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Senior Back-end Developer - Microservices Architecture

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Poznań

Lublin

Warszawa

Olsztyn

Expires Nov 29, 2026

5 days ago

In short

Senior Backend Developer for secure B2B/B2G document exchange using microservices and AS4. Requires 6+ years of experience, microservices, API development, and AS4/SOAP/Web Services.

Keywords

microservices AS4 API development SOAP web services distributed systems enterprise integration backend development

AI-written summary based on the listing content.

Senior Backend Developer – Microservices & AS4

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.