/tech
I'm Monica Saiz, a frontend engineer focused on thoughtful UI, clean architecture, and digital experiences that feel clear for both users and developers.
I need things to make sense,
so I build until they do.
Philosophy
I don't like magic code. I like understanding what I build, why it works, and how it can evolve without becoming fragile.
To me, a good interface is not only beautiful or functional. It is also intentional, maintainable, and respectful of the person who will read the code next.
I care about clarity, structure, accessibility, and calm engineering. I'm less interested in trends for their own sake, and more interested in building systems that make sense.
Selected work
A few projects that reflect how I think, build, and refine.
How I took ownership of a critical performance issue in seQura's embedded payment widgets across merchant websites — investigating the problem, redesigning the architecture, and implementing the solution end-to-end, reducing main-thread blocking time by 83%, transfer size by 48%, and total bundle size by 79%.
A neurodivergent-friendly Pomodoro app focused on calm timing, history clarity, and thoughtful interaction design.
A poetic digital experience that tells users whether the Moon will be visible tonight from their location.
A personal developer experience that blends storytelling, structure, and interface design into a more human portfolio.
Expertise
Principles
Clarity over cleverness.
Every component should have a reason to exist.
Good UI feels simple because the thinking behind it is not.
Maintainability is part of the user experience too.