Most languages let you pattern-match on what data IS. #FSharp lets you pattern-match on what data MEANS. Active Patterns reshape data so you can match on business concepts instead of raw structure. And they compose. 🔗 rdeneau.gitbook.io/safe-clean-a... #DotNet #PatternMatching #FuncProg

Anyone I know going to @dddsouthwest.com in Bristol 16th May?

The wait is over! Fable 5 Release Candidate is officially here. After a year of hard work from the community, we're bringing you: ✨ .NET 10 & F# 10 support 🐍 A massive Python update (now powered by a Rust core & PyPI!) 🌐 Cleaner JS/TS Pojo bindings fable.io/blog/2026/20... #fsharp #fablecompiler

DDD events are fantastic and DDD South West is especially so because Bristol is a delightful city - and their CFP is open, so get those talks in now and hopefully see you in Bristol in May!

I'm pretty much defaulting to F# for my domain code nowadays, C# is still less friction for infra, but once you get used to the ergonomics of F# to describe business rules, it's difficult to go back.

Yes, quite. It's the biggest scandal of this administration, so far, probably. It's an average Tuesday under Johnson.

I wonder... would there be any interest in some F# event / (un)conference in 2026? I always wanted to do something similar to F# Creators Workshop (which @dsyme.bsky.social organised years ago in Cambridge) or Elm Camp (which has been for last couple of years) #fsharp

Happy New Year! Rewatch our #VDDD session with Thomas Ploch on "What is an Aggregate?". It sparked a great dialogue on this core DDD pattern. Clear up perceptions & learn how to teach it. Watch on our site: buff.ly/Zwatr5x Or listen as a podcast.

My new little side project is now live: living-architecture.dev Basically: extracting software architecture from code and visualizing it. Demo: living-architecture.dev/eclair/?demo... Currently there is a library, CLI, schema, and web app. 100% open source on github: github.com/NTCoding/liv...

"F# Advent Calendar in English 2025" is complete and all slots are filled 🎉 #fsharp #fsadvent sergeytihon.com/2025/11/03/f...

#EU vs US in a nutshell

Here’s my post for Day 8: blog.bencope.land/f-in-product... #fsharp

💡 "We listen to what the business wants and translate that into quality software" If you describe DDD to someone outside of software development, they might assume all software is designed this way, but in reality, it's not!

Been working with Typescript, Hono, Zod, and friends for the last couple of months. It was "interesting" but not particularly "enjoyable". I'm not the target audience for a language like Typescript - I'm too demanding and get frustrated really fast dealing with its shenanigans.

published medium.com/@tonyx1/f-do... #fsharp #csharp #eventsourcing #entityframework

Hey #fsharp, what we do with #FsAdvent this year? sergeytihon.com/fsadvent/ Do we have 24 F#ers ready to participate?

The quote "All models are wrong but some are useful" should not be read as an excuse to stick with your model. It's a call to actively search for more useful models.

We'll know 'gold standard' apprenticeships really are 'gold standard' when politicians think their own kids should do them rather than getting a degree.

I saw Hillsborough for the first time in over 25 years, plus Bramall Lane, during my visit to see friends in Sheffield today. I still have mixed emotions about my seven years living in the city in the 90s.

England nationalized rail passenger services lease carriages from rolling stock companies (ROSCOs). 87% of rolling stock controlled by 3 Luxembourg companies. Paid £1.282bn dividends in last 3 yrs. Not taxed in UK. Privatization has hollowed out the UK - Taxes lost, it is all about exploitation.

Excited to say that we're looking to hire someone to focus on OxCaml education! We're doing enough to change the language that we have a pretty big internal education task ahead of us, and we want to hire someone to focus on it! Please share this with others! www.janestreet.com/join-jane-st...

We’re moving our main home for events from Meetup to Humanitix. Follow us on Humanitix (Our new home for events): buff.ly/BybdgFk #VirtualDDD #DomainDrivenDesign #Community #Humanitix #TechForGood

Developers: Stop Trying to Be Correct, Embrace the Chaos! with Barry O'Reilly @technologytulip.bsky.social Full episode: software-architektur.tv/2025/09/19/e... Barry at @sagconference.bsky.social conferences.isaqb.org/software-arc...

