Curious engineer digging large-scale legacy Rails apps. @RailsEventStore core and former leader. Organizing @drugpl and @wrocloverb conference.

Wrocław, PL
Paweł Pacana retweeted
I'm happy to see that my appearance in @wrocloverb had some lasting impact: skatkov.com/posts/2026-07-01…
1
3
9
375
Paweł Pacana retweeted
That’s a wrap on wroclove.rb 2026! What we’ll remember most are the smiles, great discussions, and afterparty vibes. That energy keeps us going – sending a heartfelt thank you to everyone who joined us 🫶 May this postcard bring you all warm memories of wroclove.rb 2026!
7
17
2,002
Paweł Pacana retweeted
wroclove.rb kicks off tomorrow! Brace yourselves for a weekend of inspiring talks, fresh ideas, and great energy 🔥 Quick reminders for Day 1: • Registration → 13:00 • Workshops → 14:00 • Talks → 17:00 • Afterparty → 20:00 🍻 See you soon!
5
15
607
I've been exploring Dynamic Consistency Boundary support in RailsEventStore, strongly believing the groundwork was already there: mostlyobvio.us/2026/04/dynam…
1
1
133
In this article I walk through a working proof of concept: a single-file implementation using Postgres SERIALIZABLE isolation to guarantee correctness under concurrent writes. No schema changes required.
1
55
The conclusion is that DCB support in RailsEventStore is well within reach. The main challenge for an official release would be introducing new APIs without breaking the existing stream-based approach that many production apps rely on.
48
Paweł Pacana retweeted
"...it would be a shame to think of it simply as time to rest-up for more work. Sadly, this is the mindset for many us caught up in a world of pressure, productivity, and, well... more, More, MORE! We've got it wrong if we think of vacations (or even weekends) as a way to recharge for work. To put it another way, we shouldn't be resting so we can work. Work is necessary. Work is important. Meaningful even. Being effective at work matters. But we work so that we may rest. Rest is where the most important things live: families, friends, hobbies, play. The things that feed our souls. Fill yourself with those things and, somehow, you'll also be better at work." world.hey.com/jz/sabbaticals…
5
16
1,568
Paweł Pacana retweeted
Stoked to be showing geneva_drive at Wroclove.rb in April! It's going to be fun (and highly durable too).
5
2
5
239
Paweł Pacana retweeted
And it's live: ptrchm.com/actionbar/ ✅ GitHub Actions in your macOS menu bar.
Always wanted this simple app, but couldn't find it. A menu bar app that shows @github Actions runs with their statuses. Now it exists.
2
2
8
2,712
We design everything on web mobile-first… except code samples. Here’s a look at three approaches: clever, boring and something in between. A tour of Ruby on WebAssembly, Hotwire with Turbo Frames and something @maciejkorsan would be proud of. mostlyobvio.us/2026/02/respo…
1
3
726
Paweł Pacana retweeted
You already know @_m_b_j_ from his mutation testing workshop that he will run at #wrocloverb. And now he’s stepping on stage as a speaker too 🎤 Markus will give a talk titled “My core skill never was the typing” - expect sharp insights and plenty of food for thought.
1
2
3
414
Blogged
Stop using DateTime in 2026 (unless you work for UNESCO) blog.arkency.com/stop-using-…
1
4
443
Paweł Pacana retweeted
Ready to get hands-on with mutation testing? @_m_b_j_ joins us to run a "Setup and operation of mutation testing in agentic world" workshop. As the author of Mutant, a mutation testing tool for Ruby, there’s no better person to guide you through it 🔥 Gonna be a good one!
4
6
383
Paweł Pacana retweeted
Have you noticed how great the Ruby docs looks like for the master? docs.ruby-lang.org/en/master… Thank you @_st0012 and the entire team contributing to RDoc for these improvements.
3
5
43
2,733
Do I know someone who knows someone behind @papercall_io?
82
Paweł Pacana retweeted
The second batch of tickets is almost gone - we can't wait to see you all at #wrocloverb! 🤩 If you'd like to join us as a speaker, our CFP is still open and we're waiting to hear your ideas! Inspire your fellow developers, submit your talk here ➡️ papercall.io/wrocloverb2026
1
3
5
262
Paweł Pacana retweeted
Let's kick off the new week with exciting news - a new batch of tickets just dropped! 🥁 Don't miss your chance: grab your ticket and see you on April 17-19, 2026 at #wrocloverb ➡️ buytickets.at/wrocloverb/190…
2
6
9
1,209
That's a brilliant idea — reminds me of a versioned overlay filesystem for tracking changes to /etc backed by @MercurialScm that I did once at university
Would you let an AI agent run free on your filesystem? Most people wouldn't. That's why we're building overlay support for AgentFS: 📁Base layer: your repo, immutable 🔀Agent layer: isolated, copy-on-write sandbox The agent sees a real filesystem. Your files never change.
2
231