Senior Fullstack Engineer (all identities) in Berlin

Das erwartet Dich Caspar Health builds digital rehabilitation products that enable patients to continue their therapy beyond the clinic and help therapists support them more efficiently. As a Senior Fullstack Engineer in our Healthcare Professionals Squad, you will build and improve the interface therapists use to manage their daily work. Working across our Ruby on Rails backend and React and TypeScript frontend, you will shape solutions with Product and Design and take them from an initial problem through to production. You will join a cross-functional team of four engineers and a UX/UI Designer. Together, you will improve how healthcare professionals communicate with patients and deliver therapy—while shaping the architecture, reliability and maintainability of the underlying software. We appreciate your expertise and wish to provide full transparency regarding the compensation range for this role. Your starting salary will be aligned with your qualifications, relevant experience, skill set, and market benchmarks. Remuneration for this position follows our internal salary bands and ranges from €76,000 to €82,000 gross annually (based on a full-time 40-hour work week). Deine Herausforderungen In this role, you will: Learn the workflows supported by our therapist interface, become familiar with our architecture and ship your first improvements during your first three months Take ownership of larger full-stack features—from shaping requirements with Product and Design to implementation, testing, release and iteration Build and improve features across our Ruby on Rails backend and React and TypeScript frontend Make technical implementation decisions about code structure, testing approaches and incremental refactoring Decide how to break down and deliver work within agreed priorities and engineering standards Lead technical recommendations for changes affecting shared architecture, other teams or delivery commitments Improve the therapist experience as well as the reliability and maintainability of the underlying software Dein Profil Several years of experience building and operating web applications in production Strong experience with Ruby on Rails and experience with React and modern TypeScript Strong understanding of relational databases (PostgreSQL), APIs, and testing The ability to navigate ambiguous requirements, make sound technical trade-offs and turn problems into maintainable solutions A product mindset: you seek to understand the intended outcome rather than treating implementation as an isolated task The judgement and independence to take work from an initial problem through to a production result Professional working proficiency in English You do not need to meet every requirement perfectly. If the role interests you and you believe your experience could help us improve the platform, we encourage you to apply. Warum Caspar Health? Remote-first with flexible working hours – office optional in Berlin-Mitte or up to 90 days a year outside of Germany To match this, we support you with a monthly home office allowance and an additional meal subsidy Plenty of time to recharge – with 30 vacation days per year Budget for learning & development, conferences, and coaching – tailored to your potential and growth opportunities High level of ownership and decision-making freedom – no micromanagement. We hire experts who know what they’re doing. #MakeAnImpact! Genuine collaboration – no silos, no egos. After all, we’re all working toward the same vision. #ValueFocus! Access to all Caspar offerings for mental and physical well-being #HealthyTogether! And yes – all the snacks your heart desires, group sports sessions, a never-empty drinks fridge, and a healthy dose of humor are included too What defines us as a team We live diversity – it's not a marketing slogan, it's part of our everyday reality Feedback isn’t a tool – it’s part of our culture We believe that technology only makes sense when it truly helps people Our drive is purpose – but our standard is professionalism