See the whole system
Connect the network, the workflow, the people, and the customer experience instead of treating them as separate problems.
Zeng Xin Reiner Cheung · Full-stack engineer & IT operator
Systems that work,where work happens.
I plan, build, support, and improve the infrastructure and digital tools businesses depend on—from networks and CCTV to full-stack web platforms, workflows, and client service.
For businesses
ZXR’s IT Solutions
Infrastructure, support, systems, and automation for sites that need technology to keep working.
View business portfolio →For employers and partners
Reiner’s experience
Full-stack delivery, operations judgment, and a career path across software, support, and field work.
View personal portfolio →Infrastructure with accountability.
Software shaped by operations.
Support that stays close to the client.
01 / Personal portfolio
Technical range, grounded in service and responsibility.
Based inAntipolo, Rizal · Philippines
EducationBS Information Technology · Lyceum of the Philippines University
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. I handle technical issues with the same attention I give to updates, documentation, escalation, and the client's next step.
That range helps me see how a technology decision will behave after installation—not only how it looks in a proposal.
Full-stack developmentNetwork operationsNetwork automationProcess automationApplied AI workflowsTechnical supportIssue resolutionClient communicationDocumentation
Operating advantage
Technical depth with an owner's sense of responsibility.
Work close to reality
Move comfortably between field constraints, device configuration, service operations, and the software that supports them.
Build for ownership
Create practical systems, documentation, and support paths that a team can operate after the initial delivery.
02 / Employment history
A career built across software, support, and operations.
From freelance development to enterprise applications and an operator-led IT practice, each role adds another layer to how I diagnose, communicate, and deliver.
- 01Apr 2023 — PresentRegion I, Philippines
ZXR’s IT Solutions
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.
- 02Jan 2024 — May 2025Taguig, NCR
Globe Telecommunications, Inc.
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.
- 03Jun 2023 — Dec 2023Bonifacio Global City, Taguig
Globe Telecommunications, Inc.
Web Developer
Developed internal web applications, reported progress to stakeholders, and provided L3 support for production issues and enhancements.
Leadership & collaboration
Working with groups, not only with systems.
Delivery often depends on coordinating people, clarifying next steps, and keeping momentum across a room—not only configuring devices or shipping code.
Earlier experience+
- 04Feb 2021 — Jun 2022Philippines
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.
- 05Apr 2017 — Apr 2022Remote
Independent practice
Freelance Web / Full-Stack Developer
Gathered client requirements, maintained regular project communication, delivered web systems, and provided responsive troubleshooting and follow-up.
EducationBS Information Technology · Lyceum of the Philippines University
BaseAntipolo, Rizal · Philippines
Development toolkit
Web systems with a practical foundation.
03 / Automation & Applied AI
Practical automation, with language models inside real workflows.
I use automation and language models to reduce repetitive work, organize information, improve support workflows, and help teams move from unstructured requests to practical actions.
Automation capabilities
Confirmed operating patterns—not a generic AI checklist.
Business-process automationScheduled workflowsDocument and media processingNotification and reporting workflowsLLM-assisted content evaluationPrompt and workflow designLogging and error reportingNetwork and RouterOS automationMulti-WAN monitoring and failoverSubscriber data organization
LLM and AI experience
Applied where it helps the process—not presented as magic.
Structured AI workflows
Design reusable n8n pipelines that pass media and context into Gemini Vision for evaluation and caption generation before publishing steps run.
Connected to operations
Treat language-model output as one step inside a larger workflow—paired with storage, logging, and channel posting—rather than as a standalone product.
Visibility when things fail
Route operational tracking and error reporting into Google Drive so failures and run history remain inspectable after a job completes.
AI-assisted build work
Use Codex and Cursor as development assistants on ongoing products such as a hotel and resort website with scheduling, and the BUQUING PCF EMR platform—under human direction and review.
Tools used across this work include MikroTik RouterOS, n8n, Gemini Vision, Google Sheets, Google Drive, Facebook and Instagram posting paths, Codex, and Cursor.
Selected automation and LLM projects
Operational systems and ongoing builds, with their status made clear.
Featured workflow · Multi-platform publishing pipeline
- InputImage assets
- Automationn8n workflow
- Logic / LLMGemini Vision
- Human reviewDrive logs
- OutputFB / IG posts
Human review here means inspectable Google Drive logs and error reports—not a confirmed approval gate before every post.
