DeepSeek hires ex-Jane Street engineer to boost AI agent development
DeepSeek, the Hangzhou-based AI startup, has recruited former Jane Street engineer Cui Tianyi to accelerate its development of AI harnesses—software that transforms AI models into autonomous agents. Cui joined in March after four years at TSY Capital, a Hong Kong quantitative trading firm he co-founded in 2022. He previously spent nearly nine years at Jane Street in Hong Kong, working on equities and fixed income. The hire underscores DeepSeek's push to catch up in the competitive AI agent market, where revenue generation is a key focus. The importance of AI harnesses has grown since the source code of Anthropic's Claude Code leaked in late March, highlighting the critical role of such infrastructure.
Key facts
- DeepSeek recruits former Jane Street engineer Cui Tianyi.
- Cui joined DeepSeek in March 2025.
- He spent nearly nine years at Jane Street in Hong Kong.
- He co-founded TSY Capital in 2022 and worked there for four years.
- Cui's role is to develop AI harnesses for autonomous agents.
- AI harnesses turn AI models into functional agents.
- Claude Code's source code leaked in late March 2025.
- DeepSeek aims to catch up in AI agents and revenue race.
Entities
Institutions
- DeepSeek
- Jane Street
- TSY Capital
- Anthropic
Locations
- Hangzhou
- China
- Hong Kong