The Verdict: Not eligible
You are over the age limit for your country's agreement, and there is no waiver, so this visa is closed to you. Look at the employee card or the digital nomad programme instead.
The limits are set by treaty: 35 for Canada and New Zealand, 30 for Chile, Peru, Israel, Japan and the Republic of Korea, and 26 for Australia.
The employee card covers work at any skill level with a job offer and runs up to two years at a time. If you work remotely in IT or marketing, the digital nomad programme covers several of the same nationalities, with a 45-day decision. Both count towards permanent residence, which a working holiday never does.
If a parent or grandparent was a Czech or Czechoslovak citizen, try our Citizenship by Descent quiz first; it has no age limit.