Off by One is where Can Duruk writes about engineering, management, and engineering management.https://justoffbyone.com/https://justoffbyone.com/posts/math-of-why-you-cant-focus-at-work/https://justoffbyone.com/posts/math-of-why-you-cant-focus-at-work/Interruptions, recovery time, and task size: three numbers that determine if you'll get real work done. Interactive visualizations show the math behind bad days.Mon, 24 Nov 2025 00:00:00 GMThttps://justoffbyone.com/posts/take-home-exercises/https://justoffbyone.com/posts/take-home-exercises/How to design effective take-home exercises that assess both ability and interest, with practical guidelines on scope, payment, and AI-assisted workFri, 31 Oct 2025 00:00:00 GMThttps://justoffbyone.com/posts/trailing-slash-tax/https://justoffbyone.com/posts/trailing-slash-tax/A deep dive into how GitHub Pages handles trailing slashes, the hidden redirect cost, and why every millisecond matters for user experienceTue, 28 Oct 2025 00:00:00 GMThttps://justoffbyone.com/posts/interactive-hiring-pipeline-calculator/https://justoffbyone.com/posts/interactive-hiring-pipeline-calculator/Calculate how many candidates you need to reach out to make one hire based on your conversion rates.Sun, 26 Oct 2025 00:00:00 GMThttps://justoffbyone.com/posts/how-to-run-11s/https://justoffbyone.com/posts/how-to-run-11s/A practical, repeatable framework for running weekly engineering 1:1s using the People, Product, Process structure—with exact scripts, Notion setup, and tips for making them actually useful.Tue, 21 Oct 2025 00:00:00 GMThttps://justoffbyone.com/posts/measuring-engineering-productivity/https://justoffbyone.com/posts/measuring-engineering-productivity/A lightweight system for measuring engineering productivity that puts the overhead on managers, not engineers—using changelogs, standups, and visibility over surveillanceFri, 17 Oct 2025 00:00:00 GMThttps://justoffbyone.com/posts/paying-the-soc2-screenshot-tax/https://justoffbyone.com/posts/paying-the-soc2-screenshot-tax/How Vanta turned SOC2 compliance into a $4B business and why startups are paying the screenshot tax instead of building productsThu, 31 Jul 2025 00:00:00 GMThttps://justoffbyone.com/posts/everything-is-content-now/https://justoffbyone.com/posts/everything-is-content-now/Reflecting on content creation, consumption, and what it means to work in an industry where I still don't fully understand what "content" isSun, 24 Jan 2021 00:00:00 GMThttps://justoffbyone.com/posts/chuck-norris-hacking-twitter/https://justoffbyone.com/posts/chuck-norris-hacking-twitter/The 2020 Twitter hack exposed systemic security failures—and why companies need stricter regulations for protecting prominent accountsSun, 02 Aug 2020 00:00:00 GMThttps://justoffbyone.com/posts/job-interviews-farce/https://justoffbyone.com/posts/job-interviews-farce/Why hiring decisions are chaotic and random at the individual level—and what both candidates and companies can do about itThu, 27 Feb 2020 00:00:00 GMThttps://justoffbyone.com/posts/zombie-apocalypse-scale/https://justoffbyone.com/posts/zombie-apocalypse-scale/A thought experiment: measure how much of a "tech company" you are by how long you could run if all employees turned into zombies overnightTue, 04 Feb 2020 00:00:00 GMThttps://justoffbyone.com/posts/defense-of-biometrics/https://justoffbyone.com/posts/defense-of-biometrics/Why biometric authentication is better than passwords—and how to think about the political implications of widespread biometric systemsWed, 11 Dec 2019 00:00:00 GMThttps://justoffbyone.com/posts/jokes-you-invented-bad-jokes/https://justoffbyone.com/posts/jokes-you-invented-bad-jokes/Why the "X, you invented X" Twitter joke misses the point—business model innovation matters more than technology innovationTue, 22 Oct 2019 00:00:00 GMThttps://justoffbyone.com/posts/please-make-money/https://justoffbyone.com/posts/please-make-money/Why the desire to turn profits keeps businesses focused—and why pretending you don't want to make money is worse than admitting you doWed, 02 Oct 2019 00:00:00 GMThttps://justoffbyone.com/posts/delete-your-tweets/https://justoffbyone.com/posts/delete-your-tweets/Why ephemeral social media presence beats permanent archives—and how regularly deleting tweets can free you from past opinionsTue, 30 Jul 2019 00:00:00 GMThttps://justoffbyone.com/posts/startup-options-good-bad-ugly/https://justoffbyone.com/posts/startup-options-good-bad-ugly/Should you take equity or cash at an early-stage startup? Exploring the tradeoffs when growth capital makes liquidity a decade awayTue, 09 Apr 2019 00:00:00 GMThttps://justoffbyone.com/posts/instagram-too-big-not-to-mess-with/https://justoffbyone.com/posts/instagram-too-big-not-to-mess-with/With the photo app's founders gone, Facebook is now positioned to change Instagram significantly and transform it into a growth funnel.Fri, 28 Sep 2018 00:00:00 GMThttps://justoffbyone.com/posts/working-at-digg/https://justoffbyone.com/posts/working-at-digg/A first-hand account of working at Digg during the controversial V4 launch—the excitement, challenges, and lessons learnedSat, 19 May 2012 00:00:00 GMT