Senior Java Backend & Kafka Microservices Lead

Sii Poland; Katowice; On-site; PLN 210,000 - 320,000; Full time

Benefits offered by this job

Great Place to Work

Profit sharing

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Regular integration events

Comfortable and well-equipped offices

MySii app

Medical care

Job summary

Sii Poland is seeking an experienced Senior Java Developer to help build an enterprise data integration and processing platform. You will focus on scalable backend services, microservices, and event-driven integrations in a global environment.

Responsibilities include designing and implementing data processing solutions, modernizing legacy apps, and contributing to architecture discussions. Strong Kafka experience and English communication are essential.

Qualifications

• 10+ years of commercial software development experience with Java backend.
• Strong production experience with Apache Kafka.
• Experience designing microservices and event-driven architectures.
• Experience with distributed systems and enterprise integrations.
• Willingness to contribute to technical design discussions.
• Very good English communication skills.
• Residence in Poland.
• CCDAK certification.

Responsibilities

• Design, develop, and maintain scalable backend services and microservices using Java and Spring Boot
• Implement event-driven architectures and data-processing solutions with Apache Kafka
• Build enterprise integrations between internal and external systems via APIs and messaging
• Participate in technical design and architecture discussions
• Support modernization of legacy applications into scalable cloud-ready solutions
• Monitor, troubleshoot, and optimize application performance across distributed environments
• Collaborate with developers, architects, and stakeholders on data integration initiatives

Skills

Java backend

Microservices

Event-driven

Distributed systems

Architecture discussions

English communication

Education

CCDAK certification

Tools

Apache Kafka

Kafka Streams

Kafka Connect

Azure

Kubernetes

OpenShift

Docker

Podman

Job description

Sii Poland is seeking an experienced Senior Java Developer to help build an enterprise data integration and processing platform. You will focus on scalable backend services, microservices, and event-driven integrations in a global environment.

Responsibilities include designing and implementing data processing solutions, modernizing legacy apps, and contributing to architecture discussions. Strong Kafka experience and English communication are essential.