This is the 1934th most frequent Russian word.
разработчиков
Developers.
The word 'разработчиков' is used in the accusative plural form, indicating individuals who are developers being the direct object of the invitation.
Разработчиков пригласили на конференцию о новых технологиях.
The developers were invited to a conference about new technologies.
Here, 'разработчиков' is in the genitive plural form, showing possession, 'of developers'.
Компания увеличила зарплату разработчиков.
The company increased the salaries of developers.
The word 'разработчиков' is again in the genitive plural form, indicating possession or association, 'of developers' in relation to their problems.