Product engineer, platform builder, and systems thinker

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The public shell for a reusable product platform spanning admin, SaaS, commerce, operations, and content workflows.

Guy Romelle Magayano

This portfolio frames a product-focused monorepo built around shared platform foundations, production-style demos, and practical engineering case studies.

Based in New York City, NY

What I help with

Strategic review, ongoing advisory, and direct implementation for product systems that need stronger frontend and platform shape.

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Architecture Review

A focused audit of your frontend or product platform: structure, boundaries, delivery risks, and the changes that will create the most leverage.

  • Codebase and architecture review
  • A prioritized remediation plan
  • A working session to align next steps
Start a review

Technical Advisory

Ongoing product and platform guidance for teams that need strong engineering judgment without hiring a full-time staff-level lead immediately.

  • Architecture and design reviews
  • Async guidance on implementation direction
  • Ongoing input on standards and system boundaries
Discuss advisory

Delivery Sprint

A fixed-scope implementation sprint for high-leverage work like navigation refactors, design system foundations, CMS delivery layers, or portfolio/platform restructuring.

  • Scoped implementation plan
  • Hands-on code and architecture changes
  • Verification and handoff notes
Scope a sprint

Monorepo systems in public

The portfolio is framed as one coherent product system instead of a shelf of disconnected demos.

Browse projects

apps/portfolio

Guy OS

The public shell for the entire portfolio monorepo, designed to frame products, reusable systems, and case studies as one coherent platform story.

  • Branding restraint and frontend quality
  • Case study storytelling and SEO
  • A clear entry point into the broader platform

apps/saas-demo

TaskFlow

A multi-tenant SaaS app that shows product engineering depth across accounts, teams, permissions, billing, events, and automation.

  • Multi-tenant application modeling
  • Product-grade data relationships
  • Full-stack delivery with clear UX tradeoffs

apps/commerce-demo

CartForge

A commerce-focused surface for catalog, cart, checkout, fulfillment, and transaction-state orchestration.

  • Commerce flows and transactional states
  • Pricing, checkout, and order thinking
  • High-friction UI paths handled pragmatically

Need a clean next step?

If the product needs stronger system boundaries, reusable UI, or clearer delivery direction, start with the hire flow and I’ll help narrow the next move.