Open to opportunities

martin castillo

@martincastillo1

Message

Senior software engineer focused on scalable React/Next.js systems and business-impact delivery.

Mexico

Message

What I'm looking for

I’m looking for a team where I can lead technical initiatives end to end—shipping React/Next.js and mobile products with scalable architecture, strong testing, and CI/CD—while partnering closely with product and backend to drive real business outcomes.

I’m a Senior Software Engineer with 10+ years building web and mobile applications, delivering from system design through deployment and production support. I specialize in scalable architecture, maintainable systems, and measurable business impact.

In recent work, I’ve led and shipped AI-driven and customer-facing products—building an AI-powered chatbot using the OpenAI API for 24/7 property tax self-service, and improving performance by cutting frontend load time from 11s to 1s with Next.js optimizations. I also drive platform migrations and growth, including moving a React platform to Next.js for 100,000+ monthly users and reaching top 5 search rankings.

Across projects, I take ownership of the full lifecycle: designing REST APIs, implementing testing with Jest and React Testing Library, and setting up DevOps with Docker and CI/CD on GitHub Actions. I’m collaborative and proactive—defining frontend architecture, API contracts, and data flow strategies, and mentoring teams to keep code quality high.

Experience

Work history, roles, and key accomplishments

Current

Senior Full-Stack Software engineer

Current

Bootstrap

Jul 2025 - Present (1 year 1 month)

Built an AI-powered property tax chatbot using the OpenAI API to enable 24/7 self-service and reduce reliance on human agents. Reduced frontend load time by 91% (11s → 1s) through Next.js optimizations and CI/CD improvements.

Health Software engineer

Team Julia App

Sep 2014 - Aug 2021 (6 years 11 months)

Built and integrated e-commerce platforms using WooCommerce and OpenCart, including payment gateway integrations (Stripe and PayPal). Refactored and maintained legacy projects to reduce technical debt and improve system stability.