About | Guy Romelle Magayano

About

The senior engineering profile behind the work.

Background, recent roles, working principles, and the kind of product and platform judgment I bring to hiring teams, clients, and collaborators.

(About)

Systems work is clearest when the product, platform, and release path line up.

This profile page gives hiring teams, collaborators, and clients the background, work history, and operating principles behind the portfolio.

The throughline across the roles below is the same: make the product surface, platform shape, and delivery path easier to reason about under real shipping pressure.

The full public profile lives on LinkedIn instead of a downloadable resume artifact.

Focus

Focus areas

The kinds of product and platform work I am usually brought into when systems need sharper structure, safer delivery, or clearer ownership.
Full-Stack Platform Engineering That Helps Teams Ship FasterE-Commerce and CMS Architecture Built for Growth and ChangePerformance and Release Reliability Customers Can FeelTesting and Quality Systems That Reduce Delivery RiskTechnical Leadership That Creates Clarity and MomentumAccessibility and SEO That Strengthen Reach From Day One

Profile

Work history

The experience timeline lives here so employers and clients can review the same operating history in one place.

Founder and Principal Consultant

Stack Market Labs

2023 - Present

Lead an independent consulting practice focused on platform modernization, operational tooling, release safety, and product engineering work across live business systems.

  • Led software development across 3 simultaneous client projects spanning 4 business domains, supporting 3-4 monthly releases without disruptive rewrites.
  • Overhauled event-driven workflows with replay tooling and resolved 15 critical payment reconciliation issues within the first month of one engagement.
  • Modernized 6 legacy admin workflows with automated tests, CI gates, and release checks, cutting critical post-release bugs by 50%.

Full Stack Developer / Consultant

IONA Commerce

2024 - 2025

Delivered localized commerce storefront work across Next.js, Sanity, and commercetools with emphasis on revenue-critical flows, performance, testing, and CMS alignment.

  • Delivered PLP, PDP, cart, checkout, and account flows for a localized storefront across 35+ online markets.
  • Tightened validation, retry behavior, and server-side pricing checks across 4 revenue-critical funnels, reducing recurring checkout and promotion support load by 20% to 35%.
  • Applied ISR and route-level code splitting on PLP, PDP, and campaign templates, lifting Lighthouse scores by 8 to 12 points and reducing LCP by 15% to 25%.

Senior WordPress Engineer

X-Team

2023 - 2023

Modernized WordPress VIP publishing systems for high-traffic media brands, improving React modules, performance, release confidence, and developer onboarding.

  • Modernized WordPress VIP plugins and blocks with refactoring and Webpack builds, trimming asset payload by 10% to 20% across 2 high-traffic publishing brands.
  • Engineered reusable React-based video modules that improved mobile storytelling and increased video play rates by 15%.
  • Established PHPUnit, Cypress, and CI gates across critical publishing flows while reducing release and support friction by 20% to 30%.

Team Lead / Senior Full Stack Engineer

Epic Design Labs (via MultiplyMii)

2020 - 2023

Led architecture and full-stack delivery across multi-tenant SaaS, SEO analytics, GraphQL product systems, and headless commerce platforms.

  • Directed system architecture and code reviews across three teams, improving code quality scores by 15% and cutting critical bugs by 45%.
  • Led the AWS-backed delivery of a multi-tenant SEO platform handling millions of URLs monthly, lowering crawl intervention by 40%.
  • Defined headless commerce architecture across BigCommerce, Optimizely, and Gatsby.js, lifting Lighthouse scores by 8 to 15 points and cutting editorial handoffs by 30% to 50%.

Full Stack Developer / WordPress Engineer

MAKE Interactive

2019 - 2020

Built WordPress and full-stack product systems across performance optimization, CRM integration, reusable React modules, and content-heavy platform work.

  • Strengthened WordPress performance with Redis, CDN, and asset optimizations, improving cache efficiency by 15% to 30%, Lighthouse by 10 to 18 points, and LCP by 15% to 30%.
  • Replaced manual CRM handoffs with a Salesforce integration using WordPress REST API endpoints, queued sync, retries, deduplication, and admin logs, reducing common sync intervention by 40% to 60%.
  • Developed 15 reusable React SaaS modules for authentication, user profiles, and data visualization, improving maintainability and team velocity while pushing test coverage to 90%.

Web Developer (Freelance)

Orth Enterprises, LLC

2019 - 2019

Delivered scoped freelance web work across Hugo static sites and targeted Shopify storefront customizations with an emphasis on maintainable implementation.

  • Delivered freelance web work across Hugo static-site builds and scoped Shopify customizations during the same engagement window.
  • Used reusable templates and partials to support maintainable page delivery and faster repeated implementation across content-driven pages.
  • Extended Shopify behavior through targeted storefront changes without pushing the client into unnecessary platform rework.

WordPress Developer

Outsourcing Wizards

2019 - 2019

Built reusable WordPress solutions for property-focused websites with plugin architecture, Gutenberg blocks, search behavior, and map-based discovery flows.

  • Built reusable WordPress solutions for property sites, including a domain-specific plugin with AJAX and REST endpoints, Leaflet.js maps, and Gutenberg blocks.
  • Improved editor self-service and reduced repeated bespoke build work through reusable block patterns and a shared theme foundation.
  • Helped make property search and map-based discovery faster and more repeatable across multiple client deployments.

Website Designer / Website Developer

Krush Digital

2018 - 2018

Supported distributed website delivery across frontend implementation, hosting operations, amendment cycles, and client reporting in a remote UK-time workflow.

  • Supported distributed website delivery across hosting operations, frontend implementation, and client amendment cycles in a UK-time workflow.
  • Handled recurring PSD-to-web implementation and revision work while maintaining structured daily reporting on blockers, output, and support needs.
  • Kept infrastructure-side setup, domain work, and page delivery aligned so operational tasks did not become launch blockers.

WordPress Engineer

Infosoft Studio

2014 - 2018

Built and maintained long-lived WordPress systems for public-sector websites, with strong emphasis on accessibility, security, SEO, and maintenance automation.

  • Raised accessibility scores by 10 to 20 points with WCAG-aligned patterns across priority public-information templates.
  • Reduced manual maintenance by 20% to 35% through role reviews, reusable modules, and WP-CLI automation.
  • Lowered outage and support friction by 20% to 30% while improving consistency across long-lived government portal workflows.

Principles

Working principles

The rules that matter most once a codebase, workflow, or product team starts to grow.

Start with the system decisions that make delivery easier later.

Keep abstractions only when they reduce complexity and create leverage.

Treat performance and accessibility as part of the customer experience.

Automate the checks that protect launches, releases, and reputation.

Document decisions so teams can move faster after handoff.

Work with me