We are looking for developers for a stealth startup in Stockholm is hiring a .NET/F# dev! Focus: Functional Programming, GIS, AI/LLMs, Google Cloud. Hybrid (3 days onsite). Open to consultants & FTEs. 👉 DM me for details

TODAY 13:00 CEST Residuality Theory with Barry O’Reilly More information and possibility for questions: software-architektur... #SoftwareArchitektur im #Stream

TOMORROW 13:00 CEST Residuality Theory with Barry O’Reilly More information and possibility for questions: software-architektur... #SoftwareArchitektur im #Stream

No, Your Domains and Bounded Contexts Don’t Map 1 on 1. It sounds clean and logical, but it’s wrong. Read about it in my latest article: verraes.net/2025/08/doma...

In fact, most of the ire you see against "object orientated code" is just ire against procedural code disguised as OO-code. And of course, yes, that stuff is bad.

I suspect this is gonna open up a whole new dimension of resilience that we’ve been avoiding so far (Also: the balkanization of the internet looks more and more likely by the day…)

Yeah it is! #pusb

Remember 100,000 of us protested for trans rights in London 4 wks ago We get more ppl every other week for Palestine solidarity in Cardiff than the fash had at Rhws. There'll be more ppl at Trans Pride Cymru today But British "journalists" don't care about reporting our concerns. Just the racists'

Kind of fun to see straight forward, functional programming in #fsharp with Result types on every single event and @scottwlaschin.bsky.social style domain driven design process 8-9 million events pr minute on a 2-core 4GB RAM Azure Container App IRL.

Very interesting blog series from @paullouth.bsky.social on higher kinded types in C#. He's kinda (see what I did there) made an `M a` out of a `K<M, A>`. It actually comes out reasonably smooth (but agreed that it should be in the language). paullouth.com/higher-kinds...

Mind blowing

This is one of the best ideas I've heard in ages.

The problem with people that "vote for change" in politics is that change is uneven. Bad changes are easy to make, and positive change takes time and perseverance because good systemic change is hard. I'm sure there are counter examples, but it's why "brick through the window" politics sucks.

Why F#? batsov.com/articles/202... #fsharp

Normally you'd have to pay £££ for a conference ticket to get @rendle.dev and @davidwhitney.co.uk on the same programme. Or you can come along tomorrow night and see them both for free - our friends @accurx.bsky.social are even providing free drinks and snacks! www.meetup.com/london-net-u...

Learned this, the hard way, a few years back 😅 blog.codingmilitia.com/2022/09/01/b...

For me, one of the best definitions of Test-Driven Development comes from the paper "Mock Roles, Not Objects" by Steve Freeman, Nat Pryce, Tim Mackinnon, Joe Walnes. http://jmock.org/oopsla2004.pdf #tdd #unittests #softwaredesign

This periodically makes it back to my feed/social circles and it gets me every time.

This country has hosepipe bans to stop people watering gardens but you run an unregulated data centre you’re golden.

Whatever the reason for the big drop in entry-level hiring (I don't buy the "AI" narrative, sorry), it's weapons-grade short-termism. Employers will have earned the future skills/experience drought they're creating.

AI won't replace you. An executive who doesn't understand AI or your job will.

Just a quick note to say that I'm currently looking for work. Either Node/Typescript or .NET/C#. Happy to consider contract or perm, but must be remote. Thanks all! RT appreciated 🙏

China's high speed train from Beijing to Shanghai is a journey of over 800 miles, 200 miles further than from Land's End to John o'Groats. It covers that vast distance in a little over 4 hours. It was built in 3 years, between April 2008 and June 2011. Puts HS2 into context, don't you think?

Nothing beats getting your devs to see the whites of your customers' eyes. Recognise there are real people at the other end of what you're building. Don’t complain devs aren’t commercially minded or outcome focused when they’re three layers away and communicated to through decks or Jira tickets.