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Enterprise Mobile App Development
What You Can Build With Mobile Developers
Hire mobile developers to solve the gap between a product vision and a production application that passes App Store review and earns user trust. These are systems where a single crash report can trigger a 1-star review storm, and a rejected build costs your team two weeks and a product launch. Our developers integrate with your existing team to deliver mobile products that perform, comply, and scale.
Cross-Platform Apps With Shared Codebase
Build a single codebase that delivers near-native performance on both iOS and Android when maintaining two separate native codebases would consume your entire engineering budget. Your current approach of one platform first and the other later creates feature parity debt that compounds every sprint. We architect React Native or Flutter solutions using shared business logic layers while keeping platform-specific UI components where performance demands it. One team. Two stores. Our clients ship cross-platform apps with 60fps scroll performance and under 1-second cold start times.
Tech Stack:
Outcome
Single codebase | Both stores simultaneously | 40% faster time to marketNative iOS Applications for the App Store
Build App Store applications where the experience has to feel native or users will uninstall within the first session. Premium iOS users have low tolerance for interface lag or animations that stutter on ProMotion displays. We develop with Swift and SwiftUI, implement proper memory management, handle App Store review guidelines end to end, and configure push notification infrastructure from APNs through to delivery receipts. The review process does not surprise us.
Tech Stack:
Outcome
App Store approved first submission | 4.5+ rating trajectory | Sub-200ms UI responseNative Android Applications for Google Play
Build Android applications that perform consistently across the fragmented device ecosystem, from flagship Pixels to mid-range devices representing 60% of your actual user base. Android fragmentation is not a talking point: it is a real QA challenge that requires structured testing across API levels and screen densities. We develop with Kotlin and Jetpack Compose, implement the Android lifecycle correctly, and configure ProGuard and R8 obfuscation for production builds. No memory leaks in your production ANR reports.
Tech Stack:
Outcome
Crash-free rate 99.5%+ | Supports Android 8.0 through Android 15 | Play Store compliantHIPAA-Compliant Healthcare Mobile Apps
Build patient-facing or clinician-facing apps where a data breach means regulatory penalty, not just customer churn. Healthcare apps must handle PHI with AES-256 encryption at rest, TLS 1.3 in transit, and audit logs for every data access event. We implement certificate pinning, biometric authentication fallbacks, and session timeout policies that satisfy HIPAA Security Rule requirements. Compliance is not an afterthought we add at the end.
Tech Stack:
Outcome
HIPAA audit ready | PHI encrypted end to end | App Store Medical category compliantFintech Mobile Apps With PCI-DSS Compliance
Build payment, investment, or banking applications where a security vulnerability is a regulatory event, not a bug ticket. Fintech mobile apps handle card data, account credentials, and transaction histories that require PCI-DSS scope management at the architecture level. We implement tokenization via Stripe or Braintree SDKs, configure jailbreak and root detection, implement secure enclave storage for credentials, and design session management that satisfies SOC 2 Type II control requirements.
Tech Stack:
Outcome
PCI-DSS scoped architecture | SOC 2 control coverage | Zero security incidents in productionLegacy Mobile App Modernization
Modernize Objective-C or Java Android applications that have accumulated years of technical debt while keeping the features your users depend on working throughout the migration. The risk in legacy mobile modernization is not the rewrite itself: it is the regression you introduce when feature parity assumptions break. We use incremental migration patterns, converting Objective-C modules to Swift one framework at a time using interoperability bridges, and Java Android code to Kotlin using the strangler fig pattern. Nothing breaks on day one.
Tech Stack:
Outcome
Zero-downtime migration | Test coverage maintained at 80%+ throughout | No forced updatesReal-Time Consumer Apps and Live Features
Build consumer applications where real-time feeds, live scores, collaborative editing, or instant messaging are core product features that determine retention. Real-time on mobile is harder than on web: you must handle connection drops, background state transitions, and push notification delivery gaps without data loss. We implement WebSocket connection management with reconnection backoff, offline queue patterns for message durability, and optimistic UI updates that reconcile on reconnection.
