📍 Nykoping, Sweden | 💻 Fullstack developer | 🛍️ Founder of Sizable

I like building at the intersection of software and hardware. That is a big part of why I enjoy running Sizable: it lets me combine ecommerce, systems thinking, electronics, and practical problem-solving in one place.

🛒 sizable.se (closed source) - I built the custom ecommerce platform behind my own electronics store, serving customers across Sweden. It runs on Cloudflare's edge stack and powers daily operations, catalog management, and order flows in production. For me, it is the perfect mix of software, hardware, business, and hands-on building.

🌐 joakimjohansson.se - my corner of the internet.

• Building and running the custom ecommerce platform behind sizable.se
• Working with both software and hardware, from web systems and automation to electronics-related projects
• Building and shipping useful tools across TypeScript, JavaScript, Python, and C#
• Turning manual workflows into small products, automations, and internal tools
• Exploring web apps, Home Assistant, embedded projects, and agent-friendly tooling

• 🤝 Bluemine - Browser extension for Chrome and Firefox that enhances Redmine with UX improvements, command palette workflows, and team productivity features.
• 🗳️ pollwell - Open source poll platform built on Cloudflare Workers and Durable Objects.
• 🖼️ OverlayBatch - Batch tool for applying an overlay image to every image in a folder.
• 🖨️ product-label-print-server - REST service that generates and prints product labels for a Brother label printer.
• 💼 csv-to-sie - Browser-based converter from Shopify Payments CSV exports to Fortnox-compatible SIE files.
• 🧩 sizable-frontend-npm-package-builder - Utility for bundling shared npm modules into a legacy frontend setup.
• 🧑‍💼 next-portfolio - Next.js portfolio playground and personal site experiments.
• 🌍 eu-unemployment-rates - Small web app for exploring unemployment rates across EU countries.
• 🏠 google-photos-home-assistant-lovelace - Lovelace slideshow card for displaying Google Photos albums in Home Assistant.

• 🚗 Python-CAN-bus-to-Keypresses - Listens to CAN bus data over serial and turns it into keyboard input.
• 🕹️ multiClick - Arduino library for detecting single, double, and long button presses.
• 🎮 Game38 - 2D fighting game built with C++ and SFML.
• 🤖 EtimoBot - Python bot made for the Etimo competition.

Build useful things, learn in public, and keep moving. I like software that solves a concrete problem and still feels fun to make.