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James Jarvis

@jamesjarvis.io
27 followers 143 following 34 posts

Thoughts are my own jamesjarvis.io

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Reposted by James Jarvis
Adrian Hiel @adrianhiel.bsky.social · 30/10/2025
"Make electricity cheaper" helps solve pretty much all of Europe's main challenges. The cheaper it gets, the faster we go. Read this (and the other two papers) from @regassistproj.bsky.social who are knocking it out of the park.
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Kristian Glass @doismellburning.bsky.social · 23/10/2025
At @incident.io SEV0 watching @lawrencejones.dev show some of the internals of their AI SRE The product itself looks absolutely fantastic and incredibly powerful But the other thing that is a joy to see is the sheer quality of internal tooling they’ve built to learn and improve and monitor 😍
Photo of Lawrence on stage in front of a large slide showing an internal dashboard timing trace of a multi-agent AI run
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James Jarvis @jamesjarvis.io · 16/10/2025
It’s critically important to enjoy your work. If you don’t? Find the enjoying work outside of your primary employment.
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James Jarvis @jamesjarvis.io · 15/10/2025
Watching the AI race atm. New tech -> early adopters -> gold rush -> commodification-> consolidation. We are exiting gold rush and entering commodification, will be interesting to see how the consolidation happens.
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James Jarvis @jamesjarvis.io · 15/10/2025
Is Penfold (the pension provider) having some technical difficulties? Not sure they are processing payments correctly.
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James Jarvis @jamesjarvis.io · 05/06/2025
I recently joined a new company, and my second week was for an offsite to Greece! Surprisingly, not as corporate as I had feared, and giving me huge optimism for the future. This is the right decision to have made. LFG 🚀
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James Jarvis @jamesjarvis.io · 20/05/2025
Reading “from third world to first” by Lee Kuan Yew. All I can think about is what if the UK and broader western world adopted more of these policies? (Notably the mandatory pension savings, healthcare contribution, home ownership schemes, lowering taxes as a result)
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Octopus Energy @octopus.energy · 19/05/2025
British businesses are closing due to high electricity bills. Zonal electricity pricing would lower everyone's bills. Hear why business owners need change:
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Martin Lewis @martinlewis.moneysavingexpert.com · 19/05/2025
When did journalism change? When I did my journalism postgrad, we were taught to ensure the opening sentence summarised the key info. Today's online 'news' writers must've been taught to ‘hide the key info until paragraph 14!' so people must tediously scroll through copious ads
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James Jarvis @jamesjarvis.io · 11/05/2025
Follow me on my trip ‘China and South Korea 2025’ at www.polarsteps.com/JamesJarvis/...
polarsteps.com
Polarsteps
Polarsteps is the personal travel log in your pocket.
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James Jarvis @jamesjarvis.io · 08/05/2025
Just handed in my laptop and badge on my last day at Thought Machine. Had a wonderful time with talented colleagues, but excited for the next chapter!
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James Jarvis @jamesjarvis.io · 24/04/2025
This whole time, I thought I liked working at startups, but also this whole time, I’ve actually only worked at scale ups… Why do startups pay such low salaries? Unironically isn’t that what VC funding is for?
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David Roberts @volts.wtf · 25/03/2025
The most obvious lesson to draw from the leaked Signal chat is that these people really are morons. It's not a public act, it's not a schtick, there's not some secret back room where they drop the facade. They are genuinely stupid, incompetent people.
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James Jarvis @jamesjarvis.io · 23/03/2025
Went to a policy summit last night hosted by lookingforgrowth.uk Brilliant event with some of the most ambitious and optimistic change-ready participants I’ve met! LFG 🚀
lookingforgrowth.uk
Looking For Growth
We're Looking For Growth. Join us to be part of a force that Westminster can't ignore.
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Octopus Energy @octopus.energy · 05/03/2025
In 2025, GB billpayers have spent £250 million switching off renewable generators while switching on gas plants. We’re wasting wind energy when we should be making it cheaper instead. Locational pricing would massively reduce waste and lower bills.
Article from The Times reads "The cost to consumers of dealing with cabling bottlenecks on Britain’s electricity network has risen by 60 per cent to more than £250 million in the first two months of the year as wind farms were paid to switch off and gas plants paid to replace them.

The rapid expansion of offshore wind farms to tackle climate change has resulted in turbines being built before Britain’s transmission networks have been upgraded to carry all the power that they generate on windy days."