Operational
Network & RouterOS automation
Sites can monitor gateways, fail over across WAN links, balance connections, and apply scripted topology cleanups instead of rebuilding rules by hand each time.
View project detailsClose project details+
Operational
Network & RouterOS automation
- Problem
- Multi-WAN sites needed dependable gateway monitoring, balanced traffic distribution, and cleaner migrations between provider topologies without manual rule churn on every change.
- Solution
- MikroTik RouterOS Netwatch scripts with Mangle rules for real-time gateway monitoring and multi-WAN failover on RB5009 and hEX hardware; PCC load-balancing with FQ_CoDel queues to reduce bufferbloat; plus scripts that migrate topologies (for example PPPoE service setups to flat LAN bridges) and clean obsolete rules.
- My contribution
- Designed, wrote, and applied the RouterOS monitoring, mangle, PCC, QoS, migration, and cleanup scripts in live network contexts.
- Human controls
- Failover behavior is defined in scripted monitoring rules, while broader change windows and field validation remain operator-led.
Operational workflow
Multi-platform publishing pipeline
Image evaluation, caption drafting, cross-posting, and run logging are handled in one automated pipeline instead of disconnected manual steps.
View project detailsClose project details+
Operational workflow
Multi-platform publishing pipeline
- Problem
- Publishing images across Facebook and Instagram required repeated manual evaluation, caption writing, posting, and scattered run history.
- Solution
- An n8n workflow that uses Gemini Vision to evaluate images and generate captions, then automates cross-posting to Facebook and Instagram, with Google Drive used for log storage, operational tracking, and error reporting.
- My contribution
- Built and configured the n8n workflow, Gemini Vision steps, social posting path, and Drive-backed logging and error reporting.
- Human controls
- Google Drive captures logs and error reports so completed and failed runs remain available for operator review.
Operational
Subscriber management sheets
Subscriber information can be logged and organized by coverage zone in a shared, structured workbook instead of ad-hoc lists.
View project detailsClose project details+
Operational
Subscriber management sheets
- Problem
- Subscriber records across different service coverage zones were hard to keep organized as the service footprint grew.
- Solution
- Structured Google Sheets systems that log, organize, and manage subscriber data by coverage zone.
- My contribution
- Designed the sheet structure and automation patterns used to keep subscriber data organized by zone.
- Human controls
- Sheet-based records remain directly editable and reviewable by the operators responsible for subscriber information.
Additional ongoing workflows+
Ongoing
Hotel & resort site and EMR build assistance
AI tools accelerate drafting and iteration; they do not replace engineering ownership, testing, or release approval.
View project detailsClose project details+
Ongoing
Hotel & resort site and EMR build assistance
- Problem
- Active product work—hotel and resort web scheduling surfaces, and the BUQUING PCF EMR platform—still needs steady implementation under real delivery constraints.
- Solution
- Ongoing development assisted by Codex and Cursor for the hotel and resort website with scheduling, and continued EMR platform work, with humans directing scope, review, and release decisions.
- My contribution
- Uses Codex and Cursor as assistants while designing, implementing, and iterating product features; final judgment and validation stay with the engineer and stakeholders.
- Human controls
- Human-directed development and review. BUQUING modules remain subject to UAT, clinic validation, restore testing, and production approval as already stated elsewhere on this site.
Responsible implementation
Keep people in the loop where decisions matter.
- Human validation for important decisions and product releases
- Structured inputs and outputs inside workflows
- Clear error paths, logging, and inspectable run history
- Care with confidential or personal information in shared tools
- Testing against realistic examples before relying on a path
- Documentation so teams can keep operating the process
- No unsupported AI claims or invented metrics
04 / Business portfolio
One technical partner from connection to operation.
ZXR's IT Solutions brings infrastructure, connectivity, security, software, and support into one practical service for businesses and communities that need technology to keep working.
01
Infrastructure and support
Networks, CCTV, connectivity, and the support path that keeps sites workable after install.
- Connected infrastructureNetworks built to be operatedISP and local network planning, GPON / OLT / ONU configuration, MikroTik and PPPoE setup, rollout support, and troubleshooting.
- Security & connectivityCoverage where work happensCCTV planning, long-distance connectivity assessment, Starlink packages, site networking, and dependable client support.
02
Web systems and integrations
Portals, scheduling, attendance, quotation flows, media servers, and websites shaped around real operations.
- Business systemsWorkflows made digitalCustom portals, clinic and kiosk experiences, attendance tools, quotation workflows, media servers, websites, and process automation across operations.
