Software Engineer at MediaJel
CTO & Co-Founder at Zentech Inc.
I build the software behind the counter at a Philippine barangay hall: document requests, permits, payments, the paperwork that used to cost a morning in a queue. At MediaJel I build the ETL pipelines underneath nine million tracked users, Snowplow into Snowflake and ClickHouse, orchestrated with Airflow. I build open-source tools that people install by the hundred thousand.
BarangayOS and BPLS OS
2 barangays, 2 local government units
Ipil, Zamboanga Sibugay
Nobody handed me any of this.
Five years in Silicon Valley ad-tech, written from Cebu.
MediaJel is a Bay Area company in Walnut Creek, California, 11,331 km from my desk. Since 2021 I have been building its ETL pipelines: Snowplow events into Snowflake and ClickHouse, orchestrated with Apache Airflow.
MediaJel. Five years, still there.
Growing daily. 15.8 TiB on disk at 21.8x compression.
Materialized views over the hot paths.
Moving the pipelines off Snowflake onto ClickHouse.
The operating system for barangays
Digital governance for the smallest unit of Philippine government. Residents request documents, pay fees and track every step from their phone; staff run records, finance and announcements from one dashboard. Free for every barangay, forever.
Balud, Samar · Banilad, Negros Oriental
Portal, admin, mobile, kiosk
Your music. Your server. Every device.
A self-hosted music suite on top of a Navidrome library, an Apple-Music-grade player for web, desktop and mobile, with automated in-place FLAC upgrades, cross-library deduplication, playlist migration and cross-device handoff.
Web · desktop · iOS · Android
Published from the release channel
A Filipino software company modernizing how local government serves the people who live under it.
I co-founded Zentech in September 2025 and run its engineering. We build for barangays, municipalities and cities, the layers of Philippine government that people actually queue at. Two products are in production; both were designed with the officials who have to use them every day.
LatestBarangay OS officially launches in Barangay Banilad, Bacong, Negros Oriental
Generics are the feature that separates TypeScript you can maintain from TypeScript you rewrite. From the identity function through constrained generics and typed API responses.
Setting up an ESM-compatible TypeScript project and wiring in the chatgpt-prompts library, the walkthrough for my most-starred repository.
VS Code Server in private preview, what it does, what GitHub auth and port forwarding mean for it, and how to self-host the whole thing on a home lab.
Compile a React application into a single Go binary that runs on any operating system, with an Echo API server alongside it. One file to ship.
Building something a city has to run on?
