Senior Java Developer Needed for JVM Performance Tuning Initiative

CoreData Systems

Freelance · Remote · Flexible hours

About the role

CoreData Systems is extending a multi‑tenant B2B product with new feature sets. We need a Java Developer to design, implement, and test tenant‑isolated services that will roll out next quarter. The work is contract‑based, fully remote, and requires close collaboration with product owners and QA.

Key responsibilities

• Architect and develop multi‑tenant microservices using Java and Spring Boot
• Implement tenant‑level data segregation and configuration handling
• Write unit and integration tests to ensure reliability across tenants
• Participate in code reviews and contribute to CI/CD pipelines
• Document APIs and service contracts for internal consumption

Must-have skills

• Strong Java development experience (5+ years)
• Proficiency with Spring Boot and building microservices
• Understanding of multi‑tenant architecture patterns

Nice to have

• Experience with Kubernetes or Docker
• Familiarity with relational databases and JPA/Hibernate