Hiring guide
How to Hire a Mobile App Developer
Native vs cross-platform, where to find mobile app developers or agencies, a feature-build work sample, red flags and how to onboard them.
The short answer
Hiring a Mobile App Developer comes down to verifying swift/swiftui or kotlin/jetpack compose, or flutter (dart) or react native (typescript), app architecture (mvvm, clean architecture) and state management and networking, offline caching and sync before you commit interview time. The process below runs 5 stages, screens on evidence rather than résumé claims, and scores every candidate against the same criteria.
- Watch for: Cannot show an app in a public store or a build you can install, only screenshots
- Watch for: Has never handled an app store rejection and does not know the review guidelines exist
- Score on: Working, readable code in the work sample with offline and error states handled
- Score on: Sound architecture with a clear separation of UI, data and networking
Paste your Mobile App Developer job description; Cohesyve finds, contacts and tests candidates on the real work and ranks them. Ten candidates free, no card.
Applying for a role like this? Practise the assessment free →Before you hire a mobile app developer, decide whether you need native iOS and Android skills or a cross-platform framework such as Flutter or React Native, and whether you want an employee, a freelancer or an agency. Those choices change who you should talk to. This guide covers sourcing, the skills to test, a realistic work sample, red flags and onboarding.
Why this role matters
A mobile app lives on devices you do not control, behind app store reviews you cannot rush. A good mobile developer ships apps that start fast, survive poor connections, handle permissions properly and pass review without drama. A weak hire leaves you with crashes on older devices, rejected submissions and a codebase nobody else wants to touch.
Where to find candidates
- LinkedIn and general tech job boards, searching by platform: Swift and SwiftUI, Kotlin and Jetpack Compose, Flutter or React Native
- Freelance marketplaces such as Toptal and Upwork for project work, checking published apps rather than profile ratings alone
- Clutch, a directory of development agencies with client reviews, if you want an agency to build the first version
- Wellfound and the monthly Hacker News "Who is hiring?" threads for startup-minded developers
- Local iOS, Android, Flutter and React Native meetups and GDG (Google Developer Groups) chapters
- Developers whose published apps you already admire, found through the App Store and Google Play developer pages
Skills to look for
Red flags
- Cannot show an app in a public store or a build you can install, only screenshots
- Has never handled an app store rejection and does not know the review guidelines exist
- Ignores offline states, slow networks and older OS versions when describing their work
- Stores API keys or tokens in plain text in the app bundle
- Agency proposals that fix a price without a written scope or ownership of the source code
- Pushes a cross-platform framework for every project without discussing trade-offs
The interview process
- 1
Portfolio and published-apps review
Install two of their apps. Check launch speed, how they behave offline and on a small screen, and their store reviews. Ask what they personally built in each one.
- 2
Technical conversation
Discuss architecture choices in one of their apps, how they handled state, and how they release and roll back. For an agency, meet the developers who would actually work on your app as well as the sales lead.
- 3
Feature-build work sample
Give a small starter project and ask them to add a screen that loads a list from an API, caches it, shows a sensible offline state and handles an error. Review the code together afterwards. A job simulation of this real feature work is one option if you want a standard task for every candidate.
- 4
Code review and release discussion
Show a short pull request with a memory leak or a main-thread network call and ask them to review it. Then ask how they would ship a hotfix for a crash that only affects one OS version.
- 5
References and contract terms
Ask past clients or managers about crash rates after release, communication and handover. For freelancers and agencies, confirm in writing that you own the code, store accounts and signing keys.
Cohesyve
Start the Mobile App Developer interviews from a ranked shortlist
Cohesyve takes your Mobile App Developer job description, finds and contacts candidates and tests each one on an AI job simulation of the job, so the stages above start with people who have already done the work. Ten candidates free, no card.
How to evaluate
- Working, readable code in the work sample with offline and error states handled
- Sound architecture with a clear separation of UI, data and networking
- Awareness of platform guidelines, permissions and privacy requirements
- Testing habits and a repeatable build and release process
- Quality of their published apps on real devices
- Clear explanation of native versus cross-platform trade-offs for your product
Onboarding
- 1Give access to Apple Developer and Google Play Console accounts held by your company, never personal accounts
- 2Hand over design files, API documentation and analytics or crash-reporting dashboards on day one
- 3Ask them to ship a small bug fix through the full release pipeline in the first fortnight
- 4Agree a device and OS support matrix in writing
- 5Document signing keys, certificates and who controls them
Common questions
Should I hire a native or a cross-platform mobile developer?
Cross-platform frameworks like Flutter and React Native suit apps that need one codebase for iOS and Android. Native development suits apps that lean heavily on device features, platform-specific UI or demanding performance.
Is it better to hire a freelancer, an agency or an employee?
A freelancer or agency can suit a first version with a fixed scope. If the app is core to your business and will change every month, an in-house developer usually pays off over time.
How do I test a mobile app developer if I am not technical?
Install their published apps, ask them to explain their decisions in plain language and use a paid, scoped work sample reviewed by a trusted technical adviser.
What should a mobile developer contract include?
Code ownership, transfer of store accounts and signing keys, a support period after launch and a clear scope of features and devices.
Cohesyve · Skill assessments for hiring
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