Requirements

Several years of experience (typically 3 to 6) building and operating backend systems under real load.
Strong proficiency in TypeScript and Node.js.
Comfortable working with Kubernetes, Terraform, networking, databases, and queues.
Experience with Go is useful; willingness to work in Go matters more.
Strong platform design judgment with the ability to define stable service boundaries and APIs.
Ability to handle data integrity, tenant isolation, backward compatibility, partial failure, and safe rollout considerations.
Capable of independently investigating unfamiliar systems problems and designing solutions.
Ownership mindset: deployment is the start of ownership including observability, incident response, and improvements.
Effective use of AI tools to enhance productivity while maintaining responsibility for architecture and changes.
Good communication: shares context, asks for input, disagrees respectfully, and helps others succeed.
Existing right to work in Germany (no visa sponsorship).

What you'll be doing

Owning shared platform capabilities as internal products with defined interfaces and accountability for reliability and evolution.
Turning complex capabilities like model access, agent execution, authorization, queues, integrations, document processing, and sandboxed compute into stable, reusable building blocks.
Designing APIs and failure behaviors, planning migrations, implementing, deploying, making services observable, and operating them in production.
Working with Systems Engineers when new underlying mechanisms are needed, managing service boundaries and lifecycle.
Possibly working on durable agent runtime, model gateway, shared services with explicit contracts, integration and tool platforms, code execution services, and production confidence systems.
Starting in one platform area based on experience and team priorities, then owning its interface and production operation.

Competitive salary range of €135,000–€200,000 gross per year plus equity.
In-office role in Berlin fostering trust, shared context, and quick decision-making.
Typical work start around 8:30 AM, with communal lunch and optional dinner for late workers.
Encouragement of a healthy lifestyle including running and gym participation.