Hi, I'm Juan Carlos Largo (@imlargo). Senior software engineer and technical lead, based in Medellín, Colombia.

I'm full-stack with architectural depth on both sides. I work primarily with Go, TypeScript and Svelte, and I've spent the past 3+ years building and leading production systems across Go distributed backends, TypeScript/Vue/Svelte frontends, and AWS cloud infrastructure.

I currently lead frontend engineering at Unergy, a solar energy company, where I own all frontend architecture decisions, lead a team of 4+ engineers, and am directing a progressive migration from Vue to Svelte across the company's platforms. Before that, I was the sole technical owner at Butter, an international content-generation SaaS I co-founded and took from zero to 1,000+ active users, owning architecture, infrastructure, and production operations end-to-end.

I also run Kora Systems, an engineering consultancy where I've delivered 5 production systems across 4 industries, all shipped to full production with zero ongoing supervision required. I'm equally comfortable as the sole engineer on a greenfield system or as the technical lead coordinating a team, defining standards, and raising the quality bar.

On the side, I build tools and open-source projects. Pegaso, a course scheduling platform for Universidad Nacional de Colombia, reached 6,200+ active users through entirely organic adoption and prompted formal acquisition discussions with the institution. I also contribute to open-source projects including shadcn/ui (Svelte + Vue ports), Svelte ecosystem libraries, and Gin, and published a webpush library for the Gleam ecosystem.

If you're interested in collaborating, talking about technology, or building something together, I'm always open to new connections.