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DaChelimo/README.md

Hi, I'm Andrew Chelimo πŸ‘‹

BSE in AI & MSE in Robotics @ UPenn | Android Developer | Kotlin & Jetpack Compose Enthusiast

πŸš€ About Me

I specialize in Android development, building high-performance, user-centered apps with Kotlin and Jetpack Compose. I love optimizing app speed, memory, and UI/UX while creating features that delight users. Outside development, I enjoy cycling 🚴, volunteering πŸ‘¨β€πŸ«, table tennis πŸ“, and nature walks 🌿.

πŸ’» Android Skills

Languages: Kotlin, Java, Python
Frameworks & Tools: Jetpack Compose, Compose Multiplatform, Firebase, Retrofit, Room, Glide, Koin
Certifications: TripleByte Certified Android Engineer, SoloLearn HTML/CSS

πŸ›  Android Projects

Whisper – Real-Time Chat App

πŸ’¬ An offline-first, real-time messaging application built on a modern, scalable architecture.
⚑ Features: Media (audio, camera, and video) sharing, Stories, Send, Edit & Unsend message functionality
πŸ’» Tech stack used: Firebase Auth, Storage & FireStore, Koin DI
🎨 UI inspired by Instagram + WhatsApp for smooth, intuitive navigation.

Sky Weather – Weather Forecast App

πŸ’¬ A modern weather application with over 1,000 downloads and a 5.0-star rating on the Google Play Store.
⚑ Features: Current, hourly, and daily forecasts; 3 different theme modes (Light, Dark, and Black), Location detection
πŸ’» Tech stack used: Room, Retrofit, Google Maps SDK, DataStore, Hilt DI, WorkManager
🎨 Recently completed a UI migration from XML to Jetpack Compose, which reduced UI-related bugs by 60% and improved feature development speed.
🍳 Optimized startup performance by 40% by implementing a dynamic caching strategy with Room and efficient RESTful API calls using Retrofit.

Trecipe – Recipe App (Kotlin Multiplatform)

πŸ’¬ A cross-platform recipe discovery app targeting Android and iOS from a single codebase.
🌍 Built with Kotlin Multiplatform and Compose Multiplatform to share business logic and UI, demonstrating expertise in modern cross-platform development.
🎨 Optimized network and image loading performance to deliver a fluid, highly responsive user experience with smooth scrolling and fast search capabilities.
πŸ’» Tech stack used: Room for offline caching, Koin DI

πŸ“ˆ Weekly development breakdown

Kotlin            5 hrs 5 mins    β–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–“β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘   66.76 %
XML               1 hr 14 mins    β–ˆβ–ˆβ–ˆβ–ˆβ–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘   16.32 %
TOML              28 mins         β–ˆβ–“β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘   06.16 %
YAML              22 mins         β–ˆβ–’β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘   04.87 %
EditorConfig      10 mins         β–“β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘   02.26 %

Pinned Loading

  1. TikTok-Clone TikTok-Clone Public

    A beautifully designed replica of the famous and trending TikTok app

    Kotlin 80 38

  2. Octagon-Technologies/Sky_Weather Octagon-Technologies/Sky_Weather Public

    πŸ”₯ A highly advance featured weather app in android using Kotlin

    Kotlin 1

  3. Octagon-Technologies/Trecipe Octagon-Technologies/Trecipe Public

    A great recipe app based on Tasty for the Play Store

    Kotlin 2

  4. Instagram-Clone Instagram-Clone Public

    A replica of the famous Instagram ~~ hopefully my servers won't go down :)

    Kotlin

  5. Whisper Whisper Public

    Beautifully designed chat app || Made with Compose

    Kotlin 2

  6. ChatAir ChatAir Public

    πŸ”₯ A highly advance featured chat app in android using Firestore and Kotlin

    Kotlin 4 2