Retired computational astrophysicist Interpretability at Anthropic; prev Google DeepMind, Simons Foundation, Journal of Open Source Software (he/him) https://dfm.io // https://github.com/dfmhttps://bsky.app/profile/dfm.iohttps://bsky.app/profile/dfm.io/post/3mca6ntzf2c26I don’t have much time in my life for fun hack projects these days, but I’ve always wanted to learn how custom Bluesky feeds work, so I managed to sneak some hacking in over the weekend while the kids were sleeping and built a “Found Haikus” feed: https://bsky.app/profile/dfm.io/feed/haiku [contains quote post or other embedded content]12 Jan 2026 13:50 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3mca6ntzf2c26https://bsky.app/profile/dfm.io/post/3ltzlfaghpc2lNow that I don’t work in astro research anymore (and because I’m on parental leave), it is time to retire from @joss-openjournals.bsky.social. It’s been an amazing 5 years supporting open source software in academic astrophysics, and I’m excited to see what the future holds for JOSS!15 Jul 2025 18:56 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3ltzlfaghpc2lhttps://bsky.app/profile/dfm.io/post/3le4xkth6i22zNow that I write code as a full-time job, I didn't think I would do adventofcode.com this year, but I couldn't stop myself. I just finished collecting all the stars, and it was great fun as always! Thanks for the fun ride, @was.tl! https://adventofcode.com/25 Dec 2024 12:29 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3le4xkth6i22zhttps://bsky.app/profile/dfm.io/post/3lctcuiqkok2cWhen my kid was born, we were gifted all of those "Science X for Babies" books (IYKYK), and at 1.5 he has decided that they are the only books we ever read just to spite us… At least he reaches for "Bayesian Probability" more frequently than "Astrophysics", proving that he's my child! 🤣08 Dec 2024 22:59 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3lctcuiqkok2chttps://bsky.app/profile/dfm.io/post/3kpuik3437u2xSome news: in a few weeks I'll be leaving the Flatiron Institute to join Google DeepMind where I'll be working on the JAX core dev team. It's bittersweet to leave astro which (for better or worse) has defined much of my identity for the past 15 years, but I'm excited about new adventures!11 Apr 2024 15:15 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3kpuik3437u2xhttps://bsky.app/profile/dfm.io/post/3kmdeyyt3562oReposting for the weekday crowd! [contains quote post or other embedded content]26 Feb 2024 15:41 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3kmdeyyt3562ohttps://bsky.app/profile/dfm.io/post/3km647gvfwg25I'm not on the astro lists here... Please share this there if you are. Thanks! [contains quote post or other embedded content]24 Feb 2024 13:20 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3km647gvfwg25https://bsky.app/profile/dfm.io/post/3km642np2wd2zApplications are open for the pre-doc program at the CCA! This program is for current astro grad students to come visit NYC for 5 months and collaborate with a CCA scientist on a research project. I ❤️ this program so much!! Please apply and/or share! https://www.simonsfoundation.org/flatiron-institute-center-for-computational-astrophysics-pre-doctoral-program/24 Feb 2024 13:17 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3km642np2wd2zhttps://bsky.app/profile/dfm.io/post/3klsacvcftm2xjust found a jar of jam in our cupboard with a best before date of Feb 2020. that jam really is from a different era!19 Feb 2024 20:02 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3klsacvcftm2xhttps://bsky.app/profile/dfm.io/post/3kgbr7z2vok2qToday's #AdventOfCode is coming for your Large Scale Structure research program! adventofcode.com/2023/day/1111 Dec 2023 15:43 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3kgbr7z2vok2qhttps://bsky.app/profile/dfm.io/post/3kf6whup7fo2dadventofcode.com starts on Friday! 🚀 Advent of Code is a daily coding challenge Dec 1-25 that is fun in ways that I can't totally put my finger on. I normally use it as a way to learn a new language, but with a 5-month-old, I'm sticking to Rust again this time around: https://github.com/dfm/adventofcode27 Nov 2023 19:14 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3kf6whup7fo2dhttps://bsky.app/profile/dfm.io/post/3kdz33i5fvn2oI assume everyone deals with burnout by switching to a new code editor, right? [I'm going back to vim (actually neovim) after a few years in vscode land…]12 Nov 2023 17:55 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3kdz33i5fvn2ohttps://bsky.app/profile/dfm.io/post/3kdcjjqk3f62gMy tutorial demonstrating how to implement custom C++ and CUDA ops for JAX (jax.readthedocs.io) was horribly out of date, but thanks to a few PRs it is now up to date with the current best practices: https://github.com/dfm/extending-jax03 Nov 2023 18:42 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3kdcjjqk3f62ghttps://bsky.app/profile/dfm.io/post/3kbd375j2ex2nOver at JOSS (joss.theoj.org) we're looking to recruit more editors in all areas! Check out the blog post for more info, and I'd be very happy to chat: https://blog.joss.theoj.org/2023/10/call-for-editors09 Oct 2023 13:08 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3kbd375j2ex2nhttps://bsky.app/profile/dfm.io/post/3k7syzu6p3c2m🤯 [contains quote post or other embedded content]20 Sep 2023 10:22 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3k7syzu6p3c2mhttps://bsky.app/profile/dfm.io/post/3k7rzgfccta2vSpeaking of hiring… don't forget about these two long-term astronomical software development roles with a deadline of Dec 1! [contains quote post or other embedded content]20 Sep 2023 00:56 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3k7rzgfccta2vhttps://bsky.app/profile/dfm.io/post/3k7rz5t2zxd22We're hiring postdoc fellowship positions at the Center for Computational Astrophysics! 3 year FRF: apply.interfolio.com/132546 5 year FSRF (focus on software development): apply.interfolio.com/132547 This is a great place to work & these are awesome jobs! Please share & reach out with questions!!20 Sep 2023 00:51 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3k7rz5t2zxd22https://bsky.app/profile/dfm.io/post/3k6744vuvhy2aOver at JOSS (joss.theoj.org) we're looking for two reviewers for a submission of a Python package for ML classification of gamma-ray bursts observed with Swift. Any volunteers or suggestions would be appreciated! More info on the pre-review thread: https://github.com/openjournals/joss-reviews/issues/5488 https://joss.theoj.org/30 Aug 2023 18:59 +0000at://did:plc:tns4iemrolsg5yjqbitb5jur/app.bsky.feed.post/3k6744vuvhy2a