From the factory floor to the system under it.
The short version
I am Sjaack Tieman, Dutch, born in 1984. I started in the navy as an ICT and communications specialist. After that I was a production manager for about nine years: eight managers, five departments and between 80 and 120 people, from planning to delivery.
In 2023 I sold my house, quit my job and travelled through Asia. After that I came to Lima and stayed. Since 2024 I have built automation for a food distribution company here: first chatbots and workflows, then the apps around them, and in 2026 the ERP that replaced those apps.
DO2 Ops is the name I work under. DO2 comes from digital_oxygen, a name I have used since I was twelve. Ops is short for operations, because that is what I know and what I build for.
How I work
- I test through the screen the user sees. A passing test on my laptop is not the same as a driver finishing a route on a phone. I do the whole route myself before I say it works.
- I say what I did not test. Every report I write has that line. It is usually the most useful one.
- I pick boring technology. One server, one database, a backup every night. The interesting part should be what the software does for the people who use it.
- I work with AI every day and I do not trust it with arithmetic. Models write, read and sort. Rules in code decide.
The practical part
Open to remote roles and to projects. I have a residence permit with the right to work in Peru and my own tax number, so I can invoice companies anywhere or join a team as a contractor.
- Based in
- Lima, Peru (UTC-5)
- Languages
- Dutch, English, Spanish
- Code
- github.com/DigitalOxygen1984
- Sjaack Tieman
- CV
- Download as PDF
- hello@do2ops.com
Tell me what goes wrong on a normal Tuesday.
Thirty minutes, video or phone. You describe one process that costs you time. I ask questions and tell you honestly whether I would automate it, fix it first, or leave it alone. No slides.
Lima time, UTC-5. I reply within one working day, in English, Dutch or Spanish.
Open to remote roles and to projects.