Senior Java Developer — Real-Time Data & Kafka

b2bnetwork; Województwo pomorskie; On-site; PLN 180,000 - 280,000; Full time

Job summary

b2bnetwork is seeking a Senior Java Developer to join the Fraud Management Domain in a fast-paced scrum team. You will build near real-time data pipelines, design scalable microservices, and collaborate with product owners to clarify requirements.

You should be an expert in Java, Spring Boot, Kafka, and relational databases, with a track record of performance tuning, integration patterns, and maintainable code. English communication expected; Poland-based role.

Qualifications

• Senior server-side Java development with Java E3/Spring Boot and REST/SOAP.
• Performance profiling and optimization experience.
• Microservices architecture and integration patterns.
• Messaging with Kafka and relational databases (Oracle or similar).
• Knowledge of NoSQL databases; Redis is a plus.

Responsibilities

• Develop as a Senior Java Developer in the Fraud Management Domain.
• Collaborate with other developers in a scrum team.
• Contribute to solution design and maintainability of applications.
• Build and maintain near real-time data pipelines.
• Interact with product owners and stakeholders to clarify requirements.
• Document designs and solutions with teammates.

Skills

Java

Spring Boot

Kafka

Performance analysis

Microservices

SQL

NoSQL (Redis)

Job description

b2bnetwork is seeking a Senior Java Developer to join the Fraud Management Domain in a fast-paced scrum team. You will build near real-time data pipelines, design scalable microservices, and collaborate with product owners to clarify requirements.

You should be an expert in Java, Spring Boot, Kafka, and relational databases, with a track record of performance tuning, integration patterns, and maintainable code. English communication expected; Poland-based role.