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Senior Research Engineer (Agentic Behavior) (m/f/d)

Berlin, BERLIN🌐 Remote💼 Full-time🗓 2026-07-07 → 2026-09-27

Core

Build evaluation infrastructure, error analysis tools, and post-training pipelines to measure and improve AI coding agents' behavior on Kotlin code.

Role type

Senior Research Engineer (Agentic Behavior)

Builds

Evaluation pipelines, observability tools, simulation environments, and open-source benchmarks for AI coding agents.

Domain

AI/ML, Software Development Tools, Kotlin Ecosystem

Required skills

Python engineering, LLM evaluation pipeline design, data analysis at scale, end-to-end project ownership, product-aware mindset, Kotlin familiarity

Preferred skills

Post-training techniques (SFT, DPO, GRPO), PyTorch, LLM training stacks, AI agent development, experiment tracking tools, Kotlin ecosystem depth, open-source contributions

Technologies

Python, SQL, Athena, PyTorch, TRL, verl, Megatron, Inspect AI, Promptfoo, LM-evaluation-harness, W&B, MLflow, Langfuse, Gradle, Spring, Ktor, Android, KMP

Responsibilities

Design and implement tooling to capture and analyze AI agent errors; Build observability pipelines over agentic traces; Design and maintain evaluation pipelines for code generation quality; Experiment with post-training techniques to improve model behavior; Build public open-source benchmarks for Kotlin tasks.

Seniority

Senior, hands-on IC

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