Tech Stack:
Outcome
Sub-200ms message delivery | Offline queue durability | 99.9% message delivery rateEnterprise Field-Service and Internal Tools
Build internal mobile applications for field technicians, warehouse staff, or sales teams where the device is a Samsung Galaxy in airplane mode on a factory floor, not an iPhone with full Wi-Fi connectivity. Enterprise internal apps have different constraints than consumer apps: MDM enrollment, SSO authentication, offline data sync, and barcode scanning. We configure Microsoft Intune or VMware Workspace ONE integration, implement SAML 2.0 or OAuth 2.0 for corporate identity, and design sync engines that queue operations when offline and reconcile on reconnect.
Tech Stack:
Outcome
100% MDM enrolled | Offline-first sync | SSO connected to corporate identity in week 1Build a single codebase that delivers near-native performance on both iOS and Android when maintaining two separate native codebases would consume your entire engineering budget. Your current approach of one platform first and the other later creates feature parity debt that compounds every sprint. We architect React Native or Flutter solutions using shared business logic layers while keeping platform-specific UI components where performance demands it. One team. Two stores. Our clients ship cross-platform apps with 60fps scroll performance and under 1-second cold start times.
Tech Stack:
Outcome
Single codebase | Both stores simultaneously | 40% faster time to marketBuild App Store applications where the experience has to feel native or users will uninstall within the first session. Premium iOS users have low tolerance for interface lag or animations that stutter on ProMotion displays. We develop with Swift and SwiftUI, implement proper memory management, handle App Store review guidelines end to end, and configure push notification infrastructure from APNs through to delivery receipts. The review process does not surprise us.
Tech Stack:
Outcome
App Store approved first submission | 4.5+ rating trajectory | Sub-200ms UI responseBuild Android applications that perform consistently across the fragmented device ecosystem, from flagship Pixels to mid-range devices representing 60% of your actual user base. Android fragmentation is not a talking point: it is a real QA challenge that requires structured testing across API levels and screen densities. We develop with Kotlin and Jetpack Compose, implement the Android lifecycle correctly, and configure ProGuard and R8 obfuscation for production builds. No memory leaks in your production ANR reports.
Tech Stack:
Outcome
Crash-free rate 99.5%+ | Supports Android 8.0 through Android 15 | Play Store compliantBuild patient-facing or clinician-facing apps where a data breach means regulatory penalty, not just customer churn. Healthcare apps must handle PHI with AES-256 encryption at rest, TLS 1.3 in transit, and audit logs for every data access event. We implement certificate pinning, biometric authentication fallbacks, and session timeout policies that satisfy HIPAA Security Rule requirements. Compliance is not an afterthought we add at the end.
Tech Stack:
Outcome
HIPAA audit ready | PHI encrypted end to end | App Store Medical category compliantBuild payment, investment, or banking applications where a security vulnerability is a regulatory event, not a bug ticket. Fintech mobile apps handle card data, account credentials, and transaction histories that require PCI-DSS scope management at the architecture level. We implement tokenization via Stripe or Braintree SDKs, configure jailbreak and root detection, implement secure enclave storage for credentials, and design session management that satisfies SOC 2 Type II control requirements.
Tech Stack:
Outcome
PCI-DSS scoped architecture | SOC 2 control coverage | Zero security incidents in productionModernize Objective-C or Java Android applications that have accumulated years of technical debt while keeping the features your users depend on working throughout the migration. The risk in legacy mobile modernization is not the rewrite itself: it is the regression you introduce when feature parity assumptions break. We use incremental migration patterns, converting Objective-C modules to Swift one framework at a time using interoperability bridges, and Java Android code to Kotlin using the strangler fig pattern. Nothing breaks on day one.
Tech Stack:
Outcome
Zero-downtime migration | Test coverage maintained at 80%+ throughout | No forced updatesBuild consumer applications where real-time feeds, live scores, collaborative editing, or instant messaging are core product features that determine retention. Real-time on mobile is harder than on web: you must handle connection drops, background state transitions, and push notification delivery gaps without data loss. We implement WebSocket connection management with reconnection backoff, offline queue patterns for message durability, and optimistic UI updates that reconcile on reconnection.
