Research Engineer (Reinforcement Learning)

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Research Engineer (Reinforcement Learning) based in Romania. Join a small, senior engineering team building the next generation of voice- and text-driven AI agents. You’ll focus on post-training models to make agents more capable, reliable, and effective over long-running interactions. Your work will span environments, verifiers, synthetic data, training experiments, evaluations, and production deployment. You’ll tackle challenging problems such as persistent context, reliable tool use, and multi-turn agent behavior. The role combines hands-on research and engineering, with a strong emphasis on measurable improvements in model performance. You’ll work closely with experienced engineers in a remote, collaborative environment where technical craft and creativity are highly valued. Your contributions will directly shape AI systems operating at significant production scale.