Kelsus Watch Co.

The Team Behind the Timepieces

Fifteen years of building software systems. Now we build mechanical ones.

In 2008, the global financial crisis hit and Jon Christensen's freelance development contract ended. Instead of waiting out the storm, he picked up new skills, found new opportunities, and followed an instinct that led him to Resistencia, a city in northeastern Argentina most people have never heard of.

There he met Fede, Raúl, and Jony—three developers who became the foundation of the company. The four of them started Kelsus out of a small office, taking on software projects that nobody else wanted to touch. They were scrappy, resourceful, and obsessive about getting the details right.

Over the next fifteen years, that small team grew into a software development firm with a reputation for precision engineering. Kelsus built custom systems, automation platforms, and enterprise integrations for clients across industries. The work demanded rigor, patience, and an eye for how complex systems fit together.

That same team now builds mechanical timepieces. The obsession with how things work, the attention to every component, the insistence on getting it right—all of it carries over. We just traded compilers for chronographs.

Jon Christensen

Jon Christensen

Founder

Federico Tuckey

Federico Tuckey

Raúl Herrmann

Raúl Herrmann

Jonathan Díaz

Jonathan Díaz

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