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DEV-223 Development

Cross-Platform Mobile with Flutter & React Native

Decide honestly whether cross-platform fits a product, then build competently in both major frameworks. Learners compare the Flutter and React Native execution models, reach native capability through channels and native modules, and measure where cross-platform performance and platform parity actually diverge from native.

B3Practitioner
6modules
42skill atoms
1role journey
Curriculum

What this course covers.

6 modules, 42 named skill atoms. Expand any module to see them.

1Choosing Cross-Platform Honestly7 skill atoms
capability coverage auditplugin ecosystem maturityteam skill realitynative escape hatcheslong-run maintenance costcases where native winswriting the decision record
2Flutter Widget Model7 skill atoms
stateless vs stateful widgetsbuild method and element treesetstate vs riverpod and bloclayout constraints and render objectsdart isolates for heavy workhot reload limitsplatform-adaptive widgets
3React Native Component Model7 skill atoms
component tree to native viewsfabric and turbomoduleshermes engine behaviourflexbox layout differencesexpo vs bare workflowreanimated for gesturesmetro bundler configuration
4Shared State & Platform Channels7 skill atoms
state container choices across platformsmethod channels in flutternative modules in react nativeserialization cost at the boundarysensor and permission accessbackground execution differenceserror handling across the boundary
5Performance & Release Parity7 skill atoms
jank from boundary chatterlist virtualization behaviourstartup time and app sizeframe timing with devtools and flipperplatform-specific ui divergencefeature parity between storestesting on low-end devices
6AI Assistants in Cross-Platform Work7 skill atoms
snippets mixing flutter major versionsreact native answers from the pre-fabric eraconfident but wrong plugin recommendationsgenerated code ignoring platform differencesreviewing generated channel and bridge codedependency versions that do not resolveengineer owns parity claims
Where it fits

DEV-223 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

Practitioner stage
DEV-222DEV-223DEV-224

Roles this course serves

The capability ladder

This course is authored to band B3.

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
B1
AwareUnderstands concepts and vocabulary; uses tools with guidance
Knowledge checks
B2
FoundationPerforms standard tasks correctly in familiar contexts
Guided labs, autograded exercises
B3
PractitionerDelivers complete pieces of work independently
Scenario labs, proctored hands-on exams
B4
ProfessionalHandles production-grade complexity, trade-offs and failure modes
Break-fix drills, design defenses
B5
AdvancedEngineers systems end-to-end under constraints; leads others
Rubric-scored capstones, vivas
B6
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.

Next step

Run DEV-223 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