5 hours ago
Hamburg, Germany +2 moreSenior
Responsibilities
- Build and maintain the Kotlin Agent SDK as an internal product, including its runtime and client-facing contracts.
- Design and ship the agent identity layer and authentication plumbing so agents can act with real user identities.
- Integrate telemetry, error reporting, inference, and anonymization into the SDK by default.
- Create the SDK test kit, architecture tests, and evaluation workflow for running agents against the ML team’s evaluation harness.
- Own Koog version upgrades, format compatibility, and shared limits for tool output and token usage.
- Set the SDK roadmap and absorb ecosystem changes for consuming engineering teams.
Requirements
- Several years of production backend experience on the JVM with Kotlin, Java, Scala, or a similar technology, plus readiness to work in Kotlin.
- Experience designing APIs and SDKs or internal platforms where the contract is a core product.
- Experience building and maintaining integrations through changes in external systems.
- A development approach that includes testing and observability.
- Interest in AI agent systems, orchestration, and evaluation.
Benefits
- Freelance role with flexible working hours and a flexible hybrid setup.
- Work remotely across Germany or from the Berlin office.
- Stock options.
- 30 vacation days plus a day off for your birthday.
- Germany Transport Ticket and Urban Sports Club membership.
- Regular company off-sites, team events, access to Blinkist and Audible, and free language courses.
About voize
voize builds a voice-powered AI assistant that lets nurses and caregivers document care at the bedside via smartphone, with integrations to existing care IT systems. It sells its software to care providers and focuses on reducing administrative workload and improving documentation quality; the company is YC-backed, founded in 2020, and headquartered in Berlin. The product is used in 600+ care facilities in German-speaking markets and is built to be GDPR-compliant.