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Strong fit if you want hands-on Rails product engineering in Berlin climate/proptech at seed stage—less fit if you need remote-first or a large, specialized backend-only team.
As a Full-Stack Product Engineer on Ruby on Rails at Vrey, a typical day likely spans product features for solar/proptech workflows: Rails services, UI delivery, and tight loops with product on multi-family building use cases—shipping end-to-end, not isolated tickets.
Shared-roof solar solutions aimed at multi-family buildings in Germany, per recent funding coverage.
Berlin HQ (Choriner Straße area, Mitte); the listing is not marked remote.
Public reports cite a €3.3M seed raise to scale solar adoption in multi-family housing.
JOB TITLE: Full-Stack Product Engineer, Ruby on Rails (m/f/d) at Solar StartupCOMPANY: VreyLOCATION: Berlin HQEMPLOYMENT TYPE: Full TimeREMOTE: no The Opportunity Vrey is building the EnergyOS for multi-family buildings, addressing a critical gap in Germany's energy transition. With over 3.3 million apartment buildings, this sector represents a significant untapped potential for solar power and smart metering integration. Vrey combines certified meter operation with proprietary software to enable property owners to sell self-generated solar power directly to their tenants, turning regulatory obligations into profitable opportunities. Day-to-Day Responsibilities Develop full-stack web applications using Ruby on Rails Collaborate with cross-functional teams including designers and product managers Ensure high-quality code through rigorous testing and continuous integration Optimize existing systems for performance and scalability Work closely with data to build robust, user-friendly interfaces Who We're Looking For We are seeking a Full-Stack Product Engineer with 2+ years of professional experience in building full-stack web applications. A strong background in Ruby on Rails is essential, along with proficiency in JavaScript and HTML/CSS. Experience with database management (SQL/NoSQL) and version control systems (Git) is required. Additionally, you should have a passion for solving complex problems and a commitment to delivering high-quality software. More About Vrey Vrey has already managed a three-digit number of projects across all 16 federal states in Germany, including some of the country's largest property holders and housing cooperatives. Recently, we secured €3.3M in seed financing from leading impact and energy venture capital firms like Rubio Impact Ventures, HTGF, and Kopa Ventures. As we enter our next growth phase, we're expanding our team to help build the leading EnergyOS. How to Apply To apply, complete your application directly on this page, or you'll be redirected to the employer's application platform to finish submitting there.
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