If you want to deal with an envious co worker person, the best way is to stay confident and happy. Jealous people feel annoyed when they see others succeed, so ignoring their negativity and focusing on yourself will bother them the most.

You can also be kind to them, which can make them even more frustrated. dealing with a jealous coworker is just to show them that you are fine

You can also learn to Keep your interactions factual, clear, short, work-focused, and avoid emotional responses. You don’t need to over-explain your boundaries, and you don’t need to answer inappropriate questions.

Understand the psychology of envy. If you dig deep enough, envy is usually just a cover for profound feelings of insecurity, fear, and shame.