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.
View all servicesArchitecture 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 reviewTechnical 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 advisoryDelivery 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 sprintMonorepo systems in public
The portfolio is framed as one coherent product system instead of a shelf of disconnected demos.
Browse projectsapps/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.