Kasper Simonsen — Independent Software Engineer, Melbourne
12 years getting things to work. I build custom software for businesses when the off-the-shelf tools don't fit. Web, iPhone, Android. Apps that run factory floors, Shopify backends that handle the awkward bits, AI agents that write industrial control code. Based in Melbourne. Taking on selective contract work — get in touch.
Systems in prod
02Multi-agent pipeline → Siemens SCL. Auto-learns from compile errors.
Shopify-native manufacturing ops — BOMs, inventory, purchasing, capacity. Tenant-scoped, append-only ledger.
Primary stack
Primary stack
Code that stays in spec.
Eight AI agents for Siemens TIA Portal projects — turning functional specs into compiling SCL and HMI, and turning legacy projects back into editable specs. Pattern library grows with every correction.
Manufacturing operations, under the storefront.
Manufacturing-operations software for Shopify-native product brands. Inventory, multi-level BOMs, production orders, purchasing, stocktake, reports, and capacity planning in one connected system — replacing the spreadsheets and bolted-together MRP those brands typically end up running.