● Solo-designed and built a native iOS surf-forecast app (waves, wind, precipitation, tides) released on App Store in May 2026. ● Architected in Swift/SwiftUI (MVVM, Combine, async/await) integrating marine and weather data from multiple APIs. ● Built disk cache, request coalescing, and background refresh reducing unnecessary network requests. ● Added home widget and lock-screen widgets using WidgetKit and Swift Charts. ● Integrated Firebase (Analytics, Crashlytics, Performance, Remote Config, App Check) for observability.

● Real-time mobile poker application with in-app monetary transactions; designed a layered networking architecture. ● Built a typed networking client from scratch with structured error handling, request idempotency, and safe logging. ● Diagnosed and fixed critical race conditions in concurrent, multi-session real-time flows. ● Improved app performance by >10x (SwiftUI rendering) via XCode diagnostics and removing view re-drawing events. ● Maintained 0% app crash rate throughout the entire production lifetime. ● Implemented client-side connection-quality monitoring and reconnection system. ● Maintained CI/CD pipelines (Fastlane, GitHub Actions); contributed 900+ commits over 2.5 years. ● Worked extensively with Auth0, Starscream, SwiftGen, Firebase Analytics, gRPC, and JWT.

● Developed a native iOS location-based social app for discovering, posting, and interacting with places on an interactive map. ● Implemented personalized feed, user profiles, activity notifications, and interactive map features. ● Implemented Figma design covering all social app features: camera upload, news feed, authorization, onboarding, user profile, and settings.

● Worked on PlanetVPN app as Senior iOS Developer (DAU up to 1,500,000 users). ● Reduced crash rate to 0% by diagnosing issues via third-party analytics, Xcode Instruments, and crash reports. ● Researched and rebuilt the networking framework and integrated it into the project. ● Upgraded UI of multiple screens according to design and refactored legacy code for better modularity. ● Integrated advertising and marketing features via Appodeal and AppsFlyer.

● Led a team of 5 iOS engineers developing a poker game app for the Brazilian market. ● Improved team performance by adopting agile practices and planning weekly releases. ● Triaged backlog; groomed features, refined requirements, and kept the team focused on priorities. ● Improved project code health by establishing better code review practices. ● Migrated the app from UIKit to SwiftUI, reducing feature implementation time. ● Redesigned the MVVM app architecture to align with SOLID principles for better modularity. ● Implemented unit testing practices for critical classes to improve app stability.

● Implemented new features with pixel-perfect UI following Apple's design guidelines. ● Started code migration to SwiftUI, learning new APIs and best practices. ● Created a project logic scheme to help onboard new team members and visualize data flow.

● LNER App: designed and implemented an internal iOS application for employees to report and evaluate safety incidents. ● ForensiDoc (Medical App): redesigned a hospital application, migrated from Swift 2.3 to Swift 5, reduced technical debt. ● Added secure patient photo capture to ForensiDoc, improving usability and maintainability.

● Sole creator of a production iOS tide forecast app rated 4.8★ with ~1,000 MAU and recurring revenue. ● Designed full architecture: hybrid SwiftUI/UIKit app with async/await networking layer and cache-then-network strategy. ● Integrated Firebase (Realtime Database, Remote Config, App Check) and Amplitude analytics. ● Implemented in-app purchases and subscriptions (StoreKit / RevenueCat) with Remote Config–driven paywalls. ● Built WidgetKit widgets, Apple Watch companion app (WatchKit) with WatchConnectivity, and HealthKit integration. ● Set up multi-language localization (SwiftGen) and owned full dev cycle: architecture, code review, and product optimization.