Senior QA Engineer

We are seeking an experienced Senior QA Engineer to test and validate offline-first MERN stack applications deployed on Azure cloud environments with CI/CD pipelines. The ideal candidate will have strong expertise in manual and automation testing, with a focus on ensuring data integrity, synchronization accuracy, application reliability, and performance under intermittent connectivity conditions. Key Responsibilities Functional & Integration Testing Perform end-to-end testing of MERN stack applications (React, Node.js, MongoDB).Validate frontend workflows, backend services, and API integrations.Design, execute, and maintain test plans, test cases, and test scripts.Ensure application functionality meets business and technical requirements.Offline / Disconnected Testing Test applications under low-connectivity and no-connectivity conditions.Validate local data storage mechanisms such as IndexedDB and LocalStorage.Verify synchronization processes, conflict resolution, and data merging scenarios.Simulate real-world network conditions including latency, packet loss, and intermittent connectivity.Ensure eventual consistency and data reliability across systems.Azure Cloud & CI/CD Testing Work with Azure DevOps pipelines to integrate automated testing.Validate application builds, deployments, and release processes.Perform testing on Azure services including App Services, Functions, and APIs.Ensure quality gates and testing standards within CI/CD pipelines.Automation Testing Develop and maintain automation frameworks and test suites.Automate UI testing using Selenium, Cypress, or Playwright.Automate API testing using Postman, RestAssured, or Supertest.Integrate automated tests into CI/CD workflows.Performance & Reliability Testing Conduct load and performance testing during synchronization operations.Validate system behavior during bulk data synchronization and offline data accumulation.Utilize tools such as JMeter and k6 for performance testing.Identify bottlenecks and recommend optimization improvements.Data Validation & Defect Management Validate data accuracy before and after synchronization.Test duplicate handling, conflict resolution, and edge-case scenarios.Investigate partial sync failures and data corruption scenarios.Log, track, and manage defects using JIRA or Azure Boards.Perform root cause analysis (RCA) and collaborate with development teams on issue resolution.Required Skills 5+ years of experience in Software Testing and Quality Assurance.Strong understanding of SDLC, STLC, and Agile methodologies.Expertise in test case design and test planning.Experience in both Manual and Automation Testing.Hands-on experience with:Selenium, Cypress, or PlaywrightPostman, RestAssured, or SupertestJMeter or k6Experience testing REST APIs and web applications.Knowledge of Azure DevOps and CI/CD testing practices.Understanding of offline-first architectures, synchronization mechanisms, and data validation concepts.Strong analytical, debugging, and problem-solving skills.Good to Have Experience testing offline/disconnected applications.Exposure to MERN stack applications.Knowledge of Azure cloud services.Experience with database testing and data validation.Familiarity with performance and reliability engineering practices.Compensation: 2,000,000.00 - 3,000,000.00 per year Ability to commute/relocate: Mumbai, Maharashtra (Mumbai): Reliably commute or planning to relocate before starting work (Preferred)Application Question(s): How many years of experience do you have in Manual and Automation Testing, and which automation tools have you worked with (Selenium, Cypress, Playwright, etc.) * Have you tested applications that support offline or disconnected functionality, including data synchronization and conflict resolution Please briefly describe your experience. * Do you have hands-on experience with Azure DevOps, CI/CD pipeline testing, API testing, and performance testing tools such as Postman, JMeter, or k6 How soon can you join us Work Location: In person We are seeking an experienced Senior QA Engineer to test and validate offline-first MERN stack applications deployed on Azure cloud environments with CI/CD pipelines. The ideal candidate will have strong expertise in manual and automation testing, with a focus on ensuring data integrity, synchronization accuracy, application reliability, and performance under intermittent connectivity conditions. Key Responsibilities Functional & Integration Testing Perform end-to-end testing of MERN stack applications (React, Node.js, MongoDB).Validate frontend workflows, backend services, and API integrations.Design, execute, and maintain test plans, test cases, and test scripts.Ensure application functionality meets business and technical requirements.Offline / Disconnected Testing Test applications under low-connectivity and no-connectivity conditions.Validate local data storage mechanisms such as IndexedDB and LocalStorage.Verify synchronization processes,