Senior QA Engineer (Offline-First Applications)

Overview

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.

Pay: ₹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.)?

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Have you tested applications that support offline or disconnected functionality, including data synchronization and conflict resolution? Please briefly describe your experience.
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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