About

Builder first.

I like building things. Companies, teams, systems and strength.

I'm a naturally curious problem-solver and builder. I like enabling capability using technology, based on a problem, a strategy or a vision. I deliver by finding the quickest way to impact whilst building to the definition of done. And I like being both an individual contributor and a leader of people.

Being a single point of failure is bad architecture, and it's worse in a person, so I share what I know. I've developed the person who took my job, and taught customers to do the work we were being paid for. Being needed less is how I measure success.

By default I build the simplest thing that works, but I don't shy away from complexity when it's unavoidable; complex problems sometimes require complex solutions. My skill is telling those two apart.

I've been fortunate to have worked at every level, from helpdesk to CEO, as a supplier of services, externally and internally. That's why I understand what it costs to build, what it costs to run, what it does to the P&L, and what it does for the people who use it, and why I can hold all four at once. The organisation is the customer, and they always come first.

John Kattenhorn portrait
SHROPSHIRE, ENGLAND · @johnjkattenhorn
CAREER

The route so far.

HOVER OR TAP A WAYPOINT
1985 1988 1993 1996 2004 2008 2010 2012 2014 2017 2021 2022 2025
1985 · ORIC ATMOS
The first computer. Dad took months of flak from Mum for buying it; worth every bit.
8 BITS · THE APPROACH PATH
1988 · THE OPEN UNIVERSITY
Two weeks of school work experience loading punch cards for transfer to tape. Loved every minute.
AGE 16 · WHERE THE ROUTE STARTS
~1993 · PARAGON VINTNERS · IT SUPPORT
IT support plus the wine management system in Progress 4GL.
THE FIRST SOFTWARE ROLE
1996 · PHOENIX · DEVELOPER
The firm's only IT person, and its youngest employee, developing the MXP system in Progress.
30 PEOPLE · ONE IN IT
2004 · PHOENIX IT GROUP · LSE FLOAT
Eleven years from sole IT person to Director of Development of a listed group.
£127M REVENUE BY 2007
2008 – 2010 · COGNISCO · CTO
Assessment analytics warehoused in SQL Server, self-serve in SharePoint. Microsoft wrote the case study.
10,000 APPRAISALS: 22 HOURS → 6 MINUTES
2010 – 11 · CAPITA SIMS · DEV MANAGER
Every software discipline across the UK and India, on the country's dominant schools product.
70 PEOPLE · FIRST SPLIT-SHORE TEAM
2012 · APPLICITA · FOUNDED
Incorporated after a year freelancing; fully remote from day one, staffed through Upwork.
INCORPORATED 18 MAY 2012
2014 · TAP · DFID NIGERIA
Offline-first e-voucher platform for farm subsidies: Orleans, peer-to-peer sync, NFC in the field.
500,000+ FARMERS IN FOUR MONTHS
2017 – 2018 · M-KOPA · INTERIM CTO
Rebuilt the platform and the team; proved the pay-as-you-go phone with a £20K proof of concept.
£20K POC → 6.4M PHONES SOLD
2020 – 25 · 4R DIGITAL · CO-FOUNDED
Climate tech in emerging markets: pay-as-you-go finance for solar irrigation and electric motorbikes. Technical Director for the first two years, then technical adviser when it needed more bandwidth than I had.
DIRECTOR 2020 – 2025
2021 – 22 · LTG · CHIEF ARCHITECT
Live Tech Games: real-time play at World Cup scale on Orleans and SignalR. Microsoft filmed it, twice.
500,000 CONCURRENT PLAYERS
2022 – 25 · APPLICITA · CEO
Took the top seat to build the pipeline that word of mouth had always covered.
WOUND UP IN 2025
2025 – 26 · KWALEE · CIO → CTO
Technology at the centre of how the company understood, built and shipped.
CIO, THEN CTO · TO SEPTEMBER 2026
2026 · NOW
Building the articles, the site they live on, and the homelab that runs it.
THE NEXT CLIMB
FIG 01 Career elevation, 1985 to now. Real waypoints; the dips are real too.

Away from the desk I lift and I ride, and I'm stronger now than I was at thirty-two. I enjoy working on my homelab, where I learn, experiment and stay current.

I plan, execute, review, learn, and I go again.

ABOUT THIS WRITING

Everything here is written in a personal capacity, not on behalf of any employer. Nothing names a colleague, past or present. Examples are drawn from across a career and anonymised or composited where needed.