Product & Project Manager | Junior iOS Developer | Android Developer

Hi, I'm Elliezer!

A tech enthusiast since I was 10, now a Product & Project Manager helping teams turn ideas into useful products. I've freelanced since 2024, with hands-on experience building native iOS, watchOS, and Android apps. I care about the small details that make a product feel effortless to use.

Most of what you'll see here started at the Apple Developer Academy, from image processing and ML to AR and Apple Watch companions. My freelance projects are mostly under NDA (I really wanted to tell you guys about it, seriously).

Elliezer Christian Evan Sagena

Selected work

All projects →
Tactura screenshot

Tactura

2026

Role: Pipeline & on-device ML.

Key Responsibilities: Conversion Pipeline, On-Device Core ML, and Interactive RealityKit Preview.

An iPadOS app that for the Apple Developer Academy’s Challenge 5 "Community Challenge" collab with Black Hand Gang, with a goals to help making an access for visually impaired audiences to FEEL visual artwork. In a simple way, Tactura converts 2D visual artwork into 2.5D tactile reliefs that can be 3D-printed directly and felt.

SwiftSwiftUIiPadOSCore MLRealityKitOpenCVPython
Tactura screenshot
Pourfect: AR Latte Art screenshot

Pourfect: AR Latte Art

2026

Role: Developer (Presentation Layer).

Key Responsibilities: UI Translation from Design to Code, AR Tracking, and GPU-Accelerated Fluid Simulation.

An augmented-reality iOS app that teaches latte art that built on Challenge 4 from the Apple Developer Academy with technology-first approach with AR as the base feature for the app.

Pourfect uses AprilTag fiducial tracking to lock onto the cup and pitcher, then overlays a real-time, GPU-accelerated fluid simulation so you can practice pours — Heart, Tulip, Rosetta — with any liquid and get instant visual feedback. Built after pivoting from ML-based object tracking to robust, zero-training 6DoF geometry.

SwiftARKitMetalKitVisionAprilTags
Pourfect: AR Latte Art screenshot
Zony screenshot

Zony

2026

Role: Tech Lead, System Architect, and Developer

Key Responsibilities: System Architecture, Database Design, Tech Timeline Management, and TestFlight Distribution.

A dual-platform experience spanning iPhone and Apple Watch, built for the Apple Developer Academy’s “From Pieces to Product” challenge. Zony empowers parents of asthmatic children to keep their kids active by providing real-time tracking of oxygen saturation and heart rate, allowing parents to monitor their child’s health data remotely.

SwiftSwiftUIwatchOSiOSHealthKitServerlessnode.js
Zony screenshot
ODD screenshot

ODD

2025

Role: Android Developer and Project Manager

Key Responsibilities: Project Management, Native Android Development, Business Logic Translation, and Payment Gateway Integration.

A native Android marketplace app built entirely in Kotlin for a Indonesian perfume brand called ODD. Built with Jetpack Compose, MVVM architecture, and a clean code approach. The app features a product catalog, shopping cart, and checkout process, providing users with a seamless shopping experience. Implemented payment gateway using Xendit, and integrated email notifications for order updates. The app is designed to be responsive and user-friendly, with a focus on performance and scalability.

KotlinAndroidGradleJetpack ComposeMVVMXendit
ODD screenshot