Before and after.

Social app blocked by Apple under Guideline 2.5.2 for dynamic JS execution. Extracted core logic, compiled to native Swift, shipped in 11 days.

BEFORE

• Dynamic code execution via embedded WebView
• Hallucinated npm dependency 'react-native-secure-vault'
• Hardcoded API keys in client bundle

AFTER

• Static Swift binary with zero dynamic execution
• Native Keychain integration for secrets
• Clean App Store approval on first resubmission

Fitness tracker MVP with O(n²) sync logic causing ANR crashes. Refactored to Room + WorkManager. Reduced battery drain by 62%.

BEFORE

• Nested loops in Bluetooth sync service
• Main-thread network requests
• Unbounded local cache growth

AFTER

• Background WorkManager sync with coroutines
• Bounded LRU cache with eviction policy
• Play Store approval with 4.8★ launch rating

Fintech prototype rejected three times for privacy violations. Stripped unauthorized telemetry, implemented ATT protocols, passed in 6 days.

BEFORE

• Undisclosed analytics to third-party LLM endpoints
• Missing App Tracking Transparency framework
• Insecure JWT storage in UserDefaults

AFTER

• Zero unauthorized telemetry
• Full ATT compliance with granular consent
• Keychain-secured token storage with biometric lock

Marketplace app with slopsquatting vulnerability in hallucinated 'stripe-react-hooks' package. Audited supply chain, replaced with official SDKs.

BEFORE

• Dependency on non-existent npm package
• Client-side payment processing
• No input validation on listing creation

AFTER

• Verified dependency tree with lockfile pinning
• Server-side Stripe integration with webhook verification
• SQL injection prevention via parameterized queries

Content app with architectural drift between AI-generated frontend and backend. Refactored API contracts, added deterministic state management.

BEFORE

• Inconsistent data models across 12 endpoints
• Race conditions in optimistic UI updates
• Missing offline state handling

AFTER

• Unified GraphQL schema with code generation
• Redux-style state machine with strict transitions
• Offline-first architecture with sync queue

Delivery app with memory leaks causing daily crashes. Implemented proper lifecycle management and leak-free architecture.

BEFORE

• Activity context leaked in static references
• Unregistered LocationListener causing GPS drain
• Bitmap allocations without recycling

AFTER

• Application-scoped DI with Hilt
• FusedLocationProvider with lifecycle-aware callbacks
• Glide image loading with automatic bitmap pooling