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Mobile DevelopmentClient Project
Telehealth & Appointments App
Cross-platform mobile app for booking, video visits, and health tracking
The client's name is withheld. Ask us to walk you through this build live.
Client
A healthcare provider
Timeline
4-month build
React NativeExpoNode.jsMongoDBWebRTCFirebase
About This Project
For a healthcare provider, we built a patient-facing mobile app that covers the full outpatient loop: finding a slot, attending a video consultation, and tracking health data between visits. The app is written in React Native, so iOS and Android ship from one codebase. WebRTC carries in-call media directly between participants, and the backend is confined to signaling and scheduling. The architecture follows HIPAA's technical safeguards: encryption in transit and at rest, session controls, and access logging.
The Engineering Problem
Healthcare apps combine three hard problems in one product: real-time video that must work on hospital Wi-Fi and weak mobile networks, scheduling logic that cannot double-book, and health data that demands stricter handling than a typical consumer app.
- •Video calls must recover from network handoffs without dropping the visit
- •Slot booking needs conflict detection across provider calendars, time zones, and buffer rules
- •Health data requires encryption at rest and in transit plus per-access audit logging
- •Wearable integrations differ per platform: HealthKit and Google Fit expose different models
- •One codebase has to feel native on both platforms, including notifications and deep links
Technical Approach
We structured the app around an offline-tolerant scheduling core and a peer-to-peer media path. Protected data stays encrypted end to end, and the server never touches the media stream.
- Implemented WebRTC video with automatic reconnection and adaptive bitrate for weak networks
- Built the booking engine with transactional slot holds to make double-booking structurally impossible
- Encrypted message and record storage at rest, with TLS-pinned transport and audit logging on access
- Abstracted HealthKit and Google Fit behind one health-data module with a shared schema
- Shipped one React Native codebase with platform-specific modules only for notifications and biometrics
How the Build Ran
Safeguard & Data Design
2 weeksMapped data flows against HIPAA technical safeguards and designed the encryption, session, and audit-logging model.
UI/UX Design
3 weeksDesigned the patient and provider journeys: booking, pre-visit checks, in-call controls, and history views.
Development
10 weeksBuilt scheduling, video, messaging, and health-tracking modules with continuous device testing on both platforms.
Field Testing
2 weeksTested call quality across network conditions and devices, and hardened the booking engine under concurrent load.
Key Features in This Build
Video Consultations
Encrypted WebRTC calls with screen sharing and automatic reconnection
Smart Scheduling
Conflict-free booking with provider calendars, buffers, and reminder notifications
Health Tracking
HealthKit and Google Fit sync feeding trend views shared with the provider
Secure Messaging
Encrypted patient-to-provider chat with document and image sharing
Build Scope
The screens, modules, and integrations below were all designed and delivered on this engagement, and we can walk you through them live.
40+
Screens designed & built
Across patient and provider journeys
6
Native integrations
HealthKit, Google Fit, push, camera, calendar, biometrics
WebRTC
Video stack
Peer-to-peer media with signaling backend
2
Platforms
iOS and Android from one codebase
Technology Stack
mobile
- React Native
- Expo
- Redux Toolkit
- React Navigation
backend
- Node.js
- Express
- MongoDB
- Socket.io
infrastructure
- Firebase
- AWS S3
- CloudFront
- Lambda
integrations
- WebRTC
- Twilio
- Apple HealthKit
- Google Fit
Designed to Extend
Extensions this architecture is built to support:
- Symptom intake forms that pre-fill the provider's visit view
- e-Prescription and pharmacy integration modules
- Provider-side analytics dashboard on the same backend
- Wearable companion app sharing the health-data module
Want to See It Running?
Ask us to walk you through this build live, and to map the approach onto your product.
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