Mobile Developer

Rosdeb Koch

Crafting exceptional mobile experiences with Flutter, Kotlin, Java, and Swift — elegant, performant, and built to last.

Rosdeb Koch — Mobile Developer

Rosdeb Koch

Mobile developer focused on smooth UX, performance, and production-ready apps.

FlutterDartJavaKotlinSwift
1.2+
Years
12+
Projects
5+
Live Apps
main.dart — lib/view/screens
class Portfolio {
final name = 'Rosdeb Koch';
final skills = ['Flutter', 'Swift', 'Kotlin'];
// Building beautiful mobile apps ✨
String build() {
return 'Amazing Apps';
}
}
$
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01 — About

Mobile Engineer

1.2+
Years delivering
production-ready mobile apps
12+
Projects
5+
Live Apps
Cross-platform delivery with Flutter and Dart
Native implementation across Kotlin, Java, and Swift
Product-focused execution from UI to release support

Professional Profile

I am a mobile application developer focused on building reliable, user-centered products with Flutter, Kotlin, Java, and Swift. My work covers the full delivery cycle, from translating product requirements into scalable architecture to shipping polished experiences for production.

I work best in environments where speed matters but quality still has to hold up in real use. I care about maintainable code, thoughtful UI implementation, API integration, performance, and collaboration with designers, QA, and stakeholders throughout the release process.

App architecture
API integration
Clean UI implementation
Store-ready delivery

03 — Skills

Technical Expertise

A rounded, product-focused skill set built around cross-platform delivery, native mobile engineering, and the tools needed to ship reliable apps.

4 capability zones16 core toolsCupertino-inspired workflow
Cross-platform apps with Flutter and Dart
Native Android delivery with Kotlin, Java, Android Studio, and XML
Modern iOS implementation with Swift and SwiftUI
Production tooling across Firebase, APIs, maps, real-time communication, and CI/CD

Cross-Platform

FlutterDart

Android

KotlinJavaAndroid StudioXML

iOS

SwiftSwiftUI

Tools & Platforms

GitAgoraGoogle MapsSocket.ioIoTFirebaseREST APIsCI/CD

05 — Work

Selected Projects

A closer look at one of the products I shipped recently, followed by a selection of other mobile and web builds.

06 — Experience

Industrial Experience

June - 2025 — Present

Mobile App Developer

SparkTech Agency

Leading mobile development initiatives, mentoring junior developers, and architecting scalable applications.

June - 2025 — Present

Junior Flutter Developer

SparkTech Agency

Developed and deployed multiple cross-platform applications, focusing on user experience and performance.

June - 2025 - October 2025

Trainee Flutter Developer

SparkTech Agency

Built Flutter applications for Android and iOS, collaborated with UI/UX teams, and participated in agile development.

06 — Contact

Let's Work Together

Reach out directly

rosdevkoch@gmail.com
GitHub ↗LinkedIn ↗Twitter ↗

Or use the form below — I usually respond within 48 hours.