Mobile Application Tester – Job Description

About the Role

Department: Technology

Location: Pakistan/Egypt

Employment Type: Full-Time

Reports To: QA Lead

We are looking for a detail-oriented and experienced Mobile Application Tester to join our QA team. You will be responsible for ensuring the quality, performance, and reliability of our mobile applications (iOS & Android) with a strong focus on API testing and end-to-end integration testing. You will work closely with developers, product managers, and backend engineers to deliver seamless user experience.

Key Responsibilities

Mobile Application Testing

Design, develop, and execute manual and automated test cases for iOS and Android applications
Perform functional, regression, smoke, sanity, and exploratory testing on mobile builds
Test across multiple devices, OS versions, and screen resolutions
Validate UI/UX against design specifications and product requirements
Conduct performance, load, and stress testing on mobile apps
Test push notifications, deep links, background processes, and offline behavior
Verify app behavior across network conditions (2G, 3G, 4G, 5G, Wi-Fi, no connectivity)

API Testing

Design and execute REST API test cases using tools like Postman
Validate API request/response structures, status codes, headers, and payloads
Perform positive, negative, and boundary testing on all API endpoints
Verify authentication mechanisms (JWT, OAuth 2.0, API keys)
Test rate limiting, throttling, and error handling behaviour
Maintain and manage Postman collections scripts for automated API test suites
Validate data contracts and schema consistency between API versions

Integration Testing

Execute end-to-end integration tests between mobile app, backend APIs, and third-party services
Validate data flow and communication between microservices
Test payment gateway integrations, third-party SDKs, and external service APIs
Verify webhook behaviors, callbacks, and event-driven flows
Ensure consistency between app behavior and backend data (database validation)
Collaborate with backend teams to trace and debug integration failures

Test Management & Reporting

Write detailed bug reports with clear reproduction steps, screenshots, and logs
Maintain test plans, test cases, and traceability matrices in tools like YouTrack.
Track, prioritize, and follow up on defects through to resolution
Participate in sprint planning, daily standups, and retrospectives (Agile/Scrum)
Generate and share QA reports with stakeholders

Required Skills & Qualifications

Must-Have

3–5 years of experience in mobile application testing (iOS & Android)
Hands-on experience with API testing tools: Postman.
Strong knowledge of RESTful APIs, HTTP methods, and JSON/XML
Experience with mobile testing tools: Xcode simulator, Android Studio emulator, real devices
Familiarity with Fiddler for network traffic interception and debugging
Understanding of authentication flows: OAuth, JWT, session tokens
Experience with bug tracking tools: Jira, YouTrack, or similar
Ability to read and interpret API documentation (Swagger/OpenAPI)
Knowledge of the SDLC and Agile/Scrum methodology
Strong analytical and problem-solving skills with high attention to detail

Nice-to-Have

Experience with mobile test automation frameworks: Appium
Knowledge of CI/CD pipelines and integrating tests with Jenkins, GitHub Actions
Experience with performance testing tools: JMeter
Familiarity with SQL for backend data validation
Experience testing financial, fintech, or data-heavy applications
Understanding of WebSocket or real-time data testing
Scripting knowledge in Python, JavaScript, or Bash for test automation

Tools & Technologies

CategoryTools
API Testing
Postman
Mobile Testing
Xcode, Android Studio, BrowserStack, Sauce Labs
Network Debugging
Fiddler
Test Management
YouTrack / Jira
Automation (Preferred)
Appium
CI/CD
Jenkins, GitHub Actions
Version Control
Git / GitHub
Education & Certifications
ISTQB / CTFL certification is a plus

mobile application tester

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