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Senior Java Developer (Kafka) at Antal – Warszawa | Jobyssey

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Senior Java Developer (Kafka)

Senior Java Developer (Kafka)

Antal · Warszawa, Poland · 2 months ago

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Work mode: Hybrid
Seniority: Senior
Employment: Contract
Category: Software engineering
Experience: 10+ years
Salary: PLN 150 – 200 / hour

api cloud cloud-native devops event-driven-architecture git java kafka kubernetes

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Senior Java developer builds and maintains event-driven backend services and integrations for a global logistics data platform using Java, Kafka, and Kubernetes.

Senior Java Developer (Kafka)

💰 150-200 PLN/h net + VAT

📝 B2B/UoP
📍 Warsaw | Hybrid model: 1 day per week from the office

Join an international organization delivering a large-scale Big Data integration platform connecting systems across multiple countries within the logistics industry. This is a strategic migration and modernization initiative focused on building scalable, event-driven solutions that support critical business operations.

Your role

As a Senior Java Developer, you will be responsible for designing and developing backend services and integrations for a complex enterprise ecosystem. You will help modernize legacy applications, drive technical decisions, and build robust event-streaming solutions used across international markets.

What we offer

Long-term cooperation on a strategic international program
Competitive rate up to 200 PLN/h B2B or employment contract
Hybrid work model (1 office day per week)
LuxMed and Multisport
Opportunity to work with modern technologies including Java, Kafka, Kafka Streams, Kubernetes, and cloud-native architectures
Real impact on the development of a global integration platform

Technology stack: Java 17+, Spring Boot, Kafka, Kafka Streams, REST API, Microservices, Kubernetes, PostgreSQL/MS SQL/Oracle, Git.

10+ years of experience in software development
Strong expertise in Java 17+ and Spring Boot
Very strong Kafka knowledge (must-have)
Hands-on experience with Kafka Streams
Experience building microservices and event-driven architectures
Strong understanding of integrations, REST APIs, and messaging systems
Experience with relational databases (PostgreSQL, MS SQL, Oracle)
Kubernetes and basic DevOps knowledge
Fluent English

Nice to have:

Confluent Kafka experience
Confluent Kafka Developer certification