Tech Stack:
Outcome
Sub-200ms message delivery | Offline queue durability | 99.9% message delivery rateBuild internal mobile applications for field technicians, warehouse staff, or sales teams where the device is a Samsung Galaxy in airplane mode on a factory floor, not an iPhone with full Wi-Fi connectivity. Enterprise internal apps have different constraints than consumer apps: MDM enrollment, SSO authentication, offline data sync, and barcode scanning. We configure Microsoft Intune or VMware Workspace ONE integration, implement SAML 2.0 or OAuth 2.0 for corporate identity, and design sync engines that queue operations when offline and reconcile on reconnect.
Tech Stack:
Outcome
100% MDM enrolled | Offline-first sync | SSO connected to corporate identity in week 1Do You Know
Developers spend an average 32% of their week in meetings. At a 40-hour week, that is 12.8 hours of non-coding time per developer.
Atlassian 2024 Developer Report
Developer Capabilities
TECHNICAL EXPERTISE
Our mobile developers average 7.8 years of experience. Production mobile apps deployed in at least two domains: healthcare, fintech, e-commerce, or enterprise tools. Every developer is vetted for App Store lifecycle knowledge and debugging under memory pressure, not just syntax proficiency.
iOS Development: Swift, SwiftUI, and UIKit
Modern iOS development requires more than knowing Swift: it requires understanding memory ownership, view hierarchy rendering, and the SwiftUI/UIKit interoperability layer that most apps still need. Our iOS developers implement Combine-based reactive data flows, configure Background App Refresh for fitness or news apps, and manage Core Data migration paths that do not corrupt user data on upgrade. App Store review experience is non-negotiable. They have shipped apps through review, handled rejection appeals, and managed phased rollouts.
Android Development: Kotlin, Jetpack Compose, and Coroutines
Kotlin coroutines changed how Android developers handle concurrency, and developers who have not internalized structured concurrency still write code that leaks background threads. Our Android developers implement Flow-based reactive patterns, use Jetpack Compose for declarative UI that performs on mid-range devices, and configure WorkManager for reliable background tasks that survive process death. Proguard and R8 configuration is not an afterthought.
Cross-Platform: React Native and Flutter
React Native's new architecture (JSI, Fabric, and TurboModules) eliminated most of the performance gap with native, but only developers who understand how the bridge works can debug the cases where it still matters. Our React Native developers write efficient native modules, configure Hermes for JavaScript execution on low-end Android, and use Reanimated 3 for 60fps animations that do not block the JS thread. Our Flutter developers understand widget rebuild optimization and use Riverpod or Bloc for state management that scales past a single developer.
Backend Integration and API Connectivity
Mobile apps fail when their API contract assumptions break in production: null fields, 30-second timeouts, or pagination that skips records under load. Our mobile developers design API consumption defensively: they implement exponential backoff, handle partial response failures gracefully, and version API clients so backend changes do not force App Store updates. GraphQL, REST, and gRPC: they work with all three and know which to use when.
Mobile Security, Auth, and Compliance
Jailbreak detection, certificate pinning, and secure credential storage are not optional for apps handling user authentication or financial data. They are the minimum baseline. Our developers implement Keychain and Keystore correctly, configure Auth0 or Firebase Auth for production-grade identity management, and apply OWASP Mobile Top 10 mitigations by default. For HIPAA and PCI-DSS projects, they document compliance controls as part of delivery.
Testing: Automated, Device Farms, and Performance
Manual testing against a single physical device is not a QA strategy when your app needs to run on 15,000 Android device models. Our developers implement XCTest for iOS unit and UI tests, Espresso for Android, and Detox for cross-platform end-to-end tests. They configure AWS Device Farm or Firebase Test Lab for automated runs against real device fleets. Performance profiling in Xcode Instruments and Android Profiler is part of the release checklist, not the post-release incident response.