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James Jarvis @jamesjarvis.io · 18/02/2025
If anyone hasn’t heard about Gary yet, I’d highly recommend checking out some of his videos, as they offer the closest thing to a clear explanation of the state and projection of the economy I’ve seen. Wondering why you can’t afford a house? Wealth inequality #economics #WealthInequality
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Jan Rosenow @janrosenow.bsky.social · 09/02/2025
A big contrast: From 2006 to 2023, China's nuclear energy production surged by 690%, rising from 55 TWh to 435 TWh. Meanwhile, Germany's nuclear output plummeted from 167 TWh to zero, making it the only major economy to fully phase out nuclear power.
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James Jarvis @jamesjarvis.io · 09/02/2025
About a quarter of the way through installing our new kitchen from @diykitchens.bsky.social Ngl it’s a little bit nerve wracking but we think it’s going good so far, if a little slow! #diy #kitchen #herringbone
A kitchen installation in progress, with herringbone flooring and blue cabinets
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James Jarvis @jamesjarvis.io · 07/02/2025
Strange thought: shouldn’t a society have the ability to easily and cheaply demolish any ungainly or negative value structures? Or at least as easily as it can create them?
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James Jarvis @jamesjarvis.io · 07/02/2025
The UK government is going to mandate all rental properties be an EPC C or above by 2030. Honestly this feels too little, too late? For the properties that cannot be reasonably upgraded, I believe demolition should be an option! www.gov.uk/government/n...
gov.uk
Warm homes and cheaper bills as government accelerates Plan for Change
Households across the country are set to benefit from cheaper bills and warmer homes as the government accelerates its Plan for Change.
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James Jarvis @jamesjarvis.io · 07/02/2025
A few years ago I made a little device that displayed random quotes on a nice paper like display. I promptly lost that device and all record of it, so I made another. This is how you can make one too! #eink #badger2040 #pimoroni #electronics #diy jamesjarvis.io/posts/2025/0...
jamesjarvis.io
Secret Santa: A Quote-a-day E-Ink display
This is the story of how I built (and how you can build) a cute little display that shows you a new famous quote every day.
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James Jarvis @jamesjarvis.io · 03/02/2025
Spent the last week working remotely in Paris. Comparing it to London a lot! Pros: - Beautiful architecture/public spaces - Rent control keeps the centre interesting - Good cycling infrastructure Cons: - LVMH own the city - Small apartments - Few coworking cafes in the centre
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Lewis Goodall @lewisgoodall.com · 02/02/2025
Charing Cross Road, pedestrianised today. Glorious. Because whenever you take cars away, cities get better.
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Lewis Baston @lewisbaston.bsky.social · 31/01/2025
You don’t see a 0% very often in polling - Brexit’s appeal, always narrow, has not expanded an inch (or a centimetre). And people who supported it at the time are mostly of the view that it made no difference. Few major political projects have failed so abjectly to become a settled consensus…
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Nassos Stylianou @nassosstylianou.bsky.social · 23/01/2025
NEW: Petrol cars are on the way out. Are you ready to go electric? By 2030 the UK government wants 80% of new cars to be EVs. In our latest visual story, we built the perfect EV town and set out the changes needed to accelerate the transition ig.ft.com/uk-electric-...
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James Jarvis @jamesjarvis.io · 24/01/2025
If you see this post, quote with a bridge from your gallery.
A wooden bridge in Mount Rainier National Park, USA
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James Jarvis @jamesjarvis.io · 23/01/2025
I set a goal last year to review every book I read. Some reviews are useful, most are my ramblings. This year I read 20 books jamesjarvis.io/posts/2025/0...
jamesjarvis.io
📚 Year of books 2024
2024 I read a bit less
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James Jarvis @jamesjarvis.io · 07/01/2025
Well, this was my most recent project around the house: reflooring the whole downstairs in glue down engineered oak herringbone! Turned out quite well all things considered, but only half way there so far.
Oak Herringbone Flooring close up
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Benjamin Riley @benjaminjriley.bsky.social · 06/01/2025
I mostly steer clear of OpenAI palace intrigue but man, all the signs are there. High flying VC darling. CEO with known ethical issues (ask former board member Helen Toner). Predictions about the future that continue to spiral in their grandiosity (see Altman blog post yesterday).
