Marxist.org has this definition (https://www.marxists.org/glossary/terms/p/e.htm):

Petty-bourgeois

...

2) Also refers to the growing group of workers whose function is management of the bourgeois apparatus. These workers do not produce commodities, but instead manage the production, distribution, and/or exchange of commodities and/or services owned by their bourgeois employers.

While these workers are a part of the working class because they receive a wage and their livelihood is dependent on that wage, they are separated from working class consciousness because they have day-to-day control, but not ownership, over the means of production, distribution, and exchange.

That describes managers, maybe programmers writing internal software if you're really stretching it. Thanks for the definition though.