I worked at a place with remote and onsite employees, and I think two of major reasons it worked is because we had a habit of documenting all designs and projec

I worked at a place with remote and onsite employees, and I think two of major reasons it worked is because we had a habit of documenting all designs and projects in a wiki, and used Skype at all of our meetings (while sending an invite out before hand to anyone tangentially related so they could sit in if they felt the need to). The wiki would inevitably get out of date, but it usually gave you a good big picture and the edit history let you know who to track down for questions. All of the development teams were also on Slack, and many people tended to have those quick side conversations online instead of in person, so there was a public searchable record and you could jump in more easily.