Published on Google Play Store// 2026• mobile
SecuChat
End-to-End Encrypted Cross-Platform Messenger
Cross-platform private messaging application published live on the Google Play Store (developer profile: Smiling Developer, package: com.developerik.secuchat). Implements ECDH asymmetric key exchange where private keys strictly never leave user devices.
// Google Play Production Screenshots • ECDH Encrypted Interface
OPINIONATED ARCHITECTURAL DECISION
Kept private keys strictly on-device with ECDH asymmetric key exchange rather than relying on server-mediated encryption keys.
WHAT I GOT WRONG & LESSONS LEARNED
Initial message sync architecture used polling Firestore snapshots, which created duplicate stream events and battery drain before migrating to clean BLoC stream subscriptions with local cache deduplication.
How I built this & what it delivers
Published live on Google Play Store under developer profile Smiling Developer (package: com.developerik.secuchat).
Implemented ECDH asymmetric encryption for end-to-end encryption of all chat sessions with keys generated and stored only on-device.
Architected using Flutter and the BLoC pattern for predictable state management across Android, iOS, Web, and Desktop.
Used Firebase Cloud Firestore for real-time message streaming with local caching redundancy.
Engineered custom FCM notification triggers that preserve message payload privacy.
// TECH ARSENAL
FlutterDartBLoCFirebaseCloud FirestoreECDH EncryptionFCMCI/CD
// PERFORMANCE & IMPACT
Google Play Live • ECDH On-Device Keys • BLoC Architecture
Audited for production reliability, memory efficiency, and execution safety.