Hey, I'm Aaron Chacón.
Senior Frontend Engineer

I'm a Senior Frontend Engineer with 6+ years crafting scalable, accessible interfaces — focused on Angular, design systems, and real-world performance.

Available for B2B projects

View CV

About

Hi! I'm Aaron — a Senior Frontend Engineer with 6+ years building scalable, accessible web applications. I specialize in Angular and design systems: modular, feature-based architectures and reusable component libraries with consistent APIs and design tokens. I care deeply about performance, accessibility, and the craft behind a clean, maintainable codebase.

I've worked across high-growth startups and enterprise products — from financial-compliance platforms to SaaS — turning complex requirements into intuitive, pixel-perfect interfaces. I love collaborating closely with design and product, and I'm always sharpening my skills with the latest in the Angular ecosystem.

Work experience

2021 — 2026
Frontend Engineer Ontop
2021 — 2021
Frontend Engineer Freelance
2020 — 2021
Frontend Developer GrowthMaster
2019 — 2020
UI Developer Preventor

Featured projects

A look at recent work — where clean architecture meets real-world performance.

✳ OurMemory · family legacy vault
View project ↗
A secure family-legacy vault where parents preserve their children's memories in photo, letter and voice.
✳ Snappy · healthcare scheduling
View project ↗
A scheduling platform for healthcare businesses — integrated calendar, staff tracking and a customizable booking site.
✳ Jurisly · legal tech
View project ↗
A B2B platform that digitizes law firms — passwordless client portals, mobile document scanning and e-signatures.

How I can help

End-to-end frontend work — from architecture to pixel-perfect, high-performance interfaces.

Frontend Engineering

Scalable, accessible web apps with modern Angular — signals, SSR/SSG and clean, maintainable, feature-based architecture.

Design Systems

Reusable component libraries with consistent APIs and design tokens for cohesive, on-brand UIs across products.

Web Performance

Audits and optimizations for Core Web Vitals — fast, smooth experiences that score top marks on Lighthouse.

Consulting & Mentoring

Architecture reviews, best practices and mentoring to level up your team, codebase and delivery.

Testimonials

What colleagues and clients say about working with me.

“Working with Aaron has been fantastic. He has a sharp eye for detail, which directly impacts the quality of our frontend delivery. He doesn't just build components; he cares about the user experience and pixel-perfect execution. What I appreciate most is his growth mindset — he's constantly upskilling and adapting to new tech, which pushes the whole team to level up.”
Tatiana NavaHead of Product Design · Ontop
“Aaron is a skilled Angular developer with a strong expertise in CSS, consistently delivering clean, responsive, and visually appealing designs. He is always ready to assist and collaborates with the team, making valuable contributions to every project.”
Moises LeonorSr Frontend Engineer · Ontop
“Aaron is a dedicated, responsible and detail-oriented professional. He doesn't hesitate at giving feedback and proposing new ideas, improving any project he is involved in. He is also a great teammate, and the communication with him has always been a strong part of why he is great at his role. Totally recommended!”
Santiago Duque BernalBackend Developer · Global66
“It's been a pleasure to collaborate with Aaron and see his professional growth. His sense of responsibility and attention to detail make him unique. Focused on delivery quality, best practices, and a true team player. He has my respect and admiration as a developer and person.”
Claudia Lezama SandovalTechnical Delivery Manager · Unosquare
“Aaron is an amazing developer who is known for always doing excellent work that brings value and quality to the product. He has a great sense of ownership and responsibility in what he does, and it shows in the new features that he develops.”
Héctor Iván Palacio RivasBackend Developer
“I had the pleasure of working closely with Aaron during our time at Ontop. His exceptional efficiency and dedication to delivering high-quality work were truly impressive. Not only is Aaron a skilled front-end developer, but he also brings a positive and collaborative energy. I highly recommend him for any project or team looking for a talented and reliable professional.”
Micaela FloreanoAI Product Owner
“Aaron is an excellent professional, experienced in web layout and JavaScript. In the project we worked on together he contributed effectively, with excellent results.”
Adib CheccoriUX/UI Designer · Preventor