Senior Software Engineer · Project & Technical Lead

Neil Patrick Ybañez

Eleven years of production software at Kyocera, from legacy defect investigation through to release deployment. Now building full-stack products end to end.

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Portrait of Neil Patrick Ybañez

Open to work

Experience
11 years
Based in
Cebu, PH
Focus
Full-stack
01

About

I spent eleven years inside a large enterprise codebase: fixing defects in legacy systems, leading version control practice across teams, and shipping tools that run inside printers used by real businesses.

I built USB-to-Wi-Fi connectivity using PJL commands and SNMP OIDs, a content-overlay feature that hides confidential data on printed output, configuration import/export tooling, and firmware-packaging software still used in production releases.

I now build full-stack products on my own: multi-tenant systems on Postgres, AI workflows with real guardrails, and the end-to-end ownership a lead role does not always give you.

02

Experience

2015–2026

Kyocera Document Solutions

Project Lead / Technical Lead / Software Engineer / Patent Liaison

  • Led project execution as Project Lead, coordinating scope, timelines, and technical direction across teams.
  • Investigated and resolved defects in legacy codebases, and led version control practice using SVN, Git, and Perforce.
  • Introduced AI-assisted coding tools into the development workflow for implementation, debugging, and code review.
  • Engineered a USB-to-Wi-Fi connectivity solution for network printers using Printer Job Language (PJL) commands and SNMP OIDs, extending wireless functionality without additional hardware.
  • Built a content-overlay security feature to conceal confidential data on printed and displayed output.
  • Developed an import/export utility for printer configuration settings via Maintenance Mode.
  • Created a user-management tool for administering printer-level user accounts and access control.
  • Maintained firmware-packaging software used to generate the files required for firmware upgrades.

2014–2015

Zeku Technologies Philippines, Inc.

Web / Android Developer

  • Designed and implemented custom features for a Japanese recruitment web platform using ColdFusion and JavaScript.
  • Extended the recruitment platform's reach by developing a companion Android application.
  • Earned Adobe ColdFusion Expert Certification.

Featured build

Tessera

A multi-tenant help desk platform for managed service providers. Client organizations share one Postgres database, kept apart by row-level security, with the whole support loop running on real background jobs instead of blocking requests.

Visit the live app View the code

The Tessera ticket queue, showing tickets across several client organizations with priority, SLA and status labels
The ticket queue: one view across every client, with SLA timers per priority.

  • Isolation you can prove

    Multi-tenant separation enforced in Postgres with row-level security, checked by an automated isolation test suite.

  • AI that stays out of the way

    Ticket review and reply drafting on a background queue with retries, so a slow model never blocks a page load.

  • SLAs that understand business hours

    Deadline maths that walks working hours in any timezone, with automatic breach detection and email digests.

  • A portal each client recognises

    Self-service portal with magic-link auth, per-client theming, and Stripe subscription billing with plan limits.

  • Next.js 15
  • React 19
  • TypeScript
  • Supabase
  • PostgreSQL
  • Drizzle ORM
  • Inngest
  • Stripe

Source is a private repository, access on request

03

Patents

Five inventions filed with the Japan Patent Office as named inventor.

  1. JP2025090467A Information processing device, user authentication system, and user authentication method Filed December 2023
  2. JP2025033561A Image processing device and image forming device Filed August 2023
  3. JP2025028583A Image forming device Filed August 2023
  4. JP2024158509A Information processing device Filed April 2023
  5. JP2019029823A Image processing apparatus, image forming apparatus, and program Filed July 2017
04

Skills

Languages & Frameworks

  • C#
  • .NET
  • Java
  • ColdFusion
  • C/C++
  • JavaScript
  • TypeScript
  • React
  • Next.js
  • Android

Data & Services

  • PostgreSQL
  • Supabase
  • Row-level security
  • REST APIs
  • Stripe
  • Job queues

Tools & Practices

  • Git
  • SVN
  • Perforce
  • Jira
  • Confluence
  • AI-assisted coding
  • Code review

Certifications

  • Adobe ColdFusion Expert Certified
  • PhilNITS FE Passer (FE02-0037)

Education: BS Computer Science, University of the Philippines Visayas Tacloban College