Founding Engineer - Full-stack

About Cellbyte

At Cellbyte, we’re building an AI-native platform to help pharma companies launch new drugs worldwide. Cellbyte empowers pharma commercial teams to cut through complexity, analyze previously fragmented data in seconds, and automate high-stakes workflows.

In just a few months, we’ve gone from early pilots to being trusted by global pharma leaders, closing enterprise deals, and scaling profitably with double‑digit month‑over‑month growth. We build fast and iterate closely with customers to make something people want.

You’ll be joining a fast‑growing startup at the exciting intersection of AI and Life Sciences. We're backed by Y Combinator, and have recently raised a Seed round from top‑tier investors to fuel our next phase of global expansion. Life is too short not to build something truly impactful, so join us on our mission to accelerate access to life‑saving medicines.

About the role

In short: own solutions end‑to‑end - from fuzzy idea to measurable outcome.

• Architect, implement, and ship features across our full stack - from UI to cloud infrastructure
• Talk to users to deeply understand real‑world workflows and pain points to develop scale‑worthy solutions.
• Make smart technical trade‑offs between speed and scalability
• Shape the product, culture, and technical direction hand‑in‑hand with the founders
• Build experiences that are beautiful, fast, and effortless for users
• Collaborate closely with product, design, and data to prioritize what’s next based on real‑world impact

Tech stack:

• Frontend: Next.js, React, TypeScript, Tailwind CSS
• Backend & Infra: Node.js, Docker, Azure, Dagster
• AI & Automation: OpenAI, Claude

We’re pragmatic about technology - if a new tool helps us move faster or deliver more value, we adopt it. Always evolving.

You might be a fit if…

• You have full‑stack development experience, with a track record of shipping real‑world products end‑to‑end.
• You believe great software starts with understanding the user. You're proactive about gathering feedback and iterating quickly.
• You have an entrepreneurial mindset – you don’t wait for perfect specs, but turn ambiguity into clarity and high‑impact solutions, bringing structure where there is none.
• You thrive in a fast‑paced, in‑person environment, continuously willing to learn, and master your craft.
• You are resourceful – with a get‑it‑done attitude – deeply committed, and willing to go the extra mile when it matters, because you care deeply about the problems you’re solving and you care about your own work.

Bonus : You have experience in developing AI / ML applications

What you can expect…

• A small, talent‑dense team working in person in Munich.
• An opportunity to tackle meaningful, complex problems alongside ambitious teammates who challenge and support each other to grow.
• A fast‑moving, high‑ownership environment where excellence, creativity, and resourcefulness are the standard - not the exception.
• Firsthand experience in building and scaling a startup - perfect for anyone who wants to become a founder down the line.
• A competitive salary plus equity compensation, along with perks like Urban Sports Club, Bike‑Leasing, and more.
• A cozy office, centrally located in Munich.