Tianyi Cui

About

I'd love to connect with members of international frontier LLM labs. Please reach out! Twitter is open for DMs: @tianyi Opinions are my own.

Experience

• Member of Technical Staff, Harness Team at DeepSeek AI
  Mar 2026 - Present · 5 mos

• Co-Founder at TSY Capital
  Jun 2022 - Feb 2026 · 3 yrs 9 mos

• Jane Street (8 yrs 11 mos)
  • Quantitative Researcher, Equities
    Mar 2021 - May 2022 · 1 yr 3 mos

  • Software Developer, Equities
    Jul 2017 - Mar 2021 · 3 yrs 9 mos

  • Software Developer, Fixed Income
    Jan 2016 - Jul 2017 · 1 yr 7 mos

• Student at Zhejiang University
  Feb 2008 - Jun 2013 · 5 yrs 5 mos

• Software Developer Intern at Jane Street
  Jan 2013 - Mar 2013 · 3 mos