Ian Díaz
Sandi
Fullstack · AI · Tailored solutions
I build digital products that solve real problems. From polished interfaces to robust architectures, I am passionate about detail in every line.
The developer
behind the code
I am a developer based in Costa Rica, specialized in building modern scalable web applications. I am driven by constant curiosity and an obsession with creating experiences that truly matter.
I work comfortably across frontend and backend — I like having full product vision. I especially enjoy integrating artificial intelligence into real workflows.
Away from the keyboard, you will find me reading about systems design, exploring new tools or collaborating on open source projects.
Where I have
left my mark
I led the full redesign of the main platform, improving load time by 60%. I implemented AI pipelines to automate critical internal processes, cutting manual work by 40%.
I built and maintained the company design system, consumed by five product teams. I led the migration from React to SvelteKit, achieving significant performance gains.
First professional role. I developed e-commerce features, payment API integrations and Node.js automations. Direct mentorship from a senior team.
What I have
built
Project Name
Management platform with real-time dashboard, user roles, payment integration and advanced reporting. Scaled to 2,000+ active users.
Another Project
AI assistant for legal document analysis. Cuts initial review time by 70%. Built with RAG over its own vector base.
Open Source Project
UI component library for SvelteKit with dynamic theming support, AAA accessibility and minimal bundle size. 400+ GitHub stars.
Custom Store
Tailored e-commerce solution for a local brand. Admin panel, inventory management, payment gateway and automatic notifications.