Senior Java Developer (Kafka) — Remote

Peoplemore; Kraków; Remote; PLN 179,000 - 220,000; Full time

Benefits offered by this job

Remote work

Private medical care

Sports card

Training courses

Conference opportunities

Job summary

Peoplemore in Kraków / remote is seeking a Senior Java Developer with Kafka to join a scalable, high-performance engineering project. You will design solutions, choose technologies, and implement asynchronous, event-driven systems with solid testing and maintainability in mind.

You'll work with Java, Spring Boot, Kafka, SQL/NoSQL, CQRS, and modern tooling, collaborating across teams to deliver robust, scalable software for global clients.

Qualifications

• Strong commercial experience with Java and Spring Boot.
• Very good knowledge of modern Java, including Records, immutability and Stream API.
• Solid understanding of Java fundamentals: equals/hashCode, collections, reflection and Garbage Collection.
• Good understanding of Spring internals and Dependency Injection.
• Strong knowledge of SOLID, clean code, design patterns and code smells.
• Experience with Kafka and event-driven architecture.
• Understanding of idempotency, at-least-once delivery and Dead Letter Queues.
• Experience designing scalable, asynchronous and high-performance systems.
• Good understanding of SQL and NoSQL databases and ability to choose the right approach depending on the use case.
• Knowledge of CQRS, ACID, indexing and database partitioning.
• Ability to design solutions with performance, isolation, maintainability and security in mind.
• Ability to discuss architectural decisions, explain trade-offs and adapt solutions based on technical discussions.
• Practical experience using AI tools such as GitHub Copilot, with the ability to independently verify generated code through unit tests and edge cases.
• Strong communication skills and a collaborative approach to software design.
• Very good English and Polish.

Skills

Java

Spring Boot

Kafka

Event-driven architecture

SQL/NoSQL

CQRS

Distributed systems

High-performance

Unit testing

English

Polish

Tools

GitHub Copilot

Job description

Peoplemore in Kraków / remote is seeking a Senior Java Developer with Kafka to join a scalable, high-performance engineering project. You will design solutions, choose technologies, and implement asynchronous, event-driven systems with solid testing and maintainability in mind.

You'll work with Java, Spring Boot, Kafka, SQL/NoSQL, CQRS, and modern tooling, collaborating across teams to deliver robust, scalable software for global clients.