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Hire Mobile App Developers Who Ship to Stores

Add vetted iOS, Android and cross-platform engineers to your team on a monthly basis, with a trial period, NDA and full code ownership.

Book a free consultationWhat they do

Mobile engineers who fit your roadmap, not just a job description

Hiring mobile developers in-house takes months, and a single wrong hire can stall a release. Nexzem gives you dedicated app developers who already know store review rules, push notification quirks, offline sync and crash triage. You pick the platform mix, native or cross-platform, and the seniority, and the developer works in your sprint, your repo and your standups.

Founders use us to get a first release out, product teams use us to clear a feature backlog, and agencies use us to absorb overflow. Our Dehradun team has delivered 150+ projects for 250+ clients, so we match developers by the kind of app you are building, whether that is a marketplace, a fintech wallet, a booking app or an internal field tool.

Ship one release to both stores

Step a sample build from release to live on the App Store and Google Play, the part of the job most teams underestimate.

Build a team with Mobile App Developers

Pick roles and seniority, choose what they will work on, then send the brief. We come back with matching profiles.

Mobile App Developers, by seniority
  • Junior Mobile App Developer
    0
  • Mid-level Mobile App Developer
    1
  • Senior Mobile App Developer
    1
Round out the team
  • iOS Developer
    0
  • Android Developer
    0
  • Flutter Developer
    0
What they will work on

What our Mobile App Developers can do for you

Vetted iOS, Android and cross-platform app developers who join your team monthly, with a trial period.

  1. 01

    Native iOS and Android apps

    Swift and Kotlin developers who build fully native apps with platform UI patterns, background tasks, widgets and the device APIs your product depends on.

  2. 02

    Cross-platform apps

    Flutter and React Native engineers who ship one codebase to both stores while keeping native modules for camera, payments, maps and biometrics where needed.

  3. 03

    MVPs and first releases

    Developers who turn a Figma prototype into a store-ready MVP, set up analytics and crash reporting, and handle the submission checklist for both stores.

  4. 04

    API and backend integration

    Connecting your app to REST or GraphQL APIs, Firebase, payment gateways like Razorpay and Stripe, and third-party SDKs with proper error and retry handling.

  5. 05

    Offline sync and performance

    Local storage, background sync, image caching and startup time tuning so the app stays usable on slow networks and older Android devices.

  6. 06

    Maintenance and OS upgrades

    Keeping existing apps current with each iOS and Android release, fixing crashes from production logs, and updating deprecated libraries before they break builds.

Why hire Mobile App Developers through Nexzem

  • Screened for real app work

    Every developer clears a code review and a practical task built around shipping, debugging and publishing apps, not just algorithm puzzles.

  • Trial period before you commit

    Start with a short trial. If the developer is not the right fit, you stop or we swap them without a long contract.

  • Working hours that overlap yours

    Developers shift their day to share standups and review time with teams in the US, UK, Europe, Middle East and Australia.

  • Replacement at no extra cost

    If someone leaves or is not working out, we bring in a matched replacement and handle the knowledge transfer.

  • Your code, your IP

    You own 100% of the source code, store accounts and signing keys. We sign an NDA before any project details are shared.

How to vet a mobile app developer

Start with apps the developer has actually shipped and can talk about in detail. Ask them to walk through one: the architecture they chose, how they handled offline use, what their crash rate looked like after launch and how they dealt with store review feedback. Developers who built real products describe trade-offs and mistakes; developers who only followed tutorials describe features and screens. Our guides to native app development and cross-platform app development outline the trade-offs a candidate should be able to discuss.

A short practical exercise built around a realistic task, such as adding offline support to an existing screen or fixing a slow list, reveals more than abstract puzzles. Review the code together afterward and ask why they made each choice. How a developer explains decisions, accepts feedback and handles uncertainty matters as much as the code itself, because they will work inside your team every day.

  • Published apps they can discuss honestly, including what went wrong.
  • Understanding of app lifecycle, background limits and permissions on both platforms.
  • Testing habits: unit tests, UI tests and real-device checks.
  • Experience profiling performance, memory and battery use.
  • Clear communication about estimates, risks and trade-offs.

Interview questions we use for mobile developers

Our technical interviews focus on situations developers meet in production rather than trivia. We ask candidates to reason aloud, sketch designs and refer to apps they have built, and we look for depth on at least one platform plus awareness of how the other behaves differently.

