Manual QA Engineer Mobile App Europe

Overview

A large-scale consumer mobile application with millions of active users required a robust testing strategy to ensure stability, performance, and seamless user experience. Testing efforts focused on both iOS and Android platforms, covering functional validation, UI/UX consistency, geolocation features, and real-time interactions.

Own end-to-end QA within a sprint: create test strategies/plans, define scope & priority, estimate effort, track progress, unblock issues, and ensure on-time, high-quality releases.

Plan and execute test cycles across feature, integration, regression, and release certification (Test Flight/Internal App Sharing/production).

Author clear, reproducible defects with videos, logs, and device metadata; drive root cause and follow-through to resolution.

Partner with developers & PMs to clarify requirements/acceptance criteria, risks, and success metrics.

Network-aware testing (airplane mode, 2G/3G throttling, packet loss) using proxies and emulator/simulator tools.

Release readiness: build verification, smoke suites, sanity checks; participate in bug triage, go/no-go, and post-mortems.

Automation-aware: convert high-priority manual scenarios into actionable automation tickets; collaborate with SDETs on monthly audits and coverage plans.

Lead release-team testathons for major feature launches: plan charters, coordinate cross-functional participants, track findings, and publish results.

Work closely with the automation team on weekly release regression cycles: align scope, review flaky tests, and prioritize automation candidates from recent escapes.

Hands-on memory profiling using Xcode Instruments and Android Studio Profiler
; detect leaks/retention, analyze heap/allocations, and file actionable performance bugs with traces.

Be metrics-oriented and deliver weekly Quality Release Reports to the Release Manager (coverage & pass rate, defect density/age/SLA, crash-free users, ANR rate, cold-start time, flakiness, known risks).

4+ years of hands-on QA for iOS and Android consumer apps (feature, integration, regression, release testing).

Strong understanding of SDLC and mobile release trains (feature flags, build types, staged rollouts, crash & analytics tooling).

Clear, proactive communication
—align with developers and product on requirements, test plans, and test strategies without supervision
.

Proven end-to-end ownership of sprint QA (scope/priorities, daily progress, blockers, timely sign-off).

Testing on real devices and emulators/simulators
; coverage across OS versions, screen sizes, locales, accessibility setups.

Tooling:
Xcode (logs, profiling),
Android Studio/ADB
, Charles Proxy or Fiddler
, Jira
, .

Manual REST API testing (Postman/Insomnia) and solid grasp of client–server interactions (headers, auth, caching).

Excellent written/spoken English, crisp test docs and defect reports.

Accessibility testing to WCAG 2.1 AA (Voice Over/Talk Back, color/contrast, semantics).

Experience with
IAP/subscriptions
, push notifications, deep links, geo features.

Familiarity with crash/analytics stacks (Firebase, Datadog, Amplitude, Mixpanel, Sentry, Crashlytics).

Exposure to mobile automation (XCUITest/Espresso/Maestro) and creating high-value automation backlog.

Client-side performance profiling (startup time, memory, jank) and battery/network sensitivity checks.