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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>Brandon Barker, Staff Software Engineer</title><meta name="description" content="Staff software engineer at Uber building software that maps the world. Tinkerer, inventor, NYC."><meta name="theme-color" content="#5f82ff"><link rel="icon" type="image/x-icon" href="/images/favicons/favicon.ico"><link rel="icon" type="image/png" sizes="16x16" href="/images/favicons/favicon-16x16.png"><link rel="icon" type="image/png" sizes="32x32" href="/images/favicons/favicon-32x32.png"><link rel="apple-touch-icon" sizes="180x180" href="/images/favicons/apple-touch-icon-180x180.png"><link rel="apple-touch-icon" sizes="152x152" href="/images/favicons/apple-touch-icon-152x152.png"><link rel="apple-touch-icon" sizes="120x120" href="/images/favicons/apple-touch-icon-120x120.png"><meta property="og:site_name" content="Brandon Barker"><meta property="og:title" content="Brandon Barker, Staff Software Engineer"><meta property="og:description" content="Building software that maps the world. Staff SWE at Uber, NYC."><meta property="og:type" content="website"><meta property="og:url" content="https://brandonbarker.me/"><meta name="twitter:card" content="summary"><meta name="twitter:title" content="Brandon Barker, Staff Software Engineer"><meta name="twitter:description" content="Building software that maps the world. Staff SWE at Uber, NYC."><link rel="preconnect" href="https://fonts.googleapis.com"><link rel="preconnect" href="https://fonts.gstatic.com" crossorigin><link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=IBM+Plex+Sans:wght@400;500&display=swap"><link rel="stylesheet" href="/_astro/Base.DJmKpLXX.css"></head><body><main class="wrap"><div class="topbar" id="top"><span class="prompt"><b>brandon@nyc</b> :~$ whoami<span class="cursor"></span></span><nav class="tabs"><a href="/" class="active">~/root</a><a href="/cv">~/cv</a></nav></div><h1 class="name">brandon barker</h1><pre class="ascii" aria-hidden="true"> ___ _ ___ _
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|___/_| \__,_|_||_\__,_\___/_||_| |___/\__,_|_| |_\_\___|_|</pre><p class="lede">tinkerer, inventor, nerd, staff software engineer. building tools that map the world, from <a href="/cv#prostheticarm">prosthetic arms</a> and <a href="/cv#boostogy">educational learning platforms</a>, to <a href="/cv#ioculist">eye exams</a> and <a href="https://medium.com/@comma_ai/hd-maps-for-the-masses-9a0d582dd274" target="_blank" rel="noopener noreferrer">self-driving hd maps</a>.</p><hr><section class="block articles posts" aria-label="writing"><div class="row"><div class="yr"><time datetime="2026-07-28">2026 jul 28</time></div><div class="what"><b><a href="/writing/headroom-fewer-tokens-bigger-bill">headroom cut 39% of my tokens and raised my claude bill</a></b><span>headroom cut 39% of input tokens off an agentic coding benchmark and the bill, if anything, went up. prompt caching is why, and most savings meters cannot see it.</span></div></div><div class="row"><div class="yr"><time datetime="2020-06-18">2020 jun 18</time></div><div class="what"><b><a href="https://www.wcupa.edu/president/bBarker.aspx" target="_blank" rel="noopener noreferrer">wcu junior produces 3d protective gear for frontline workers</a></b><span>3d printers in brandon's basement print covid-19 face shields, 20+ hrs/day, 7 days/week.</span></div></div><div class="row"><div class="yr"><time datetime="2019-08-06">2019 aug 06</time></div><div class="what"><b><a href="https://cesium.com/blog/2019/08/06/webodm-ships-with-cesium-ion/" target="_blank" rel="noopener noreferrer">share massive drone captures directly from webodm with cesium ion</a></b><span>integration: webodm-generated point clouds, 3d models, terrain → cesium ion in global geospatial context.</span></div></div><div class="row"><div class="yr"><time datetime="2019-07-08">2019 jul 08</time></div><div class="what"><b><a href="https://cesium.com/blog/2019/07/08/blender-addon/" target="_blank" rel="noopener noreferrer">massive models from blender with cesium ion</a></b><span>blender → gltf → ion add-on, using the official khronos exporter for streaming on the web.</span></div></div><div class="row"><div class="yr"><time datetime="2018-08-17">2018 aug 17</time></div><div class="what"><b><a href="https://medium.com/@comma_ai/hd-maps-for-the-masses-9a0d582dd274" target="_blank" rel="noopener noreferrer">hd maps for the masses</a></b><span>open-source comma maps + entium, visualizing recorded paths and lane markings beyond paywalls.</span></div></div><div class="row"><div class="yr"><time datetime="2016-12-15">2016 dec 15</time></div><div class="what"><b><a href="./downloads/quadtree_spatialhash.pdf" target="_blank" rel="noopener noreferrer">quad trees vs spatial hashes</a></b><span>collision-detection algorithm comparison: bucket-based vs recursive subdivision. (pdf)</span></div></div></section><hr><footer><span class="prompt"><b>brandon@nyc</b> :~$ contact</span><span><a href="mailto:contact@brandonbarker.me">email</a> · <a href="https://github.com/ProjectBarks" target="_blank" rel="noopener noreferrer">github</a> · <a href="https://www.linkedin.com/in/projectbarks/" target="_blank" rel="noopener noreferrer">linkedin</a></span></footer></main><script type="module" src="/_astro/Analytics.astro_astro_type_script_index_0_lang.C1QfwpSA.js"></script></body></html>