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Kamal Musaev

@kamalmusaev

Java backend engineer building a four-service dating platform with Kafka-driven communication and concurrency-safe matching.

Russian Federation

Message

I designed and developed a four-service dating platform backend with Java 21 and Spring Boot. It uses REST and gRPC APIs, Kafka event-driven communication, and the Transactional Outbox pattern.

I addressed a race condition in concurrent mutual-like processing with PostgreSQL constraints and idempotent conflict handling, then verified the behavior with integration and concurrency tests. At Kirgu, I developed inventory and employee performance reports, optimized database queries, and supported production software.

Experience

Work history, roles, and key accomplishments

Current

Independent Backend Developer

Current

Dating Platform

Jun 2026 - Present (4 months)

Designed and developed a 4-service distributed backend using Java 21 and Spring Boot, including core, matching, notification and API gateway services. Implemented event-driven communication with Apache Kafka and transactional consistency using the Transactional Outbox pattern.

Java Spring Boot PostgreSQL Kafka Redis gRPC REST APIs Microservices Transactional Outboxes Idempotent Processing Test Containers Awaitility Spring Security JWT Resilience4j Docker GitHub Actions

Mathematics & Computer Science Tutor

Self-employed

Aug 2025 - Jun 2026 (10 months)

Taught mathematics and computer science to students in grades 8–10. Adapted complex technical concepts to different levels of prior knowledge and helped students prepare for state examinations.

Teaching Mathematics Computer Science

Software Developer Intern

Kirgu

Feb 2025 - Jul 2025 (5 months)

Developed reports for analyzing warehouse and store inventory levels and employee performance. Optimized existing modules and database queries and resolved bottlenecks in data exchange algorithms with external systems.

SQL Database Optimization Reporting Debugging Production Support