How the systems were actually built.
Three deep-dives. Each one runs the same framework: the customer constraint, the architectural decisions and their trade-offs, what shipped, and what I'd revisit. Written for recruiters who scan and engineers who'll inherit something like it.
Remlo — Multi-Chain Payroll & Agent Payment Protocol
Cross-border stablecoin payroll where the protocol executes but never custodies. Live on Tempo Moderato + Solana devnet, with ERC-8004 + SAS reputation, three-chain x402/MPP agent payment, and policy-gated server wallets.
Shipped 7 Tempo contracts + 1 Anchor escrow program. Permissionless settlement holds under a fully compromised server. Built for the Colosseum Frontier hackathon.
LocalRx — Offline Medical Reference Engine
Healthcare workers in low-connectivity clinics need a deterministic medical reference that runs on one machine, returns ranked diagnoses + treatment protocols in under a second, and never phones home. Built for the VectorAI DB Build Challenge.
70-record corpus across 4 collections, ~12ms query time, hybrid BM25 + semantic retrieval fused via RRF inside Actian VectorAI DB. Docker compose up — zero config.
SmartRoom — ESP32 IoT with Dual Control Plane
Course brief: replace Blynk with a custom IoT dashboard for an ESP32 room automation system. Stretch goal: add Alexa voice control. Hard constraint: no backend, no database, two-week deadline.
ESP32 running two concurrent MQTT clients — HiveMQ for web, Sinric Pro for Alexa — with bidirectional state sync. Browser dashboard in Next.js with dynamic-import MQTT client over WebSocket TLS.