# Charles Harries (@charlesharri.es) Profile: https://sifa.id/p/charlesharri.es Headline: I use computers to solve problems — robustly. Location: Durham, England, United Kingdom ## About I build performant, legible, highly-available systems to solve healthcare problems in the United Kingdom. I'm just trying to leave things around here a little better than I found em. ## Career - **Senior Systems Engineer at NHS England** (Feb 2026 - Present) Leeds, England, GB · Hybrid I build the primary interface between the NHS and thousands of GP practices across England, Wales, and the Isle of Man. Part of this work includes safeguarding and deploying new features to the Personal Demographics Service. I also lead a live support team and participate in the on-call rota responding to incidents across the NHS Spine platform. ## Publications - Walking Ghyll, 24 September — charlesharri.es (Sep 2026) https://charlesharri.es/stream/walking-ghyll-24-september - A two thousand dollar phone — charlesharri.es (Sep 2026) https://charlesharri.es/stream/a-two-thousand-dollar-phone - Haughtongreen work party — charlesharri.es (Sep 2026) https://charlesharri.es/stream/haughtongreen-work-party - Friction — charlesharri.es (Aug 2026) https://charlesharri.es/stream/friction - Night — charlesharri.es (Jul 2026) https://charlesharri.es/stream/night - Yellow summer — charlesharri.es (Jul 2026) https://charlesharri.es/stream/yellow-summer - What You Are Looking For Is in the Library — charlesharri.es (Jul 2026) https://charlesharri.es/books/what-you-are-looking-for-is-in-the-library - Ely — charlesharri.es (Jul 2026) https://charlesharri.es/stream/ely - Evening, Cumbria — charlesharri.es (Jun 2026) https://charlesharri.es/stream/evening-cumbria - Hot weather — charlesharri.es (Jun 2026) https://charlesharri.es/stream/hot-weather-2 - Doggerland — charlesharri.es (Jun 2026) https://charlesharri.es/books/doggerland - Summer — charlesharri.es (Jun 2026) https://charlesharri.es/stream/summer - Walking Ghyll, 5 June — charlesharri.es (Jun 2026) https://charlesharri.es/stream/walking-ghyll-5-june - Walking Ghyll, 3 June — charlesharri.es (Jun 2026) https://charlesharri.es/stream/walking-ghyll-3-june - Walking Ghyll, 31 May — charlesharri.es (May 2026) https://charlesharri.es/stream/walking-ghyll-31-may - Walking Ghyll, 28 May — charlesharri.es (May 2026) https://charlesharri.es/stream/walking-ghyll-28-may - Walking Ghyll, 24 May — charlesharri.es (May 2026) https://charlesharri.es/stream/walking-ghyll-24-may - The 62nd Fellsman — charlesharri.es (May 2026) https://charlesharri.es/blog/the-62nd-fellsman - A Storm of Swords — charlesharri.es (May 2026) https://charlesharri.es/books/a-storm-of-swords - Ghosts — charlesharri.es (Apr 2026) https://charlesharri.es/stream/ghosts - Slouching Towards Utopia — charlesharri.es (Apr 2026) https://charlesharri.es/books/slouching-towards-utopia - Yesteryear — charlesharri.es (Apr 2026) https://charlesharri.es/books/yesteryear - Claude Code for fell running — charlesharri.es (Apr 2026) https://charlesharri.es/stream/claude-code-for-fell-running - On completing half of the Wainwrights — charlesharri.es (Apr 2026) https://charlesharri.es/stream/on-completing-half-of-the-wainwrights - Thoughts on slowing the fuck down - Mario Zechner — charlesharri.es (Mar 2026) https://charlesharri.es/stream/thoughts-on-slowing-the-fuck-down-mario-zechner - The code agent orchestra - Addi Osmani — charlesharri.es (Mar 2026) https://charlesharri.es/stream/the-code-agent-orchestra-addi-osmani - Wuthering Heights — charlesharri.es (Mar 2026) https://charlesharri.es/books/wuthering-heights - Krystal - FFSR — charlesharri.es (Mar 2026) https://charlesharri.es/stream/krystal-ffsr - North Lakes Wainwright bagging — charlesharri.es (Feb 2026) https://charlesharri.es/stream/north-lakes-wainwright-bagging - Cognitive debt — charlesharri.es (Feb 2026) https://charlesharri.es/stream/cognitive-debt - Now: Rubbish — charlesharri.es (Feb 2026) https://charlesharri.es/stream/now-rubbish - How to read and write application logs — charlesharri.es (Feb 2026) https://charlesharri.es/stream/how-to-read-and-write-logs - Now — charlesharri.es (Feb 2026) https://charlesharri.es/stream/now-2026-02-03 - AI lowers the effort barrier — charlesharri.es (Jan 2026) https://charlesharri.es/stream/ai-lowers-the-effort-barrier - Karpathy on Claude Code — charlesharri.es (Jan 2026) https://charlesharri.es/stream/karpathy-on-claude-code - Now — charlesharri.es (Jan 2026) https://charlesharri.es/stream/now-2026-01-27 - Now — charlesharri.es (Jan 2026) https://charlesharri.es/stream/now-20260118 - Default apps, 2026 — charlesharri.es (Jan 2026) https://charlesharri.es/stream/default-apps-2026 - Now — charlesharri.es (Jan 2026) https://charlesharri.es/stream/now-20250111 - Now — charlesharri.es (Jan 2026) https://charlesharri.es/stream/now-2 - TV & film at the end of the year — charlesharri.es (Jan 2026) https://charlesharri.es/stream/tv-film-at-the-end-of-the-year - 2025 — charlesharri.es (Dec 2025) https://charlesharri.es/blog/2025 - The Rose Field — charlesharri.es (Dec 2025) https://charlesharri.es/books/the-rose-field - Simonside Cairns fell race — charlesharri.es (Dec 2025) https://charlesharri.es/stream/simonside-cairns-fell-race - Not Boring !Camera — charlesharri.es (Dec 2025) https://charlesharri.es/stream/not-boring-camera - App switching — charlesharri.es (Dec 2025) https://charlesharri.es/stream/app-switching - Somewhere to go to do one thing — charlesharri.es (Dec 2025) https://charlesharri.es/stream/somewhere-to-go-to-do-one-thing - La Belle Sauvage — charlesharri.es (Nov 2025) https://charlesharri.es/books/la-belle-sauvage - Cruel Little Man — charlesharri.es (Nov 2025) https://charlesharri.es/stream/cruel-little-man - Bad AI art — charlesharri.es (Oct 2025) https://charlesharri.es/stream/bad-ai-art - Uniqlo — charlesharri.es (Oct 2025) https://charlesharri.es/stream/uniqlo - Jasmine Sun: are you high-agency — charlesharri.es (Sep 2025) https://charlesharri.es/stream/high-agency - Dan Abramov: Open Social — charlesharri.es (Sep 2025) https://charlesharri.es/stream/dan-abramov-open-social - John Ganz: Reflections on Violence — charlesharri.es (Sep 2025) https://charlesharri.es/stream/john-ganz-reflections-on-violence - A couple of things to remember when Something Bad is in the news — charlesharri.es (Sep 2025) https://charlesharri.es/stream/a-couple-of-things-to-remember-when-something-bad-is-in-the-news - Yield points — charlesharri.es (Sep 2025) https://charlesharri.es/stream/yield-points - A youtube video about doing something meaningful — charlesharri.es (Sep 2025) https://charlesharri.es/stream/a-youtube-video-about-doing-something-meaningful - More Programming Thoughtleadership re: dependencies — charlesharri.es (Aug 2025) https://charlesharri.es/stream/programming-thoughtleadership - Good system design — charlesharri.es (Aug 2025) https://charlesharri.es/stream/good-system-design - A Game of Thrones — charlesharri.es (Aug 2025) https://charlesharri.es/books/a-game-of-thrones - Picking on third-party deps — charlesharri.es (Aug 2025) https://charlesharri.es/stream/i-implore-you-to-reconsider - Collaborative mapping — charlesharri.es (Aug 2025) https://charlesharri.es/stream/collaborative-mapping - The Director — charlesharri.es (Aug 2025) https://charlesharri.es/books/the-director - Ghost CMS — charlesharri.es (Aug 2025) https://charlesharri.es/stream/ghost-cms - I need jungle I'm afraid — charlesharri.es (Aug 2025) https://charlesharri.es/stream/i-need-jungle-im-afraid - Careless People — charlesharri.es (Jul 2025) https://charlesharri.es/books/careless-people - Skittles — charlesharri.es (Jul 2025) https://charlesharri.es/stream/skittles - Poem/1 — charlesharri.es (Jul 2025) https://charlesharri.es/stream/poem-1 - Maurice and Maralyn — charlesharri.es (Jul 2025) https://charlesharri.es/books/maurice-and-maralyn - London: Houses of Parliament — charlesharri.es (Jul 2025) https://charlesharri.es/stream/london-houses-of-parliament - C2A: Amsterdam, finally — charlesharri.es (Jun 2025) https://charlesharri.es/stream/c2a-amsterdam-finally - Tinkers — charlesharri.es (Jun 2025) https://charlesharri.es/books/tinkers - The Yearling — charlesharri.es (Jun 2025) https://charlesharri.es/books/the-yearling - C2A: Into the Real Netherlands — charlesharri.es (Jun 2025) https://charlesharri.es/stream/the-real-netherlands - C2A: Into the Netherlands — charlesharri.es (Jun 2025) https://charlesharri.es/stream/c2a-into-the-netherlands - C2A: Ghent and environs — charlesharri.es (Jun 2025) https://charlesharri.es/stream/c2a-ghent-and-environs - C2A: The road to Bruges — charlesharri.es (Jun 2025) https://charlesharri.es/stream/c2a-the-road-to-bruges - C2A: Into Belgium — charlesharri.es (Jun 2025) https://charlesharri.es/stream/c2a-into-belgium - C2A: Dover — charlesharri.es (Jun 2025) https://charlesharri.es/stream/c2a-dover - C2A: Leaving Hartlepool — charlesharri.es (Jun 2025) https://charlesharri.es/stream/c2a-leaving-hartlepool - Blogs not about anything — charlesharri.es (Jun 2025) https://charlesharri.es/stream/blogs-not-about-anything - David's Bob Graham — charlesharri.es (Jun 2025) https://charlesharri.es/stream/davids-bob-graham - Swaledale Marathon — charlesharri.es (Jun 2025) https://charlesharri.es/stream/swaledale-marathon - Project Hail Mary — charlesharri.es (Jun 2025) https://charlesharri.es/books/project-hail-mary - A Pennine Journey — charlesharri.es (Jun 2025) https://charlesharri.es/books/a-pennine-journey - A.W. on anticipation — charlesharri.es (Jun 2025) https://charlesharri.es/stream/a-w-on-anticipation - Dia browser — charlesharri.es (Jun 2025) https://charlesharri.es/stream/dia-browser - Some art I like — charlesharri.es (Jun 2025) https://charlesharri.es/stream/some-art-i-like - Slam of the North — charlesharri.es (May 2025) https://charlesharri.es/stream/slam-of-the-north - Andor, season 2 (2025) — charlesharri.es (May 2025) https://charlesharri.es/stream/andor-season-2 - Bob Graham Round, leg 4 clockwise — charlesharri.es (May 2025) https://charlesharri.es/stream/bob-graham-round-leg-4-clockwise - Neptune relays — charlesharri.es (May 2025) https://charlesharri.es/stream/neptune-relays - Macbeth (1623, 2025) — charlesharri.es (Apr 2025) https://charlesharri.es/stream/macbeth-1623-2025 - Kagemusha (1980) — charlesharri.es (Apr 2025) https://charlesharri.es/stream/kagemusha-1980 - Boston Marathon — charlesharri.es (Apr 2025) https://charlesharri.es/stream/boston-marathon - Chernobyl (2019) — charlesharri.es (Apr 2025) https://charlesharri.es/stream/chernobyl-2019 - Replacing an oxygen sensor — charlesharri.es (Apr 2025) https://charlesharri.es/stream/replacing-an-oxygen-sensor - Jonathan Strange & Mr Norrell - on TV! — charlesharri.es (Mar 2025) https://charlesharri.es/stream/jonathan-strange-mr-norrell-on-tv - Megalithic Portal — charlesharri.es (Mar 2025) https://charlesharri.es/stream/megalithic-portal - How to be Perfect — charlesharri.es (Mar 2025) https://charlesharri.es/books/how-to-be-perfect ## Skills ### Technical - AWS - Python ### Security - Splunk ## Education - **McGill University** — Bachelor of Arts, English Literature (Aug 2008 - Jun 2012) ## Languages - French (professional working) - Japanese (limited working)