
Mahin
Native Android App Developer, Kotlin Compose and AI Integration
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Expérience professionnelle
Title: Android & Full-Stack Developer
Freelancing Career • Freelance
Jun 2024 - Present • 2 yrs 2 mos
Native Android & Full-Stack Developer specializing in Kotlin, Jetpack Compose, Firebase, Python, and AI API integration. I have independently designed, built, and shipped 3 production grade Android applications each demonstrating a distinct layer of deep technical expertise. K-Speak (한길 STEPS) — A Korean language learning app with 4 structured modules: Hangul alphabet lessons, a 76-word vocabulary builder across 8 real-life categories (Animals, Colors, Family, Food, Greetings, Numbers, Places, Time) with audio pronunciation on every word, daily conversational phrases, and an interactive quiz system. Built with Kotlin, Jetpack Compose, and SQLite for a fully offline-first experience. Includes user profiles, learning statistics (words learned / study time), and in-app Help & Support. Unit Converter — A precise, real-time Android utility app covering 8 measurement categories (Length, Weight, Temperature, Area, Volume, Speed, Time, Digital Storage). Built with Kotlin and Jetpack Compose instant conversions, floating-point precision, and a smooth native UI built for daily professional use. Digital Transcript Attestation & Verification System — A full-stack, blockchain-powered document security platform. Academic transcripts and official documents are hashed using SHA-256 cryptography and permanently recorded on a blockchain — creating a tamper-proof, immutable attestation record. Verifiers instantly confirm authenticity by recomputing hashes. Powered by Firebase (Authentication, Firestore, Storage, Cloud Functions) with role-based access for document issuers and verifiers. Zero forgery possible. I deliver production-quality, well-documented apps on time, every time. Clear communication, clean architecture, and genuine care for every client project.