AI Research Engineer (Agentic Post-training) - 100% Remote Worldwide

Stack

Responsibilities

• ▹Conduct end-to-end research and engineering initiatives to advance post-training of agentic and tool-use models to achieve SOTA results
• ▹Drive broad model improvements, including factuality, instruction adherence, tool/function use, multi-agent coordination and reasoning calibration
• ▹Design and enhance large-scale post-training systems, including data pipelines, training workflows, evaluation frameworks and benchmark infrastructure
• ▹Develop rigorous evaluation suites and diagnostic tools to assess model readiness for deployment
• ▹Strengthen feedback loops from real-world product usage, incorporating explicit and implicit user signals into post-training
• ▹Collaborate with tooling, product and training teams to improve the usefulness, reliability and agentic capabilities of frontier models
• ▹Liaise closely with research, engineering and cross-functional teams to determine which integrations are production-ready for major model releases

Requirements

• ▹Degree in Computer Science, Machine Learning or a related field; advanced degree (MS/PhD) preferred with a strong publication record in top-tier AI conferences
• ▹Experience with multimodal post-training workflows and data pipelines, particularly for agentic systems and tool use
• ▹Hands-on experience applying post-training at scale using distributed training frameworks (e.g. multi-node GPU environments)
• ▹Demonstrated experience improving model capabilities in areas such as reasoning, tool use and multi-agent coordination that achieve SOTA results
• ▹Proven track record of open-source contributions related to agentic systems or tool use (code, datasets or models) on platforms such as GitHub or Hugging Face
• ▹Publications at leading AI conferences (e.g. NeurIPS, ICML, ICLR, ACL, CVPR, ECCV)

Soft skills

What we offer

• ▹100% remote, worldwide

About the company

Tether works in digital finance: it offers USDT, one of the world's most trusted stablecoins, along with asset tokenization services, energy solutions, AI and peer-to-peer technology (Tether Data, the KEET app) and education. The team works remotely from around the world.