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# Senior QA Engineer - POS Hardware

- **Company:** Unzer Group GmbH
- **Location:** Berlin, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Microsoft Word, Microsoft Excel, Application Programming Interfaces (APIs), Confluence, JIRA, Issue Tracking Systems, JSON, Microsoft Office, Network Service, Microsoft PowerPoint, Standard Sql, SQL Databases, Postman, Data Management, Api Management, OpenSearch
- **Published:** November 5, 2026
- **Apply:** https://startup.jobs/senior-qa-engineer-pos-hardware-m-f-d-unzer-10674663

## About the Role

* Experience or strong interest in QA/testing of software and hardware.
 * Basic understanding of programming concepts; experience with JSON is a plus.
 * Basic knowledge of Opensearch, Postman, and SQL.
 * Experience with JIRA and Confluence is an advantage.
 * Good written and verbal communication skills; ability to explain technical topics to non-technical audiences.
 * Strong documentation skills and attention to detail.
 * Familiarity with Microsoft Office (Word, Excel, PowerPoint).
 * Fluency in both English and German
 * Team player with a proactive and analytical mindset.
 * Previous experience with payment terminals, APIs, or cash register systems is a plus. Please note that we will not sponsor your visa or relocation, and you must have a valid work permit to be eligible for this position.

What's next?

 * Does it sound exciting? - Apply with your CV in English. Please don't shy away if you don't meet all the requirements! We're looking forward to meeting you.

## Description

As a QA Engineer, you will play a key role in supporting the quality assurance of both hardware and software Point of Sales - POS products. You will work closely with multiple systems for merchant onboarding and management, test API integrations, and ensure the successful deployment of new features. You will collaborate with developers and various teams, provide documentation, user support, and training, and contribute to continuous improvement in product quality and team communication. At the same time, you will have the opportunity to work on exciting key account projects in order to integrate the best possible Unzer product solution., * Test and validate new payment terminal hardware and software releases.

 * Collaborate on systems used for merchant onboarding and master data management.
 * Test API integrations with Network Service Providers (NSPs), requiring familiarity with JSON.
 * Write clear documentation and user manuals for new features.
 * Use JIRA for issue tracking and basic project management tasks.
 * Use Confluence for knowledge sharing and documentation.
 * Employ tools like Opensearch, Postman, and basic SQL for testing and data review.
 * Leverage basic background in cash register systems for relevant QA tasks.
 * Communicate effectively with cross-functional and developer teams.
 * Support and resolve requests from other teams regarding features, products or systems.
 * Analyze special tasks and provide QA insights and recommendations.
 * Deliver presentations and training sessions about new features and product solutions to internal teams.
 * Work in both English and German (proficiency in both is preferred).