David Eisinger

Dispatch #29 (July 2025) (2025-07-03)

Big month: birthdays, travel, lots of music. My boy turned one – time friggin’ flies. He is on the move, talking up a storm, and getting into everything.

Dispatch #28 (June 2025) (2025-06-05)

Bamboo killing season is over, now we’re onto goddamn cockroach season. I’ve lived in the South for a quarter century but I don’t think I’ll ever get used to seeing one of those things scurry across the floor. We went down to Lake Norman for Memorial Day weekend, spent a bunch of time on the new (to us) pontoon boat. So much fun. The kids loved it, and I look forward to many more years with them out on the water.

Dispatch #27 (May 2025) (2025-05-10)

Pollen season is over. Bamboo killing season is here. Lots to cover this month. Let’s go. Just got back from a week-long company gathering, starting in Falls Church, VA near where I grew up and heading up to River Mountain. Great to see everyone in person (and catch up with a few of my favorite former coworkers). Major thanks to my parents for taking care of the kids and animals (and also for coming down to help out while Claire took a staycation at a loft downtown).

Dispatch #26 (April 2025) (2025-03-31)

Nico received a major software upgrade this month. One day he could barely roll over, the next he’s crawling, getting into stuff, maybe even talking? (It’s a little hard to tell but I’m going with “dada” as his first word.) We finally got Nev out of the Pack ’n Play she’s been sleeping in since she moved out of our room and into a proper bed. She loves it, and it’s great that she can just get out of bed and come downstairs by herself when she’s ready to start her day.

Dispatch #25 (March 2025) (2025-03-04)

My family popped down for an unplanned visit, just in time for another big snow – felt like Christmas in February. Claire headed to Mexico with some friends, and it was great to have help with the kids, but it was also pretty special to be Nico’s guy for three days. A lot of the primary parenting duties fall to Claire, and he’s not going to be a baby much longer, so I’m glad we got that time.

Local Docker Best Practices (viget.com, 2022-05-05)

Here at Viget, Docker has become an indispensable tool for local development. We build and maintain a ton of apps across the team, running different stacks and versions, and being able to package up a working dev environment makes it much, much easier to switch between apps and ramp up new devs onto projects. That’s not to say that developing with Docker locally isn’t without its drawbacks¹, but they’re massively outweighed by the ease and convenience it unlocks.

“Friends” (Undirected Graph Connections) in Rails (viget.com, 2021-06-09)

No, sorry, not THOSE friends. But if you’re interested in how to do some graph stuff in a relational database, SMASH that play button and read on.

Making an Email-Powered E-Paper Picture Frame (viget.com, 2021-05-12)

Over the winter, inspired by this digital photo frame that uses email to add new photos, I built and programmed a trio of e-paper picture frames for my family, and I thought it’d be cool to walk through the process in case someone out there wants to try something similar.

Why I Still Like Ruby (and a Few Things I Don’t Like) (viget.com, 2020-08-06)

The Stack Overflow 2020 Developer Survey came out a couple months back, and while I don’t put a ton of stock in surveys like this, I was surprised to see Ruby seem to fare so poorly – most notably its rank on the “most dreaded” list. Again, who cares right, but it did make me take a step back and try to take an honest assessment of Ruby’s pros and cons, as someone who’s been using Ruby professionally for 13 years but loves playing around with other languages and paradigms. First off, some things I really like.

The AI-Native Software Engineer (2025-07-09)

A practical playbook for integrating AI into your daily engineering workflow

Today I’m on the way to RailsConf. | Chad Fowler (2025-07-08)

RailsConf isn’t just ending. It’s gasping in the shadow of a new world in which code is no longer written by us, and no longer written for us. I’m going to say goodbye. To Rails, yes. But also to the idea that code was ever meant to be a human craft?

Full-breadth Developers | justin․searls․co (2025-07-08)

The software industry is at an inflection point unlike anything in its brief history. Generative AI is all anyone can talk about. It has rendered entire product categories obsolete and upended the job market. With any economic change of this magnitude, there are bound to be winners and losers. So far, it sure looks like full-breadth developers—people with both technical and product capabilities—stand to gain as clear winners.

Opinion | Sarah McBride on Why the Left Lost on Trans Rights - The New York Times (2025-06-26)

Maybe it is hurtful, but you can’t foster social change if you don’t have a conversation. You can’t change people if you exclude them. And I will just say, you can’t have absolutism on the left or the right without authoritarianism.

Generative AI as a magic system – Tracy Durnell's Mind Garden (2025-06-25)

We treat generative AI like magic… and magic systems have rules. When creating fantasy worlds, writers think about who can use magic, how magic is performed, what it’s able to do, what its constraints are, what the source of magic is, and what it costs. I’m applying a bit of reverse worldbuilding to the real world to extrapolate the rules of the AI magic system.

Toward A Theory Of Kevin Roose (2025-06-20)

My suspicion, my awful awful newfound theory, is that there are people with a sincere and even kind of innocent belief that we are all just picking winners, in everything: that ideology, advocacy, analysis, criticism, affinity, even taste and style and association are essentially predictions. That what a person tries to do, the essential task of a person, is to identify who and what is going to come out on top, and align with it.

Helix (2025-06-20)

It's pretty nice! It launches quickly. No plugin system so the futzmonkey sort of has to stay in its cage, but it's very batteries-included. I found a tutorial for setting it up for Markdown that wasn't overwhelming and helped me get a sense of how its config works.

How Field Notes went from side project to cult notebook (2025-06-18)

Two decades after Aaron Draplin and Jim Coudal launched Field Notes, the analog notebook company is crushing it in the digital age.

My AI Skeptic Friends Are All Nuts · The Fly Blog (2025-06-05)

And here I rejoin your company. I read Simon Willison, and that’s all I really need. But all day, every day, a sizable chunk of the front page of HN is allocated to LLMs: incremental model updates, startups doing things with LLMs, LLM tutorials, screeds against LLMs. It’s annoying! But AI is also incredibly — a word I use advisedly — important. It’s getting the same kind of attention that smart phones got in 2008, and not as much as the Internet got. That seems about right.

Opinion | There’s a Link Between Therapy Culture and Childlessness - The New York Times (2025-06-01)

I thought of the love I felt for the unborn little thing within me — just then, just beginning to make its presence known with a kick and flutter and a flip — and I felt bowled over by all that I had not understood. The love my parents had felt, do feel, that I had recognized in the abstract, I had so often overlooked.