Jonah Back
@jonahback
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engineer and explorer
Los Gatos, CA
Joined September 2009
Sort of telling with buyback authorizations re: how companies think of their future. In a world where every pure SaaS company is at an all time high disruption risk, you’d think that money might be better spent on creating AI native experiences #AtomsNotBits
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Most data teams are still building dashboards nobody looks at. We killed 1,400 of ours. Replaced them with a semantic layer you can talk to. Built custom AI tooling that replaced SaaS we were paying six figures a year for. Every person on this @Opendoor data team has unlimited
opendoor.com
Opendoor is the new way to sell your home. Skip the hassle of listing, showings and months of stress, and close on your own timeline. Get a free offer today!
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Last shirt said "Faster." Sneak peek at what this one says. Limited drop at https://t.co/CLod0wEehF now powered by @shop. Don't miss Q4 Financial Open House tomorrow 2/19 at 2pm PT on X, Robinhood, and YouTube.
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One of the most underrated things about AI driven automation. Mistakes are easy to fix. We had a bug in our assessment process yesterday. 3 months ago, that would’ve meant 2am pages, lot of overtime and delayed offers. Today we basically just hit ‘retry’ after a fix.
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For anyone in a software engineering leadership/management position, this is the time to see if you can figure out how to shelve that responsibility for a while and return to being a full time IC. Software engineering has changed more in the last few months than it has in the
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We’re doing a fun thing @Opendoor a lot more recently. Instead of beleaguering folks - esp founders - with typical tech interview loops, we’re just building in person together. 2 weeks of side by side crafting, focusing on delivering customer value.
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My F5 key is broken today from refreshing my “Sonnet 5” Google Search every 5 minutes
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Related - we shipped a pretty meaningful change to how we work over the last few weeks. Many internal productivity asks around access, enablement etc all get served by agents with policy docs instead of people - enabling us to stay laser focused on enabling product velocity.
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One of the most important decisions we continue to make day in and day out at @Opendoor is to bet on the partners that we think deserve to win in the ai-native landscape of tomorrow. Apps that enable agents > apps that are perfect for the needs of today
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Or @Opendoor. Use all the tokens you could possibly want.
At YC, we let our engineers let it rip. There is no limit to the number of tokens you get. If you're at a place that is stingy with tokens, and you have that need for a speed, come to YC and let it rip. https://t.co/oYI6ze7Pz7
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I prefer the Ghibli style myself - pretty cool!
We built a thing. Turn your home into a tiny diorama, Wes Anderson scene, or retro video game world. Can you guess this famously fresh TV home? Try it free: https://t.co/JDmMNanM09
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Client wanted multi-region active-active. I talked them out of it. Their situation: - 2,000 daily users, all in Western Europe - 99.9% uptime requirement - 18-month runway - 3 engineers total What they actually needed: - Single region with proper HA - Multi-AZ database with
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For the first time in many, many years, Opendoor’s core workhorse is on a modern version of Rails. Monoliths and monorepos are the most AI-friendly way to move #faster
I sent this to all of our engineers on my third day at @Opendoor. It genuinely may be my single most important contribution to our long term success thus far.
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Hire out of pain. Don't hire because you think you'll need someone soon or maybe sometime later. Wait until you or your team are actually hurting: working weekends, missing family dinners, dropping balls. That pain is the signal that the role is real. I learned this the hard way
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I saw a guy coding today. No Okara. No Cursor. No OpenCode. No Claude Code. He just sat there, typing code manually. Like a psychopath.
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