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# Senior NAV/BC Developer

- **Company:** Mister Spex GmbH
- **Location:** Berlin, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), .NET Framework, Microsoft Azure, Big Data, Client/Server Application Language (C/AL), Software Quality, Continuous Integration, Microsoft Dynamics NAV, Python (Programming Language), Windows PowerShell, Simple Object Access Protocol (SOAP), SQL Databases, Systems Integration, Web Services, Reliability of Systems, Git
- **Published:** June 7, 2026
- **Apply:** https://de.indeed.com/viewjob?jk=9d18f69929c112bb

## About the Role

Do you have experience in Web services?, * Advanced functional and technical knowledge of Microsoft Dynamics NAV modules

 * Strong experience with SQL, web services (REST/SOAP) and system integrations
 * Experience with webshops or payment providers is a strong plus.
 * Familiarity with Git and ideally Azure DevOps (CI/CD, pipelines)
 * Additional experience with .NET, JavaScript, Python, PowerShell or Azure is welcome
 * Experience working with large databases or high-transaction environments is a plus
 * A collaborative mindset, strong communication skills and a proactive, solution-oriented approach

## Description

At Mister Spex, we're reshaping the technological backbone that powers seamless shopping experiences, from online orders to in-store purchases.
As a Senior NAV/BC Developer (f/m/d), you'll help shape and scale our ERP and payment ecosystem. Your work connects our internal architecture with leading payment providers, ensuring smooth, secure and fast transactions for millions of customers across Europe.

If you enjoy building clean, performant, and reliable systems in a collaborative environment, this is the role for you!

How you contribute

 * Design and develop scalable ERP features and architectural components
 * Build and maintain integrations with internal systems and major payment providers (e.g. PayPal, Klarna, credit cards, POS)
 * Work with C/AL, AL and SQL; extend solutions using .NET, JavaScript and other technologies
 * Implement unit and functional tests to ensure code quality and system reliability
 * Manage and evolve source code in Git, contributing to clean and maintainable development workflows
 * Improve system performance and stability, especially in high-load and large-data environments
 * Collaborate cross-functionally to translate business needs into robust technical solutions


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