Job description
(Senior) Full Stack Engineer @ ClimateTech
Company Overview
Buildings are the largest energy consumers in Europe, making them CO₂ monsters. They account for 40% of our energy usage, causing 36% of all EU CO₂ emissions. That's why the decarbonization of buildings is essential for a sustainable future.
At VARM, we are pushing insulation forward. We help our customers save up to 50% on their heating costs and decrease their CO₂ emissions. To scale insulation, we just closed a strong Seed Round with top-tier investors. Join our mission now to change an entire industry for good.
Becoming Europe’s insulation champion and insulate 1 million houses over the next 10 years! Now is your chance to be part of our vision. Join us in building a market-leading company in the climate sector. Unf*ck the planet with us and actively contribute to slashing CO₂ emissions from buildings.
Job Summary
We are a technology company at heart, building the systems to run insulation operations at scale. From the first customer touchpoint to on-site installation, we own and operate the entire process. The software is not just helping the business. It is designed to run it by making decisions at scale, increasingly autonomously. You will own systems end-to-end, from idea to production to real-world impact, not just ship features.
Key Responsibilities
- You will build a context-aware AI system across the full project lifecycle, built on the knowledge and memory of thousands of past projects. It helps teams make better decisions before execution and augments them during installation, evolving into a system that runs largely on its own at scale.
- You will build the app used by installers on-site. It needs to work reliably in rural areas with poor connectivity, sync seamlessly when back online, and support everything from job execution to documentation and customer handoff. The goal is that installers focus on installation, augmented by AI, while coordination and business processes are handled in the background.
- You will work on our internal operations platform where scheduling and planning come together. It is designed to coordinate hundreds of teams and projects in parallel and give operations full visibility into execution. You will help evolve it into a system that teams rely on daily and that increasingly runs autonomously, with humans in the loop.
Requirements / Qualifications
- You have around 5-7 years of experience and have shipped real products in early-stage environments, not just prototypes
- You are curious about AI systems and have worked with LLM APIs, vector databases, RAG, or similar tools, and understand how to design and integrate them into production systems
- You are strong across the stack, including TypeScript, modern frontend frameworks, backend systems, and SQL
- You design reliable systems and are comfortable working with APIs and data
- You take ownership from idea to production and do not wait for detailed specifications
- You are product-minded and care about impact, not just implementation, and understand that AI is blurring the lines between product, engineering, and operations
- You use AI to move faster, but still care about code quality, system design, and know when not to use an LLM
- You are comfortable with ambiguity and can turn unclear problems into working solutions
Preferred Qualifications
- Experience in operations-heavy environments such as field services, construction or logistics
Location
Berlin, Germany, Remote: False
Employment Type
Full Time
Salary & Benefits
- You build real systems that are used daily and directly impact operations and revenue
- You work across the entire business and see how everything connects
- High ownership in a small team with room to grow quickly
- No product layer. You work directly with operations, sales, and leadership
- Close collaboration with business teams and real-world execution
- AI is part of how you build every day, not a side project
- Modern stack with TypeScript, Supabase, Cloudflare, and AI tooling
- Full transparency on metrics and business performance
- Meaningful equity. Early team with real upside
- Direct climate impact by scaling insulation to 1,000,000 homes across Europe
