I build real business systems, flagship software, and search-aware web experiences.
My work spans full-stack development, business software, infrastructure, SEO-focused delivery, security-aware implementation, and real-world system ownership. This portfolio is curated to show signal, not filler.
Business systems, not toy apps
I build software around real workflows, approvals, reporting, permissions, and operational ownership.
Search-aware delivery
I can design and improve websites for discoverability, buyer intent, and search-driven business impact.
Product + infrastructure range
From app logic and APIs to hosting, SSL, backups, and deployment discipline, I work across the stack.
Positioning
Builder with product, systems, and search depth
I am strongest when the work sits at the intersection of engineering, operations, visibility, and real business outcomes.
The portfolio is intentionally weighted toward projects that prove architecture, workflow depth, reporting, security thinking, and production-minded delivery instead of generic toy builds.
Best fit roles
Full-Stack Developer, Backend Engineer, Systems / IT Lead, Internal Tools Engineer, SEO-Focused Web Developer, Technical Product Builder
Core proof
Vertex-POS, VitaVault, TrailPulse, CrickInPhSEO, and internal business systems together show both range and depth.
The strongest signal in this portfolio starts with a real product.
Vertex-POS is the strongest example of my full-stack product thinking, backend depth, workflow design, and business-oriented system building.
Vertex-POS
Flagship Retail Operations Platform
A production-minded retail system that goes far beyond checkout. It covers sales, inventory, purchasing, stock counts, cash sessions, receivables, supplier workflows, reporting, permissions, and multi-branch operations.
Deep workflow coverage across checkout, inventory, purchasing, cash handling, and reporting
Strong backend and domain modeling using Prisma and PostgreSQL
Role-aware actions, audit-friendly operations, and business-oriented reporting depth
Why it leads
This project brings together workflow depth, operational logic, reporting, permissions, and full-stack implementation in one system.
Supporting flagship work with product, SaaS, SEO, and internal systems depth.
These projects show additional depth across health-tech, SaaS, SEO, internal systems, and workflow-driven software.
A personal health record platform designed around secure records, care workflows, alerts, documents, dashboards, and future-ready health product architecture.
Why it matters
Demonstrates product strategy, secure data handling, domain thinking, and roadmap discipline.
A polished hike-planning platform with Google OAuth, calendar sync, notifications, background jobs, and security-first full-stack architecture.
Why it matters
Shows SaaS instincts, async workflows, integration work, and cleaner consumer-facing product execution.
A cricket platform tailored for the Philippines, built around keyword targeting, page structure, content architecture, metadata tuning, internal linking, and discoverability.
Why it matters
Proves that I can build for traffic, intent, and business visibility rather than just aesthetics.
A request and workflow system for approvals, assignments, attachments, and operational routing built around real office processes and admin control.
Why it matters
Demonstrates practical business software thinking, access control, and internal systems ownership.
A reporting platform built for employee submissions, manager review, visibility, exports, and analytics in a role-aware operational workflow.
Why it matters
Shows business workflow depth, reporting structure, and delivery for a real internal use case.
Cheque scanning and OCR review system with secure uploads, admin workflows, auditability, and export-oriented processing.
Why it matters
Adds stronger evidence of workflow software, document handling, admin flows, and internal processing systems.
Supporting projects
Additional work that reinforces business tooling, workflow software, reporting, and operational implementation.
Employee Task Management Software
Role-aware task and update system supporting employee operations, file handling, tracking, and structured management workflows.
Engineering, systems ownership, digital execution, and delivery accountability.
My experience is not limited to writing code. It includes building systems, improving operations, managing infrastructure, supporting growth initiatives, and keeping business-critical tech moving.
IT & E-Commerce Business Lead
Pharmastar International Trading Corporation
- Own the design, deployment, maintenance, and protection of business-critical systems spanning software, infrastructure, digital operations, and online retail platforms.
- Build internal PHP/MySQL tools for inventory, quotations, permissions, audit logs, reporting, task workflows, and operational visibility.
- Lead website improvements, SEO-oriented pages, marketplace optimization, and digital visibility work tied to actual business growth.
- Manage Linux/Windows servers, DNS/SSL, backups, DR routines, patching, and least-privilege security practices.
SDE (Backend Developer)
SmartByte Solutions
- Led delivery of a client web platform while handling backend engineering and project coordination.
- Built OAuth-based integrations with TikTok and Meta Ads APIs, including token exchange, refresh handling, and structured ingestion.
- Customized websites in Wix Studio (Velo) with JavaScript logic, dynamic collections, conditional rendering, and API functionality.
- Managed hosting setup, database integrity, system performance, and technical communication with non-technical stakeholders.
SDE L1 Engineer
Hexaroot Solutions
- Handled technical project execution, on-site audits, hardware testing, maintenance, and support coordination.
- Balanced field troubleshooting with stakeholder management and delivery follow-through.
IT Associate Support
Isidro, Redoble & Associates
- Supported internal and client-facing technology initiatives, including surveys, prototypes, QA, documentation, and process improvement.
- Contributed to software ideation, troubleshooting, and operational support across multiple projects.
Information Security Intern
DFI Retail Group
- Worked on security tickets, reporting, vulnerability scans, endpoint protection support, backups, disaster recovery support, and remediation visibility.
- Collaborated with vendors and internal teams to help maintain the confidentiality, integrity, and availability of enterprise systems.
A mix of engineering depth, technical SEO, infrastructure, and business-oriented software delivery.
The goal here is clarity: I am not limited to one lane. I can build, integrate, deploy, optimize, and support systems that matter in real operating environments.
Full-Stack & Product Engineering
SEO, Search & Web Growth
Infrastructure & Delivery
Security & Governance
Business Systems & Operations
Delivery Signal
Additional proof through credentials, academic recognition, and published work.
These signals support the portfolio without distracting from the strongest part of the story, which is still the quality and depth of the projects.
Certificates & Test Scores
Publicly visible proof points
TOEIC Listening and Reading
LinkedIn test score entry
Score: 970 (C1)
TOEIC Speaking and Reading
LinkedIn test score entry
Score: 380 (B2)
Publication
ACM-indexed paper
SenSabong: A sensor-based Application for the aid of training Cocks for CockFighting
Publisher: Association for Computing Machinery (ACM)
Venue: ICCDE '24: Proceedings of the 2024 10th International Conference on Computing and Data Engineering
Published: April 11, 2024
Pages: 133–140
DOI: 10.1145/3641181.3641198
Authors: William P. Rey, Shreyansh M. Jain, Juan Carlos S. Lambino, Zachary Josh T. Raymundo
B.S. Information Technology, Major in Cybersecurity
Mapúa University · 2023
Dean’s List and President’s List Awardee.
HNICEM 2021 Nominee
Academic recognition
Recognized as a nominee for the International Conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environment, and Management.
Best ICT Project
San Beda College Alabang
Awarded during Senior High School STEM studies.
Open to full-stack, backend, systems, SEO-focused, and security-aware opportunities.
I am especially suited for roles where engineering, operations, product thinking, and implementation ownership overlap.
Strongest fit
Full-stack, backend, internal systems, SEO-focused web delivery, and technical product roles.
What I want reviewed
Vertex-POS, VitaVault, TrailPulse, and CrickInPhSEO are the best starting points for understanding my work.
Direct contact
Available for interviews, technical discussions, and roles that need both engineering and delivery ownership.