Dima

Led architecture, sprint planning, hiring, and weekly 1:1s for a 10-person cross-functional team across mobile, backend, and QA. Built and guided a React Native enterprise MDM client integrating Android Device Admin and iOS MDM profile enforcement to apply device policies (lock, compliance checks, fleet management). Developed an admin panel to push policies at fleet scale and reduced rollout time from ~3 days to under 24 hours. Implemented significant performance improvements using code review and an AD R practice, cutting average PR-to-merge time from ~3 days to under 24 hours. Built native modules in Kotlin and Swift to integrate with device management functionality, and established secure device/app management workflows.

Built from scratch a secure Active Sync sync client in pure TypeScript, including a custom WBXML encoder/decoder against MS-A SWBXML specs (no usable NPM package available). Powered on-device synchronization for corporate email, calendar, contacts, and tasks. Designed a DRM-backed secure document viewer: DRM decryption stays in memory, screenshots are blocked, per-session watermarks are rendered, and keys reside in hardware-backed keystore via native iOS/Android modules. Added end-to-end encryption and biometric authentication (Touch ID / Face ID / biometric prompts). Led the mobile team from kickoff to MVP in ~6 months and continued through follow-up releases alongside backend and security.

Stabilized a React Native business lounge app (500K+ MAU) by profiling JS and native memory and fixing crashes via Crashlytics; improved crash-free sessions from 96% to 99.6% over ~3 months. Reduced cold start by ~30% (Hermes tuning, lazy bundle loading) and shipped an offline-capable QR access flow used at entry. Led development of a new React Native app for construction materials e-commerce, covering architecture, faceted product search, and end-to-end App Store/Play Store release within ~3 months.