Full Stack Developer (all)

As our Full-Stack Developer, you will help shape the transition of our medical annotation tooling from an integrated system into a standalone platform used across multiple products. Working across the stack, you will build and evolve a web-based annotation system for medical imaging workflows - including a browser-based 3D viewer built with Cornerstone.js and Python backend services for handling volumetric MRI data and annotations. The role combines frontend development, imaging workflows, and backend infrastructure, with a strong focus on scalability, usability, and performance for clinical experts and downstream ML use cases.

• Lead the development of a new web-based annotation platform, built largely from scratch while adopting key functionality from the existing ecosystem.

• Maintain and extend our existing web-based annotation application, including integration of the Cornerstone.js-based medical viewer developed by our Software team.

• Design and implement a Python-based backend for annotation loading, saving, and state management of volumetric 3D imaging data.

• Work with 3D medical images (MRI) and segmentations, ensuring accurate and high-performance rendering in the browser.

• Build advanced annotation and editing tools, such as 3D region growing and brush-based workflows, and optimize platform performance across different hardware setups.

• Act as the technical bridge between Software team (maintain the core viewer), radiologists (annotate the datasets), and ML teams (consuming annotated datasets).

• 3+ years of professional experience in Full-Stack development, preferably in a startup or medtech environment.

• Strong frontend experience with React or similar, JavaScript (ES6+), HTML, and CSS. Experience with UI frameworks such as shadcn/ui or Tailwind, and UI patterns for high-density data.

• Solid backend experience with Python or similar (e.g. Node.js, C#, Go, Java), including frameworks such as FastAPI, Flask, Django, or Litestar.

• Strong focus on clean code, testing, and documentation. Familiar with modern DevOps practices (Docker, GitLab CI/CD).

• Strong problem-solving mindset and experience working in interdisciplinary teams (Software, Data, ML, and radiologists).

Nice to have

• Experience with medical imaging libraries such as Cornerstone.js, VTK.js, or ITK.js, and familiarity with DICOM or NIfTI data formats.

• Hands-on experience with AWS (or similar cloud platforms) and relational databases such as PostgreSQL.

• Understanding of radiology workflows or experience building tools for clinical specialists.

• Focus on what matters: At our company, competence, personality, and commitment are more important than formalities or the study program you chose.

• Your Impact: Your work helps make disease diagnosis faster, more precise, and more manageable.

• Your Team: Join a highly motivated, interdisciplinary team with fast decision-making processes and a collaborative atmosphere.

• Freedom to choose: Work remotely or from our office in Berlin-Kreuzberg - whatever suits you best.

• Benefits: Use your personal benefits budget flexibly and choose the perks that suit you best!