  • How would you design offline sync for a form users fill in without a network connection?
  • What happens when a push notification arrives while the app is terminated, on iOS and on Android?
  • How do you find and fix janky scrolling or a memory leak?
  • How do you handle API changes when old app versions stay installed for months?
  • Where and how do you store authentication tokens securely on a device?
  • Describe an app store rejection you dealt with and what you changed.

Onboarding a dedicated mobile developer in the first two weeks

In the first week, the developer gets access to repositories, CI, design files and the store consoles they need, with permissions limited to their role. They build and run the app locally on real devices, read architecture notes and recent pull requests, join stand-ups and planning, and fix one or two small bugs to learn the codebase and review process.

In the second week, they take ownership of a small feature end to end: design review, implementation, tests, code review and delivery to TestFlight or Google Play internal testing. At the end of week two, the team lead and developer review what went well, what slowed them down and which parts of the app they should own next, so the ramp-up continues deliberately. If you are still sizing the work, the app cost calculator gives a starting estimate.

Hiring Mobile App Developers: from first call to first commit

Every stage has an owner and an exit, so you always know where your hire stands.

  1. Stage 1

    Share your app needs

    Tell us the platforms, current stack, release goals and seniority you need. We reply within 24 hours with questions or a call slot.

  2. Stage 2

    Review matched profiles

    We send profiles of developers who have shipped similar apps, with store links and notes on the modules they built.

  3. Stage 3

    Interview and test

    You interview shortlisted developers and can give a small paid task on your own codebase before deciding.

  4. Stage 4

    Onboard to your tools

    The developer gets access to your repo, Jira or Linear, Slack and test devices, and joins your sprint cadence.

  5. Stage 5

    Start the trial and scale

    Work begins on a trial basis. After it, you continue monthly and add or reduce developers as the roadmap changes.

Where Mobile App Developers make a difference

  • First app for a funded startup

    A startup without in-house mobile engineers adds a dedicated developer who builds the first iOS and Android release, sets up CI and crash reporting, and documents decisions so future hires can pick up the work easily.

  • Adding a mobile channel for an enterprise

    An enterprise with strong web and backend teams brings in mobile specialists to build its customer app against existing APIs, working in the same sprints and code review process as internal engineers.

  • Stabilizing a crash-prone app

    A company whose app suffers poor ratings brings in an experienced developer to analyze crash reports, fix the most common failures, add automated tests and set up monitoring before new features resume.

  • Extra capacity before a launch

    A product team facing a fixed launch date adds two mobile developers for several months to clear the feature backlog, then scales back to one developer for maintenance after release.

Tools our Mobile App Developers work with

Proven, well-supported tools chosen for your scale, budget and team, never for novelty.

  • Swift
  • Kotlin
  • Flutter
  • React
  • Firebase
  • iOS
  • Android
  • Appium

Developers who work alongside Mobile App Developers

All 46 developer roles

More in Mobile

Hiring Mobile App Developers: FAQs

Something else on your mind? Ask a consultant and get a reply within one business day.

How much does it cost to hire a mobile app developer?

Engagement is monthly per developer, with a short trial period at the start. The rate depends on seniority, native versus cross-platform skills, and whether you need full-time or part-time hours. We share a fixed monthly quote after a free consultation.

Should I hire native or cross-platform developers?

Native Swift and Kotlin suit apps that lean heavily on device hardware, complex animation or platform-specific features. Flutter or React Native suit most business apps that need both stores on one budget. We will recommend a mix after reviewing your feature list.

How quickly can a developer start?

Once you approve a profile and the interview, onboarding usually takes a few working days for access, NDA and setup. Exact start dates depend on the developer's current notice and your tooling.

Who owns the app code and store accounts?

You do. All source code, design assets, signing certificates and App Store or Play Console accounts belong to you, and we sign an NDA on request before any details are shared.

Can the developer also handle app store submission?

Yes. Our developers prepare builds, screenshots, privacy declarations and review notes, and handle rejections from Apple or Google until the app is live.

How do you check a mobile developer's code quality before we commit?

You can review code samples and the results of a practical exercise, and interview the developer yourself. During the first weeks, your team reviews every pull request, which gives a clear picture of code quality, testing habits and communication before any longer commitment.

Can a dedicated developer join our existing sprint process?

Yes. Dedicated developers work in your tools and rituals: your issue tracker, repositories, stand-ups, planning and retrospectives. They follow your coding standards and review process, so for day-to-day purposes they behave like members of your own team.

We work with clients across the USA, UK, Australia, UAE, New Zealand and India.

Where we work

Tell us who you need on your team.

Share the role, stack and start date. We reply within one business day with matching profiles and next steps.

Book a free consultation+91-7302622997