Egor Rybakov Email & Phone Number

Belgrade, Rs

United States

- Developing new microservices in a document management system using Java 11-17, GraphQL,Spring Boot, Spring Security, Spring Data JPA, PostgreSQL, Kafka and Keycloak.- Conducted technical research, wrote design documents and tasks for other developers.- Designed and implemented an authentication and authorization system for a microservice usingOpenID Connect and Keycloak.

- Developed a real-time event processing system from scratch that integrates withcryptocurrency exchanges using Java 11, Concurrency, Spring Boot, Kafka, WebSocket, Docker, Kubernetes and AWS.- Built a highly configurable custom testing tool that allows emulating crypto exchangesand generating up to 500k messages per second for load testing.- Designed and implemented an asynchronous persistent client-side rate limiter usingBucket4j.- Conducted technical interviews with international candidates.

- Developed and maintained an automated loan processing microservice system usingJava 8-11, Spring Framework, Spring Boot, Oracle, PostgreSQL, Camunda, Kafka, Docker, Kubernetes and AWS.- Migrated the system from Oracle to Greenplum, rewriting most of the SQL scripts andadding custom implementations of MERGE/UPSERT operations.

- Worked on a system with complex domain logic that forecasts demand and manageswarehouse stocks.- Implemented a new algorithm of rounding an order by packages, which allowedcustomers to distribute their stock by different types of packaging and not lose money onleftovers.