Hyunsu

Developer

I have built services across many domains, and these days I make things with AI.

Construction, finance, e-commerce, travel, energy, fashion — I have built and run services in quite a few fields. Looking back, most of it came down to orders and payments. These days I run an e-commerce platform and make toy projects with AI on the side.

How I work

I get my hands in where needed
Server, screen or infrastructure — if that is where the problem is, I go there.
I like structures that last
I try to draw clear boundaries so the system bends less when requirements change.
I stay after launch
When something breaks I see it through, and I stick around until the service settles.

Experience

Field	Work	Role
Construction	Heavy equipment managementA system that shows where heavy equipment is in real time.	Dev
Finance	Payments & recurring billingPG and bank integrations, real-time payments and recurring billing.	Dev / Ops
E-commerce	Online ordering for a large supermarketBuilt and ran the online order and payment flow.	Dev / Ops
Marketing data	GA4 · GTM collection & auto-taggingA system that collects marketing data and tags it automatically.	Dev
Home shopping	Next-generation order & payment systemHelped rebuild the order and payment system.	Dev
Travel	Next-generation booking platform designDesigned the next structure of a booking platform with the team.	Design (team)
Energy	Solar monitoring & controlFrom field devices to data pipeline, control room and web/mobile dashboards — built and ran it all.	Dev / Ops
Fashion	E-commerce platformOrders and payments, fulfillment, products and merchandising — running and improving it now.	Ops / improvement
AI	LLM serviceBuilt a service on top of an external LLM.	Dev