Catalin Stefan D.

Hello, I am Catalin. I help SaaS companies ship stable, reliable software by finding the bugs that automated tests and rushed releases often miss. With extensive experience testing complex SaaS platforms, enterprise applications, mobile apps, and safety-critical automotive software, I focus on identifying issues that directly impact users, business workflows, and product quality. My goal isn't simply to report bugs, but it's to help your team deliver software your customers can trust. I work with startups, growing SaaS companies, and established businesses looking for a detail-oriented QA professional who communicates clearly, thinks like a real user, and collaborates effectively with developers and product teams. What I Can Help You With ✔ Manual Testing ✔ Exploratory Testing ✔ Functional Testing ✔ Regression Testing ✔ Smoke & Sanity Testing ✔ Web Application Testing ✔ Mobile Testing (iOS & Android) ✔ Cross-Browser Testing ✔ API Testing (Postman) ✔ UI/UX Validation ✔ User Workflow Testing ✔ Bug Reporting & Documentation ✔ Release Validation ✔ Test Case Creation SaaS Testing Experience I currently perform full-cycle manual QA for ARI, a large automotive repair management SaaS platform used daily by professional repair shops. My testing covers complex business workflows including: • Appointments & Scheduling • Inventory Management • Estimates & Invoicing • Accounting • Vehicle Diagnostics • Customer Management • User Roles & Permissions • Reporting • Notifications • Business Logic Validation Through structured exploratory and regression testing, I have identified hundreds of issues, including: Critical workflow failures Business logic defects Data integrity issues UI/UX inconsistencies Permission and access problems Edge-case scenarios Performance bottlenecks Security-related findings Every reported issue includes clear reproduction steps, expected vs. actual behavior, screenshots or videos when appropriate, severity assessment, and enough detail for developers to reproduce and resolve it quickly. Automotive Software Experience I also have extensive experience testing safety-critical embedded software within the automotive industry. I have contributed to projects developed by: ZF Group Continental Vitesco Technologies Alten for global manufacturers including: BMW Mercedes-Benz Volvo Volkswagen Group (VAG) My work included testing: • Electronic Braking Systems • Belt Starter Generator Systems • ECU Communication • Vehicle Diagnostics • AUTOSAR Basic Software • ISO 26262 ASIL D Safety-Critical Systems Working in automotive taught me one thing: Quality isn't optional when software controls real vehicles. That same mindset now guides every SaaS project I work on. Tools & Technologies • Jira • Trello • TestRail • Postman • BrowserStack • Chrome DevTools • CANoe • CarMaker • EXAM • SIL / HIL • UDS Diagnostics • AUTOSAR BSW Validation Certifications • ISTQB Certified Tester • Certified Scrum Master • MSc in Engineering and Management • BSc in Electrical Engineering & Applied Computer Science Why Clients Like Working With Me I don't just click through features looking for obvious bugs. I approach every application like a real user, exploring workflows, edge cases, unexpected inputs, permissions, and business rules to uncover issues that often go unnoticed. When I find a problem, I don't simply report it—I provide developers with everything they need to understand, reproduce, and fix it efficiently. You can expect: ✔ Thorough exploratory testing ✔ Clear, actionable bug reports ✔ Strong attention to detail ✔ Fast communication ✔ Reliable delivery ✔ Professional collaboration If you're looking for a QA professional who genuinely cares about product quality and user experience—not someone who simply executes test cases—I'd be happy to help. Let's make your software more reliable before your users find the problems. If it can break, I'll find it. Best regards, Catalin Stefan Diac