WhatsApp
Flutter
React Native
Swift
Kotlin
FirebaseWhy hire Mobile App Developers through us
- Vetted engineers — technical screening and a practical exercise before you see a profile
- You interview and choose; nobody joins without your approval
- Working hours overlap with your team, with clear daily communication
- NDA and full IP assignment to your company
- Monthly terms with a trial period and free replacement if the fit is wrong
Roles and seniority
| Level | What they do |
|---|---|
| Mid-level | Builds screens, features and API integration |
| Senior | Owns app architecture, performance and releases |
| Lead | Sets mobile strategy, CI/CD and store processes |
Skills matrix
Ways to engage
| Model | How it works | Best for |
|---|---|---|
| Full-time dedicated | One engineer, 40 hours a week on your work | Ongoing product development |
| Part-time | 20 hours a week | Maintenance and smaller roadmaps |
| Team | Several engineers with a lead | New products and workstreams |
Rates depend on seniority and engagement length. Share your requirements and you will receive a written rate card within one business day. See also staff augmentation and dedicated teams.
What a great mobile app developer looks like
Strong mobile developers understand the realities of phones: unreliable networks, limited memory and battery, different screen sizes and app store rules. They build apps that start fast, work offline where needed and handle permissions and notifications respectfully. Whether native or cross-platform, they know platform conventions, can write native code when a plugin falls short, and manage releases through TestFlight and Google Play testing tracks with crash monitoring in place.
Questions we ask in technical interviews
Every candidate is assessed on fundamentals and on judgement. Typical topics include:
- How would you implement offline data with later synchronisation?
- How do you reduce app startup time?
- How do you handle push notification permissions to maximise opt-in?
- When would you write a native module in a Flutter or React Native app?
- How do you manage releases and phased rollouts across both stores?
Typical projects for mobile app developers
- Building a new app for iOS and Android with Flutter or React Native
- Adding features to an existing native app
- Upgrading an outdated React Native or Flutter app
- Integrating payments, maps, Bluetooth or health data
- Improving app performance, crash rates and store ratings
We help you decide between native and cross-platform skills before hiring, so you build the right team for your app.
What mobile developers work on after launch
Hiring for a mobile app is not only about the first release. Once an app is live, most of the work is keeping it healthy: supporting new iOS and Android versions each year, updating SDKs and dependencies, watching crash reports, improving start-up time and responding to app store policy changes. A developer who has maintained an app through several release cycles brings habits that prevent emergencies — feature flags, staged rollouts, analytics on key flows and a clean release checklist.
When you scope the role, include this ongoing work. A developer hired only to “build the app” may be the wrong fit for the steady improvement most products need afterwards.
Engagement options for mobile work
| Need | Typical setup | Notes |
|---|---|---|
| New app from scratch | Mobile developer plus designer, back-end and QA support | A single developer rarely covers design and API work well |
| Adding features to a live app | One or two mobile developers in your team | Works well when you already have a product owner |
| Taking over an existing app | Senior developer for an initial code and release audit | Start with the build pipeline and crash reports |
| Ongoing maintenance | Part-time or shared developer with a monthly plan | Covers OS updates, dependencies and small fixes |
Red flags when hiring mobile developers
- Has never shipped an app through App Store or Google Play review themselves
- Unfamiliar with how the app behaves offline or on slow networks
- No experience reading crash reports or performance traces
- Tests only on the latest phones and simulators
- Cannot explain how they would handle a breaking change in a new OS version
Tools a mobile developer should be comfortable with
For whole projects rather than individual hires, see mobile app development and mobile app maintenance.
Working well with a remote mobile developer
Mobile work has a few coordination points that remote teams should plan for. App store review can take anywhere from hours to days, so releases need to be scheduled with that in mind rather than promised for a specific hour. Designers and developers should agree on how screens behave on small phones, large phones and tablets before work starts, not after the first build.
- Share test builds through TestFlight or Play internal testing every sprint
- Keep one shared release checklist covering versioning, screenshots and release notes
- Agree who owns the App Store and Play Console accounts — always the client
- Record short screen videos when reporting bugs, including the device and OS version
Cross-platform or native skills?
If your app is built in Flutter or React Native, hire for that framework first, but look for someone who can also read and fix native Swift or Kotlin code. Payment SDKs, push notifications, background tasks and device features sometimes need small native changes, and a developer who can handle them avoids waiting on a separate specialist.
Onboarding timeline
-
RequestDay 1
You share the role, skills and start date.
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ProfilesWithin 48 hours
Shortlisted candidates with relevant experience.
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InterviewsDays 3–5
You interview and select.
-
StartWeek 2
Access, onboarding and first tasks in your tools.
Prefer a managed project instead of hiring? See our services.
Need a different skill set? See every role on Hire Software Developers.