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Front End Infrastructure & Performance Engineer

People love working on Slack — it is a complex web application used by millions of people for hours or even days at a time. Our engineering team is tasked with keeping it fast and reliable, and maintaining the systems that the rest of our frontend team uses to build their features.

We’re looking for a Senior Software Engineer with experience in behind-the-scenes JavaScript to get the job done — if you’re more interested in wrangling WebSockets than writing CSS, you’ll fit right in here. We love performance optimization, writing unit tests, improving maintainability, and iterating on best-practices with the rest of the frontend teams. We also work with backend infrastructure engineers to design new services to better support Slack clients.

Our work depends on working closely with other teams at Slack, so communication and collaboration skills are a must. This is an opportunity to work on a small team that directly affects how Slack’s desktop web client is built.

This position is based in San Francisco and reports to one of our engineering managers.

Requirements

  • You know the weirdest parts of JavaScript and love working with it anyway.
  • You know your way around the performance profiling and debugging tools in your web browser of choice.
  • You’re up to speed with WebSockets, Fetch, Promises, ES6, and beyond.
  • You’ve worked with React (or at least understand why it’s important). Familiarity with Redux and Lodash will also come in handy.
  • You’ve been working with front end frameworks and libraries professionally for 5+ years (and having built or contributed to some is a big plus.)
  • Diving into a new system to understand mysterious behavior excites you.
  • You write understandable, testable code with an eye towards maintainability and scalability.
  • You are a strong communicator and are equally comfortable talking with your immediate team, other frontend engineers, or even backend infrastructure engineers.
  • You are ready to learn, but just as excited to teach.
  • You understand that the perfect solution is informed by the people who will be building on your work, rather than being purely dependent on technical merits. Empathy is a feature.
  • You have a bachelor's degree in Computer Science, Engineering or related field, or equivalent training, fellowship, or work experience. 

Slack is where work happens. It connects you with the people and apps you work with every day, no matter where you are or what you do. 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 eight offices worldwide, in San Francisco, Vancouver, Dublin, Melbourne, New York, London, Tokyo, and Toronto.

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.