DevOps: CI/CD, App Store Pipelines, and OTA Updates
App Store and Google Play deployments are not instant: review cycles, binary upload size limits, and phased rollouts add process steps that slow teams who have not automated them. Our developers configure Fastlane lanes for automated screenshot generation, binary signing, and TestFlight or Play Store internal track uploads. Bitrise or GitHub Actions for mobile CI pipelines. CodePush or Expo OTA for JavaScript-layer updates that bypass review for eligible changes.
PLATFORM EVOLUTION
Mobile Platform Evolution: Why It Matters for Your Project
Mobile is not a stable platform. iOS and Android ship annual major releases that deprecate APIs, change permission models, and require minimum SDK updates within 12 months or apps get removed from the stores. Understanding where the mobile ecosystem stands today helps you make informed decisions about native versus cross-platform and which framework investments pay long-term dividends. Here is how the platforms have matured.
SwiftUI and Jetpack Compose Introduced
FoundationApple shipped SwiftUI in iOS 13 and Google shipped Jetpack Compose stable in 2021, both declarative UI frameworks designed to replace UIKit and the View system. Teams that started adopting SwiftUI on iOS 13 encountered rough edges: missing UIKit functionality and limited API coverage. The lesson: declarative UI frameworks require 2 to 3 major releases to reach production readiness. Teams shipping SwiftUI-only apps today benefit from that maturation.
Flutter Stable and React Native Architecture Rework
MaturingApple shipped SwiftUI in iOS 13 and Google shipped Jetpack Compose stable in 2021, both declarative UI frameworks designed to replace UIKit and the View system. Teams that started adopting SwiftUI on iOS 13 encountered rough edges: missing UIKit functionality and limited API coverage. The lesson: declarative UI frameworks require 2 to 3 major releases to reach production readiness. Teams shipping SwiftUI-only apps today benefit from that maturation.
Privacy Enforcement and App Tracking Transparency
Current StandardApple's App Tracking Transparency framework and iOS 14.5 changed how mobile advertisers and analytics platforms operated. Apps that collected IDFA without explicit consent began losing attribution data. This shift accelerated adoption of server-side event tracking and privacy-preserving analytics. Apps that did not adapt saw attribution accuracy drop by 60%+ in affected categories. Our developers implement privacy-compliant analytics by default.
React Native New Architecture and Flutter 3.x
Current LTS EquivalentReact Native 0.71 and later began enabling new architecture features. Flutter 3.x added Impeller rendering engine, replacing Skia and eliminating shader compilation stutters that caused janky first-run animations. Both frameworks reached a maturity level where enterprise adoption became low-risk. Teams that had deferred cross-platform investment began committing in earnest. The performance gap with native closed to within 10% on benchmark suites.
OS 17/18 and Android 14/15 — AI Features and Adaptive UI
Latest StableiOS 17 and 18 introduced Apple Intelligence features, Journal API, and Adaptive UI components that respond to Dynamic Island and flexible display sizes. Android 14 and 15 added predictive back gestures, large screen optimization requirements, and Health Connect as the unified health data platform. Apps not updated for large screen support are being demoted in Play Store search results as of late 2024. Developers building today must target these APIs or face app store penalties within 12 months.
TECHNOLOGY FIT ASSESSMENT
When Mobile Is the Right Investment (And When It Is Not)
Mobile is not the right delivery channel for every product. Here is when you should invest in a dedicated mobile team versus alternatives like progressive web apps or responsive web, and when you should not.
Hire a Dedicated Mobile Team When
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If your product depends on Bluetooth LE, NFC, ARKit/ARCore, HealthKit, biometric authentication with Secure Enclave, or background location, you need native development. Progressive web apps cannot access these APIs. React Native or Flutter can. This is the decision that should drive your platform choice, not preference.
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Enterprise tools distributed via MDM, consumer apps requiring offline mode, and regulated apps requiring identity verification before first use all require native or cross-platform mobile. If your sales team pitches App Store and Google Play availability as a feature, you need mobile developers.
