Antonis Katsonis
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Portfolio · Engineering

Web Applications & Internal Tools.

Tooling for an enterprise order platform, a bilingual calculator site and a personal finance app. Each one built to take a piece of manual work off someone's desk.

Internal platform

Control Tower

The internal tool for a large order system. Stuck orders found by named patterns, explained in plain words for each kind of user, ticketed in one click, fixed by a run with four checks, and scored for how often it was right.

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Configuration map

Atlas

The dependency graph of an enterprise order platform's configuration: 69 components and 2,300+ entities, captured nightly, so a change shows what it touches before it is made.

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Side project

CyprusCalc

A bilingual site of 13 calculators for pay, tax, property and energy in Cyprus. Static export on a Cloudflare Worker, with 52 worked examples that must still come out before anything ships.

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Personal finance app

Velora

A personal expense tracker on Next.js and Supabase, built around the recurring rule rather than the row. Change a rule and one database call corrects every past expense it governs, and leaves the ones it does not govern alone.

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I learn by building. This is what came out of it.

If my work resonates with you, reach out. I'm open to collaborations, projects, or whatever comes next.

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