At HEADHUNTER GROUP, I worked on a communication platform supporting high-volume email and push delivery. I redesigned an SMS service to support multiple providers and protocols, and the architecture was later reused to integrate four more providers.
I also implemented Kafka-based audience processing and helped replace pre-calculated recipient lists with on-demand asynchronous calculations. I unified storage and APIs for email, push, SMS, and web notifications while preserving backward compatibility.
At SBERBANK, I worked on Pokupai.ru, introducing a versioned backend API with database-level pagination. Earlier, as a Release Manager, I coordinated software releases and built a Java tool that automated daily release-status reporting.
