Java Backend Developer

PRIMUS Global Solutions (PRIMUS UK & Europe); Warszawa; On-site; PLN 180,000 - 260,000; Full time

Job summary

PRIMUS Global Solutions in Warsaw seeks a skilled Java developer to design, develop, and maintain high performance core Java applications. You will work on multithreading, memory management, and performance tuning within a collaborative team.

You should be proficient in Spring Boot, REST, JMS, SOAP, and Microservices, with strong knowledge of SQL databases and Hibernate/JPA. Candidates with JVM internals expertise are encouraged.

Qualifications

• Proficiency in Java and core Java concepts.
• Experience with multithreading and memory management.
• Knowledge of REST, JMS, and SOAP services.

Responsibilities

• Design, develop and maintain high performance Java applications.
• Review code and participate in architecture discussions.
• Collaborate with cross functional teams including QA and DevOps.

Skills

Java

Multithreading

Performance tuning

REST API

JMS

Tools

Spring Boot

Hibernate JPA

SQL databases

JDBC

Microservices

Job description

• Design develop and maintain high performance Java applications using Core Java
• Write clean efficient and well structured code following best practices
• Work on multithreading concurrency memory management and performance tuning
• Participate in technical design discussions code reviews and architecture decisions
• Collaborate with cross functional teams including architects QA DevOps and business stakeholders
• Ensure adherence to coding standards security guidelines and SDLC processes
• Mentor junior developers and contribute to technical knowledge sharing
• Experience with REST JMS SOAP Microservices Core Java
• Proficiency in Java
• Collections Generics Exceptions
• Multithreading Concurrency
• Spring boot Microservices
• JVM internals memory management
• Data structure and algorithm experience
• Experience with SQL databases
• Hands on with JDBC and ORM concepts Hibernate JPA