20+
years building software
12
years in CTO roles
4
ventures built and scaled, one exit
70+
engineers personally hired
A founder before a fractional CTO
I launched my first venture at 15, coding CMS systems for local communities. Some wins, some losses, but enough scars to call myself a lifelong entrepreneur.
Since then, I’ve validated 20+ prototypes in the market, built and scaled four ventures as founder and CTO, and completed one exit.
I co-founded GetYourLawyer in 2017: a Swiss legal marketplace, virtual legal department for SMEs and software for law firms. I formed and led engineering and owned the technology through growth, acquisition in 2019 and a management buyout in 2023, including technical due diligence. My final exit was January 2025.
At AureaTauri, I personally built the machine-learning investment engine and its complete technical operation. The venture was eventually discontinued following changes in regulation and market accessibility.
I know what it means to make decisions with your own business at stake. I bring that judgement into yours.
Engineering02
Engineering depth, leadership responsibility
I’ve designed and operated quantitative-trading systems, led Staffcloud’s live-platform rewrite and architected an appointment-booking platform used by BMW dealers. Recent work includes leading research, architecture and delivery of a production-ready AI workspace, connecting hundreds of external sources and supporting complex business questions across hundreds of gigabytes of company data.
I have personally hired more than 70 engineers and managed seven-figure technology budgets. Understanding the code and the organisation changes the decisions I make about feasibility, people, cost and delivery.
Leadership03
Clear, direct and open to a good argument
My style is honest, direct and persistent. If a plan is unrealistic, an investment is difficult to justify or the evidence points towards stopping, that belongs in the conversation.
Good arguments are welcome. People should understand what we decided, why it matters and what they own.
“He is a highly adaptable, encouraging, supportive, and friendly leader.”
Often my role is less about adding more, and more about removing what doesn’t serve the business. Technology is a tool to build sustainable ventures.
Fractional04
Why I work fractionally
I enjoy working with founders at different stages and applying lessons from my own ventures. It keeps me curious and gives the business experienced technical leadership at the stage it needs it.
I have also mentored through MassChallenge and Startupbootcamp and contributed open-source software.
Switzerland05
Switzerland is home; the work is international
I work fluently in English, German and Swiss German, and have led multicultural teams across the Americas, Africa, Europe and Asia. Work is mainly remote, with on-site involvement when it adds value.
How we work together.Experience06
Experience
Founder judgement, executive leadership and engineering in one career.
Fractional CTO, Matthias Isler
2022–present
Co-Founder and CTO, GetYourLawyer
2017–2024 · exit 2025
Founder and CTO, AureaTauri
2021–2024
CTO, Staffcloud
2014–2018
Lead Developer, Rad-Termin.ch
2012–2014
Software Engineer
2005–2012
Contact07
Tell me what you’re building
Tell me which decision or blockage you’re facing, what is at stake and when it needs attention. I’ll give you my view. Then we decide whether to work together.
The first conversation is free and takes 30 minutes. You leave with my view on whether I can help and how.