Haziel User

At Couchsurfing, I build core product flows for a platform serving approximately 14 million users, including search, events, paywalls, account sync, and subscription access. I also implement the Node.js and NestJS microservices behind those experiences.

I improved Lighthouse Performance on critical pages from roughly 30–40 to 70+ through SEO, accessibility, and Core Web Vitals work, while driving reusable Tailwind Variants patterns across the design system. I created a K6 load-testing framework for weighted user journeys and tests of up to approximately 5,000 concurrent users.

Previously, I shipped payments, invoicing, ERP-style flows, and landing pages at Acueducto using TypeScript, Next.js, Node.js, and NestJS. At Mifiel, I built product and internal tooling for an electronic-signature platform in Ruby on Rails, including an environment-desynchronization detector that improved release confidence and dependency visibility.

At Loft, I grew from frontend developer into a tech lead, mentoring a five-person frontend team, supporting hiring, and aligning delivery with product and design. I prioritize understanding the problem and building solid foundations before implementing solutions.