Reach VR
Senior Full-Stack Engineer — Backend, Rust/WASM Optimization & AWS Infrastructure
Overview
Engineered cloud infrastructure, backend services, and kinematic calculation pipelines for a virtual reality rehabilitation platform (Meta Quest Store) aiding frozen shoulder recovery. Patients perform guided therapeutic exercises in VR while clinicians monitor progress and range-of-motion metrics via an analytical web dashboard.
Architecture
Node.js/Express backend backed by MySQL for storing clinical telemetry and patient sessions. Heavy forward kinematics and reachable workspace grid calculations were compiled to Rust/WASM and executed across Worker thread pools to prevent blocking the event loop. Automated AWS cloud deployment managed through Jenkins CI/CD pipelines.
Technical Challenges
Optimizing anatomical joint constraint calculations: the original JavaScript implementation blocked execution for ~90 seconds; re-architecting the engine in compiled Rust/WASM with multi-threaded Workers slashed processing time to ~400ms (>220x speedup), preventing event loop starvation. Additionally, ensuring rigorous biometric validation for clinical reporting.
Outcome
Delivered high-availability telemetry and cloud infrastructure on AWS, enabling physical therapists to remotely evaluate patient mobility with verified clinical data.