Dominik
Sieroń

I work on the software an ice cream chain runs on. The Good Lood team is a small one, and we cover roughly eight systems between us.

The customer-facing ones are a loyalty and q-commerce app with over 500,000 registered users, the backend behind it that also serves point-of-sale and the Joy Station topping dispenser, and a point-of-sale system handling millions of transactions a year. The rest are internal: recipe management that feeds nutrition and allergen data to ERP, tray tracking that follows containers from production back to return, delivery with driver tracking, and the in-store screens showing live prices and what flavors are left.

A team that size across that many systems means nobody specializes. I work from mobile through backend to internal tooling, and most of it ends up touching something physical: a freezer, a delivery van, a tray coming back from a store.

I joined as an intern over the summer and moved into a full engineering role.

Helped design and build a backend service in Go and gRPC, including a MongoDB migration and CI/CD pipelines through GitHub Actions. Also worked on the front end, migrating a service onto the company design system and fixing UX bugs in TypeScript, React, and SCSS.

I maintain the site for the university body that coordinates AGH's student scientific associations. It is built in Gatsby and React, with Contentful behind it.

Most of my recent work there has been modernizing it for the long term: making it maintainable by whoever comes next, and making sure it keeps working after I graduate and hand it over. I also edit content and work directly with the scientific circles in my domain.

Web developer on the site for AGH Code Industry, a student scientific association. I build and maintain it in Next.js and React, working with the rest of the web team on whatever the organization needs.

A site for a student association, built in Astro with React islands. The focus was a codebase that stays maintainable as people rotate through the organization. That matters more here than it sounds, because association sites tend to decay the moment their original author leaves.