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Show HN: Reaktiv – I built Excel-like reactive programming for Python

https://bui.app/when-frontend-reactivity-meets-backend-python-the-story-of-my-first-1-000-download-library/
2•buibuibui•1y ago
Hi HN! I created Reaktiv, a Python library bringing reactive programming to the backend world that recently hit 1,000+ monthly downloads.

I'm actively promoting it because I believe signal-based reactivity (a concept that spread rapidly in frontend development) has huge untapped potential in Python. My breakthrough came when I stopped describing it as "Angular signals for Python" and started calling it "Excel-like computation graphs" - suddenly Python developers understood the value.

The library automatically tracks dependencies between computations, only recalculating values when dependencies change. This eliminates manual dependency tracking, prevents synchronization bugs, and reduces cognitive load when managing complex state.

Interestingly, I've noticed some initial interest from data scientists, though I'm still exploring what specific problems it might solve for them. I also believe the Home Assistant/IoT communities could benefit greatly from this approach.

Would love your thoughts on bringing frontend patterns to backend development!

Eight Days, Two Releases: Telepresence Removes Its Asterisks

https://telepresence.io/blog/telepresence-removes-its-asterisks
1•thallgren•1m ago•0 comments

The Wager: A Tale of Shipwreck, Mutiny and Murder

https://www.emgoto.com/books/the-wager/
1•surprisetalk•1m ago•0 comments

I researched every order-book attack and built the defenses into a Go engine

https://intrepidkarthi.github.io/orderbook/
1•intrepidkarthi•1m ago•0 comments

NetBSD 11 RC7

https://mail-index.netbsd.org/netbsd-announce/2026/07/23/msg000401.html
1•__patchbit__•2m ago•0 comments

Show HN: ScoutFox – An alert layer for first-mover intelligence

https://scoutfox.in
1•arvind_pcode•2m ago•0 comments

Europe Doesn't Have a Funding Problem

https://maximerumpler.substack.com/p/europe-doesnt-have-a-funding-problem
1•MaximeRumpler•3m ago•0 comments

Cloud Architect Assistant – compare clouds, generate Terraform

https://www.cloudarchitectassistant.com/
1•mahmoudifawzi•4m ago•1 comments

Schwartzian Transform

https://en.wikipedia.org/wiki/Schwartzian_transform
1•OptionX•4m ago•0 comments

Show HN: Governed Agent – the LLM reads the request, rules and code decide

https://github.com/war851/Governed-Agent
1•war851•5m ago•0 comments

Opus failed security alert triage on raw logs 9/9 times – until enriched

https://axoflow.com/white-paper/the-cost-of-a-correct-triage
1•frobert2•5m ago•0 comments

Starting Another Company

https://fullhoffman.com/2026/07/22/on-starting-another-company/
1•adunk•6m ago•0 comments

Ask HN: Is there any AI OS that has local AI and all are integrated to the OS?

1•wasimseikh•9m ago•0 comments

Prizewinning Solution of the LeHome Challenge

https://ilialarchenko.com/projects/lehome2026/
1•GaggiX•10m ago•0 comments

NInfer: 271 tok/s (543 with speculative) for Qwen3.6-35B-A3B on one RTX 5090

https://github.com/Neroued/ninfer
1•opwizardx•11m ago•0 comments

More Money, More Problems

https://www.carlyle.com/carlyle-compass/more-money-more-problems
1•RickJWagner•15m ago•0 comments

NextDemo – product videos that re-render when your app changes

https://nextdemo.app
1•tonyzvony•18m ago•0 comments

Show HN: I created a catalog with embeds for your projects

https://github.com/embedcatalog/embedcatalog
2•aanthonymax•18m ago•0 comments

WazirX stole my crypto and it might be stealing yours too

https://yashmehrotra.com/posts/wazirx-stole-my-crypto-and-it-might-be-stealing-yours-too/
1•yashmehrotra•18m ago•1 comments

XPitch – Football Match Analysis

http://ismailsunni.id/xpitch/help
1•altilunium•21m ago•0 comments

The Computer That Helped Win World War II

https://spectrum.ieee.org/colossus-computer-ieee-milestone
1•sohkamyung•21m ago•0 comments

Gurus

https://orchidfiles.com/gurus/
2•theorchid•22m ago•0 comments

Publishers consider opting out of Google as search traffic declines

https://www.niemanlab.org/2026/07/search-traffic-has-declined-so-much-that-some-publishers-are-co...
4•giuliomagnifico•23m ago•0 comments

Free WhatsApp Sender

https://wawebsender.com
1•aiqanobzfsej5•25m ago•1 comments

You Can't Lay Off a Datacenter

https://okulez.com/blog/you-cant-lay-off-a-datacenter
4•oku_research•25m ago•0 comments

Show HN: VMKeeper, backups for standalone ESXi without vCenter

https://neurontex.eu/vmkeeper
1•vmeiers•25m ago•0 comments

ChatGPT, the Abacus, and Education (2022)

https://blog.charliemeyer.co/chatgpt-the-abacus-and-education/
1•csmeyer•26m ago•0 comments

Google AI Overviews recommend brands your rank tracker never sees

https://medium.com/@a.galecki/google-ai-overviews-recommend-brands-your-rank-tracker-never-sees-e...
1•NodesHub•27m ago•0 comments

Powerful AIs might escape by releasing themselves as open-weight models

https://www.seangoedecke.com/powerful-ais-might-escape-by-releasing-open-weight-models/
1•jbredeche•28m ago•0 comments

Window Hints – Keyboard-first window switching

https://windowhints.com
2•mihau•29m ago•1 comments

The Missing Step Between Agents and Continual Learning

https://lixinge.substack.com/p/the-missing-step-between-agents-and
1•xgli•29m ago•0 comments