engineers, designers, and product managers in an agile environment.</li> <li>Participating in code reviews, technical discussions, and initiatives to reduce technical debt.</li> <li>Contributing to scalable engineering practices and the continuous improvement of our applications.</li> </ul> <p><span style="color: rgb(230, 126, 35); font-size: 12pt;"><strong>We would like you to have:&nbsp;</strong></span></p> <ul> <li>2+ years of professional experience in JavaScript development, ideally with TypeScript.</li> <li>Experience with modern frontend frameworks such as Next.js, React, Angular, Vue, or Svelte.&nbsp;</li> <li>Experience building backend applications using technologies such as Node.js, Express, NestJS, or Next.js.</li> <li>Solid understanding of relational databases such as PostgreSQL or MySQL; experience with NoSQL databases is a plus.</li> <li>Experience with unit and integration testing (Jest, Karma, or similar) is a plus.</li> <li>Familiarity with containerized environments (Docker, Kubernetes) is a plus.</li> <li>Knowledge of CI/CD pipelines and build tools (GitLab CI, GitHub Actions, Jenkins) is a plus.</li> <li>Degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience. Next.js or AWS certifications are a bonus.</li> <li>Fluency in English.</li> <li>Strong problem-solving, communication, and collaboration skills.</li> <li>Proactive, quality-focused mindset with a passion for continuous learning and improvement.</li> </ul> <p><span s