Case Studies ArchiveFlutter • Telecom & Travel
Telzen Global
Telzen Global eSIM Platform
One-click eSIM setup for international travelers
A seamless cross-platform connectivity application enabling global travelers to purchase, automatically configure, and monitor international mobile plans.
RoleLead Mobile Engineer
PlatformFlutter
Timeline2023 – Present
DomainTelecom & Travel
Project at a Glance
Installation1-Click eSIM
Payment GatewaysStripe & EPS
PlatformsiOS & Android
Architecture & Engineering Challenge
Engineered one-click eSIM activation for compatible modern iOS and Android smartphones, featuring automated hardware detection and fallback support for physical SIM delivery.
Integrated Stripe and EPS payments, and added deep links for countries, packages, regions, and checkout.
Integrated WisperBot customer support SDK alongside Apple and Google social login providers for effortless user onboarding.
Key Technical Deliverables
Hardware-level eSIM compatibility inspection before package purchase
One-click native carrier profile installation via system APIs
Multi-currency payment pipelines supporting global credit cards and regional gateways
Real-time data usage consumption telemetry and top-up alerts
Production Releases
Technology Stack
FlutterBLoCREST APIStripeEPS GatewayWisperBot SDKDeep Linking
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