Full-Stack Engineer (Founding Team)

About the Role

This is a founding-team engineering position at a pre-seed AI-powered SaaS startup operating in the construction technology (ConTech) space. As one of the first engineers, you will own the product technically from day one — partnering directly with the founders to build a category-defining platform that automates project documentation, decision tracking, workflow management, and risk analysis for the construction industry.

You will have end-to-end ownership across the full stack, from data models and backend systems to intuitive, responsive user interfaces, with direct and visible impact on customer outcomes in a rapidly evolving market.

Important: German language proficiency is a hard requirement for this role.

What You'll Do

• Build customer-facing features spanning database design through beautiful, responsive frontends.
• Design robust, scalable systems capable of handling complex workflows and large, real-world datasets.
• Ship code fast — work in a high-velocity environment where ideas go from concept to production in days.
• Build sophisticated data workflows leveraging AI and vector data capabilities.
• Collaborate closely with founders to shape product direction and key technical decisions.

What We're Looking For

Required skills & experience:

• Fluent German speaker (hard requirement).
• Strong proficiency in TypeScript and Next.js for full-stack development.
• Hands-on experience with PostgreSQL and Supabase, including vector data.
• Familiarity with LangChain, TanStack Query, and shadcn UI for building UIs and data workflows.
• A track record of stable tenure — preferably roles lasting 12+ months (internships excluded).
• Strong computer science fundamentals; a university degree is valued but not required.

Nice to have:

• Prior experience in a startup environment, shipping features rapidly.
• Experience in or knowledge of the construction or project management industry.
• Ability to take full end-to-end ownership from database to UI with a direct eye on customer impact.
• Collaborative, founder-ready mindset — comfortable contributing to product and strategic decisions.

Location & Work Arrangement

This role is based in Munich, Germany and follows a hybrid working model. You are expected to be in the office at least three days per week, with flexibility to work remotely for a few weeks at a time.

Visa sponsorship is not available for this position.

Compensation & Benefits

• Salary: €70,000 – €90,000 per year, depending on experience.
• Early-stage equity opportunity as a founding team member.
• High autonomy and direct influence over product and technical direction.
• Work on a genuinely novel problem at the intersection of AI and construction technology.