Dominik Sieroń

• Work across a Good Lood ecosystem of roughly eight systems, from a React Native app with 500,000+ registered users to point of sale handling millions of transactions a year.
• Move between mobile, backend, and internal tooling rather than owning one service, on a team small enough that nobody specializes.
• Joined as a summer intern and moved into a full engineering role.

Java · Spring · MongoDB · TypeScript · React · React Native · Electron · Ruby on Rails · Django · PostgreSQL

• Designed and built a backend service in Go and gRPC, including a MongoDB migration.
• Set up CI/CD pipelines with GitHub Actions.
• Migrated a front end onto the company design system and fixed UX defects in TypeScript, React, and SCSS.

Go · MongoDB · TypeScript · React · Sass

• Maintain the Gatsby and React site for the AGH body coordinating student scientific associations, with Contentful behind it.
• Modernizing it for long-term maintainability so it survives handover after I graduate.
• Edit content and work directly with scientific circles.

Gatsby · React · JavaScript · Sass · Bootstrap

• Build and maintain the association's Next.js and React site alongside the rest of the web team.

Next.js · React · TypeScript · Sass

• Built the association's site in Astro with React islands, focused on staying maintainable as members rotate through.

Astro · React · TypeScript · Tailwind CSS

cinelog · instead of Trakt

Tracks films and series I have watched, with a watchlist, a watch queue, ratings, and stats and recaps over time.

TypeScript · Turborepo · Next.js · React Native · Expo · tRPC · Hono · Drizzle · PostgreSQL · Tailwind CSS

fridgelist

Keeps a stocktake of what is actually in my fridge. Receipts from Biedronka import as JSON, things I buy often get saved as regulars, and I tick items off as I finish them. Once stock runs low it builds the shopping list on its own.

TypeScript · React Native · Expo · Zustand

macrolog · instead of Fitatu

Tracks calories, protein, fat, and carbs per day. Products are added by scanning an EAN barcode with the camera against an open products database. When something is not in there, I create the product or the dish by hand and enter its macros.

TypeScript · React Native · Expo · Zustand

• Engineer's degree (inż.) completed. Master's degree in progress.