 Dima Bronnikov Email & Phone Number

Helsinki, Fi

Helsinki, Fi

Helsinki, Uusimaa, Finland

• Rewrote a cross-platform MVP app made in React Native using a modern native tech stack, improving performance by an average of 17%.• Replaced core encryption logic from an in-house implementation to the Signal Protocol, eliminating all major security vulnerabilities.• Expanded the iOS team from 2 to 5 members and transitioned the development process from a waterfall model to Scrum sprints.Technologies: SwiftUI/UIKit, Swift concurrency, Combine, MVVM, Coordinators, SQLite, GRDB

St Petersburg, St Petersburg City, Russia

• Worked on the messenger team, implementing a folders feature that was adopted by 34.7% of users within two months since the release.• Added reactions feature to the app, discovered performance issues with an outdated Lottie library and replaced it with a modern implementation, increasing the maximum number of animations that could be run simultaneously on the screen from 3 to 7.• Analyzed network performance issues and service disruptions under slow network conditions. Optimized data models to reduce network load by approximately 30%. Collaborated with the Automation QA team to implement an automated analysis system to prevent future occurrences of these issues.Technologies: UIKit, Swift, Objective-C, MVVM, SQLite

Saint Petersburg, St Petersburg City, Russia

Technologies: UIKit, Swift, Objective-C, MVC, MVVM, Coordinators, Alamofire, Realm, SQLite

Omsk

Technologies: UIKit, Swift, Objective-C, MVC, MVVM, Coordinators, Alamofire, Realm, SQLite