| Website | https://jedfox.com |
| Observable | https://observablehq.com/@j-f1 |
| GitHub | https://github.com/j-f1 |
| https://tweets.jedfox.com |
RE: https://mastodon.social/@jedfox/115386150175989951
My team has a last-minute opening for this position. If you (or someone you know) are still looking for a summer internship and are familiar with iOS/macOS development this is a great opportunity!
Please DM me your resume or feel free to ask any questions.
The Xcode 26.4 beta is out with some really cool features in Instruments! Instruments now has a new Run Comparison feature that allows you to compare call trees across runs so you can quickly verify your performance optimizations (or catch any regressions).
We also have a new Top Functions mode. This new top level mode on the call tree makes it really easy to identify the most expensive functions in the trace no matter where they are called from.
Best part is that these features can be used together to help you optimize your code!
Full release notes: https://developer.apple.com/documentation/xcode-release-notes/xcode-26_4-release-notes
RE: https://infosec.exchange/@madcoder/115466826731130245
Now I finally understand why thr C++ member initializer syntax is spelled the way it is
The Profiling Tools team at Apple is looking for interns! We work on the Instruments app, delivering performance insights to developers inside and outside Apple. I’ve really enjoyed this team because we get to work with a lot different people to develop useful tools, and build a lot of personal knowledge along the way.
If you’re interested, feel free to DM me your resume or reply with any questions! In person in Cupertino, for students who will be attending college in the 2026–27 school year.
This year we have a brand new CPU counters instrument that reimagines what profiling CPU counters looks like, rather than manually configuring HW counters you will be given a guided approach with understandable metrics & documentation in guiding micro-optimizations. We hope that this new tool makes understanding & optimizing your code using CPU counters much more approachable for developers of all experience levels.
Watch this Optimize CPU performance with Instruments talk. This talk covers CPU profiling from the ground up, covering CPU profiler, Processor Trace, and CPU Counters. This is a fantastic talk I would recommend to every developer, especially those new to profiling & performance work.
https://developer.apple.com/videos/play/wwdc2025/308
fine print: this position currently requires that you be in person in an office in Cupertino 3 days a week.
If you have questions about the role, feel free to reply or DM!
My team at Apple is hiring! We work on all parts of Instruments — from interacting with OS-level data sources to building the UI components that present that information in an understandable and actionable manner. I really love this job because there are so many different kinds of problem to solve, and we sit at the confluence of a wide variety of other teams’ work. It’s also a rare opportunity to work on a native Mac app :)
If this sounds interesting to you, apply here: https://jobs.apple.com/en-us/details/200577790/developer-tools-performance-tools-engineer
We’re growing our product team!
Are you an #iOS Developer who wants to lead our official #Mastodon iOS #App?
This is a remote full-time position and requires an overlap with the CET timezone.
Ideally:
1. You are a senior iOS Developer comfortable with a mature codebase
2. Proficient in #Swift and #Apple Frameworks (UIKit, SwiftUI, Combine)
3. Prior experience with social media networks is a big plus!
For more info/to apply:
https://jobs.ashbyhq.com/mastodon/bc91c481-d30a-4e73-9eb8-ac29f4e905e2
Harjas Monga
Mastodon Engineering