Senior Quality Assurance Engineer – Backbone Core (BCO) (all genders)

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SCAYLE is seeking a Senior Quality Assurance Engineer for Backbone Core in Hamburg. The role centers on owning the QA strategy, risk and edge-case analysis, cross-functional leadership between Product and Engineering, and safeguarding data integrity across high-volume pipelines while mentoring others and integrating QA into CI/CD. You should bring 6+ years in backend QA, strong API and contract testing, OpenAPI/Swagger familiarity, and experience with asynchronous workflows and high-throughput data sync. Practical automation skills with Postman, Newman, or Python/Java/Node.js and a proven shift-left mindset are essential. Apply online on our career page, tailoring your resume to show results in complex REST backends and CI/CD improvements; emphasize collaboration and leadership.

Company Description

SCAYLE is one of the fastest-growing enterprise commerce platforms in the world, enabling brands and retailers to realize their D2C ambitions. SCAYLE stands for innovation, international collaboration, and a strong focus on data. We believe that stepping outside of our comfort zone and making bold decisions is key to growing both professionally and personally. Instead of seeing problems as obstacles, we approach them as opportunities to find better solutions. We work in an environment that encourages flexibility, creativity, and continuous development. What drives us is the shared motivation to make an impact and actively shape the future of eCommerce.

Job Description

What You’ll Do

• Own the QA Strategy: Design, implement, and maintain comprehensive test strategies and automation frameworks for complex features spanning multiple internal systems and core integrations
• Risk & Edge-Case Analysis: Analyze product requirements and technical specs to uncover hidden edge cases, deep business logic scenarios, and potential system bottlenecks before code is written
• Cross-Functional Leadership: Act as a strategic bridge between Product Management and Engineering, ensuring testing aligns perfectly with client expectations and internal business processes
• Data Integrity & Reliability: Lead testing strategies (including regression and contract testing) to safeguard the reliability of high-volume data ingestion, transformation, and distribution pipelines
• Drive Quality Culture: Mentor other team members on QA best practices and continuously improve our testing methodologies and CI/CD pipeline integration

Qualifications

What You Bring

• Deep Backend Expertise: 6+ years of experience in QA and test automation, with a heavy focus on debugging and validating complex REST backend applications
• Technical Mastery: Strong knowledge of HTTP protocols, contract testing, schema validation (OpenAPI/Swagger), and ensuring backward compatibility
• Asynchronous Architecture Savvy: Proven experience designing test approaches for background jobs, asynchronous workflows, and high-throughput data sync pipelines
• Automation First Mindset: Proficiency with API testing tools and automation frameworks (e.g., Postman, Newman, or language-specific frameworks like Python/Java/Node.js) and integrating tests into CI/CD pipelines
• Senior Leadership: Excellent communication skills in fluent English, a proactive mindset for shift-left testing, and a track record of driving agile quality processes

Additional Information

Your perks at a glance: Visit our benefits page.

Simply apply online via our career page - we will get back to you as soon as possible!
(Please note that benefits may vary depending on the location)

A Place Where You Can Be You
We take it as our responsibility to create an environment where everyone feels welcome, exactly as they are.
Different backgrounds and perspectives make us stronger and shape our culture in ways that matter.
What we stand for internally, we stand for as a brand: acceptance, inclusion, and fairness.