Independent software engineeringBased in the UK. Working everywhere.

Good ideas.
Solid software.

AI got you started.
Let’s get you ready for the real world.

Code reviews, thoughtful builds and a steady hand when things get complicated. Direct access to a senior engineer, from first conversation to final release.

Let’s talk about your project
The space between idea & releaseFIG. 01 / A LITTLE ORDER GOES A LONG WAY
Make it
hold together.

A promising prototype. A dependable product.
We help with the bit in between.

02 / The person behind the work

18+YEARS IN SOFTWARE

You talk to the person
who does the work.

I’m Antony Doyle, the engineer behind Siege21. I help people turn promising software into something they can rely on.

I’ve spent more than 18 years building web products, backend services and APIs. I’ll tell you what needs fixing, what can wait, and when the simplest option is the right one.

A little more about me

03 / Working together

Less ceremony.
More getting somewhere.

01

Talk it through.

Show me what you have, where you want to get to, and what’s getting in the way.

02

Look under the hood.

Follow the code and the data. Find the actual problem before prescribing a fix.

03

Make a plan.

Agree on what matters, what it takes, and what a good result looks like.

04

Do the work.

A clear handover, hands-on fixes, or support through release. Whatever gets you there.

A rough idea is plenty to start with.

What are
you building?

Let’s work out the next step.contact@siege21.com