John Abrahams

I'm a master's student in Data Science at Penn, graduating in December 2026. I build Kronos, a cloud for small software, live at kronoslabs.dev. This summer I was a software engineer intern at Ninth Wave, an open-finance fintech. I'm currently researching language models and world models.

Selected work

• Kronos: a Type II Exovisor
  A cloud for small software: deploy a Python or JavaScript program and share a link anyone can run. Live at kronoslabs.dev.
• Reasoning and Memory in Language Models
  Grafting a recurrent reasoning module into frozen language models, and working out when a deployed model should learn a fact in its weights or just look it up.
• Crowd-Aware Music Recommender
  Sensors track how a room's crowd moves; a GRU picks the next song and a reinforcement learning head adjusts to the crowd. With Chris Spletzer.

Papers

• Kronos: Instantiation-Time Capability Gating for Multi-Tenant WebAssembly (2026, with Ajax Li)
• Predictive Outcome Modeling After ACDF (LDR-C ROI Implant) (2024, co-author, 236-patient cohort study)