Senior Software Engineer (Token Factory)

The role is for Nebius AI R&D, a team focused on applied research and the development of AI-heavy products. We publish applied research on test-time guided search and scaling data collection for reinforcement learning. One project is Nebius Token Factory — an inference and fine-tuning platform for AI models. The role requires expertise in distributed systems to build a large-scale LLM training platform. Your responsibilities include: Designing and developing the LLM training platform; Maintaining ML infrastructure for performance, scalability, reliability; Improving job scheduling to minimize resource fragmentation. Requirements include 5+ years of professional software development experience; Proficiency in Python and Go; CI/CD, version control, unit testing; Web services; A commitment to rigor. Nice to have: experience with language models or NLP; building products in a startup-like environment; distributed systems or high-load web services; open-source projects. Benefits & Perks: Competitive compensation; Career growth; Flexibility and ownership; Collaborative culture; Opportunity to work on impactful AI projects; International environment. Nebius values: Fast moving, Bold thinking, Constant growth, Meaningful impact, Trust and ownership. Equal Opportunity Statement included. Applications require work authorization in the country of the role.

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