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Samuel Okello

@samuelokello

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Mobile Engineer at Mouv Africa building KMM marketplace payments and real-time features across Android and iOS.

Kenya

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At Mouv Africa, I ship features for a Kotlin Multiplatform marketplace app, sharing business logic across Android and iOS. I built a payment strategy and factory system for M-Pesa STK push and PayPal, with socket-based confirmation as the sole automatic payment channel.

I also designed a WebSocket event bus using Kotlin SharedFlow and implemented cross-platform location services for nearby listings. On my Mwenyeji commuter app project, I built an Android app for Nairobi commuters and took it from problem framing through Play Store submission and closed beta.

Experience

Work history, roles, and key accomplishments

Current

Mobile Engineer (Android | iOS)

Current

Mouv Africa

Jan 2026 - Present (8 months)

Ship features on a Kotlin Multiplatform (KMM) real estate and multi-service marketplace app, sharing business logic across Android and iOS via Compose Multiplatform. Built payment strategy/factory system supporting M-Pesa STK push and PayPal, and designed a WebSocket-based real-time event bus using Kotlin SharedFlow.

Kotlin Kotlin Multiplatform Compose Multiplatform M Pesa PayPal WebSockets SharedFlow FusedLocationProviderClient CoreLocation Haversine Firebase Multi Modules PR Review Release Processes

Android Developer Intern

Mentorlst

Oct 2023 - Apr 2024 (6 months)

Designed and implemented application features using Jetpack Compose, translating Figma design specifications into pixel-perfect, responsive UI components. Developed end-to-end search functionality combining real-time API queries via Ktor Client with Room-backed local persistence, and implemented secure GitHub OAuth2 authentication.