Translate the following English sentence to French:
"They are also to be found among part-time workers who, in addition, are working at night and in the evenings on their computers, as well as among the self-employed who do additional work they do not declare."
Il existe aussi des travailleurs au noir parmi les travailleurs à temps partiel, qui continuent à être actifs la nuit devant leur ordinateur, et parmi les indépendants qui ne déclarent pas toutes leurs activités lucratives.