Senior iOS Performance Engineer

Slack is looking for a Senior Software Engineer with experience building high-performance iOS apps that get the job done. We love engineers who believe performance is a key feature of every product we build, and don't mind digging into some stack traces to make things faster. We love performance optimization, improving maintainability, and iterating on best-practices with the rest of the iOS teams. Our team is cultivating a culture of performance at Slack.

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 remote and reports to one of our engineering managers.

What we are looking for:

  • You have extensive experience building iOS applications, and can share many platform quirks.
  • Experience using tools such as Instruments to debug and improve application performance. 
  • You have experience fixing memory leaks in an iOS application, and wouldn’t mind doing it again.
  • You would love to help improve not only our application’s performance, but also the telemetry stack in use. 
  • 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 comfortable with SQL and making sense of data.
  • 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. 



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