03
Automation and applied AI
RouterOS and process automation, n8n publishing workflows, Gemini Vision steps, and sheet-based operations tracking.
- Network automationFailover and traffic controlMikroTik Netwatch, Mangle, PCC, and FQ_CoDel scripts for monitoring, multi-WAN failover, and cleaner topology migrations.
- Workflow automationRepeatable publishing and loggingn8n pipelines with Gemini Vision evaluation and caption generation, social posting paths, and Google Drive run logs.
Plan the system. Configure the details. Stay for the support.
See the operating range05 / Featured work
Three strongest proofs, with an archive of earlier web systems.
Related operating work in Automation & Applied AI—RouterOS failover and traffic control, n8n publishing with Gemini Vision, subscriber sheet systems, and ongoing Codex/Cursor-assisted product builds including scheduling and EMR.
FACILITY OPERATIONS
Role-aware portalToday at a glance
Active development · Healthcare systems
BUQUING PCF operations platform
- Problem
- A clinic network needed one public surface and multi-role operations across patients, doctors, staff, facility admins, and super admins.
- Contribution
- Building the public website and role-aware operations platform across scheduling, queues, clinical surfaces, and supporting modules.
- Solution
- A Vue 3 / Laravel / Sanctum / MySQL system with multi-facility scheduling, online booking, walk-ins, queue operations, identity review, notifications, and role-based portals.
- Verified result
- Selected modules remain in active development and are subject to human UAT, clinic validation, restore testing, and production approval.
Operational
Network & RouterOS automation
- Problem
- Multi-WAN sites needed dependable gateway monitoring, balanced traffic distribution, and cleaner migrations between provider topologies.
- Contribution
- Designed, wrote, and applied RouterOS monitoring, mangle, PCC, QoS, migration, and cleanup scripts in live network contexts.
- Solution
- Netwatch plus Mangle failover on RB5009 and hEX, PCC load-balancing with FQ_CoDel queues, and scripts that migrate topologies and remove obsolete rules.
- Verified result
- Sites can monitor gateways, fail over across WAN links, balance connections, and apply scripted topology cleanups instead of rebuilding rules by hand.
Operational workflow
Multi-platform publishing pipeline
- Problem
- Publishing images across Facebook and Instagram required repeated manual evaluation, caption writing, posting, and scattered run history.
- Contribution
- Built and configured the n8n workflow, Gemini Vision steps, social posting path, and Drive-backed logging and error reporting.
- Solution
- An n8n workflow that evaluates images and drafts captions with Gemini Vision, posts to Facebook and Instagram, and stores logs in Google Drive.
- Verified result
- Image evaluation, caption drafting, cross-posting, and run logging are handled in one automated pipeline instead of disconnected manual steps.
Web project archive
Earlier platforms, preserved as documented.
Browse archive +
Web project archive
Earlier platforms, preserved as documented.
These screenshots come from the supplied historical portfolio deck. They are presented as archived work, not current live-product claims.
Open project board ↗01
Talent platform
Meeja
A Philippines talent database designed to connect talents and producers, with registration, profiles, discovery, dashboards, FAQs, and contact surfaces.
Open project board ↗02
Content scheduler
Smart Bulletin
A campus dashboard for creating and scheduling announcements, posters, and advertising content across LED and television displays.
Open project board ↗03
Education platform
Brightways School System
A role-based system for administrators, teachers, and students to manage records, schedules, calendars, assessments, and assignments.
Open project board ↗04
Private event platform
Toyota launch event system
A private launch experience with unique-code entry, live-event viewing, audience comments, surveys, and downloadable media and press kits.
Also documented
YouAndI
An end-to-end e-commerce shop included in the historical project record; no project screenshot was supplied in the source deck.
Infrastructure operations
Local ISP & network delivery
Hands-on work across access networks, subscriber provisioning, performance profiles, troubleshooting, maintenance advisories, and client support.
Applied software
Tools built around real workflows
Practical software for clinics, schools, content teams, events, and small businesses—shaped around the work people already need to do.
Built from available evidence: this portfolio uses the supplied résumé, historical project deck, brand assets, and confirmed project context. It avoids invented client counts, revenue, uptime, project outcomes, and testimonials.
How the work moves
From the requirement to the running system.
- 01
Assess
Map the site, users, risks, and real operating need.
- 02
Architect
Choose the right network, hardware, and software path.
- 03
Implement
Configure, build, test, document, and hand over.
- 04
Support
Monitor the service and respond when reality changes.