Senior Full-Stack Developer (Next.js/TypeScript) – German Proptech Venture

Project Y is hiring on behalf of a one of Germany’s fastest-growing PropTech startups.

Based in Berlin and with an international team, the venture is transforming the way energy consumption data is collected and managed.

We’re looking for a Senior Full-Stack Engineer to join an experienced, fast-moving team and take ownership of building, maintaining, and scaling a product used by customers across Europe.

As a Senior Full-Stack Developer, you will take ownership of building our new web dashboard - a responsive, high-performance interface for property managers and tenants to view, manage, and analyze real-time consumption data. You’ll work closely with product and backend teams to design scalable features, implement secure integrations, and ship elegant UI components.

This is a high-agency role suited to someone who thrives in autonomous environments, enjoys solving complex technical problems, and can translate product goals into elegant, scalable code. You’ll be trusted to ship independently, contribute to product direction, and ensure every release is robust and production-ready.

About the company

Their intelligent system enables wireless and automatic reading of heat and water meters — giving property managers and residents real-time transparency, regulatory compliance, and full digital control over energy data.

With operations across Germany, Austria, Denmark, and Switzerland, Heidi Systems combines innovation, sustainability, and reliability to make buildings smarter and more efficient.

Why join:
✅ Work at the intersection of IoT, sustainability, and digitalization
✅ Be part of a scaling European tech company with a strong mission
✅ Contribute to climate-friendly energy management in real estate