Our HTGF Portfolio of startups offers excellent opportunities and is always hiring talented people.
VREY
Software Engineering
Berlin, Germany
Berlin HQ
Full time
On-site
Product
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. <1% solar penetration. <2% smart metering. Almost no flexibility or intelligent energy management.
At the same time, regulation is forcing property owners into major investment: solar is becoming mandatory, smart meters must be rolled out nationwide within five years, heating and mobility are electrifying. The apartment building is transforming from passive real estate into an active part of the decentralised energy infrastructure.
What's missing is an integrated system that makes this transition economically viable and operationally manageable.
VREY combines certified meter operation with proprietary software, enabling property owners to sell self-generated solar power directly to their tenants — simply, and without having to become an energy supplier themselves (§42b EnWG). Regulatory obligation becomes a profitable, predictable opportunity:
Double-digit returns and asset appreciation for owners,
~20% electricity cost savings for tenants, and
digital infrastructure for storage, heat pumps, and flexibility.
We already manage a three-digit number of projects — including some of Germany's largest property holders and housing cooperatives — in all 16 federal states. In the course of our seed financing, we raised €3.3M from leading impact and energy VCs (including Rubio Impact Ventures, HTGF, and Kopa Ventures). We're now entering the next growth phase and expanding our team.
We're at the beginning of a structural market shift. Join us and help build the leading EnergyOS.
You have 2+ years of professional experience building and running full-stack web applications, ideally with Ruby on Rails. Comparable frameworks (Django, Laravel, Spring Boot, NextJS) are fine if you are genuinely ready to move into Rails.
You have a strong understanding and hands-on experience designing and optimizing relational database schemas (we use PostgreSQL).
You are used to working with APIs and integrating with 3rd-party services.
You have solid experience setting up and maintaining cloud/server infrastructure. We have a basic Heroku setup and Github CI/CD and need to gradually scale and improve monitoring etc.
You have strong frontend development skills, ideally with solid fundamentals (HTML, CSS and JavaScript), as well as familiarity with both the Rails way (Hotwire, Turbo and Stimulus) and a framework like React or Vue.
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 truely agile way.
You are based in Berlin (or willing to relocate). Our office in Friedrichshain is our home base, with occasional remote days by arrangement.
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.)
Nice to have: You have experience working with multi-tenancy systems and/or are experienced with payment provider integration (e.g., Stripe Connect)
You will be an early member of our growing product development team, working across the entire stack.
The core functionality of the VREY platform is processing smart meter measurement data for analyzing and billing solar power usage. For this purpose, we provide landlords and tenants with a portal and automate contract management, invoicing and payment flows. An admin interface and integration with internal tools enable the creation and management of projects.
While working on features and integrations, you also help us improve our infrastructure and backend processes, enabling our platform to scale.
1. Full-stack feature development
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 engineering quality, finding the righ balance between speed and quality
2. Data processing, automation and reliability
You work on the core of our platform - reliable and accurate processing of smart meter measurement data - and build and maintain import pipelines and billing automation that run this.
You help automate operational processes around project setup, metering data, contract management and billing
You instrument, optimize and monitor critical processes so they remain fast, reliable and dependable as we scale
3. Technical design, architecture and engineering excellence
You research, evaluate and design technical solutions to new problems together with the engineering 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 in residential buildings, and accelerates the economic decarbonisation of Germany's housing stock.
Great workplace — Office in a cool co-working space in Berlin-Friedrichshain, with free drinks, cerials, fruits, and plenty of lunch options nearby.
At VREY, we believe that diversity strengthens both our company and society. We do not make hiring or employment decisions based on race, religion, ethnicity, nationality, gender identity, sexual orientation, disability, or age.
Even if you don't meet every requirement, don't hesitate to apply. If you're excited about our mission and believe you can contribute, we want to hear from you!