Senior Java Backend Developer

Senior Java Backend Developer with 8+ years of experience in software development, with a strong background in banking, enterprise systems and system integration. Currently working at Sber, developing backend functionality for a banking system serving small and micro businesses. Experienced in building new modules from scratch, designing business logic and database structures, developing REST APIs, integrating services, refactoring complex systems and solving critical production issues. I have experience working both with modern Java/Spring backend systems and large existing enterprise platforms with complex business logic and technical debt. Core expertise includes Java 8–17+, Spring Boot, Backend & REST API development, PostgreSQL, Oracle, SQL, Apache Kafka, event-driven integrations, Hibernate, JPA, Spring Data, Microservices, Spring Cloud, Docker, Kubernetes, Performance optimization, refactoring, Integration development, Unit & integration testing, Code review & mentoring, Technical solution design. Key achievements include designing and developing an automatic loan acceptance module from scratch, optimizing a critical process from 46 seconds to 0.5 seconds, and reducing incoming database requests/errors from 70 to 7 through SQL and workflow optimization. Open to Senior Java Backend Developer opportunities, particularly in banking, fintech, retail and other commercial products where I can contribute to backend architecture, development and performance optimization.