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At this scale, web performance optimizations hit diminishing returns and user expectations for responsiveness become native-level. Apps competing in categories like fintech, fitness, or social require sub-200ms UI interactions and battery-efficient background processing that only native implementation delivers consistently.
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HIPAA requires documented security controls. PCI-DSS requires specific cryptographic implementations. Both are easier to demonstrate and audit in native mobile apps than in browser-based alternatives. If your compliance officer is involved in the platform decision, native mobile is usually the defensible choice.
Do NOT Hire a Dedicated Mobile Team When
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Internal tools accessed twice a week by a desktop-primary workforce do not justify native mobile investment. Use a responsive web app or a low-code platform like Retool. Save the mobile budget for customer-facing experiences.
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Blogs, documentation, marketing sites, and informational tools belong in the browser. A progressive web app with service worker offline support is sufficient and avoids App Store review cycles entirely. Use React or Next.js instead.
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Starting mobile development without defined user stories and a tested design system is how teams build three months of work they throw away. Invest in a product sprint and UX design first. Mobile developers are expensive when they are waiting for requirements to stabilize.
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App Store review takes 1 to 7 business days. Google Play takes 1 to 3 days. Binary preparation, TestFlight distribution, and staged rollout add time before that. If you need something live in under 4 weeks, start with a web app and add mobile in the next phase.
Ask yourself: Do my users need device features, offline access, or App Store distribution? The right choice depends on your user expectations, compliance requirements, and growth trajectory. We help you make that decision based on 2,000+ projects across mobile and web delivery models. CTA: Schedule Technical Assessment
"Their mobile engineers perform at very high standards. Every sprint they ship exactly what was defined, the code is clean, and they surface architecture concerns before they become problems. We have had a strong relationship for almost three years now."
The best mobile partnerships are the ones where you stop worrying about delivery and start worrying about what to build next. That is the relationship we work to build.
Michael Torres
Series C Fintech Platform | Tenure: 3 years
WHY CHOOSE US
Why Forward-Thinking CTOs Choose HireDeveloper
We do not hire developers who finished a mobile bootcamp last quarter. We hire mobile engineers who have shipped production apps on the App Store and Google Play in domains where an App Store rejection or a 1-star crash rating determines project success or failure. Every candidate completes a take-home assignment that involves implementing an offline-first sync feature with conflict resolution, not algorithmic puzzles. Top 1% acceptance rate.
Your projects ship 40% faster because our developers understand memory management, main thread blocking, and view hierarchy render passes before they write their first line. They profile before optimizing. They run Xcode Instruments on every release candidate. They benchmark scroll performance on a low-end Android before marking a ticket done. No guessing. Every optimization is measured.
We maintain specialists for App Store review navigation, binary signing and entitlements, and Play Store policy compliance. Developers understand App Store review guidelines chapter and verse, App Transport Security requirements, and background processing entitlement applications. They have shipped apps through review processes for healthcare, fintech, and children's categories, where rejection reasons are rarely straightforward. Shipped apps in production, not tutorial certificates.
Every engagement starts with architecture review. We map your existing app structure, identify integration points, understand your backend API contracts and versioning strategy. Developers join your standups, use your tools, follow your workflows. No parallel universe. Your team expands, not fragments.
ISO 27001 certified. SOC 2 Type II available on request. Zero security incidents in 3 years. 47+ enterprise audits passed. $2M professional liability, $1M errors and omissions, plus cyber insurance coverage. Background checks on every developer: criminal, education, and employment verification.
4 to 8 hours overlap with US, EU, or APAC time zones. Core hours availability for standups and code reviews. Async handoffs documented. No black box development. You see commits daily, not monthly.
Dedicated team at monthly rate. Fixed price for defined scope. Hourly for overflow work. Scale up with 1 to 2 weeks notice. Scale down with 2 weeks notice. No long-term contracts required.
If a developer does not meet your expectations within the first two weeks, we replace them at no additional cost. No questions asked. We also conduct regular check-ins to address concerns before they become problems.
