Prove your mobile development skills
Mobile work is more than one language: networks drop, devices vary and app stores have rules. Lemma records how you handle all of it through live sessions, adaptive assessments and connected code.
What mobile development competence looks like
A competent mobile developer designs for bad conditions. The app keeps working on a weak connection, caches what it needs, and syncs without losing data. They handle permissions politely, respect battery and memory limits, and test on more than the newest phone.
They also understand the platform around the code: app lifecycle and background work, push notifications, deep links, accessibility settings, and the release process with signing and review. Whether they work natively or cross-platform, they can explain the trade-off and when each approach stops fitting.
App feature build in a live session
60 min · Learning · with Marco V.
Marco V. rated the session
Practitioner · after the call
Clear reasoning on offline and sync. Talked through trade-offs first.
Offline and sync
Local storage, caching, conflict handling and syncing when the connection returns.
App lifecycle
Background work, state restoration and handling interruptions without losing the user's place.
Native versus cross-platform
Choosing between native and shared-code frameworks based on the product's real needs.
Performance on device
Smooth scrolling, startup time, memory use and battery impact on a range of devices.
Accessibility
Screen readers, dynamic text sizes, contrast and touch targets on both major platforms.
Release and distribution
Signing, store review guidelines, staged rollouts and handling crash reports after release.
What counts as evidence of mobile development skills?
An app store link does not say who built what. Lemma records mobile development evidence that does: sessions with another developer, an adaptive test and repositories linked from your own account. Each entry below shows its source. See the evidence methodology for how each source is weighed.
Mobile development
Yusuf D. · SCI recomputed 9 Oct
Evidence · 4 entries
- Rated 5.0
App feature build in a live session
Live session · 9 Oct
- Level 7.2
Adaptive mobile development assessment
Adaptive assessment · 2 Oct
- Verified
A mobile app repository on GitHub
GitHub connector · 24 Sep
- Taught · 1.5x
Teaching a mobile topic
Live session · 11 Sep
App feature build in a live session
Build or debug a mobile feature, such as offline caching, with a practitioner. They rate how you reason about lifecycle, network failure and device limits.
Adaptive mobile development assessment
Scenarios test offline strategy, lifecycle handling and performance choices. A sync loses data when the app is backgrounded: you choose the cause from the options.
A mobile app repository on GitHub
Connect the repository behind an iOS, Android or cross-platform app. Lemma checks it exists and that you have access to it.
Teaching a mobile topic
Teach someone how to handle background work or push notifications. Teaching sessions count for more than learning ones in your record.
How is a mobile development skills test run on Lemma?
The mobile development test adapts as you go, between 15 and 25 questions on device, lifecycle and offline problems, getting harder while you answer correctly. Together with sessions and linked work it sets your mobile development SCI, where older evidence slowly counts for less.
Notes typed offline vanish if the app is backgrounded before sync. What is the most likely cause?
- ASync runs on the main thread
- BThe API rejects offline timestamps
- CEdits live in memory and are never persisted
- DPush notifications are disabled
Build a feature with a practitioner
In a live session, you work on a mobile feature under realistic constraints such as a dropped connection or a backgrounded app. The practitioner rates how you handle the edge cases.
Take the adaptive assessment
Questions adapt to your level and span offline behaviour, lifecycle, performance, accessibility and release. Harder scenarios count for more, with a time limit on each.
Connect the app's code
Link your mobile repositories through GitHub. Pair this skill with Swift or Kotlin evidence to show both platform judgement and language depth.
Mobile development skills: common questions
How do I become a mobile developer and prove it to employers?
Is cross-platform experience valued as much as native?
What mobile development skills are hardest to show in a portfolio?
How is mobile development different from Swift or Kotlin on Lemma?
Skills related to mobile development
Browse the skills directorySwift
Show how you build iOS apps in Swift and SwiftUI, from state to concurrency.
Evidence for SwiftKotlin
Evidence for idiomatic Kotlin, coroutines and Android development, recorded from real work.
Evidence for KotlinReact
Show how you structure components, manage state and keep renders fast, with evidence behind it.
Evidence for ReactUI/UX design
Show that your interfaces are usable, accessible and consistent, not just attractive.
Evidence for UI/UX design
Start your mobile development evidence record.
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