AI Researcher Building something new in stealth mode (AI + Mental Health)

Previously Led Brazil’s largest digital health platforms (Zenklub/Conexa)

Philosophy Make it simple, but significant

one .nest file carries chunks, embeddings, source spans, hnsw and bm25 indices, and a search contract. hash-verified, mmap'd, reproducible, offline.

python builds. rust serves. nest ships. agents/llms read, that's it.

own binary format in nest-format. mmap runtime with avx2/neon dispatch. hnsw and bm25 as candidate generators, exact cosine rerank always. int4 storage in dtype.rs, fsst text compression in fsst_table.rs.

hoff research is my org for ai + mental health.

brennercruvinel/plev. an experimental gpu-first compositing engine in rust. one codebase, one pixel-identical frame on every target: macos on metal, the browser on webgpu, ios on metal, android on vulkan.

a scene is rebuilt every frame, the compositor resolves only the layers that changed. no change, no frame. glass, backdrop blur, analytic shadows, real text shaping, hidpi at native scale.

started six years ago as the engine for a children's education app for my daughter, one hundred percent rust. today it also ships the nest explorer gui (crates/nestui). the children's app is next.

cryptocontrol v2 of a crypto portfolio manager for professional investors in latam. took over a weak mvp, shipped analytics and trading tools on top of it.

flashed study app for gen z, adapts content to how each student learns (video, image, diagram, quiz). i was cpo and did the design system and all the ui. bernardo rodrigues built and published it. the store listings came down in 2026.

alexa skill, porto seguro "reppara! casa" ask alexa for a plumber or an electrician through your home insurance. i ran the voice squad (vux designers, ux writers, pds) for the largest insurer in latam. on the alexa store.

alexa skill, zenklub guided meditation, anxiety tools, booking a therapist by voice. my concept, i led the team. on the alexa store.

clari, zenklub assistant started it from zero. matches patients to therapists by behavioral profile, flags severe cases for immediate care. later got nutrition (photo analysis), emotional support and cbt exercises. wired into every zenklub service.

hash design system 70+ components, wcag 2.1 aa, documented in figma, implemented in next.js. i built it and led the front-end on the handoff.