QA Engineer (Manual, Mobile)

LITSLINK is looking for a QA Engineer (Manual) to join a long-term project focused on building a -first secure mobile messenger. You will work on a complex product with a strong focus on security, real-time communication, and multi-device consistency, where QA is an integral part of the development process.

Project Secure mobile messenger (iOS & Android) End-to-end encryption by default Multi-device support Real-time messaging and calls On-device AI features

Format Remote Part-time (≈20h/week) Long-term

Responsibilities Perform manual testing of mobile applications (iOS & Android) Validate critical flows: authentication, messaging, calls, multi-device sync Test real-time features under different network conditions Identify edge cases and нестандартні сценарії Perform API testing and basic network inspection Participate in regression testing before releases Collaborate with QA Lead and engineers

Requirements 3+ years of experience in mobile QA (iOS & Android) Experience testing complex mobile applications Experience with API testing (REST, Postman) Experience with network tools (Charles / proxy) Experience testing real-time features (chat / sync / notifications) Strong attention to detail and analytical thinking Upper-Intermediate+ English

Nice to have Experience with WebRTC / VoIP testing Understanding of security / encryption basics Experience with messaging / fintech / security products Experience with real devices testing Basic understanding of test automation

Why join Work on a security-focused product Complex real-time system, not just UI testing Opportunity to grow in security and mobile domain Flexible part-time format