Innostax places vetted mobile developers — React Native, Flutter, iOS (Swift), Android (Kotlin) — directly into your team. Hired on ability, onboarded to your mobile codebase before the engagement starts, and AI-fluent as standard. Available within days, not months.
For React Native roles — our most common mobile placement — typically within a week. For native iOS or Android specialists, one to two weeks depending on seniority and specialisation. Flutter roles typically within one to two weeks. We’ll give you a realistic timeline during the initial conversation.
What most mobile developer hiring gets wrong
Mobile development has a deceptively high floor and a very high ceiling. Getting an app to launch is achievable with a moderately skilled developer. Getting an app that retains users — that feels native, performs consistently across the device matrix, handles offline states gracefully, and doesn’t drain the battery — requires a different level of judgment entirely.
The gap shows up in specific ways. Animations that are technically present but feel slightly off because they’re not running at 60fps. An offline state that wasn’t designed for, so the app shows a blank screen instead of cached content.
A push notification implementation that works on the developer’s iPhone and fails on a mid-range Android. A React Native app that performs well in development and jitters on a real device because nobody profiled the render cycle.
These aren’t catastrophic failures — they’re the friction that accumulates into a 3-star review and a user who doesn’t come back. Mobile done well requires platform-specific judgment that most developers who’ve only worked on web don’t have.
Innostax mobile developers are assessed on platform depth — not just their ability to build a screen from a Figma file.
Mobile development expertise
Every engagement is different. Use the links below to explore focused pages for this service.
Cross-platform mobile development — iOS and Android from a single codebase — without the UX compromises that gave cross-platform a bad reputation. Our React Native developers are assessed on navigation architecture, performance optimisation (FlatList, memo, native driver animations), platform-specific behaviour handling, and the bridge between JavaScript and native modules. Our most common mobile placement for consumer and B2B products that need both platforms.
Learn more →Dart and Flutter for teams that need pixel-perfect custom UI across mobile, web, and desktop from a single codebase. Flutter's rendering engine gives full control over the visual layer — the right choice for design-led products where React Native's component model creates constraints. Assessed on widget architecture, state management (Riverpod, Bloc, Provider), and Flutter's specific performance patterns.
Learn more →Native iOS development — SwiftUI and UIKit, Combine, async/await, HealthKit, ARKit, push notifications, App Store submission and review guidelines. For teams whose product requires deep iOS platform integration or where App Store performance metrics are critical to growth. Assessed on Swift concurrency, memory management, and the platform-specific patterns that determine App Store review outcomes.
Learn more →Native Android development — Jetpack Compose and XML layouts, Coroutines, Room, WorkManager, the Android device and OS fragmentation that makes Android development harder than it looks. For teams whose user base skews Android or whose product requires deep Android platform integration. Assessed on Kotlin coroutine patterns, lifecycle awareness, and the device compatibility handling that determines real-world reliability.
Learn more →For teams with existing mobile apps that are slow, janky, or battery-intensive — profiling, render optimisation, memory leak detection, and the specific fixes that move performance metrics. The discipline that keeps a mobile app in the top tier of its category rather than the middle.
Learn more →Submission, metadata optimisation, review guidelines compliance, and the back-and-forth with Apple and Google review teams when issues arise. Mobile developers who've been through the process enough times to know where rejections happen and how to avoid them.
Learn more →A React Native developer who doesn’t understand iOS and Android platform behaviour is a React Native developer who will ship platform-specific bugs they can’t diagnose. Our mobile developers understand the platforms they’re building for — not just the framework they’re building in.
Mobile development requires judgment about platform behaviour, performance characteristics, and the user experience decisions that determine retention. We hire on IQ-based criteria because that judgment — about when to use a native module, about how to handle offline state, about what 60fps actually requires — determines whether an app retains users or loses them.
Before an Innostax mobile developer writes a line of code, they’re onboarded to your app — your navigation architecture, your state management approach, your API integration patterns, your platform-specific handling. They understand how your app is structured before they’re asked to extend it.
