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Neil ArmstrongSoftware architect and developer
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Belfast · Northern Ireland

I’m Neil Armstrong, a software architect in Belfast. I lead teams that build new products and modernise critical systems.

Full stack for over a decade, from React and 3D in the browser to AWS serverless, Java, Kotlin, and native Android. I’ve led teams of up to ten as tech lead and engineering lead.

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Neil Armstrong, a software architect and developer in Belfast

What I bring

Build it new
A one-week Android prototype won the work and became a production app.
Change it safely
More than 50 Lambdas rebuilt in four weeks and a business critical loan processing webapp fully rebuilt in four months, with no regressions.
Leadership and ownership
Took over two struggling teams on a full rewrite / modernisation engagement, and shipped both on tight deadlines.

Professional work

Products and systems I’ve delivered

Anonymised case studies, from bespoke new products from scratch to critical system migrations.

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Opinions

How I like to build software

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  • A rough create, review, and confirm flow is tried with the team. Feedback removes an unnecessary options branch, and the same flow is refined into the feature.

    5 November 2026

    Fuzzy frontend

    Build just the UI of a feature, end to end and roughly, and put it in front of people before the rest of the work begins. How I used it before AI, and what AI changed.

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Open source

Projects built in the open

Software I build in the open, and how I approach architecture.

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Away from the desk

Pedals instead of pull requests

When I’m not at a keyboard, I’m usually on a bike. My favourite trip so far is Tokyo to Seoul, with the photos, the numbers, and everything that went wrong.

2,304 km · 20 riding days

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A loaded touring bike leaning against a wooden fence, overlooking misty layered hills

Open to conversations

Building something new, or changing something difficult?

Product engineering, software architecture, leading delivery teams, and modernisation.

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