Senior Frontend Engineer / 2026

I build front ends that stay fast after they ship.

I'm Miguel, a senior frontend engineer in Colombia with 17+ years of experience. A performance habit older than any framework I use, and open-source code — one widget alone serves 11M+ requests a month.

Read the writing

02Skills

The stack I ship with, and what I did with it.

  • Framework

    Next.js

    App Router, Server Components and Server Actions. Nine production platforms since 2023, shipped and maintained rather than prototyped.

  • Library

    React

    Reusable component systems built from Figma handoffs, which is my weekly work. In production since November 2023.

  • Language

    TypeScript

    The default for the platforms I ship and for the packages I publish on npm.

  • Styling

    Tailwind CSS

    With Radix UI and shadcn/ui as the base of the platforms: accessible primitives, styled in one place.

  • Headless CMS

    WordPress and WPGraphQL

    WPGraphQL and REST feeding Next.js, with on-demand revalidation from WordPress when content changes.

  • Plugins

    PHP

    Eleven production WordPress plugins with PSR-4, PHPStan level 8, PHPCS and PHPUnit, released by CI.

  • Runtime

    Node.js

    The CLIs and libraries I publish on npm, such as jsdoc-to-tsdoc, recaptcha-next and docs-sitekit.

  • Infrastructure

    AWS

    CloudFront, ECS, Secrets Manager, CodePipeline and Amplify behind the production platforms.

  • Quality

    Testing and CI

    Jest, Testing Library, Cypress and Playwright, with CodeQL, Dependabot and SHA-pinned actions across 18+ repositories.

03About

I taught myself to code with no formal training, then got my first professional job in 2009 and studied Multimedia Production at SENA while working.

Since 2023 I've been back in school for a Software Engineering degree, alongside my day job as a senior frontend engineer at SilverAssist, working mostly with Next.js, TypeScript and headless WordPress.

I'm based in Madrid, Cundinamarca, Colombia. Outside of work, I'm usually out with my dog, Mila.

Me with my dog, Mila

  • 17+

    Years of experience

  • 9

    Production Next.js platforms

  • 11

    Production WordPress plugins

  • 11M+

    Monthly requests, one open-source widget

  1. Frontend developer

    2009 to 2019

    First professional job in 2009, then agencies and independent client work through 2019.

  2. Frontend tech lead, SAP Commerce

    2019 to 2024

    Storefront work where the performance habit started: ES6 modules, PWAs, service workers and lazy loading. Promoted to tech lead in 2020.

  3. React and Next.js in production

    Since November 2023

    Moved to React and Next.js, building platforms for a U.S. client in senior care and senior living.

  4. Senior frontend engineer

    Today

    Nine production Next.js platforms, eleven WordPress plugins and my own open-source packages, built from Figma handoffs.

04What I do

The interesting part is never the first release. It's whether it still holds up a year later.

  • 01

    Performance that survives the release

    96 desktop Lighthouse, 0.8 s LCP, 0 CLS on a production platform — and six years of the same work before the current stack, back to service workers and PWAs on storefronts.

  • 02

    Next.js platforms, nine of them

    App Router, Server Components and Server Actions against headless WordPress and REST, shipped and maintained rather than prototyped.

  • 03

    Pipelines that catch things early

    Matrix testing, CodeQL, Dependabot with auto-merge and SHA-pinned actions across 18+ repositories, plus CI that provisions and requests automated review.

05Work

Things that are live, and what is inside them.

All work

06Writing

What each project actually taught me.

Not tutorials. The bug that took a week to find, the fix that turned out to be configuration, the assumption that measurement destroyed.

07Contact

Have something to build, or just say hi.

Elsewhere

me@miguelcolmenares.com

Madrid, Cundinamarca, Colombia