Senior / Lead Research Scientist, Models - Serbia

The role

This person will conduct full-stack research including framing questions, running experiments, writing papers, and shipping results. The work focuses on foundation models, evaluation, and frontier topics like multimodal models and agents.

What you will do

• Frame research questions
• Run experiments
• Write papers
• Ship results

Required qualifications

• Professional fluency in English (written and spoken)

Nice to have

• Foundation models: training, new architectures, RL, reward modeling, scaling
• Evaluation: benchmarks, eval loops, quality measurement, LLM-as-judge, failure analysis
• Frontier topics: multimodal models, agents, tool use, test-time compute, world models
• Published research at ICML, ICLR, NeurIPS, EMNLP, ACL, or AAAI
• PhD in ML/NLP — or equivalent practical experience you can point to
• Public work: non-trivial AI side projects, interdisciplinary experiments, open-source contributions

About the company

Inworld is a research lab and inference provider focused on realtime AI for consumer-facing applications. They build first-party speech models, serve LLMs, and run the inference behind modular APIs.