Founded November 2025
Registered in England and Wales
About Tesserium

Tesserium Partners is led by Daryn Shaxted, who has worked in technology for more than 25 years and in digital health since 2014. His first 15 years were in consumer technology and retail.
For the last 6 years Daryn has led product and engineering on care management platforms for US value-based care organisations, used by ACOs, community health centers, rural health clinics and specialty practices. We focus on care for underserved communities, where care teams are stretched and the software has little room for error.
Before that, Daryn led health, insurance and platform work in the UK and internationally, including a nurse-led health service for UK employers.
Tesserium is Daryn's practice. When work needs more hands, we bring in specialists we have worked with before, and you meet them before they start.
What you can expect from us
We work alongside your team, to a written scope.
We join the planning and reviews we agree with you, and we report on what ships.
We write things down.
Decisions, trade-offs and risks go into documents your team keeps after we leave.
We fix root causes.
When something breaks, we find the cause before we change anything, and we add a regression test wherever the code can be tested.
We tell you when something is wrong.
If a plan, a supplier or our own work is off track, you hear it from us, with what we propose to do about it.
Memberships and recognition
Daryn's memberships and roles
- MCMI
- Member, Chartered Management Institute
- MBCS
- Member, BCS, The Chartered Institute for IT
- Judge
- Digital Health & AI Awards 2025 and 2026, Digital Health Hub Foundation
Recognition
Awards for platforms Daryn led before founding Tesserium.
- 2016
- Named in the Digital Health Global 100, The Journal of mHealth
- 2016
- Digital Health Award, Health Information Resource Center
- 2014
- Health and Wellbeing Award, Royal Society for Public Health