Staff Software Engineer (on-site)

About the role

We're looking for a Staff Software Engineer to join our Berlin team: someone who helps set technical direction, raises the bar across the engineering org, and solves the problems that others escalate. You'll report to our CTO and operate across squads, shaping systems that reach thousands of installer partners directly.

What you'll do

• Set technical direction and lead complex, cross-functional initiatives end-to-end: architectural decisions across APIs, infrastructure, and data systems through to production and long-term ownership, bringing other engineers with you.
• Identify systemic weaknesses before they become incidents. Design systems that self-monitor, degrade gracefully, and recover fast. Establish the reliability practices that make that the norm across the team.
• Own and evolve our backend and frontend systems (Node.js, Next.js, React, TypeScript). Design APIs that are scalable, secure, and easy to build on.
• Model, optimise, and operate our PostgreSQL data layer: schema design, indexing, query optimisation, and migrations that ship safely.
• Architect and manage cloud infrastructure on Google Cloud Platform using Terraform, keeping environments consistent, auditable, and built for the scale we're heading toward.
• Mentor junior engineers. Develop technical leads, run architecture reviews, and shape how we hire and evaluate engineering talent.
• Collaborate daily with Product, Ops, Finance, and Design, translating ambiguous cross-functional problems into well-scoped, reliably shipped solutions.

What you'll need

• 10+ years of professional software engineering experience, operating as a Staff or Senior engineer — leading initiatives, not just executing them.
• Deep experience building high-stakes systems where reliability and correctness matter more than raw scale.
• Strong JavaScript and TypeScript across frontend and backend. Comfortable across the full stack and opinionated about quality.
• Cloud infrastructure depth, ideally on Google Cloud Platform, with hands-on Terraform or equivalent IaC practice at production scale.
• Strong relational database expertise: schema design, indexing, query optimisation, and performance tuning at scale.
• Proven experience building well-designed APIs that others can rely on and build on top of.
• Works without waiting to be directed. Takes cross-functional ownership. Moves fast and brings others with them.
• Based in Berlin and energized by being in the room. Fully proficient in English (C2).

Nice to have

• Deep knowledge of auth protocols: OAuth, OpenID Connect, SSO, session management.
• German language skills.

What they offer

• Strong base, bonus tied to outcomes, and meaningful equity.
• Unlimited enterprise-grade AI tooling across all roles.
• Prenzlauer Berg office with latest Apple hardware, free breakfast and dinner, stocked kitchen.
• 25 days vacation, Urban Sports Club (M), and company discounts.