Full-Stack Engineer

At VREY, we're building the EnergyOS for multi-family buildings. Germany has over 3.3 million apartment buildings — and they are the blind spot of the energy transition. VREY combines certified meter operation with proprietary software, enabling property owners to sell self-generated solar power directly to their tenants.

• You have 2+ years of professional experience building full-stack web applications, ideally with Ruby on Rails. Experience in comparable MVC frameworks (Django, Laravel, Spring Boot, NestJS) will also be considered, if you are truly motivated to learn and work with Rails.
• You have strong frontend development skills with solid fundamentals (HTML, CSS and JavaScript), as well as familiarity with the Rails-specific frontend technology (Hotwire, Turbo and Stimulus) and a framework like React or Vue.
• You have an eye for UI and UX - you know interface patterns, think from a user's point of view and have worked with design systems.
• You're comfortable designing and optimizing relational database schemas (we use PostgreSQL).
• You are used to working with APIs and integrating with 3rd-party services.
• You are familiar with cloud infrastructure - Heroku, AWS, or similar - including CI/CD pipelines and basic monitoring.
• You are actively working with AI and pushing for efficient agentic setups; we are establishing Claude Code in the team and the whole company.
• You like to take ownership for the features and components you work on and you are proactive in the product development.
• You are excited about startups and want to make a real impact on the product and the company in a truly agile way.
• You are based in Berlin (or willing to relocate). You will enjoy working in our office in Friedrichshain with the team most of the time, with the flexibility of 1-2 remote work days a week.
• You are willing to learn energy industry terms in English and German and being comfortable with some parts of the company operating mostly in German. (Team language is English.)

• Full-stack feature development and UI quality: You co-design and build features across the full stack, from database to UI. You work directly with product management, design and users to get the details right. You help raise the bar on frontend quality by improving code structure and contributing to consistent design patterns that scale across the product.
• Data processing, automation and reliability: You work on our crucial processes: importing and processing of smart meter measurement data and automated billing. You participate in designing and maintaining the underlying server infrastructure. You instrument, optimize and monitor critical processes so they remain fast, reliable and dependable as we scale.
• Technical design, architecture and engineering excellence: You research, evaluate and design technical solutions to new problems together with the team. You contribute to our aspiration to get better and more efficient as engineers and as a team every day. You continuously improve our development environment and engineering processes, including adopting the right tools, workflows and AI-powered development practices.

• Competitive salary including shares based on the level of your experience.
• Real ownership: You shape VREY actively from day one. Ownership means responsibility for your tasks end-to-end and the opportunity to take leadership.
• Visible impact: We ship features every day that make a difference for our customers and colleagues.
• Personal and professional growth: We have very skilled and experienced people on the team that you can learn from and we actively provide opportunities to develop your career.
• Making a difference: Our daily work reduces energy costs for tenants, advances the energy transition.