"According to Durov, one of his top employees… revealed he'd been approached by the US govt. 'There was a secret attempt to hire my engineer behind my back by cybersecurity officers,'

'They were trying to persuade him to use certain #opensource tools that he'd then integrate into Telegram’s code that, in my understanding, would serve as #backdoors,’ Durov said, adding that he believes the employee’s account. 'There's no reason for my engineer to make up(such) stories.'~
https://www.rt.com/news/596068-fbi-wanted-backdoor-to-telegram/