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 Playwright
  
  
  • Postman, RestAssured, or Supertest
  
  
  • JMeter or k6
  
  
  
  


• Experience 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.