DEV-303 Development

Mobile App Testing & Device Strategy

Own mobile quality end to end, from choosing a defensible device matrix to shipping through store review without a rejection. Learners learn exactly where emulators lie, automate gestures and interruption paths on Appium and native frameworks, condition the network to reproduce field failures, and profile startup, memory and battery against explicit budgets. Assessment is a device strategy and test plan defended for a real app.

B4Professional

6modules

44skill atoms

1role journey

Curriculum

What this course covers.

6 modules, 44 named skill atoms. Expand any module to see them.

1Device Strategy & Matrix7 skill atoms

where emulators liecamera GPU and sensor fidelity gapscloud farms on BrowserStack and Sauce Labsanalytics-driven device selectionOS version and screen density bucketsOEM skin quirks on Samsung and Xiaomilong-tail cut-off and refresh cadence

2Automation on Appium, Espresso & XCUITest7 skill atoms

UiAutomator2 and XCUITest driversaccessibility id over brittle XPathgesture automation swipe pinch and long-pressWebView and hybrid context switchingapp state reset between testsEspresso idling resourcesparallel execution across devices

3Interruptions & Field Conditions7 skill atoms

incoming call and notification interruptsbackgrounding and process deathruntime permission dialog pathsoffline and airplane mode behaviour2G latency and packet loss profilessync conflict on reconnectrotation and multi-window resize

4Performance, Battery & Memory7 skill atoms

cold warm and hot start budgetsjank and dropped frame measurementAndroid Profiler and Xcode Instrumentsmemory leaks and OOM killswakelocks and background battery drainAPK and IPA size budgetsANR rate and crash-free sessions

5Store Readiness & Mobile Accessibility7 skill atoms

Google Play pre-launch report findingsTestFlight and App Store review rejection causescrash and ANR thresholds for releaseTalkBack and VoiceOver walkthroughstouch target size and contrast ratiosdynamic type and font scalingAccessibility Scanner and Xcode audit

6AI in Mobile Testing9 skill atoms

generated Appium flows and selector driftself-healing locators and their silent-pass risk across OEM skinshealing logs reviewed, not trustedaccessibility-id contracts as the durable fixvisual diffing over densities and localescrash cluster triage with modelsgenerated suites missing interrupt and permission pathsmaintaining a generated mobile suitedevice-farm cost blowouts from bulk generated runs

Where it fits

DEV-303 in a role journey.

This course appears in 1 of our 45 role journeys. Here is what a learner takes immediately before and after it in each.

Mobile Developer

Professional stage

DEV-224→DEV-303→DEV-502

Roles this course serves

Mobile Developer

The capability ladder

This course is authored to band B4.

Every course we run is written to one rung of the CASI ladder, so a plan can be assembled to take a team from where they are to where they need to be.

What do B1–B6 mean?The CASI Capability Ladder — click to expand

Every course targets a band on the CASI Capability Ladder — our six-band proficiency scale, anchored to open standards (O*NET, ESCO, NICE, NIST AI RMF, Bloom's). A band tells you how deep a course goes, and what evidence proves it.

What the learner can doTypical evidence

AwareUnderstands concepts and vocabulary; uses tools with guidance

Knowledge checks

FoundationPerforms standard tasks correctly in familiar contexts

Guided labs, autograded exercises

PractitionerDelivers complete pieces of work independently

Scenario labs, proctored hands-on exams

ProfessionalHandles production-grade complexity, trade-offs and failure modes

Break-fix drills, design defenses

AdvancedEngineers systems end-to-end under constraints; leads others

Rubric-scored capstones, vivas

ExpertSets direction; recognised authority across teams

Portfolio + panel evaluation

A note on B6. Courses in this catalog target B1–B5. B6 is not taught — it is recognised, through a portfolio and a panel, once someone is setting direction for others. Every journey here is built to land a learner at B5.

Other Development courses at this level.

DEV-202

Run DEV-303 for your team.

This course runs at several lengths depending on how deep you need to go and how much of it your people already have. Tell us who is being trained and we will scope it.

Add it to a training plan Talk to our team Check your team’s level free

Mobile App Testing & Device Strategy

What this course covers.

DEV-303 in a role journey.

Mobile Developer

Roles this course serves

This course is authored to band B4.

Other Development courses at this level.

Advanced Java: Concurrency, JVM & Performance

Java Microservices with Spring Cloud

Software Architecture & Design Patterns

Advanced React & Frontend Architecture

Node.js Backend Engineering at Scale

Mobile Release Engineering & Store Operations

Run DEV-303 for your team.