Marcos Iglesias — Staff Frontend Engineer
I build frontend products and the foundations that help teams deliver them. My work combines hands-on engineering, architecture, and design systems with technical strategy and mentoring.
At Puzzle, VEED, Lyft, and Eventbrite, I’ve helped teams modernize complex applications, ship new workflows, and improve product performance and consistency.
Selected work
Puzzle — Frontend architecture and product foundations
Explore the architecture and resultsCut the main application bundle and rolled out server-side rendering while evolving the architecture, components, and customer-facing features. I set frontend technical direction and stayed hands-on.VEED — From slides to an AI-powered video workflow
Explore the workflow and deliveryLed frontend delivery from requirements and proof of concept to MVP, aligning Product, Design, and three engineering teams around shared components and a consistent experience.Lyft — Accessible components used across the company
Explore the components and adoptionBuilt an accessible date picker used in more than 80 places across Lyft and contributed to a design system with 98% product adoption.Eventbrite — A product feature with measurable business impact
Explore the feature and business impactArchitected and scaled Follow Organizer, which drove 10 million follows and 1.5 million ticket sales, contributing over 1% of company revenue.
How I work
Technical direction that reaches production
I turn product and engineering needs into architecture decisions, written proposals, and staged delivery plans, then help implement them. At Puzzle, I aligned teams through RFCs and a frontend ownership model.
Shared foundations grounded in product needs
I build accessible components, improve application performance, and introduce quality checks that support consistent delivery.
AI in practice
At Puzzle, I introduced AI-assisted engineering workflows for maintenance and documentation. At VEED, I helped lead an AI-powered product workflow from proof of concept to MVP.
Stronger engineers and clearer collaboration
I mentor engineers, review code, and work across Product, Design, and Engineering to align teams around decisions and outcomes. At VEED, I mentored six engineers, helping four earn promotions.
Open source and writing
Author of Pro D3.js, creator of Britecharts, and contributor to Amundsen. I share what I learn through writing, open source, and conference talks.
Let’s talk
Looking for a Staff Frontend Engineer who can contribute to product delivery, frontend architecture, and the growth of your team? Let’s talk.
Get in touch