Native-grade mobile apps, shipped for iOS and Android.
Fluid 60 FPS mobile apps built with React Native and Expo. Seamless offline-first architecture, hardware device integration, and automated App Store delivery with 90%+ shared code.
Building two separate native codebases doubles your cost and slows your velocity.
Maintaining two siloed engineering teams for iOS (Swift) and Android (Kotlin) creates fragmented feature roadmaps, inconsistent user experiences, and bloated development budgets that drain startup runways.
I engineer cross-platform mobile apps using modern React Native with the Hermes JavaScript engine and the New Architecture (JSI). You get genuine 60 FPS fluidity, native UI gestures, and hardware access while sharing 90%+ of business logic between platforms.
From biometric face-ID authentication to offline SQLite synchronization and background notifications, your app delivers a first-class native feel on every device.
Native Platform Bridge (JSI)
Direct JavaScript-to-Native communication without serialization bottlenecks.
Fluid Gesture & Motion Engine
Hardware-accelerated gesture recognizers running entirely on the native UI thread.
Offline-First Local Data Store
Ultra-fast local key-value storage with background delta sync on reconnect.
Cloud Sync & Push Engine
Over-The-Air (OTA) runtime updates and prioritized push notifications.
What's included in mobile app engineering
End-to-end mobile development from interactive prototype to App Store submission.
Cross-Platform React Native & Expo
Unified TypeScript codebase running natively on both iOS and Android with single-source design fidelity.
- Hermes JS Engine
- Expo EAS Workflows
- Shared Component Library
Fluid Gestures & Micro-Interactions
Silky 60 FPS transitions, spring physics, and haptic feedback powered by Reanimated 3 running on the UI thread.
- Native Gesture Handlers
- Haptic Feedback Engine
- Zero JS-Thread Jitter
Offline-First Data Architecture
Full offline functionality with SQLite and MMKV caching, auto-syncing mutations when connectivity restores.
- Offline Queue Sync
- Fast MMKV Storage
- Optimistic State Rendering
Native Hardware & Sensor Access
Seamless integration with device cameras, GPS location tracking, biometric Face ID, Bluetooth, and gyroscopes.
- Biometric Auth (Face/Touch ID)
- Camera & QR Scanning
- Background Geolocation
Push Notifications & Deep Linking
Reliable push notifications via APNS and FCM with universal deep links that route users directly to specific screens.
- Universal & App Links
- APNS & FCM Integration
- Badge & Sound Handlers
Automated App Store CI/CD
Hands-off deployment pipelines with Fastlane and Expo EAS for automated TestFlight and Play Store distribution.
- Automated Fastlane Builds
- Over-The-Air (OTA) Hotfixes
- TestFlight Beta Pipelines
What we engineer for mobile platforms
Bespoke mobile applications engineered for high engagement and rock-solid reliability.
Build fast. Deploy it right. See how we deliver.
From mobile Figma designs to live TestFlight and Play Store betas.
Mobile UX Mapping & Hardware Spec
Map touch navigation flows, define offline storage schemas, and specify hardware permissions (Camera, Biometrics).
- ›Mobile Screen Flow Hierarchy
- ›Hardware Permission Matrix
- ›Offline Sync Data Specification
Core React Native Development
Build native UI screens, implement gesture animations, integrate backend APIs, and configure local SQLite storage.
- ›Working TestFlight / APK Alpha
- ›60 FPS Reanimated Interactions
- ›Local Database Storage Engine
Device Testing & Performance Profiling
Test across real physical iOS and Android devices, audit memory usage, benchmark startup times, and eliminate crashes.
- ›Multi-Device Compatibility Matrix
- ›Memory & Startup Benchmark Report
- ›Crashlytics & Sentry Integration
Store Submission & Automated OTA Setup
Generate store screenshot assets, handle Apple & Google review submissions, and configure Over-The-Air runtime updates.
- ›Apple App Store Submission
- ›Google Play Store Release
- ›Expo EAS OTA Hotfix Pipeline
Why Jimish for Mobile App Development?
A single engineer delivering both platforms faster than two separate native teams.
| Evaluation Criteria | With Jimish (Direct Architect) | Traditional Agency | In-House Hiring |
|---|---|---|---|
| Platform Strategy | Unified React Native codebase sharing 90%+ logic across iOS and Android | Pushes for two separate codebases to double billable hours | Requires hiring two distinct engineers (Swift + Kotlin) |
| Time-to-Store | Live beta on TestFlight in 3 weeks; production store approval in 6 weeks | 4 to 6 months minimum with heavy overhead | 6+ months of team building and cross-platform sync |
| Animation & Polish | Native UI-thread animations via Reanimated 3 with haptic tactile feel | Basic webviews or laggy JS-thread transitions | Varies depending on developer mobile specialization |
| OTA Hotfix Capability | Instant bug fixes deployed over-the-air without waiting for Apple review | Requires re-submitting full binaries and waiting 2-3 days | Requires complex manual EAS / CodePush pipeline setup |
| Store Publishing Support | 100% full-service handling of Apple & Google developer accounts and guidelines | Hands off build and leaves app store rejections to you | Internal developer handles store compliance |
Built for teams with no room for error
Mobile and responsive digital products built with uncompromising craft.
Vantly Health
HIPAA-compliant care management platform automating family updates and staff workflows for nursing homes.
TrySpeed Platform
High-frequency crypto payout engine handling $2M+ daily volume.
Engineering Principles & Deliverables
Native UI Thread Priority
Heavy calculations never block the user interface. All animations, gestures, and scrolling run on native C++ threads.
- Hermes V8 Engine Optimization
- Reanimated Worklets on UI Thread
- Minimal JavaScript Bridge Overhead
Resilient Offline Operation
Apps function seamlessly in low-connectivity environments, caching actions locally and resolving conflicts upon reconnection.
- Local SQLite Storage Layer
- Optimistic Mutation Queue
- Automated Conflict Resolution
Automated Release Automation
Automated builds deploy to TestFlight and Google Play Internal testing on every git tag with zero manual overhead.
- Expo EAS Build Automation
- Fastlane Signing Certificates
- Instant OTA Runtime Hotfixes
Built with technologies you trust
Modern cross-platform mobile tooling designed for native power and rapid iteration.
Mobile Frameworks
Animations & UI
Storage & State
Distribution & CI/CD
Common Questions.
Everything you need to know about partnering for Mobile App Development. Have a unique technical challenge? Let's discuss it directly.
Yes. With React Native's modern Hermes engine, Fabric renderer, and JSI (JavaScript Interface), there is zero bridge serialization delay. By running gestures and animations on the native UI thread via Reanimated 3, the user experience is indistinguishable from pure native Swift.
Ready to build high-scale software for your business?
Let's discuss your product goals, timeline, and technical architecture. Direct senior engineer access from day one.