Senior QA Automation Engineer (JavaScript)

We are looking for a Senior QA Automation Engineer who breathes backend testing. If you are tired of UI testing and want to focus 100% on complex backend APIs, this is the role for you. There is absolutely zero UI testing involved here. You will be responsible for testing high-scale, high-availability backend systems hosted exclusively on AWS. While our team currently leans towards JavaScript and tools like Playwright or Cypress, we are highly flexible - if you are a backend testing expert who prefers Python or Golang and uses different frameworks, we want to talk to you!Essential functionsOwn Backend Quality: Develop, maintain, and scale QA tools and frameworks specifically designed for complex REST API and backend automated testing.Define Test Strategy: Design and execute complex end-to-end, contract, load, and chaos tests integrated seamlessly into CI/CD pipelines.Collaborate & Optimize: Work closely with Engineering and Product teams to identify application faults, improve QA processes, and optimize test metrics across the organization.Document & Report: Create comprehensive test plans, maintain automation scripts, report bugs, and communicate quality metrics effectively.Promote Best Practices: Act as a QA advocate, defining design principles for automated test procedures and elevating the overall testing culture within the team.Hands-on Exploration: Execute exploratory and manual API tests when necessary to uncover edge cases in high-availability environments.Qualifications5+ years of experience in QA Automation with a strict focus on Backend/API testing (this role does not involve any front-end/UI testing).Programming Proficiency: Strong coding skills in JavaScript (preferred), Python, or Golang (Please note: standard Java is not a fit for this stack).Testing Frameworks: Familiarity with modern automation tools. We prefer Playwright or Cypress, but we are highly flexible if you use other robust backend testing tools (e.g., K6, Gremlin, PACT).Deep API Knowledge: Extensive hands-on experience testing REST APIs and implementing various test types (E2E, contract, load, chaos).Engineering Practices: Proficiency with Git, version control workflows, and integrating tests into CI/CD pipelines.Communication: Fluency in English (B2 level or above) with the ability to clearly explain test progress and quality issues.Would be a plusHands-on experience with AWS services (specifically SQS, SNS, DynamoDB, and S3).Background in testing financial systems or working in high-scale, distributed environments.Solid understanding of observability practices (monitoring, tracing, alerting).A proven track record of proactively improving QA processes and establishing quality metrics within a team.We offerOpportunity to work on bleeding-edge projectsWork with a highly motivated and dedicated teamCompetitive salaryFlexible scheduleBenefits package - medical insurance, sportsCorporate social eventsProfessional development opportunitiesWell-equipped officeAbout usGrid Dynamics (NASDAQ: GDYN) is a leading provider of technology consulting, platform and product engineering, AI, and advanced analytics services. Fusing technical vision with business acumen, we solve the most pressing technical challenges and enable positive business outcomes for enterprise companies undergoing business transformation. A key differentiator for Grid Dynamics is our 8 years of experience and leadership in enterprise AI, supported by profound expertise and ongoing investment in data, analytics, cloud & DevOps, application modernization and customer experience. Founded in 2006, Grid Dynamics is headquartered in Silicon Valley with offices across the Americas, Europe, and India.