<>Hi, I'm Hector Marquez</>

Senior Javascript Engineer
& Tech Architect

<> I help companies across the USA, Europe, and Latin America ship better software — faster. Whether you need to build a product from scratch, modernize a legacy system, or level up your engineering team, I bring 15+ years of hands-on experience and architectural thinking to make it happen. </>

Book a Free 30-min Call See What I Do

The track record behind the work

+15

Years of
Experience

+50

Project
Completed

+10

Countries
Worked

+18

Courses &
Certifications

• What I Do

Full-Stack Solutions to Build, Modernize, and Scale Your Product

Full-Stack
Development

I design and build complete web applications — from backend APIs to intuitive, scalable frontends. I work with technologies like React, Node.js, GraphQL, MongoDB, and Redis to bring reliable, modern software to life.

Modernization &
System Upgrades

Still using outdated tools? I help teams move from legacy systems to modern solutions. Whether it’s upgrading from Angular to React or restructuring a monolithic app into scalable services, I make the transition smooth and efficient.

Technical Architecture &
Team Guidance

I support growing teams by designing clear, maintainable software architecture and sharing practical guidance to help developers build with confidence and long-term vision.

• Client's Testimonials

Results that speak for themselves

Every engagement I take on is built around clarity, quality, and long-term thinking. Here's what the people I've worked with have to say.

“Héctor is a talented developer with a strong understanding of React. He’s also a quick learner and a great team player. I highly recommend him to any team needing his skill set.”

Franco Cerutti

Cloud Software Architect
Caylent

“Héctor’s command of design patterns and best practices is impressive. His code quality, peer code reviews, and commitment to continuous learning made a big impact on our project.”

Augusto Lezchik

Sr. Project Manager
Darwoft

“Héctor is very professional and skilled in .NET, CSS, XHTML, and JavaScript. He’s a great colleague and a solid web developer—I really appreciate his work.”

Víctor García

Software & Lead Developer
Simple [A]

Ready to move forward?

Whether you need a full-stack engineer to execute, a tech lead to guide your team, or an architect to design your roadmap — let’s find out if we’re the right fit. No commitment, just a conversation.

Book a Free 30-min Call Explore My Background