Full Stack Developer (all) - React/Python MedTech

Join us in building a next-generation medical imaging and annotation platform using React, Python, and AI-driven healthcare workflows. 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 scalable 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, medical imaging workflows, and backend infrastructure, with a strong focus on scalability, usability, and performance for clinical experts and downstream ML applications.

• 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.
• Collaborate closely with Software, ML, and clinical teams, acting as the technical bridge between engineers, radiologists, and downstream AI workflows.
• Contribute to architectural decisions, scalability improvements, testing, and developer experience across the platform.

• 3+ years of professional experience in Full-Stack development, ideally in a startup, SaaS, healthcare, or MedTech environment.
• Strong frontend experience with React or similar frameworks, JavaScript (ES6+), TypeScript, HTML, and CSS.
• Experience with modern UI frameworks and component systems such as Tailwind, shadcn/ui, or similar approaches for high-density interfaces.
• Solid backend experience with Python and frameworks such as FastAPI, Flask, Django, or Litestar. Experience with alternative backend stacks (Node.js, C#, Go, Java) is also welcome.
• Experience building scalable web applications and APIs with a focus on clean architecture, maintainability, and performance.
• Familiarity with Docker, GitLab CI/CD, testing, and modern DevOps workflows.
• Strong problem-solving mindset and experience working in interdisciplinary teams across Software, Data, ML, and clinical domains.

Nice to have

• Experience with medical imaging libraries such as Cornerstone.js, VTK.js, or ITK.js.
• Familiarity with medical imaging standards and formats such as DICOM or NIfTI.
• Hands-on experience with AWS or similar cloud platforms.
• Experience with PostgreSQL or other relational databases.
• Understanding of radiology workflows or experience building tools for clinical specialists.
• Interest in AI-driven healthcare products and medical imaging technologies.

• 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!