Hacker News: mgriepentrog

New comment by mgriepentrog in "Ask HN: Who wants to be hired? (July 2025)"

mgriepentrog — Tue, 01 Jul 2025 21:48:58 +0000

  Location: Oakland, CA
  Remote: Preferred
  Willing to relocate: No
  Technologies: Ruby/Rails, React/React Native, iOS/Objective-C, C/C++, Linux kernel, PostgreSQL, Docker, K8s
  Résumé/CV: https://drive.google.com/file/d/1dnRhpwK4a4ef-MlhPjajwTD4iahRp2N0/view?usp=sharing  
  Email: see resume
  LinkedIn: https://www.linkedin.com/in/mgriepentrog/
  GitHub: https://github.com/mgriepentrog

Full-stack engineer with experience across multiple domains looking for an individual contributor role. Systems/embedded: Linux kernel drivers, firmware development, wireless (with published systems research). Mobile: iOS native apps, React Native, Objective-C. Backend: Rails at scale (serving 1M+ devices), multi-tenant systems, CI/CD.

I enjoy root cause analysis, making data driven decisions, and improving developer experience (CI/CD, testing patterns, metrics). Comfortable tackling problems wherever they live in the stack and picking up whatever technologies are needed to ship. Previously engineering manager and technical lead with 11+ years of experience.

New comment by mgriepentrog in "Everyone knows all the apps on your phone"

mgriepentrog — Sun, 30 Mar 2025 04:56:06 +0000

Apple introduced account-driven enrollments in 2021[1], which behaves similar to Android's work profile. Managed apps/data are kept in its own APFS volume, and MDM servers don't have access to anything outside of it. They also disallow system-wide commands like wipe device. The only caveat is you need managed Apple IDs[2] to use this enrollment flow, and I doubt many companies have set it up.

Regardless, MDM installed app visibility is limited to those users who opt-in to an organization managing their personal device, and isn't an effective way to broadly gather what apps a given person has installed. What's described in this post would work on any user/device, and there's no way to deny/opt-out of specific permissions.

[1] https://developer.apple.com/videos/play/wwdc2021/10136/ [2] https://support.apple.com/guide/apple-business-manager/use-m...

New comment by mgriepentrog in "Ask HN: Would you still choose Ruby on Rails for a startup in 2025?"

mgriepentrog — Tue, 28 Jan 2025 23:11:30 +0000

The statement that Rails is an "unserious" framework is not true. There are many multi-million/billion dollar companies built with Rails: Shopify, GitHub, Chime, Gusto, GitLab, and Basecamp/Hey, to name a few.

1. It does: https://github.com/Shopify/ruby-lsp

2. It does have a type system, just not a _static_ type system. You can declare/annotate methods using RBS/Sorbet, just like TypeScript.

3. I don't care what paradigm is being used if it solves my problem and I can be productive in it.

4. I wouldn't want to work with them either.