Sr. QA Engineer, tvScientific

About Pinterest: Millions of people around the world come to our platform to find creative ideas, dream about new possibilities and plan for memories that will last a lifetime. At Pinterest, we’re on a mission to bring everyone the inspiration to create a life they love, and that starts with the people behind the product. Discover a career where you ignite innovation for millions, transform passion into growth opportunities, celebrate each other’s unique experiences and embrace the flexibility to do your best work. Creating a career you love? It’s Possible. About tvScientific tvScientific is the first and only CTV advertising platform purpose-built for performance marketers. We leverage massive data and cutting-edge science to automate and optimize TV advertising to drive business outcomes. Our solution combines media buying, optimization, measurement, and attribution in one, efficient platform. Our platform is built by industry leaders with a long history in programmatic advertising, digital media, and ad verification who have now purpose-built a CTV performance platform advertisers can trust to grow their business. tvScientific is looking for a Senior QA Engineer for its Web Platform with strong expertise in web and API testing. This role requires a balance of manual testing excellence and automation skills, with a focus on validating end-to-end user flows across frontend, backend services, and APIs. You will partner closely with frontend engineers, backend engineers, product managers, and designers to ensure our web platform and APIs are reliable, secure, and performant. What you'll do: Own and drive quality for web platform features, spanning UI, APIs, and backend services Design and execute manual test cases and exploratory testing for complex web and API workflows Conduct thorough regression testing when bugs are resolved. Build and maintain automated test suites for: Validate frontend–backend integration, data consistency, and error handling Perform API contract testing, schema validation, and negative/edge-case testing Collaborate with engineers during design, implementation, and code reviews to improve testability and catch issues early Integrate automated tests into CI/CD pipelines to provide fast, reliable feedback Analyze test failures, investigate root causes, and drive issues to resolution Advocate for quality best practices, including shift-left testing, risk-based testing, and automation strategy Identify, document, and track software defects using bug tracking tools like Jira. What we're looking for: Experience in QA / Quality Engineering, with a strong focus on web platforms and APIs Proven hands-on experience with manual testing of complex, consumer-facing web applications Strong experience building and maintaining API tests using tools such as Postman, REST-assured, Supertest, or similar Hands-on experience with web automation frameworks (Playwright, Cypress) Solid understanding of HTTP, REST and API design principles Proficiency in at least one programming or scripting language (JavaScript, TypeScript) Experience working in Agile/Scrum environments Strong debugging, analytical, and communication skills Strategic partnership with stakeholders / Cross-functional collaboration that is high-trust and high-velocity Nice-to-Haves: Experience testing large-scale, high-traffic web platforms Familiarity with React or modern frontend frameworks Experience with performance, load, or reliability testing for APIs and web applications Exposure to feature flags, experimentation platforms, or observability tools In-Office Requirement Statement: We recognize that the ideal environment for work is situational and may differ across departments. What this looks like day-to-day can vary based on the needs of each organization or role. Relocation Statement: This position is not eligible for relocation assistance. Visit our PinFlex page to learn more about our working model. #LI-SM4 #LI ... (truncated, view full listing at source)