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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!

What 2026 looks like (2021)

https://www.alignmentforum.org/posts/6Xgy6CAf2jqHhynHL/what-2026-looks-like
1•mbeavitt•1m ago•1 comments

Coding agents supercharge Murphy's Law

https://hatchet.run/blog/murphys-law
1•abelanger•2m ago•0 comments

Prompt Caching in Agents

https://earendil.com/posts/prompt-caching/
1•lobo_tuerto•2m ago•0 comments

Builders lack an audience, Creators lack building skills

1•yurimhln•2m ago•0 comments

Neutrinos from Deep Inside Earth Provide a New Picture of the Mantle

https://www.quantamagazine.org/neutrinos-from-deep-inside-earth-provide-a-new-picture-of-the-mant...
1•lschueller•3m ago•0 comments

Evolution, Not Reset: Prepare Platform Engineering 2.0 for Autonomous Agents

https://platformengineering.com/features/evolution-not-reset-prepare-platform-engineering-2-0-for...
2•CrankyBear•4m ago•0 comments

McFarthest – The Greatest Distance from McDonald's

https://www.themeateater.com/conservation/public-lands-and-waters/bar-room-banter-mcfarthest-the-...
1•Aeroi•6m ago•0 comments

Harica Revoked 63,525 SSL Certificates in Five Days

https://tlsradar.com/blog/harica-mass-revocation-2026
1•tlsradar•6m ago•0 comments

Signal planning one-time payment for optional sign up without a phone number

https://aboutsignal.com/news/signal-login-registration-without-a-phone-number/
3•rvz•7m ago•0 comments

Show HN: Vaultak – Security for AI agents (built before the breaches started)

https://vaultak.com
1•samoladji•7m ago•0 comments

Automated and easy EU AI Act compliance

https://scanara.io/en/
1•scanara•7m ago•0 comments

Best temp mail Firefox extension

https://addons.mozilla.org/en-GB/firefox/addon/tempfox-multi-mail-otp/
1•skyyfisk•7m ago•0 comments

Neal: Codex and Claude in a loop shipped a 549-commit migration

https://navels.dev/blog/neal/
1•navels•8m ago•0 comments

Origins of Life on Earth by Tracing Early Chemical Reactions

https://www.smithsonianmag.com/science-nature/a-new-study-points-to-two-origins-of-life-on-earth-...
1•nhatcher•9m ago•0 comments

Decompiling the Android Developer Verifier App

https://blck-b.github.io/post/android-verifier/
1•blck-b•10m ago•0 comments

Turning Claude into Postgres so I can raise a Series A

https://byteofdev.com/posts/turning-claude-postgres/
1•JeanSebTr•11m ago•0 comments

Show HN: We Built MicroLeague Sports Vol. 3

https://medium.com/@esolar_18069/why-we-built-microleague-sports-vol-3-f3d7cedfed9d
2•esolar07•11m ago•0 comments

Nobody Died – and That's the Scary Part – Oshkosh 2026 [video]

https://www.youtube.com/watch?v=4rJEtpQ0r6A
2•marklit•13m ago•1 comments

Show HN: A workflow for building community skill catalogs

https://github.com/thinkingoracle/luke-skills
1•noobdabber•15m ago•0 comments

Qwen 3.8-Max Preview

https://manish.sh/writings/models/inside-qwen-3-8-max-preview-reverse-engineering-an-ai-assistant...
2•ms7892•16m ago•0 comments

Building an AI Chat for My Blog: Gemini, Cloud Functions, $5-15/Month

https://emergencemachine.com/building-an-ai-chat-for-my-blog/
1•speckx•17m ago•0 comments

Authentication and User Management Software: FusionAuth [audio]

https://sourceforge.net/articles/authentication-user-management-software-fusionauth-sourceforge-p...
1•mooreds•19m ago•0 comments

Improving mouse traps with Home Assistant

https://highlyprobable.io/posts/improving-mouse-traps-with-automation
1•darkpicnic•19m ago•0 comments

US Wildfire Incident Information System

https://inciweb.wildfire.gov:443/
3•mooreds•20m ago•0 comments

Simon Willison on Technical Blogging

https://writethatblog.substack.com/p/simon-willison-on-technical-blogging
1•mooreds•21m ago•0 comments

A Year of Saving Our Signs

https://www.datarescueproject.org/a-year-of-sos/
1•hn_acker•22m ago•0 comments

An all-sky map of half a million supermassive black holes

https://www.sdss.org/black-hole-mapper-release-20/
1•MarcoDewey•23m ago•0 comments

Even The New York Times "isn't immune" to declining search traffic

https://www.niemanlab.org/2026/08/even-the-new-york-times-isnt-immune-to-declining-search-traffic...
1•ChrisArchitect•23m ago•0 comments

I wrote my first C project after a long time. Unix wc clone. NO AI

https://github.com/emanueleoggiano/word_count
2•emanueleoggiano•23m ago•1 comments

Towards a Local-First Desktop (Guadec 2026) [video]

https://www.youtube.com/watch?v=qnF9NzBidPA
2•amlib•24m ago•0 comments