Doppler was ambitious and teaching elementary mathematics at the Technical School was not greatly to his liking. He tried for a post of professor of higher mathematics at the Polytechnic in Prague but without success.
Doppler ay mapag-adhika at pagtuturo sa matematika sa elementarya ang Technical School ay hindi malaki sa kanyang gusto. He tried para sa isang post ng mga propesor ng mas mataas na matematika at ang politeknik sa Prague ngunit walang tagumpay.