Senior Backend Engineer RoR (all identities) | JobSetuu

Description

Job Overview

• Source: Arbeitnow
• Location: Berlin
• Job Type: Full-Time

Job Description

What to Expect

Caspar Health is the digital rehabilitation clinic with the vision of giving every patient access to the most effective rehabilitation treatment anywhere at any time. We provide individual, digital therapy combined with personal therapeutic care from healthcare professionals. This is your opportunity to help shape traditional healthcare concepts in the areas of prevention and rehabilitation so that people receive the best possible care during and after their clinic stay, regardless of their location.

We are looking for a Senior Backend Engineer (all identities) to join our team in Berlin. It is an exciting time to work at Caspar because you will be the one designing how our patients will use the app in the future.

You are a fit for this role if…

• You own the Product , not just the Ticket: You think in solutions, not tasks, and build backend architectures that solve real-world patient needs
• You are an AI-Native Engineer: You’ve mastered LLMs and Multi-Agent setups as strategic tools to accelerate development and stay ahead of the curve
• You bridge the Stack: You are a Backend expert who naturally understands Mobile constraints, ensuring seamless performance from the API to the device

Your Challenges

Forget ticket-punching. We’re looking for someone to take ownership of our core ecosystem:

• Architectural & Backend Engineering: You will design, build, and improve high-performance APIs and services that power the Caspar Health app, ensuring scalability, resilience, and operational excellence.
• AI Frontier: We don’t just talk about AI; we build with it. You will design, build, and improve LLM-powered workflows and contribute to developing a multi-agent environment to enhance engineering productivity and efficiency.
• Cross-Functional Collaboration: You will partner with Product, UX, DevOps, and Engineering teams to deliver robust solutions and contribute to technical discussions, architecture decisions, and engineering best practices.
• Raising the Bar: You will champion best practices in code quality and test automation (e.g., Cypress)

Your Profile

• The Backend Core: You are an expert in Ruby on Rails and TypeScript, with a track record of running these stacks in high-stakes production environments
• Infrastructure & Scale: You have a robust understanding of PostgreSQL and are comfortable navigating AWS (Cognito), Docker, and Kubernetes
• Quality & Testing: You have experience with end-to-end testing frameworks (like Cypress) and guide the team in implementing best practices for test coverage and code quality
• The Mobile Bridge: You understand the mobile ecosystem. Experience with React Native will help you design backend architectures that harmonize perfectly with the frontend
• Modern Delivery: You are a proponent of continuous delivery and highly experienced in Over-the-Air (OTA) updates, ensuring a seamless experience for our patients
• AI-Native Mindset: You already use LLMs as a force multiplier in your daily coding and have a clear vision for how autonomous agents can transform software development
• Collaborative Challenger & Communicator: You don’t just execute; you elevate. Driven by a proactive "can-do" attitude, you thrive on challenging the status quo to drive mutual growth. As a true team player, you bridge the gap between high-level tech and business value, translating complex concepts into clear, compelling narratives for non-technical stakeholders

Why 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.

Diversity and Inclusion:

At Caspar Health, we strive to provide a friendly, safe and welcoming environment for all Casparians* regardless of ethnic origin, gender, gender identity and expression, sexual orientation, limitations of any kind, physical appearance, social background, age or religion (or lack thereof).

When you apply, we purely focus on your experience and motivation. You decide what additional information you want to disclose (picture, marital status, religion, gender, nationality, etc). We value and treat all applications equally.

We are looking forward to getting to know you!

Your Contact

Elisabeth Hegele; Talent Acquisition Specialist

Please submit your application online. We are also interested in knowing your earliest possible start date and your salary expectations. If you have further questions please reach out to

Our product CASPAR Health is used in the environment of medical institutions, patients, doctors and therapists. Working with (sensitive) personal data (e.g. health data) is part of our daily work. Therefore, we require a high level of commitment to the protection of personal data from our employees in order to protect the rights of the data subjects as best as possible.

Note on data protection:

Please apply exclusively via our career site, as this is the only way we can guarantee the protection of your data. You can find our privacy policy .

