Senior Java Developer (Backend)

TL;DR

Senior Java Developer (Backend): Designing and developing large-scale monolithic production systems with an accent on architectural stability, performance optimization, and complex integrations. Focus on managing technical debt, mentoring the team, and ensuring system reliability through rigorous testing and efficient Java Core implementation.

Location: Ukraine

What you will do

• Design and maintain complex monolithic applications using Spring Boot and Spring Framework.
• Implement secure authentication and authorization schemes including OAuth2, JWT, and SSO.
• Optimize database performance, including managing schemas, indexing, and complex transactions with Hibernate.
• Develop and support robust REST APIs while ensuring backward compatibility and proper versioning.
• Refactor technical debt and plan architectural improvements that provide clear business value.
• Provide technical leadership through code reviews and mentoring of junior developers.

Requirements

• 5+ years of commercial experience in Java development.
• Deep understanding of Java 17+, JVM internals, multithreading, and memory management.
• Strong expertise in Spring stack and ORM frameworks.
• Proven ability to support and develop large monolithic systems.
• Excellent knowledge of relational databases and database schema management via Liquibase.
• Higher technical education.