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Jacqs @fooyoo2.bsky.social · 04/01/2025
It’s just as dumb as it looks
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Brent Toderian @brenttoderian.bsky.social · 23/12/2024
15 years old, but still completely relevent — and if we had acted 15 years ago, the “better world” we could be creating today would be a LOT better and easier to reach. There are real consequences we’re just starting to see to not heeding this cartoon a lot sooner. Heed it now. #ClimateCrisis
At Climate Summit, presenter has long list of advantages to making more sustainable choices and addressing #ClimateChange. Audience member asks “what if it’s a big hoax and we create a better world for nothing?”
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James Jarvis @jamesjarvis.io · 10/12/2024
Testing out a theory that microservices with a shared storage layer, are just a bit wasteful compared to a reasonably scalable monolith.
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James Jarvis @jamesjarvis.io · 08/12/2024
Been trying out some writing! Check out my latest post on a basic introduction to authorisation, with some example code in Golang. Note: I was paid by Permit to write this, I'm exploring writing as a side-gig. #Golang #RBAC #Authorisation #Permit.io jamesjarvis.io/posts/2024/1...
jamesjarvis.io
Role Based Access Control (RBAC) Authorisation in Golang with Permit.io
What is ‘Authorisation’, and how to implement a working solution with Permit.io
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Darth Putin @darthputinkgb.bsky.social · 08/12/2024
So basically, every Russian I sent to die in Syria died for nothing. I remain a master strategist.
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James Jarvis @jamesjarvis.io · 02/12/2024
Flooring loading…
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James Jarvis @jamesjarvis.io · 30/11/2024
I love London, I love working in tech. Why does it seem that there are not enough good tech companies with their primary office in London? Does anybody have any suggestions?
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James Jarvis @jamesjarvis.io · 30/11/2024
So I spent absolutely ages trying to enable “contact key verification” on iMessage last night and, what does it do? The UI also seems a bit glitchy (for some reason it doesn’t show the person’s main phone number as verified)
Screenshot of Apple iMessage advanced message security section, showing a verified symbol next to a contacts name
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Mike Galsworthy @mikegalsworthy.bsky.social · 29/11/2024
“We must leave the EU to control our borders and stop mass immigration,” they said. And it was the same people who said that who were then in government. Brexit has simply led to the reverse of everything it said it was about.
Graph of EU and non-EU immigration into the UK over time. Title: “Non-EU net migration quintupled between 2019 and 2022”
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James Jarvis @jamesjarvis.io · 28/11/2024
How much do you reckon it’ll cost to go from old kitchen -> new kitchen in the UK in 2024?
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James Jarvis @jamesjarvis.io · 26/11/2024
Yesterday at work we were playing around with a “100B row challenge” (where you try and write 100B unique rows with ~10 columns to a cloud hosted Postgres database as quickly as possible). We achieved ~1M rows/s (roughly ~250MBit/s to disk). What’s the industry record? #100BRC #PostgreSQL
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James Jarvis @jamesjarvis.io · 25/11/2024
Wonder if there’s a #DIYSky on here to roast my flooring efforts? I’ve been laying new flooring around my house and for my first effort I stapled the engineered wood on top of a 5mm foam underlay. Turns out it creaks a bit! Perhaps it’s just a first time mistake, but I’m changing to fibre board!
Small room with a half finished oak flooring installation on top of a foam underlay
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James Jarvis @jamesjarvis.io · 25/11/2024
Turns out you can change your handle here! I’m now @jamesjarvis.io
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@levelsio @levels.io · 24/11/2024
Now more than ever
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James Jarvis @jamesjarvis.io · 19/11/2024
Not sure what to post on here - but check out my website for other ramblings around software engineering, economics, my 8+ year stint of recording a second a day, or my latest endeavour - home ownership! jamesjarvis.io/posts/2024/1...
jamesjarvis.io
🏡 On Buying a House
I have a bit of a confession to make. I am horribly, frustratingly, embarrassingly… indecisive.
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karpathy @karpathy.bsky.social · 06/05/2023
BlueSky firehose in real time cool firesky.tv
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James Jarvis @jamesjarvis.io · 19/11/2024
How can I override the Postgres query planner without some inane plugin? It’s super useful as you scale a schema but after a certain point it just gets in your way / nerfs itself at random. I just want a little stability, is that too much to ask?!
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James Jarvis @jamesjarvis.io · 18/11/2024
Naughty confession: Every time I see our cloud bill at work I invest a little bit more into the big cloud companies…
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