ELE Store — EV Parts & Batteries Mobile App

Designed and developed ELE Store, a client Android application for an electric-vehicle batteries and vehicle-parts marketplace. The goal was a clean, modern shopping experience that feels premium and easy to use—similar to high-end retail apps—while staying focused on EV-specific products like lithium battery packs, chargers, motors, brake kits, and charging cables.

The product UI/UX was first prototyped in Figma with a full screen flow: onboarding, home discovery, category browsing, search & filters, product details with variants (voltage/capacity), cart, checkout, favorites, profile, and notifications. The visual system uses a deep forest-green brand palette, electric accent highlights, rounded product cards, and a floating bottom navigation bar for a polished native feel.

Built in Android Studio with Kotlin, following Material Design patterns and a modular screen architecture. Implementation included Jetpack Navigation for multi-screen flows, ViewModel + StateFlow for cart and favorites state, RecyclerView/Compose-friendly product grids, and local mock data (no live backend) so the client could review a fully interactive UI build. Additional Android stack elements: XML/Compose layouts, Glide/Coil-ready image placeholders, and responsive mobile layouts optimized for modern handsets.

Deliverables: production-ready UI screens, clickable navigation, add-to-cart / wishlist interactions, promo-code checkout flow, and a client-ready Android prototype suitable for investor demos and further API integration.

Mock data now, real API later is the right call for an investor-ready prototype, speed matters more than correctness at that stage. The part worth locking early is the StateFlow contract shape, if the mock repository returns the same fields and error states the real endpoint...

NEW CASE STUDY! 🙌 E-Strum: App + Device for Tracking Light Availability at Home

ABOUT THE APP: Scheduled and unscheduled power outages in Ukraine made it hard for people to plan their day. The client wanted a hardware device paired with a mobile app that detects light presence in a room and builds analytics from it — so people could plan around real outage patterns, not guesswork.

THE CHALLENGE: - Take E-Strum from concept to a working hardware + software product:

- Ship secure OTA firmware updates (CI/CD, embedded flashing code, secure distribution server).

- Handle high device load without degrading service.

THE PROCESS: - Ran discovery first - locked requirements before build, since hardware mistakes are far costlier to fix late than software ones.

- Tackled the riskiest unknowns early - OTA firmware and device-connection logic went first, ahead of UI work.

- Split hardware and backend workstreams in parallel, with device registration/events as the shared contract between them.

THE RESULTS - Rolled out OTA firmware updates to 1,000+ connected devices with zero manual re-flashing required 💯

Kept backend response times under 300ms even as concurrent connected devices scaled past 1,200 🙌

Held device-connection success rate at 97%+ on first attempt under real-world Wi-Fi conditions 🧠