Writing

Panagiotis Athanasakopoulos

Παναγιώτης Αθανασακόπουλος — on software architecture, web development and the systems behind a product.

Architecture14 September 2026

A checkout is a distributed system, whether you designed one or not

Money moves in one system, the room or the stock lives in another, and your database is the third. Treat the three as one transaction and they will eventually disagree — usually after the customer has paid.

3 min

Engineering14 September 2026

The deploy that quietly undoes last month's fix

Most regressions are not new bugs. They are old fixes, overwritten by a perfectly green build made from the wrong place. The cure is a deploy that knows what it must never ship.

3 min

Engineering14 September 2026

The default is the decision

A field nobody sees still has a value. Whatever you write as the default becomes the answer for everyone who did not choose — which, in practice, is almost everyone.

2 min

Architecture14 September 2026

Why I build on boring technology

React, Node.js and PostgreSQL are not exciting choices. That is the recommendation. The interesting part of a product should be the product, not the stack underneath it.

2 min

Engineering14 September 2026

The worst bugs return 200

A crash gets fixed by lunchtime. The failure that reports success — an empty page served with a 200, a job that logs 'completed' while doing nothing — can run for months.

2 min

The author

Panagiotis Athanasakopoulos

Παναγιώτης Αθανασακόπουλος

Computer Engineer | Founder of TWENTYONE WEST COAST TRVL STORIES PC & Co-Founder & CEO of TRVL

Full profile

Initiate the blueprint

Talk to him directly.

There is no account manager at TWENTYONE. Tell us what you are building and the first conversation is with the person who will decide how it gets built.

Start the briefing See the benchmarks