Staff Frontend Performance Engineer

San Francisco, CA, United States
Posted 4 days ago
Main Location
United States
Open jobs

Slack is looking for a Staff Software Engineer with experience in behind-the-scenes JavaScript to get the job done. We love engineers who are more passionate about reading stack traces than writing CSS. We love performance optimization, writing unit tests, improving maintainability, and iterating on best-practices with the rest of the frontend teams.

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.


  • You know the weirdest parts of JavaScript and love working with it anyway.
  • You have extensive experience working with the performance profiling and debugging tools in your web browser of choice.
  • You love keeping up to date with the evolving capabilities of JavaScript, but know when to temper that excitement with caution.
  • You’ve worked with React (or at least understand why it’s important). Familiarity with Redux will also come in handy.
  • You’ve been working with front end frameworks and libraries professionally for 7+ years (and having contributed to some is a big plus.)
  • Diving into a new system to understand mysterious behavior excites you, and the phrase “things are slow, but only sometimes” sounds like the start of a great adventure
  • 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 a related field, or equivalent training, fellowship, or work experience.

Slack is an Equal Opportunity Employer and participant in the U.S. Federal E-Verify program. Women, minorities, individuals with disabilities and protected veterans are encouraged to apply. Slack will consider qualified applicants with criminal histories in a manner consistent with the San Francisco Fair Chance Ordinance.

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