- Build and maintain the Kotlin Agent SDK as an internal product
- Shape the SDK runtime and client-facing contracts
- Help define the SDK roadmap
- Build the identity layer and authentication plumbing for agents
- Integrate telemetry, error reporting, inference, and anonymization into the SDK
- Create the SDK test kit and architecture tests
- Build integration with the ML team's evaluation harness before model changes ship
- Own Koog version upgrades and format compatibility
- Define shared limits for tool output and token usage
- Support consuming engineering teams by absorbing ecosystem changes
Requirements
- Several years building production backend systems in Kotlin, including systems consumed by other engineers
- Experience building an SDK or internal platform where the published contract is the product
- Experience with versioning work associated with consumed SDKs or platforms
- Experience setting up testing and observability tooling
- Interest and familiarity with AI agent systems, orchestration, and evaluation
- Clear communication in English
- Proficiency in Kotlin and Coroutines
- Excellent fluency in English
- Legal right to work in Germany
- Based in Berlin, willing to relocate to Berlin, or seeking remote work within Germany
- Remote work within Germany requires travel to Berlin every 3 months for work-weeks
Core Competencies
Demonstrates expertise in building and maintaining SDKs, particularly in Kotlin, with a focus on backend systems and integration of observability tooling. Proficient in defining product contracts and managing versioning for internal platforms.
Highest-signal resume keywords
- Kotlin Development
- SDK Development
- Versioning Management
- Testing and Observability Tooling
- AI Agent Systems Familiarity
Hard Skills
- Kotlin
- Coroutines
- Backend Systems Development
- SDK Architecture
- Integration Testing
- Telemetry Integration
- Error Reporting
- Anonymization Techniques
- Version Control
- Contract Definition
Soft Skills
- Clear Communication
Industry Keywords
- AI Agent Systems
- Orchestration
- Evaluation Harness
- Ecosystem Changes
- Remote Work
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Senior Backend Engineer – Kotlin in Berlin Arbeitgeber: Jobtailor
Als Front Office Supervisor in unserem dynamischen Team bieten wir Ihnen die Möglichkeit, in einem unterstützenden und freundlichen Arbeitsumfeld zu wachsen. Wir legen großen Wert auf die berufliche Entwicklung unserer Mitarbeiter und bieten regelmäßige Schulungen sowie die Chance, Verantwortung zu übernehmen. Unsere Lage ermöglicht es Ihnen, Teil einer lebendigen Gemeinschaft zu sein, während Sie gleichzeitig die Standards unseres Franchise-Partners einhalten und unseren Gästen einen unvergesslichen Aufenthalt bieten.
