Backhand / Frederik Hannibal

Frederik Hannibal — Copenhagen

I build things,
and back the people
who build them.

CTO, software architect and angel investor. Cofounder of Actimo (acquired by Kahoot!). Now building mailon.ai and investing in early technical founders through Backhand.

Connect on LinkedIn → What I'm building
20+ yrs building / Actimo → Kahoot! exit / Angel + technical advisor
i.

Now

The companies I'm building and running today.

01
mailon.ai Live · 2026
An AI email agent that reads and replies to your inbox — grounded in your own docs, with you in control.
Co-Founder
02
Backhand Since 2009
My vehicle for investing, technical advisory and founding the occasional startup. Where new ideas get built and early founders get backed.
Founder
Investing & advisory
ii.

Investments & advisory

Angel cheques and hands-on technical advisory for early-stage teams.

Viio

2020 → now

Angel investment and software architecture advisory — shaping the platform from the technical foundations up.

Angel · Advisorviio.io ↗

Vitus Cloud

2019 → 2023

Interim CTO — leading engineering and platform architecture through a formative growth stage.

Interim CTOvitus.cloud ↗
iii.

Track record

Two decades of founding, building and leading engineering.

mailon
2026 – now
Co-Founder — building mailon.ai
Viio
2020 – now
Angel investor & software architecture advisor
Backhand
2009 – now
Founder — software architecture, advisory & investments
Vitus Cloud
2019 – 2023
Interim CTO — cloud platform & engineering leadership
Actimo
2013 – 2019
Cofounder & CTO Acquired by Kahoot!

Twenty-plus years in and around engineering — cofounding and scaling Actimo to an exit, interim CTO work, and writing the first lines of someone else's product. I care about clean architecture, products that actually ship, and founders who build.

Based inCopenhagen, Denmark FocusArchitecture · CTO · angel StudiedCS, Univ. of Copenhagen

Contact

Let's talk.

Building something, or want a technical sounding board? The fastest way to reach me is LinkedIn.

Connect on LinkedIn →