Hello.
I'm Cato, a software engineer based in Berlin.
I'm currently open for freelance projects! Let's build something great together.
Recent Projects:
Loyalties - Customer loyalty mobile app
Zero Circle - 0% product & place web platform
My tech stack:
React, React Native, TypeScript, Ruby on Rails, and more.
Loyalties is a mobile app that helps small businesses attract and retain customers through customizable digital reward systems. It replaces outdated paper cards with a sleek, easy-to-use solution and makes it simple for customers to keep all their loyalty rewards in one app. I led the engineering, building the platform end-to-end with React Native for the mobile app, a Ruby on Rails API backend, and PostgreSQL on Fly.io, while collaborating with a designer on the user experience.
Zero Circle is a web platform that helps people discover and explore zero-percent products and places. From alcohol-free drinks to cafés and shops offering alternatives. It combines a clean marketplace experience with multi-language support, ratings, and favorites, making it easy for users to find and enjoy new options. I led the engineering, building the platform end-to-end with Next.js, Prisma, and PostgreSQL, hosted on Vercel, while collaborating with the team that developed the concept and design.