Slack enables people all over the world to communicate and collaborate together. Teams of all scales — from large public companies to small startups — use Slack to get work done, so we take performance and reliability very seriously. A taste of our scale:
For millions of people, Slack is the primary communication tool they use at work all day long. They expect it to be exceptionally reliable and fast, all the time.
Infrastructure at Slack
We operate at tremendous scale with systems that process millions of events per second. Our team maintains and builds the lower levels of our web stack, including:
We know we’ve done our job correctly when none of our users notice. We don’t typically ship new user-facing features, but rather ensure our systems are incredibly performant, highly available, and scalable. In other words, Slack just works seamlessly.
Slack's API and web backend is built on PHP/Hack, and our backend services are written in Java and Go. Our data infrastructure is built on Kafka, Hadoop, Hive, Presto, Spark, and MySQL. Keith Adams (our Chief Architect) spoke at QCon in 2016 about our architecture.
We are a small team making a large impact. We rapidly iterate and work closely with other teams in engineering to ensure we build resilient systems that can scale. We have a strong commitment to quality and understand that simplicity and reliability should be primary aspects of the systems that we build. We are scrappy, independent, and pragmatic.
If you were to join Slack, here are the kinds of things you would do over the course of a typical week:
You may be a fit for this role if you:
Infrastructure is a diverse and inclusive team that treats their colleagues exceptionally well. We are happy to help you learn what you need to know; we encourage and support each other’s growth and thus it’s not expected that any single candidate would have expertise across all of these areas.
We look forward to working with you!
Slack is a messaging app for teams that is on a mission to make your working life simpler, more pleasant, and more productive. We believe everyone deserves to work in a welcoming, respectful, and empathetic culture. We live by our values and hire accordingly.
Launched in February 2014, Slack is the fastest growing business application ever and is used by thousands of teams and millions of users every day. Slack's investors include many of the best-recognized firms in the world, including Accel Partners, Andreessen Horowitz, Social+Capital, KPCB, Google Ventures, Horizons Ventures, IVP, Spark Growth, DST, and Index Ventures. We currently have five offices worldwide, in San Francisco, Vancouver, Dublin, Melbourne and New York.
Ensuring a diverse and inclusive workplace where we learn from each other is core to Slack's values. We welcome people of different backgrounds, experiences, abilities and perspectives. We are an equal opportunity employer and a fun place to work. Come do the best work of your life here at Slack.