Senior Java Developer - Kafka & Scalable Systems (Remote)

Traffit; Kraków; Remote; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Fully remote work

Kraków office available

Job summary

People More is seeking a Senior Java Developer to join a project where scalability and performance are key. You will work with Spring, Kafka, SQL/NoSQL databases, CQRS and distributed asynchronous systems, delivering high‑quality, scalable solutions.

We expect strong Java knowledge (Records, immutability, Streams), design patterns, and the ability to justify architectural choices, supported by unit tests and edge-case coverage.

Qualifications

• Strong experience with Java and Spring.
• Knowledge of modern Java features (Records, immutability, Streams).
• Experience with Kafka and event-driven architecture.
• Experience designing scalable, asynchronous, high-performance systems.
• Proficiency in SQL/NoSQL databases and CQRS.
• English and Polish language skills.

Responsibilities

• Design scalable, asynchronous systems and optimize performance.
• Explain trade-offs and adapt solutions after discussions.
• Collaborate on architecture with stakeholders.
• Verify code with unit tests and edge-case coverage.

Skills

Java

Spring

Kafka

English

Polish

Design patterns

Unit tests

Communication

Tools

GitHub Copilot

IntelliJ IDEA

Kafka ecosystem

Job description

People More is seeking a Senior Java Developer to join a project where scalability and performance are key. You will work with Spring, Kafka, SQL/NoSQL databases, CQRS and distributed asynchronous systems, delivering high‑quality, scalable solutions.

We expect strong Java knowledge (Records, immutability, Streams), design patterns, and the ability to justify architectural choices, supported by unit tests and edge-case coverage.