Mateo.

Zagreb, HR

SOFTWARE ENGINEER

React · Next.js · TypeScript · Across the stack

Frontend engineer with five years in React, Next.js and TypeScript. I've led the frontend on products used daily by tens of thousands of users — owning features from planning through to release — mentored developers, and shipped my own product, kreni.app, a live Zagreb transit tracker with 5–20k monthly active users.

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[01] Recent Writing

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TypeScript - Discriminated Unions

Leveraging TypeScript's discriminated unions for type-safe code

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PubWeave - Collaborative Preprint Text Editor

PubWeave, phase 1: A blog editor and preprint collaboration platform.

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[02] Selected Work

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Kreni — live Zagreb transit map

Built solo. Found by 4,400+ people in the first month — live trams, buses, trains and city layers over static files and a Cloudflare Worker.

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[03] Contact

Ready to collaborate

I take features across the whole stack — from the API to the UI — and own getting them released. Whether you need someone to lead a frontend, ship a product end to end, or bring an idea over the line — let's talk.

[email protected] →