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September 8, 2026

Senior Back-end Developer - Microservices Architecture

Senior • Remote

110 - 130 PLN/yr

Warsaw, MZ, Poland

We are looking for a Senior Backend Developer to join a project focused on secure B2B/B2G document and data exchange.

You will work with microservices architecture, API-driven development and AS4, a modern standard for secure and reliable business document exchange widely used in European digital ecosystems such as Peppol and eDelivery.

Requirements

  • 6+ years of experience in software development
  • Strong experience with Microservices Architecture
  • Experience with API-driven development and system integration
  • Hands-on experience with AS4 or related technologies such as SOAP, Web Services, AS2, eDelivery or Peppol
  • Good understanding of distributed systems and enterprise integration

The project

A technically challenging, international integration project involving modern microservices, APIs and secure B2B/B2G communication at enterprise scale.

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