INTEGRATION TIMELINE
How Our Mobile Developers Integrate With Your Team
Realistic timeline from first contact to production code
Discovery
- Requirements call,
- Tech stack review
- Team structure mapping
Matching
- Profiles shared
- You interview
- Technical assessment
Onboarding
- Contracts signed
- Access setup
- Access setup
Shipping
- First PR merged
- Production code delivered
- Ongoing iteration
How We Use AI in Delivery
AI IN DELIVERY
Faster Shipping, Not Replacement
AI assists our mobile developers at specific decision points. It does not replace their judgment. .
Boilerplate code, SwiftUI view templates, Kotlin data class generation, test scaffolding, documentation stubs
Codebase navigation and Q and A, context-aware suggestions when onboarding to a new app architecture, identifying legacy API usage
App Store guideline interpretation, debugging patterns for known iOS and Android issues, RegEx generation for input validation, code explanation
IP-sensitive projects, local model inference for healthcare or fintech apps, air-gapped environments
AI IN MOBILE DELIVERY: WHAT IT DOES WELL
- AI Does Well (We Use):
- Documentation generation
- Test case scaffolding for unit tests
- Boilerplate code completion
- SwiftUI / Compose code templates
- Regex and data parsing generation
- Repetitive refactoring patterns
- AI Does Well (We Use):
- Documentation generation
- Test case scaffolding for unit tests
- Boilerplate code completion
- SwiftUI / Compose code templates
- Regex and data parsing generation
- Repetitive refactoring patterns
Real Impact on Your Project
Measured Q4 2024 across 50+ projects
ENTERPRISE SECURITY
Security & IP Protection
Enterprise-grade security for regulated industries
What We Enforce
Code ownership assigned to you before repository access granted. Work-for-hire agreements standard. No retained rights. Your app code is your code. Apple Developer Program and Google Play Console accounts are yours before we touch them.
Criminal background check, education verification, employment history validation, reference checks. Every developer, no exceptions. Reports available on request. For healthcare and fintech clients, extended verification including financial background is available.
Secure office facilities with monitored access. Dedicated devices for client work. USB ports disabled on development machines. Screen recording available for compliance-sensitive projects. No client source code leaves secure environments.
MFA required for all systems including Apple Developer Program and Google Play Console. VPN-only access to client infrastructure. 4-hour access revocation guarantee at engagement end. Role-based permissions reviewed monthly. Certificate and provisioning profile ownership stays with client accounts.
Full code handover at engagement end. No vendor lock-in. Complete documentation transfer including architecture decision records and deployment runbooks. Knowledge transfer sessions included. You walk away with everything including signing certificates, push notification configurations, and store listing ownership.
Mobile Developers Pricing & Rates
Real Rates, Real Experience
Entry Level
1-3 years experience
Needs supervision.
Skills
- Component creation
- Template syntax
- Basic routing
- Angular CLI usage
Experienced
4-7 years experience
Works independently
skill
- Reactive Forms
- RxJS operators
- Lazy loading
- Unit testing with Jest
Expert
8+ years experience
Mentors team
Skills
- NgRx state management
- Performance optimization
- CI/CD pipelines
- System design
Architect
10+ years experience
Owns architecture
Skills
- Micro frontend architecture
- Platform engineering
- Team leadership
- Enterprise patterns
We focus on Experience+ engineers who ship. . For projects requiring junior developers, we recommend local contractors or bootcamp partnerships.
See full pricing breakdownRATE BREAKDOWN
What Is Included in the Rate
$5,500 per month Senior Mobile Developer
Dedicated Senior Mobile Developer at $5,500 per month
- Predictable monthly cost — no surprises
- All-inclusive: no hidden fees, no onboarding charges
- Full-time dedicated resource — not shared across clients
- Replacement guarantee included
- Management, QA coordination, and Apple Developer Program navigation included
Cheap Offshore Alternative: $25 per hour Freelancer/hr Freelancer
- Advertised: $4,000 per month (160 hours)
- Reality: $6,500+ per month after onboarding time (unbilled but real)
- management overhead (your senior developer's time),
- replacement costs when they move to the next project.
