Sergey Smirnov Email and Phone Number

Project Mail.ru- Enhanced user surveys (CSAT), increasing user satisfaction by 5%.- Developed new "Daily Bonus" functionality, improving user retention by 3%.

A decentralized private data storage solution using smart contracts and blockchain technology.Achievements: - Engineered a push notification service for mobile application, resulting in a 2x increase in DAU. - Wrote a replication module within the core codebase, improving network security and boosting node holders' profitability. - Increased the number of gathered metrics for the user statistics service, empowering our marketing team to achieve a 10% increase in CTR.

A service for collecting advertising statistics and information about advertising campaigns.- Moved frequently used libraries and code into separate modules, reducing the time required to write new services by 10%.- Implemented a linter template in the project and CI. This reduced time of code review.