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Expert Career Tips for Senior Backend Engineer RoR (all identities) Roles

To succeed in a competitive market as a Senior Backend Engineer RoR (all identities), you need more than just technical skills. Here are some expert strategies to elevate your profile:

• Build a Strong Portfolio: For technical roles, a clean GitHub or a personal project site is essential. For non-technical roles, a case study portfolio demonstrating problem-solving and impact is equally valuable. Show, don't just tell, what you have achieved in your previous positions.
• Master the Narrative: When interviewing, use the STAR method (Situation, Task, Action, Result) to structure your answers. Quantify your results wherever possible—mentioning "increased efficiency by 20%" is much more impactful than saying "improved efficiency."
• Continuous Learning: The industry moves fast. Whether it's staying updated with the latest AI tools or mastering a new management methodology, continuous professional development is key. Consider obtaining industry-recognized certifications that align with Senior Backend Engineer RoR (all identities) requirements.
• Networking: Connect with other professionals in similar roles. Join online communities, attend webinars, and engage in meaningful discussions on professional social networks. Often, the best opportunities come through referrals and community engagement.
• Soft Skills Matter: Communication, empathy, and leadership are often the deciding factors between two equally qualified technical candidates. Cultivate these skills as they are universally valued across all industries and seniority levels.

Additionally, research the specific company's culture and values. Tailoring your application to show how you align with their mission can significantly increase your chances of moving forward in the process.

Salary & Compensation

Salary not disclosed; typically competitive for the role.

Work Arrangement

Type: On-Site

Standard business hours at the office.

Comprehensive Application Strategy & Hiring Process

Applying for a new role is a marathon, not a sprint. Follow this strategic approach to maximize your success rate:

1. Initial Research & Tailoring

Don't send the same resume to every employer. Spend at least 30 minutes researching the company. Look for recent news, their product roadmap, and their team structure. Modify your summary and core competencies to reflect the specific keywords found in the job description.

2. The Perfect Cover Letter

If the application allows for a cover letter, use it to tell a story that your resume cannot. Explain why you are passionate about this specific company and how your unique background makes you the perfect fit for the challenges they are currently facing.

3. Navigating the Multi-Stage Interview

Most modern hiring processes involve 3-5 stages. This typically includes a recruiter screen, a technical or skill-based assessment, a peer interview, and a final leadership round. Prepare for each stage differently: focus on enthusiasm and fit for the recruiter, technical depth for the assessment, and strategic vision for the leadership round.

4. Post-Interview Follow-Up

Always send a personalized thank-you note within 24 hours of each interview. Reference a specific topic discussed during the call to demonstrate your active listening and genuine interest in the role.

By following these steps, you demonstrate a high level of professionalism and attention to detail that sets you apart from the average applicant.

Typical Interview Process

1. Resume screening
2. HR call
3. Skill interview
4. Final manager interview
5. Offer

Tip: Research the company's products and culture.

Global Market Intelligence & Relocation Insights

At JobSetuu, we specialize in helping talent navigate the global job market. Here is what you need to know about the current landscape in Berlin and beyond:

The demand for skilled professionals is increasingly borderless. For roles based in Berlin, understanding the local cost of living, visa requirements (if applicable), and cultural nuances is vital. If this is a remote role, consider the time zone alignment and the asynchronous communication culture of the hiring organization.

Relocation Support: Many forward-thinking companies offer relocation packages that include moving stipends, temporary housing, and legal assistance with work permits. When evaluating an offer, look beyond the base salary—consider the total compensation package, including equity, bonuses, and healthcare benefits.

Work-Life Balance Trends: Hybrid and remote work have become standard in many regions. Research the local labor laws and common practices regarding work hours and vacation time to ensure the role aligns with your lifestyle goals.

Leveraging JobSetuu's tools can help you compare salaries across different cities and understand the "purchasing power" of your potential offer, ensuring you make an informed decision for your long-term career path.

Skills & Competency Roadmap for Professional Development

To remain competitive in Professional Development, we recommend focusing on the following core competencies over the next 12-18 months:

• Technical Mastery: Deepen your expertise in the core tools and languages relevant to your field. For developers, this might be cloud architecture; for marketers, it might be data-driven attribution modeling.
• AI Augmentation: Learn how to leverage generative AI and automation tools to increase your productivity. Understanding how to integrate these technologies into your workflow is becoming a non-negotiable skill.
• Leadership & Strategy: Even in individual contributor roles, the ability to think strategically and lead projects from inception to completion is highly valued. Focus on stakeholder management and high-level project planning.
• Data Literacy: The ability to interpret data and use it to drive decisions is essential across all business functions. Familiarize yourself with data visualization and basic analytical concepts.

By investing in these areas, you not only prepare yourself for the role you are applying for today but also build a resilient foundation for the opportunities of tomorrow.

Apply via JobSetuu

Discover your next career milestone on JobSetuu. This Senior Backend Engineer RoR (all identities) position is part of our commitment to bringing you the most relevant and high-impact job openings globally. At JobSetuu, we simplify your job search by aggregating premier listings and providing the tools you need to stand out. Don't miss the chance to elevate your professional journey—explore more opportunities and career insights on our platform today.