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I will build linphone app, esim app, voip softphone app and video calling app
Ezekiel
About this gig
Hello,
To build a fully functional VoIP softphone, Linphone-based calling app, eSIM management app, or video call center platform, I got you covered.
I specialize in building cross-platform (iOS + Android) communication apps using Linphone SDK, SIP protocols, WebRTC, and modern eSIM APIs delivering apps that are stable, scalable, and production-ready.
WHAT I OFFER:
- VoIP Softphone App (SIP/Linphone based calling, HD audio, call routing)
- eSIM App (eSIM activation, QR provisioning, carrier integration, balance/plan management)
- Video Call Center App (1-on-1 & group video calls, agent dashboards, queue management)
- Cross-Platform Development (Flutter / React Native / Native iOS & Android)
- Push Notifications for Incoming Calls (CallKit / ConnectionService integration)
- Call History, Contacts Sync, In-App Chat, Call Recording
- Admin Panel / Backend (user management, billing, call logs, analytics)
- Third-party SIP Trunk / Twilio / Asterisk / FreeSWITCH integration
- App Store & Play Store deployment support
WHY WORK WITH ME:
- Hands-on experience with Linphone SDK & SIP/VoIP architecture
Let's get started.
Get to know Ezekiel
Ezekiel
your trusted expert
- FromFrance
- Member sinceMay 2026
- Avg. response time1 hour
Languages
English, French
📱 Mobile App Developer | Android | iOS | Flutter | React Native
I help businesses and startups turn ideas into high-quality mobile apps. Skilled in Flutter, React Native, Android, and iOS development, I build fast, scalable, and user-friendly applications with clean code and modern UI/UX. Committed to quality, timely delivery, and client satisfaction. Let's bring your app idea to life
Other Mobile App Development Services I Offer
FAQ
Do you use Linphone SDK or build VoIP from scratch?
I primarily use Linphone SDK / SIP protocols for reliability, but can also build custom WebRTC-based solutions depending on your needs.
Can you integrate eSIM provisioning with a specific carrier/provider?
Yes, I can integrate with GSMA RSP-compliant eSIM providers. Please share your provider's API docs during requirements discussion.
Is source code included?
Yes, full source code ownership is transferred upon final payment.
Do you provide a backend/server setup (Asterisk, FreeSWITCH, etc.)?
Yes, available in Standard and Premium packages, or as a custom add-on.
Can this be published to the App Store and Play Store?
Yes, I can assist with the full submission and deployment process.
