Job Description

Mobile Developer Experience (MDX) builds all necessary infrastructure and tools to ensure Square’s mobile development can continue to be fast and efficient at scale. This is a high force multiplier team aiming to enhance the developer experience for all iOS developers at Square. Our focus is on improving both the local IDE and CI experience when working within our massive and modularized monorepo codebase. We’re betting heavily on the future of Bazel. We’ve already made a 4x improvement on compilation speed and 2x improvement in CI turnaround, but there is still a lot more room for improvement. We do our work in the open, on GitHub, and progress can be seen in the bazel-ios project on GitHub. You’ll be part of a team on the cutting edge of iOS build engineering that contributes fixes and improvements to Bazel, maintains Xcode integration, delivers Bazel Remote Execution, and maintains a CDN based remote caching system.

You Will: 

• Accelerate our delivery of a fast and efficient developer experience with Bazel
• Amplify the efficiency of our mobile developers to develop, test, and release apps to our merchants
• Identify and fix performance bottlenecks in the development experience with novel solutions
• Debug and fix issues in large C++ and Java projects like clang, llvm, swift, lldb and Bazel
• Help determine the scope and the priorities of the team by identifying opportunities to decrease build times, reduce system complexity, and improve the developer experience
• Optimize the performance, and usability of our build tooling
• Oversee the success of our team’s projects, and achieve quantifiable results

Qualifications

• Passionate about accelerating the development velocity of other engineers and improving their developer experience as part of a larger team.
• Knowledge of build systems (preferably Bazel/Blaze/Buck)
• Knowledge of the roles that tools such as xcodebuild, clang, swift, ld, actool, ibtool, and codesign play in the process of generating build/test artifacts
• Experience supporting build and CI systems infrastructure at scale
• First hand experience building Apple apps in Swift or Objective-C (preferably both)
• Excellent software engineering knowledge and the ability to provide technical mentorship and guidance
• Experience with reverse engineering Xcode, macOS, or iOS software