• Higher technical education;
• Work experience: 5+ years of commercial experience in Java development;
• Experience in supporting and developing large monolithic production systems;
• Willingness to take responsibility for architectural and technical decisions within the monolith;
• Java 17+ — deep understanding of JVM, memory, GC, threads, profiling;
• Excellent knowledge of Java Core, collections, multithreading, streams;
• Experience in performance optimization and troubleshooting in long-running applications;
• Deep knowledge of relational databases;
• Understanding of HTTP, CORS, WebSockets.
Responsibilities:
• Spring Boot / Spring Framework — designing and developing monolithic applications;
• Spring Security — complex authentication and authorization schemes (OAuth2, JWT, SSO);
• Spring MVC — controllers, filters, interceptors, error handling;
• Spring Data JPA / Hibernate — deep understanding of ORM, entity lifecycle, N+1, batching, 2nd-level cache;
• Designing a modular monolith (package-by-feature, bounded contexts);
• Understanding and applying SOLID, DRY, KISS, design patterns;
• Separation of layers: controller / service / domain / persistence;
• Designing schemas, indexes, complex transactions;
• Optimization of heavy queries and batch operations;
• Redis — data caching, sessions, synchronization within a monolith;
• Development and support of REST API for external and internal systems;
• Working with synchronous integrations and asynchronous tasks within the application;
• Managing the database schema using Liquibase;
• Backward compatibility of changes;
• Supporting API versioning;
• Monolith testing architecture: unit / integration / e2e;
• Support for high coverage and stability of regression tests;
• DevOps Maven, Gitlab, basic understanding of CI/CD;
• Mentoring developers;
• Conducting code reviews;
• Working with technical debt;
• Ability to plan refactoring and explain its business value.