Senior Java Developer

37.29 - 45.58 USDNet per hour - B2B
Java

Senior Java Developer

Java
N/A, Warszawa

B2Bnetwork

Full-time
B2B
Senior
Hybrid
37.29 - 45.58 USD
Net per hour - B2B

Job description

We’re looking for a Senior Java Developer to support the development of business-critical backend services in a distributed, high-throughput architecture. The system is built on Kafka-based asynchronous communication and designed with a strong focus on performance, scalability, and reliability.

You will be involved in designing and developing clean, event-driven microservices, working closely with experienced engineers in an international, agile setup.

 

Tech stack

  • Java 11+, Spring Boot

  • Apache Kafka – producer/consumer optimization, retries, partitioning

  • SQL: Oracle / DB2 / MSSQL

  • Docker, Git, Maven

  • Microservices architecture

  • CI/CD pipelines

  • Domain-Driven Design (DDD), Event Sourcing

  • Monitoring: Splunk / Grafana (nice to have)


What we expect

  • 5+ years of experience in Java backend development

  • Strong hands-on skills in Kafka producer/consumer design and optimization

  • Solid experience in SQL and relational databases (Oracle, DB2, MSSQL or similar)

  • Proven background in building distributed, high-availability, high-performance systems

  • Practical understanding of DDD, Event Sourcing, microservices, and clean architecture

  • Fluent English for daily collaboration

Tech stack

    English

    C1

    Java

    master

    Apache Kafka

    advanced

    SQL

    advanced

    Spring Boot

    advanced

    CI/CD

    regular

    Docker

    regular

    Oracle

    regular

Office location

Published: 30.01.2026

About the company

B2Bnetwork

W B2B Network wierzymy, że najlepsze efekty powstają wtedy, gdy łączymy talenty specjalistów z wyzwaniami, które naprawdę do nich pasują. Dlatego to Ty wybierasz projekty, a my zapewniamy stabilne warunki, wsparcie i dos...

Company profile

Senior Java Developer

37.29 - 45.58 USDNet per hour - B2B
Summary of the offer

Senior Java Developer

N/A, Warszawa
B2Bnetwork
37.29 - 45.58 USDNet per hour - B2B
By applying, I consent to the processing of my personal data for the purpose of conducting the recruitment process. Informujemy, że administratorem danych jest B2B.net S.A. z siedzibą w Lidzbarku, ul. Wielki Łęck 81A (dalej jako "administrator"). Mas... MoreThis site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.