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Norbert smiling with his snowboard in the mountains

NorbertGrzenkowicz.

Software engineer.
Learning the app business with CalXd.

Take a look
Gdańsk, Poland

Things I build.

GitHub

CalXd

Track the food.
Get on with the lifting.

Calorie tracking for lifters.
Photo, voice, text or barcode.Explore the app

iOS Simulator Plugin

Give coding agents hands on an iOS simulator.

Boot devices, interact with apps, take screenshots. Open-source tooling for AI coding agents.

Naturalna polszczyzna

A writing skill for Polish that sounds Polish.

Natural writing, localization and editing. An open-source agent skill for idiomatic Polish.

Neural network in Go

MNIST. Built from scratch.

A handwritten-digit neural network and its training process, implemented in Go.

Away from
the keyboard.

Snowboarding, surfing, hard enduro.
Lifting, cycling, running.