Full-stack systems
Web applications, role-aware portals, APIs, databases, integrations, and production issue resolution.
Personal portfolio · Zeng Xin Reiner Cheung
Engineer across systems, operations, and people.
I build and support the networks, web systems, automations, and practical tools that teams depend on—while staying responsible for communication, documentation, and the next step.
Based in
Antipolo, Rizal · Philippines
Full-stack engineer
IT operator
Automation builder
IT operator
Automation builder
Working perspective
Technical range grounded in service and responsibility.
I am at my best when a technical problem also needs business judgment and clear communication.
My background spans full-stack engineering, internal business applications, PHP development, ISP operations, field connectivity, security systems, and customer care.
That range helps me understand how a technology decision behaves after installation—not only how it looks in a proposal or development environment.
Network operations
MikroTik, RouterOS scripting, GPON, PPPoE, multi-WAN, CCTV, field troubleshooting, and customer support.
Automation
n8n workflows, scheduled jobs, structured sheets, media processing, reporting, and inspectable error paths.
Applied AI
LLM-assisted workflow steps, Gemini Vision evaluation, prompt design, and human-directed Codex and Cursor development.
Employment history
A career across software delivery and operating reality.
ZXR was developed alongside later employment, combining independent client delivery with professional engineering work.
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Apr 2023 — Present
ZXR's IT Solutions · Region I
Lead IT Engineer / Client Support
Leads client support across IT, network, and business solutions—from connectivity and access troubleshooting to project updates, service follow-ups, and clear resolution paths.
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Jan 2024 — May 2025
Globe Telecommunications · Taguig
Software Engineer (Full-Stack)
Supported business applications, resolved defects, improved reliability, coordinated with internal teams, and maintained clear records of issues, fixes, and development updates.
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Jun 2023 — Dec 2023
Globe Telecommunications · Taguig
Web Developer
Developed internal web applications, reported progress to stakeholders, and provided L3 support for production issues and enhancements.
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Feb 2021 — Jun 2022
Global Quest Consulting Group
Web Developer / PHP Developer
Delivered projects from planning through implementation and support while maintaining databases, improving data quality, and resolving system issues.
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Apr 2017 — Apr 2022
Independent practice · Remote
Freelance Web / Full-Stack Developer
Gathered client requirements, maintained project communication, delivered web systems, and provided responsive troubleshooting and follow-up.
Automation & applied AI
Models are one step inside the workflow—not the whole system.
My work connects structured inputs, automation logic, AI-assisted evaluation, storage, logging, and operator review.
01InputImage assets
02Automationn8n workflow
03LLM stepGemini Vision
04Logging & reviewDrive records
05OutputFB / IG path
Operational
Network & RouterOS automation
Netwatch, Mangle, PCC, FQ_CoDel, multi-WAN monitoring, failover, and repeatable migration scripts applied in live network contexts.
What I contributed
Designed, wrote, and applied the monitoring, traffic-control, migration, and cleanup scripts. Change windows and field validation remained operator-led.
Operational workflow
Multi-platform publishing pipeline
n8n plus Gemini Vision for image evaluation and caption drafting, connected to social posting paths and Google Drive logs.
What I contributed
Built the workflow, prompt steps, posting path, and inspectable logging and error reports. A pre-publication approval gate is not claimed.
Operational
Subscriber management sheets
Structured Google Sheets systems for logging and organizing subscriber records by service coverage zone.
What I contributed
Designed the workbook structure and patterns while keeping records directly editable and reviewable by responsible operators.
Ongoing
AI-assisted product development
Codex and Cursor used as development assistants on scheduling surfaces and the BUQUING PCF platform.
How responsibility is handled
AI tools support drafting and iteration. Scope, engineering judgment, testing, stakeholder validation, and release approval remain human-led.
Selected project archive
Earlier platforms, preserved as documented.
These boards come from the supplied historical portfolio deck and are shown as archived work rather than current live-product claims.
Open project board ↗
Talent platform
Meeja
Registration, talent profiles, discovery, dashboards, FAQs, and contact surfaces for talents and producers.
Open project board ↗
Content scheduler
Smart Bulletin
A dashboard for scheduling announcements, posters, and advertising content across LED and television displays.
Open project board ↗
Education platform
Brightways School System
A role-based system for records, schedules, calendars, assessments, and assignments.
Open project board ↗
Private event platform
Toyota launch event system
Unique-code entry, live-event viewing, audience comments, surveys, and downloadable press materials.
Working toolkit
Selected tools, grouped by the job they support.
Development
PHP, Laravel, CodeIgniter, JavaScript, Node.js, HTML, CSS, C#, MySQL, and PostgreSQL.
Infrastructure
MikroTik, RouterOS, GPON, OLT/ONU, PPPoE, multi-WAN, PCC, CCTV, and Starlink.
Automation & AI
n8n, Gemini Vision, Google Sheets, Google Drive, Codex, Cursor, logging, and documentation.
Employment · Collaboration · Projects
Let's talk about the work that needs doing.
For engineering roles, technical collaboration, project delivery, or a practical systems problem, send a short note with the context and desired outcome.