Kevin Sojitra

Mobile App Developer · iOS & Android (Available for Hire)

I am a Senior Mobile App Developer with over 7 years of professional experience architecting, building, and shipping high-performance native and cross-platform applications for iOS and Android.

My core technical expertise spans Swift & SwiftUI for iOS, Kotlin & Jetpack Compose for Android, Flutter for rapid cross-platform deployment, and Unity 3D / C# for interactive mobile games. As a key mobile developer at Appsaint Technology and an independent remote consultant, I build applications with clean, maintainable architecture (MVVM, Clean Architecture), smooth 60fps animations, real-time Firebase & cloud backends, and bulletproof security.

I have a proven track record working remotely with startup founders, tech leads, and product teams across the United States (EST/PST), United Kingdom (GMT/BST), and globally. From interactive AI companions like Syntrofos to high-engagement puzzle games like Arrows Out, I handle the complete lifecycle: UI/UX design, full-stack implementation, App Store / Google Play submission, and long-term maintenance.

Whether you are a US or UK startup needing a fast, store-ready MVP or an enterprise scaling your existing mobile team, let's build something exceptional together.

Skills & tools

Tools

App Store Connect Git Figma Google Play Console Android Studio Git & GitHub Workflow Clean MVVM / VIPER Architecture Xcode CI/CD CI/CD & Fastlane Automation Figma to Pixel-Perfect UI 60fps Performance Profiling

Backend

Firebase 88%

Firebase (Auth, Firestore, Cloud Functions) 95%

Laravel 80%

REST & GraphQL APIs 92%

Laravel & PHP Backends 85%

REST APIs 85%

Push Notifications (APNs / FCM) 94%

Languages

Swift 95%

Dart 95%

Kotlin 90%

C# 88%

JavaScript 80%

JavaScript / TypeScript 85%

Mobile

SwiftUI & UIKit 95%

Flutter 96%

SwiftUI 75%

Unity 3D (Mobile Games) 88%

Jetpack Compose 88%

React Native 70%

StoreKit & In-App Purchases 92%

CoreData, Room & SQLite 90%

Journey

Experience

May 2020 — Present

Android & Flutter Developer

Appsaint Technology · Gujarat, India · Remote

• Key mobile app developer building and scaling high-performance production titles including Arrows Out: Line Puzzle (Unity 3D / Android) and Syntrofos: AI Companion (iOS / SwiftUI / AI). • Spearheaded cross-platform Flutter and native iOS/Android development for applications scaling past 50,000+ active users. • Integrated real-time Firebase backends, AdMob & StoreKit monetization, and WebSocket data feeds.

Jun 2022 — Present

Senior Mobile App Developer (iOS, Android & Flutter) — Available for Hire

Remote Freelance & Contracts (USA, UK & Global) · Remote (US EST / UK GMT Timezone Overlap)

• Architected and shipped 10+ production iOS and Android mobile apps for US, UK, and international startups using Swift, SwiftUI, Flutter, and Unity. • Engineered interactive AI companions, puzzle games, and productivity tools with 99.8% crash-free session rates. • Managed end-to-end releases on Apple App Store Connect and Google Play Console, including StoreKit IAP monetization, subscriptions, and privacy compliance. • Implemented clean MVVM architecture and automated CI/CD pipelines to accelerate sprint delivery by 40%.

Jan 2019 — May 2020

Mobile App Developer (Android & Flutter)

Freelance & Open Source Projects · Remote

• Built native Android applications in Kotlin/Java and cross-platform mobile apps in Flutter. • Designed interactive UI/UX interfaces and integrated third-party REST APIs and SQLite/Room databases. • Optimised rendering pipelines and memory consumption to maintain stable 60fps performance.

Let's build something great

Have a project in mind or need support with an app? Get in touch.

See my apps Contact me