Every Innostax developer uses Cursor with Claude and GPT-4 within project-specific guardrails. For mobile specifically, AI-generated implementations are reviewed against your existing patterns — navigation structure, component architecture, platform handling — before they merge.
AI review (confidence-scored), peer review, Tech Lead review, architect sign-off. Mobile PRs that introduce unnecessary re-renders, missing platform-specific handling, or memory leaks don’t merge.
Your mobile codebase, your platform targets, your actual sprint. You’ll know within two weeks whether the developer has genuine platform depth or whether the issues only surface when real users on real devices encounter them. If the latter, walk away. No invoice.
If the engagement isn’t working at any point — for any reason — you’re out tomorrow. No lock-in, no 30-day notice periods.
Great Place to Work certified — the mobile developer who learns your app’s architecture in month one is still accountable for it in month six. Mobile codebases accumulate platform-specific context — the edge cases, the device quirks, the App Store history — that doesn’t transfer in a handover document.
CLIENT OUTCOMES
Nuw
100K+ Downloads · 97% Retention • Top 10 App Store ranking
Innostax built and scaled the Nuw React Native app to 100,000+ downloads and a 97% user retention rate. A 97% retention rate isn’t a launch metric — it’s the signal that the app works the way real users on real devices expect it to. That’s what platform-depth mobile development produces.
"Well done team. Nuw is now #8 on both Irish App Store and Google Play Store for the shopping category."
Elate Wellbeing
Long-term mobile development and maintenance — the kind of engagement that only works when the codebase stays clean enough to keep building on and the developer knows the app’s history well enough to extend it without breaking it.
"I have very good working experience with Innostax for developing and maintaining mobile app for my business. Their team is very qualified and professional."
Consumer app founders who need mobile developers with the platform judgment to build something that retains users — not just something that launches. The difference between a 3-star and a 5-star app is almost always in the details that platform-depth developers get right and generalist developers miss.
CTOs extending an existing mobile product who need developers that can onboard to a complex mobile codebase quickly and contribute without introducing patterns that conflict with what’s already there — or platform-specific bugs that the existing team has already solved.
Product teams adding mobile to an existing web product who need mobile developers that understand how to integrate cleanly with an existing API layer and match the product’s quality standard on a new platform.
Tech Stack
The Tech Lead selects the right combination from this stack based on your product requirements, scale targets, and integration needs.
React Native is the right choice for most consumer and B2B apps that need to ship on both platforms — it delivers near-native performance when implemented correctly and significantly reduces development and maintenance overhead. Native is the right choice when your product requires deep platform integration (HealthKit, ARKit, platform-specific widgets) or when App Store performance metrics are critical to your growth model. We'll give you a clear recommendation during the initial conversation based on your product requirements, not based on what's easiest to staff.
Platform-specific handling is part of the assessment — not an afterthought. Our React Native developers understand the behaviour differences between iOS and Android at the platform level, not just the React Native API level. Platform-specific code is handled deliberately — with clear documentation of why a platform branch exists — rather than discovered when a user files a bug report.
We establish the minimum supported OS version and the target device matrix during onboarding — based on your actual user analytics, not a generic list. Testing covers the combinations that represent real risk for your user base. Android fragmentation is treated as a first-class engineering concern, not a post-launch discovery.
Yes. We handle the full submission process — metadata, screenshots, review guidelines compliance, and the back-and-forth with Apple and Google review teams if issues arise. We've been through the process enough times to know where rejections happen and how to avoid them.
Offline state is designed for during architecture, not discovered when a user reports a blank screen. During onboarding, we establish your app's offline requirements — which data needs to be cached, how conflicts are resolved when connectivity is restored, how the UI communicates connectivity state to users. Offline handling is a feature, not an edge case.
For React Native — our most common mobile placement — typically within a week. For native iOS or Android specialists, one to two weeks. Flutter roles typically within one to two weeks. We'll give you a realistic timeline during the initial conversation, not a number designed to win the deal.
