The mere mentioning of previous tasks and responsibilities in your CV / résumé is NOT sufficient to convince the reader of your competencies.
As many job seekers tend to struggle with that, I have dedicated my latest newsletter article on LinkedIn “Make Your Work Experience an Exciting Read in Your CV / Résumé” to providing you with an example of the right approach.
The article is an abbreviated version of my detailed explanations of the right approach you can find here.