The cheapest option is rarely the most economical.
CLIENT CASE STUDIES
Recent Outcomes
See how teams like yours solved mobile development challenges. For more case studies, visit our dedicated developers service page.
The Challenge
- Problem: Fintech startup needed to launch iOS and Android apps simultaneously for a Series B milestone, with one overloaded senior iOS developer and no Android presence
- Risk: Missing the 90-day funding milestone would affect Series C valuation conversation
- Constraint: PCI-DSS scope had to be maintained throughout rapid team expansion
Our Approach
- Week 1: Discovery call, PCI-DSS architecture review, existing iOS codebase audit
- Week 2 to 4: Two senior developers onboarded: one iOS architect, one senior Kotlin developer. Android project scaffolded with clean architecture mirroring iOS patterns
- Week 5 to 12: Both platforms reached feature parity. PCI-DSS tokenization implemented via Stripe SDK on both platforms. TestFlight and Play Store internal testing configured.
Verified Outcomes
'They moved faster than I expected and without compromising the compliance controls we needed. The Android launch happened in parallel with iOS, not 6 months behind it.'
The Challenge
- Problem: Healthcare system needed a patient-facing mobile app for appointment scheduling, lab results, and telehealth initiation, with full HIPAA compliance
- Risk: HealthKit integration and PHI handling required architecture expertise their web team did not have
- Constraint: Legal team required documented HIPAA control evidence before app launch
Our Approach
- Week 1: HIPAA security rule control mapping for mobile, HealthKit data access consent flow design
- Week 2 to 6: FHIR API integration built with encrypted local storage, biometric authentication, and AES-256 data at rest. Certificate pinning configured
- Week 7 to 12: App Store Medical category submission prepared. Privacy nutrition label completed. App Store review passed first submission.
Verified Outcomes
'The App Store Medical category review process is not forgiving. These developers knew exactly what Apple looks for and built accordingly. First submission approval saved us at minimum 3 weeks.'
The Challenge
- Problem: Android app built on Java targeting API level 29 was below Google's API level 34 requirement and facing Play Store removal warning
- Risk: 1.2M monthly active Android users would lose app access with no migration path prepared
- Constraint: Zero-downtime requirement: app had to remain on Play Store throughout migration
Our Approach
- Week 1 to 2: Java-to-Kotlin migration plan created using Android Studio's automated conversion as a starting point, with manual review for business logic modules
- Week 3 to 8: Incremental Kotlin migration: one module per week, maintaining full test coverage using Espresso throughout
- Week 9 to 16: Jetpack Compose migration for high-traffic screens: product listing, checkout, account. API level 34 target confirmed. Play Store requirement satisfied.
Verified Outcomes
'The migration was genuinely invisible to our users. We hit the API level requirement without an emergency and the Compose screens perform noticeably better than what they replaced.'
QUICK FIT CHECK
Are We Right For You?
Answer 5 quick questions to see if we're a good match
Question 1 of 5
Is your project at least 3 months long?
Offshore teams need 2-3 weeks to ramp up. Shorter projects lose 25%+ of timeline to onboarding.
FROM OUR EXPERTS
What We're Thinking
Frequently Asked Questions About Hiring Mobile Developers
How quickly can I hire mobile developers through HireDeveloper?
We match you with pre-vetted mobile developers within 48 hours of receiving your requirements. After you interview and approve candidates, which typically takes 1 to 2 days, developers can start onboarding within 5 days. Most teams have their first production pull request merged by Day 12. This assumes you have requirements documented and App Store or Google Play developer program access available for provisioning. If you need help defining requirements, add 3 to 5 days for a discovery sprint.
What is your vetting process for mobile developers?
