Mohamed Abouassi

Android POS + Flutter Wallet POS architecture: authored HLD and built a 15-module Gradle architecture (10 core + 4 feature + app) in Kotlin/Compose; security: TLS 1.3 certificate pinning, SQLCipher AES-256, audit logging (9 event types); Dual-channel payment reliability using FCM and coroutine polling with atomic state locks; update strategy with Shorebird OTA and remote config AB testing; leadership: conducted 30+ technical interviews, hired 4 engineers; achieved 99.6% crash-free Melos monorepo; reduced fraud by 18%; reduced release cycles from 4 hours to 15 minutes.

Monorepo Melos 2-app with 10+ shared packages; offline-first drift data layer; Riverpod lifecycle; on-device PDF rendering RTL Arabic; batch image gallery; 3-flavor environments; golden tests; lint rules; Mocktail unit tests; lc ov coverage; open-source contributions.

Architected Zero-T rust Android SDK with Ktor + OkHttp, isolated DI (Koin), MVI; 3-tier security (certificate pinning, root detection, anti-tapjacking); Biometric auth via Android Keystore; Idempotent retries with backoff; PII-redacted crash context logging; Facade pattern unifying services; Migrated monolith to DDD Melos monorepo; Reduced rework by 15%; 99.9% reliability across $5M+ transactions for 384K wallets; NFC HCE support; Server-driven UI; QR scanning; Firebase Remote Config and A/B testing; Release automation with Codemagic; multi-flavor releases.