Senior Backend Engineer, RoR

Role Overview

• Design, build, and improve high-performance APIs and services for the Caspar Health app
• Design, build, and improve LLM-powered workflows
• Collaborate with Product, UX, DevOps, and Engineering teams
• Champion best practices in code quality and test automation

Requirements

• Expert in Ruby on Rails and TypeScript
• Robust understanding of PostgreSQL
• Comfortable navigating AWS (Cognito), Docker, and Kubernetes
• Experience with end-to-end testing frameworks (like Cypress)
• Understanding of the mobile ecosystem and experience with React Native

Tech Stack

• AWS
• Cypress
• Docker
• Kubernetes
• Postgres
• React
• React Native
• Ruby
• Ruby on Rails
• TypeScript

Benefits

• 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
• Additional meal subsidy
• 30 vacation days per year
• Budget for learning & development, conferences, and coaching
• High level of ownership and decision-making freedom
• Genuine collaboration – no silos, no egos
• Access to all Caspar offerings for mental and physical well-being
• Snacks, group sports sessions, drinks fridge, and a sense of humor included