Four-stage vetting. First, a technical assessment covering iOS or Android fundamentals plus platform-specific advanced topics: memory management, background processing, App Store submission process, and offline sync patterns. Second, a live coding interview with a mobile-specific system design component for senior roles: we ask candidates to design an offline-first chat feature or a multi-step checkout flow with retry logic. Third, an English communication assessment via video call. Fourth, background verification covering criminal record, education, and employment history. Top 1% of applicants pass. Average experience of accepted candidates: 7.8 years.
Can I interview developers before committing?
Yes, always. We share 2 to 3 candidate profiles with detailed technical backgrounds, shipped app portfolios (App Store and Google Play links), and communication samples. You conduct your own interviews however you prefer: technical screens, pair programming sessions, system design discussions. No commitment until you approve. If none of our initial candidates fit, we source additional candidates at no cost.
How much does it cost to hire a mobile developer?
Monthly rates by experience level: Junior (1 to 3 years) $2,500 to $3,500, Mid-level (4 to 7 years) $3,500 to $5,000, Senior (8 or more years) $5,000 to $7,000, Lead/Architect (10 or more years) $7,000 to $10,000+. All rates are fully loaded: developer compensation and benefits, equipment including Mac and physical test devices, software licenses, infrastructure, management, and replacement insurance. No hidden fees. No setup costs. The rate you see is the rate you pay. US mobile developer salaries average $125,000 per year (Glassdoor 2025), which is why offshore senior talent at $5,000 to $7,000 per month represents meaningful cost efficiency without quality compromise.
What is included in the monthly rate?
Everything required for the developer to be productive: base salary and benefits, health insurance, equipment including MacBook Pro, iPhone test devices, and Android test devices covering at least 3 API levels, software licenses including Xcode, Android Studio, and productivity tools, secure office infrastructure, management overhead, and replacement insurance. For mobile specifically, this also includes Apple Developer Program membership costs and Google Play Developer account access provisioning. You pay one predictable monthly amount.
Are there any hidden fees or setup costs?
No. Zero setup fees. Zero onboarding charges. Zero surprise invoices. The monthly rate covers everything for standard engagements. If you need additional services like dedicated project management beyond developer-level coordination, App Store Connect account creation and initial configuration, or specialized compliance training for HIPAA or PCI-DSS, we quote those separately and upfront before you commit. Over 90% of our clients use standard engagements with no add-ons.
What mobile platforms and frameworks do your developers work with?
Our mobile developers work across iOS (Swift 5.10, SwiftUI, UIKit, Objective-C for legacy projects), Android (Kotlin, Jetpack Compose, Coroutines, Java for legacy projects), React Native (0.76 with new architecture enabled), and Flutter (3.24 with Impeller rendering). Cloud integrations include AWS Amplify, Firebase, Azure Mobile Apps, and Supabase. We match developers to your specific platform and framework requirements. If you are on an older iOS or Android SDK version for compliance reasons, we have developers with that experience too.
Can your developers work with our existing tech stack?
Yes. During discovery, we map your current app architecture, backend API contracts, CI/CD pipeline configuration, App Store and Google Play account structure, and device testing approach. We prioritize developers with direct experience in your stack. If exact match is unavailable, which is rare for iOS, Android, React Native, and Flutter, we select developers with adjacent experience and provide 1-week targeted ramp-up on your specific patterns. You approve the match before we start.
What is the minimum engagement period?
We recommend 3 months minimum. Mobile development has real ramp-up cost: understanding the existing app architecture, getting provisioned with Apple Developer Program and Google Play Console access, and making meaningful contributions takes 2 to 3 weeks. Shorter engagements are possible for tightly scoped work such as App Store submission preparation, a specific feature implementation, or a security audit, but require upfront definition. Month-to-month is available after the initial 3 months.
Can I scale the team up or down?
Yes, with reasonable notice. Scale up: 1 to 2 weeks notice. We maintain a pre-vetted bench of mobile developers for iOS, Android, React Native, and Flutter. Scale down: 2 weeks notice to allow proper handoff including App Store signing certificate transfer, documentation of provisioning configuration, and knowledge transfer sessions. No penalties for team size changes. If you need to scale to zero at project end, 2 weeks notice and we handle a clean exit with full code ownership transfer.