Voytek Pitula
@krever01.bsky.social
Staff Engineer at @SwissBorg • Crapposter • Occasional conference speaker • Libertarian paternalist • #Scala developer • Books addict • Building https://business4s.org
Business4s H1 2026 recap is out. A lot of interesting stuff happened and even more interesting ideas are taking shape! medium.com/business4s-b...
Business4s H1 2026 Highlights
Another six months behind us, and the Business4s ecosystem keeps growing — quietly, but steadily, as usual. Two releases of Workflows4s, a…
medium.com
June's reading batch is done — 8 books. The Wandering Inn keeps delivering with Couriers Outbound (4/4), Primal Hunter 14 (4/4) stays strong, and The Programmer's Brain (2/4) proved you can write a whole correct book that's almost completely useless. medium.com/vp-of-books/...
Batched Books Reviews #2026.6
Non-fiction
medium.com
I just published Fintech Engineering Handbook distilled from 6 years of tears, sweat and swears. It’s a free ~25-page resource with various hints and patterns around handling money. Tell me what you think! w.pitula.me/fintech-engi...
Fintech Engineering Handbook
w.pitula.me
Psst, there might be a free slot or two at the current round of mentorship program. Just saying. business4s.org/mentorship/
Intro | Business4s
Welcome to the Scala Mentorship Program! This initiative is free, open to engineers of all levels, and part of the
business4s.org
I wrote my longest article ever. I hope it was worth the effort. medium.com/@w.pitula/sc...
Scala’s Growth Model — Building Inward, Starving Outward
TLDR: Scala’s community energy concentrates on language internals and libraries that only Scala developers can appreciate — work that is…
medium.com
New batch of book reviews. One extraordinary one on critical thinking. medium.com/vp-of-books/...
Batched Books Reviews #2026.3
Non-fiction
medium.com
I'm just gonna just leave it here. I somehow feel it will spread without much marketing. medium.com/@w.pitula/ra...
Rage Against the (Plurality of) Effect Systems
TL;DR: Effect systems are great. Having five of them is not. Each alternative brings real improvements, but none clears the bar that would…
medium.com
My current take on how close Claude is to my expected/desired code on different levels: Method bodies: 95% Methods split: 80% Class split: 65% Inter-service architecture: 50% Still a long way to go but I barely modify anything on expression/method level
Not the most impressive but complete enough. I need a new thing to waste my time on. Is Dave The Diver good?
I start to think I need to step up my public-speaking game. Or write better abstracts 😅
In 20 minutes I will talk about Business4s at Func Prog Sweden online Meetup! www.youtube.com/live/rFa4Jhg...
Second Online Func Prog Sweden 2026
YouTube video by Func Prog Sweden
youtube.com
I'm looking into Zulip and it seems much more serious and better suited for collaboration than Discord. Why isn't it more popular among OSS communities?
Published first batch of reviews from 2026. Mostly fiction, but good ones! medium.com/@w.pitula/ba...
Batched Books Reviews #2026.1
Non-fiction
medium.com
New Claude usage Hit compiler bug > ask to minimize > ask to search GitHub for related issue. It found one and a workaround.
New day, new article. I've been going full-throttle on agentic software development for the last 2 months and summed up my thoughts. medium.com/@w.pitula/tw...
Two Months of Vibe-Coding: Scala, Constraints, Trust and Shipping
I’ve been programming for almost 15 years now, last 5 on mission-critical software in the finance domain. I know the stakes, tradeoffs and…
medium.com
Just got my ticket to @scalar-conf.com. Not speaking this time, but the lineup was too good to miss it.
Check out the new Forms4s library by @krever01.bsky.social. It ships with Tyrian 👾 support out of the box, but because it's composable, you aren't locked into a specific UI framework. medium.com/business4s-b...
Forms4s: Rapid (Internal) UI Development
Scala.js is genuinely great. It lets backend developers build web applications using the same language, type system, and mental models they…
medium.com
The Sovereign Tech Fund Invests in Scala: 🔐 security audits 🔧 sbt 2.0 📚 core library maintenance 💪 and long-term resilience for critical digital infrastructure Check out the announcement: www.scala-lang.org/b... 🙏 Huge thanks to @sovereign.tech
New library in Business4s ecosystem! And my semi-rant on scala.js usability. medium.com/business4s-b...
Forms4s: Rapid (Internal) UI Development
Scala.js is genuinely great. It lets backend developers build web applications using the same language, type system, and mental models they…
medium.com
Decisions4s just got support for persistence. I'm still not convinced its a good way to handle business logic, but many people asked if thats possible. Now it is. business4s.org/decisions4s/...
Persistence | Decisions4s
Decisions4s supports loading decision tables from external sources using expression languages. This allows storing decision logic in databases, configuration files, or receiving them from external ser...
business4s.org
Wild observation: feedback is now more valuable for OSS projects than contributions. I can steer Claude at least just as effectively as avg contributor but I can get real world usage report out of it.
Current status: optimized an operational job from 33 hours to 22 minutes :)
Check out what we’ve been up to over the past 6 months 🙂 medium.com/business4s-b...
Business4s H2 2025 Highlights
Six more months of building practical Scala for real business problems
medium.com
I posted the last batch of my books reviews from 2025. Double sized (20 positions) because I was lazy. One great book about investment, and a lot of other good ones. medium.com/vp-of-books/...
Batched Books Reviews #2025.10
Non-fiction
medium.com
Hey @kitlangton.bsky.social does neotype require runtime dependency? @baldram.github.io pointed me to it, and I see it doesn't allocate, but I'm curious if it requires any symbols at runtime at all. I'm asking because if not I could safely use it in my libs without binary compatibility issues.
