Manual QA Engineer – iOS and Android Mobile App Testing

Company: USA WINZONS
Location: San Francisco, CA (Hybrid/On-Site Preferred)
Job Type: Full-Time
Industry: Technology / Mobile Applications

USA WINZONS is looking for a skilled Manual QA Engineer with a passion for mobile technology to join our mobile app development team. You’ll be responsible for end-to-end testing of our iOS and Android applications, ensuring an exceptional user experience across platforms.

This position is ideal for someone who enjoys working closely with developers, product managers, and designers to build bug-free, intuitive, and high-performance mobile apps that impact thousands of users.

• Conduct comprehensive manual testing of iOS and Android applications
• Create, execute, and maintain detailed test cases and test plans
• Identify, document, and track bugs and inconsistencies in mobile apps
• Collaborate with developers and product teams to ensure quality throughout the development lifecycle
• Perform regression testing and exploratory testing before releases
• Verify fixes and maintain consistent QA documentation
• Provide feedback to improve usability, performance, and functionality

• 2+ years of experience in manual QA for mobile applications
• Hands-on experience testing both iOS and Android platforms
• Strong understanding of app UI/UX principles and mobile behavior
• Proficient in using tools like Jira, TestRail, and browser/device simulators
• Knowledge of Agile/Scrum development cycles
• Excellent written and verbal communication skills
• Detail-oriented with strong problem-solving skills

• Familiarity with mobile automation testing tools (e.g., Appium, XCUITest, Espresso)
• Experience working with real devices and device farms
• Experience testing apps with offline capabilities and API integrations

• Work on meaningful mobile tech used by real users
• Flexible and inclusive work culture
• Competitive salary and benefits
• Growth-focused environment with mentorship opportunities