Senior Backend Engineer Ro

About the role

We are looking for a Senior Backend Engineer to join our team in Berlin. You will be designing how our patients use the app in the future by taking ownership of our core ecosystem and building backend architectures that solve real-world patient needs.

What you'll do

• Design, build, and improve high-performance APIs and services that power the Caspar Health app, ensuring scalability, resilience, and operational excellence
• Design, build, and improve LLM-powered workflows and contribute to developing a multi-agent environment to enhance engineering productivity and efficiency
• Partner with Product, UX, DevOps, and Engineering teams to deliver robust solutions and contribute to technical discussions, architecture decisions, and engineering best practices
• Champion best practices in code quality and test automation

What you'll need

• Expert in Ruby on Rails and TypeScript, with a track record of running these stacks in high-stakes production environments
• Robust understanding of PostgreSQL and comfortable navigating AWS (Cognito), Docker, and Kubernetes
• Experience with end-to-end testing frameworks and guide the team in implementing best practices for test coverage and code quality
• Understanding of the mobile ecosystem and experience with React Native to design backend architectures that harmonize with the frontend
• Proponent of continuous delivery and highly experienced in Over-the-Air (OTA) updates
• Use LLMs as a force multiplier in your daily coding with a vision for how autonomous agents can transform software development

What they offer

• Remote-first with flexible working hours – office optional in Berlin-Mitte or up to 90 days a year outside of Germany
• Monthly home office allowance and additional meal subsidy
• 30 vacation days per year
• Budget for learning, development, conferences, and coaching
• High level of ownership and decision-making freedom
• Access to all Caspar offerings for mental and physical well-being