Senior QA Engineer (m/f/d) - Add-on

As part of SCAYLE’s Add-on Unit, we design, build, test, fix, release, and monitor modular, plug-and-play e-commerce solutions for the SCAYLE commerce engine, solutions that enable additional capabilities for our tenants, drive conversion, enhance operational efficiency, and ensure seamless integrations across diverse customer setups.
 

Within this context, our QA Engineer plays a key role in safeguarding the quality and stability of these add-ons throughout their entire lifecycle. As an essential member of the unit, the QA is responsible for validating complex FE/BE interactions, ensuring integration reliability, and supporting the team in delivering robust, production-ready features.

What you will do:

• Testing complex frontend and backend integrations between SCAYLE, Add-ons, and external systems (e.g., marketplaces, partner services, etc).

• Performing comprehensive API testing (CRUD operations, error validation, contract behavior) using tools like Postman.

• Executing and maintaining E2E, regression, and functional tests across multiple customer scenarios and configurations.

• Debugging cross-system communication by analyzing logs, payloads, and service interactions to identify root causes quickly and accurately.

• Using monitoring tools such as Datadog to validate system performance, trace flows, and detect inconsistencies or failures after releases.

Who you are:

• 6+ years of working experience as a QA Engineer

• Strong experience testing complex FE and BE integrations (web apps, microservices, external systems)

• Solid understanding and hands-on experience with RESTful APIs, CRUD operations, and tools like Postman

• Basic to intermediate SQL knowledge (writing simple queries, joins, validations).

• Fluent in English

Benefits

• Grow together with one of the fastest growing eCommerce companies in Europe
• Flexible working times (10 AM - 16 PM German Time Zone as core working-time)
• 40% discount on our online shop
• Fresh fruits + drinks everywhere
• Language courses (German & English)
• Free sports courses & reduced price for gym membership
• Subsidized public transportation ticket
• Free choice of hardware and operating system (Mac, Windows, Linux) also for private usage
• State-of-the-art tech stack running on AWS
• Modern office in the city center of Hamburgs
• International working environment and English as company language
• Agile work environment (MOVE) and cross-functional teams
• Free access to Germany’s greatest developer conference code.talks
• Free access to online learning platforms like Laracast, Egghead and A Cloud Guru
• Help in relocation and VISA process