liekoo@build
~/portfolio $ whoami

BS IT undergrad who ships ROMs, and Web Apps.

Cristian (Liekoo) — 4th-year Information Technology student, irregular student at East Systems Colleges of Rizal. Career shifter from BS Accounting to BS IT, exposed to Android development maintaining device tree structure for the Redmi Note 13 4G (sapphire) on Evolution X and Project Infinity X, plus full-stack HTML/CSS/JavaScript and PHP/MySQL web development projects for local businesses.

4th yr
BS IT
1
Web app shipped
1
Device maintained
2
ROMs supported
01 / web applications
a13fce2 AquaLuxe — Water Refilling Station Management System
deployed
Full PHP/MySQL operations platform for a water refilling business: customer ordering, staff and admin order management, batch delivery dispatch, and proof-of-delivery upload. Integrated PayMongo for GCash and QR Ph payments so customers can pay online end to end.
PHPMySQLPayMongo APIGCashQR Ph
+ online payments + delivery dispatch + proof-of-delivery
02 / android · sapphire (Redmi Note 13 4G)

Volunteer Android developer for sapphire (SM6225 / Bengal SoC), shipping Evolution X and Project Infinity X to a global Android community of thousands of users. Responsibilities include ongoing maintenance of device trees, kernel patches, and vendor HAL integration including under-display fingerprint sensor (UDFPS) support.

Redmi Note 13 4G/NFC Resources
public repositories
Device tree, kernel, and vendor resources for sapphire (SM6225/Bengal), shared with and maintained alongside the lycodump organization.
CC++JavaPythonShellSmali
feat
FastCharge system app (com.android.fastcharge)
Built and adapted a kernel-based charging node specifically for sapphire, originally using other devices as a base, with a persistent START_STICKY service to work around a kernel JEITA_VOTER reset that kept reverting the charge mode.
perf
powerhint.json / scheduler tuning
Tuned WALT and uclamp behavior following SD680-class conservative mid-table frequency anchoring, and diagnosed audio crackling tied to power state transitions.
feat
UdfpsHandler.cpp — under-display fingerprint sensor
Adapted an existing UDFPS handler implementation and integrated it into sm6225-common, bridging the vendor fingerprint HAL with AOSP's display-side UDFPS overlay so the in-display sensor responds correctly on our platform.
view commit →
03 / about
Background

4th-year BS Information Technology student at East Systems Colleges of Rizal, based in Rizal, Philippines. Came into IT from an accounting background, which still shapes how I approach structured, numerical problems.

Currently preparing for an IT internship — exploring Coding/Networking side of the industry and refining how I present this work to recruiters.

How I work

Most of my Android work consists of interacting high-end servers used for compiling operating systems funded by the community, and much of my daily work is debugging back-end android operating system components, adding new features, reverse-engineered blobs and closed-source frameworks.

On the web app side, I prefer shipping something a real business can use immediately use: Inventory management, live payments, real delivery workflows, not just demos.

04 / Contact