Senior Fullstack Engineer (all identities) arbeitnow Caspar Health Berlin · 10/14/2026

Primetime; Berlin; Hybrid; EUR 76,000 - 82,000; Full time

Benefits offered by this job

Home office allowance

Meal subsidy

30 vacation days

Learning budget

Flexible work hours

Job summary

Caspar Health seeks a Senior Fullstack Engineer to join the Healthcare Professionals Squad. You will work across Ruby on Rails backend and React with TypeScript frontend to build the therapist interface and scale workflows for daily operations.

You’ll join a small cross-functional team and influence architecture, reliability and maintainability while delivering production-ready features. Excellent English and several years of production web app experience are required.

Qualifications

• Several years of experience building and operating web applications in production.
• Strong experience with Ruby on Rails and React with modern TypeScript.
• Strong understanding of relational databases (PostgreSQL), APIs and testing.
• Professional working proficiency in English.

Responsibilities

• Learn the workflows of the therapist interface and ship improvements in the initial months.
• Own larger full-stack features from requirements to implementation, testing, release and iteration.
• Build and improve features across Rails backend and React/TypeScript frontend.
• Make technical decisions about code structure, testing approaches and refactoring.
• Deliver work within priorities and engineering standards and lead architectural changes.
• Improve therapist experience while ensuring reliability and maintainability of software.

Skills

Ruby on Rails

React

TypeScript

PostgreSQL

APIs

Testing

Job description

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).

This role is located in Germany and requires full physical presence within the country. Due to our existing payroll and social security framework, permanent remote employment from abroad is not supported. Candidates must be eligible to work in Germany and resident from their first day. Please be advised that we cannot offer visa sponsorship or relocation assistance at this time.

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
• 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

• 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

This overview was written from the original listing to help you understand the role. Always confirm the specifics on the employer's application page.