Team
Built by a small, focused team.
Two founders, one problem: turning serial clinical data into decisions that arrive ahead of time.
Aarchi Singh Thakur
Co-founder & CEO
Leads Span's vision and the partnerships that turn serial data into clinical decisions.
- First author, Seeing below the limit of detection — the CP-BLG methods paper, arXiv:2606.11876
- Co-author, OncoTraj v1, arXiv:2606.11144
- LinkedIn · [email protected]
Abhijoy Sarkar
Co-founder & CTO
Builds the trajectory model, and OncoTraj, the open benchmark it is measured on.
- First author, OncoTraj: a public benchmark for longitudinal resistance prediction in EGFR-mutant NSCLC, arXiv:2606.11144
- Co-author, Seeing below the limit of detection, arXiv:2606.11876
- Maintains span-detector and oncotraj — both open, both runnable
Both preprints are founder-authored and neither has been peer reviewed. What can be checked instead is open: the detector, the benchmark, the frozen splits and the evaluation reports every number on the research page is drawn from.
Join us
We're early, and hiring the people who define what Span becomes.
If longitudinal models of disease are the problem you want to spend years on, we'd like to hear from you.