Office messaging app Slack has raised $250 million in a funding round led by the Japanese tech giant SoftBank , putting its total valuation at $5.1 billion. Slack group for Product Supervisor HQ, the main resource for learning the way to break into PM as well as succeeding on the job! A friendly Slack neighborhood for Android builders with 350+ members and counting. Department Playbooks All kinds of teams thrive with Slack — take a look at our division-specific guides. Slack’s own workers reportedly adhere to the principle Work onerous, then go home.” They have nonetheless created a product that encourages the other: Work half-distractedly, then maintain doing that no…