Senior/Expert Java developer

B2Bnetwork • English • IT Outsourcing & Dedicated Teams • Software Testing & QA • Java • 14 days ago

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In office

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Senior · 6+ years exp

Confirmed on the employer's own hiring board on Oct 1, 2026. First seen by Alion on Sep 18, 2026. B2Bnetwork scores B on the Alion truth index.

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B2Bnetwork

B2Bnetwork (B2B.net S.A.) is a Warsaw-based IT outsourcing and software testing company that supplies IT engineers and whole teams to clients in data and analytics, cloud, cybersecurity, digital workplace and application development and maintenance. It operates from the Kopernik Office Buildings in Warsaw, runs QA, cloud, security and academy networks, organises ISTQB examinations, and places many specialists on projects for large banks, most visibly Nordea in Warsaw and Gdansk. Its postings cover Java and Python developers, test automation engineers, IT analysts, data engineers, solution architects, Scrum masters and project managers, largely on B2B contracts.

b2bnetwork.ai • HQ: Warsaw, Poland • IT Outsourcing & Dedicated Teams • Software Testing & QA • IT Staffing & Staff Augmentation • Est. 2019

Candidate experience and background:

-At least 6 years of experience in Java software development.

-Hands-on experience with the Spring Framework, Spring Boot, and relational databases (PostgreSQL and/or Db2).

-Hands-on experience developing microservices.

-Experience using AI-assisted development tools (e.g., GitHub Copilot).

-Experience building distributed, highly available, and high-throughput applications.

-Very useful to have experience with: Kafka, CI/CD pipelines, Jenkins, Docker, Kubernetes, REST APIs, Maven and JUnit

-Nice to have knowledge of Specification-Driven Development (SDD) and SDD frameworks

-Fluent in spoken and written English.

Role in Embedded banking area:

-Developing new services and solutions in client's Embedded Banking Service Domain (Payments Service Area)

-Being part of newly created Scrum team with experienced colleagues

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