Job description
Staff Software Engineer
Company Overview
At Cloover, we're building the AI operating system for the energy transition — a platform that helps thousands of installation companies across Germany and Austria sell more, plan faster, and deliver better. We've secured $1.22B in total financing — including $1.2B in committed debt financing and a $22M Series A — and are just getting started on our European expansion. We're a high-performance team that works with purpose.
Job Summary
Most energy companies are still running on spreadsheets and phone calls. At Cloover we're building the infrastructure that replaces all of that, and we need engineers who don't just own features but shape the systems beneath them. 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.
Key Responsibilities
- 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.
- Integrate and harden authentication and authorisation flows on Auth0 (OAuth, SSO, session and token management) across the platform, balancing security with a frictionless user experience.
- Champion AI tooling across the engineering team: not just using it yourself, but defining how we build with it. Push the boundaries of what our AI operating system can do.
- 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.
Requirements / Qualifications
- 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.
- 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.
- Works without waiting to be directed.
- Based in Berlin and energized by being in the room. We're intentionally office-first.
- Fully proficient in English (C2).
Preferred Qualifications
- Deep knowledge of auth protocols: OAuth, OpenID Connect, SSO, session management.
- German language skills.
Salary & Benefits
- Performance pay: Strong base, bonus tied to outcomes, and meaningful equity.
- Unlimited enterprise-grade AI tools.
- Prenzlauer Berg office with the latest Apple hardware.
- Free breakfast and dinner, stocked kitchen, regular team events.
- 25 days vacation.
- Urban Sports Club (M).
- Company discounts.
Hiring Process
- Intro call (30 min).
- Hiring manager interview (45 min).
- Case study (1 hour).
- Offer & signed contract.
Equal Opportunity Statement
We believe the energy transition belongs to everyone — and so does our team. We're international, driven, and deliberately inclusive. We hire for potential and perspective, and we welcome people of all backgrounds, identities, and experiences.
