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

companyDescription 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. jobDescription 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 additionalInformation Main Benefits Flexible working times 40% discount on our ABOUT YOU online shop Fresh fruits + drinks everywhere Language courses (German & English) Free sports courses & reduced price for Wellpass membership Subsidized public transportation ticket Free choice of hardware and operating system (Mac, Windows, Linux) also for private usage Modern office in the city center of Hamburg International working environment and English as company language Agile work environment and cross-functional teams Dog-friendly office Professional training Company pension plan Help in relocation and VISA process (Benefits may vary depending on location) Simply apply online via our career page - we will get back to you as soon as possible! 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 a fairer approach to fashion.