
Software Engineer @Apple (Tools&Frameworks)
Cupertino, CA
Joined June 2010
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Come join us at Apple to build computer use that rocks!
jobs.apple.com/en-us/details…
Bartosz Polaczyk retweeted
Last Tuesday’s WWDC event — live from Steve Jobs Theater — is now online. Some great stuff here on Apple Intelligence and agentic coding with Xcode. 👀
youtu.be/Wpwjqk1UGnQ?is=kO5q…
Proud to share a feature we've been working hard on! In Xcode 27.0, Agentic Xcode can automatically find runtime bugs for you. After a code change, it installs the app in a simulator, navigates your UI, observes the screen and validates that the feature works flawlessly ... (1/2)
Bartosz Polaczyk retweeted
Xcode now supports coding agents from Anthropic and OpenAI 😁
apple.com/newsroom/2026/02/x…
Bartosz Polaczyk retweeted
🔺iPhone models announced today include Memory Integrity Enforcement, the culmination of an unprecedented design and engineering effort that we believe represents the most significant upgrade to memory safety in the history of consumer operating systems. security.apple.com/blog/memo…
Bartosz Polaczyk retweeted
🤖 What happens when your AI chatbot knows everything your engineering org knows? Way faster answers on everything from corporate policies to internal APIs and more. 🎧 Listen: hubs.ly/Q03CMkq80
Instruments' CPU Bottlenecks and Processor Traces are truly game changers for code optimization:
developer.apple.com/videos/p… #wwdc2025
If you want to learn how to speed up your UI test authoring in Xcode 26 using recording , watch "Record, replay, and review" session by @MaxHarlynking developer.apple.com/videos/p…
Bartosz Polaczyk retweeted
Open sourcing Xcode's build engine -- introducing swift-build: swift.org/blog/the-next-chap…
Bartosz Polaczyk retweeted
🚀 Help millions of developers build faster apps at Apple!
I’m hiring Performance Tools Engineers to develop Xcode Instruments and create next-generation profiling tools and visualizations targeting all Apple platforms.
📍 Location: Cupertino
🛠️ Tech: Swift, Objective-C, SwiftUI, AppKit
Apply: jobs.apple.com/en-us/details…
Bartosz Polaczyk retweeted
My SwiftConf 2023 talk about App Size @ Spotify is on YouTube now! youtube.com/watch?v=v3rYaEXz… #iosdev #swiftlang
Open-sourcing XCBuildAnalyzer, a macOS app to visualize Xcode build system graph.
Details are available at Inspecting Xcode’s build system graph at ease: link.medium.com/zL8UB8G5mDb
The tool is still in an experimental phase but should be functional already.
github.com/polac24/XCBuildAn…
Bartosz Polaczyk retweeted
If anybody affected by the layoffs is interested, my team at Square is looking for an engineering manager for the Android Foundation team (core frameworks used to build all of our apps) and a product manager for our core mobile projects. jonm at squareup dot com to connect.
Even Xcode 14b1 doesn't contain watchOS or tvOS runtime by default, you can manually download dmg and place its content in Xcode's Developer/Platforms/WatchOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/watchOS.simruntime. Useful on CI to not pollute home directory
I open-sourced a tool to merge several Xcode .dia files into a single file. Could be useful in a Bazel-Xcode integration - multiple per-source-file .dias generated by compilers in a Bazel build can be exposed to Xcode from a single "fake" compilation step: github.com/polac24/dia-merge











