jon allen

based in boston. cs + math (minor) student. interested in ml and the web.

projects

inia-package foundation models
unified python package around meta's SAM 3 and MedSAM 3 for spleen ultrasound segmentation. LoRA fine-tuning + UNet++ prompt generation raised mean Dice from 0.62 → 0.97.
c-grad systems
scalar-valued autograd engine in C with a dynamic compute graph, topological-sort backprop, and a custom arena allocator. MLP module on top trains on real datasets.
chess-engine ~1600 elo
python chess engine and lichess bot. iterative-deepening minimax w/ alpha-beta, quiescence, TT, null-move, LMR. phase-blended PSQT eval + MVV-LVA, killers, history. UCI driver + live stats dashboard.
entocellular-segmentation research practicum
fine-tuned Cellpose (cyto3 + SAM) on phase-contrast microscopy for cell segmentation. AP@0.5: 0.523→0.624 (cyto3), 0.515→0.688 (SAM). built an annotation tool with model-assisted pre-labeling.
bestella-web-design founder
web design studio shipping fast, SEO-optimized static sites in eleventy on netlify. 90+ pagespeed; one client went from 0 to 12+ inbound contacts/month post-launch.