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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•10mo 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!

Startup wants to change how mathematicians do math

https://www.technologyreview.com/2026/03/25/1134642/this-startup-wants-to-change-how-mathematicia...
1•isaacfrond•2m ago•0 comments

Show HN: We Built 450 Modular Agent Skills for Medical Research

https://github.com/aipoch/medical-research-skills
1•The_resa•5m ago•0 comments

Show HN: Smux – split terminals for AI agents

https://github.com/gergomiklos/smux
1•gregolo•5m ago•0 comments

4.0M tokens for Next.js vs. 2.5M tokens for Wasp: same app, same prompt

https://wasp.sh/blog/2026/03/26/nextjs-vs-wasp-40-percent-less-tokens-same-app
1•matijash•8m ago•0 comments

Ask HN: Why do you flag a service when it goes down?

1•haebom•9m ago•0 comments

Vibe coding could mark the end of the App Store review process as we know it

https://9to5mac.com/2026/03/29/vibe-coding-developers-report-long-app-store-review-queues/
1•thm•11m ago•0 comments

The case for a universal basic income in the era of A.I

https://www.americamagazine.org/short-take/2026/03/23/universal-basic-income-ai/
1•robtherobber•13m ago•0 comments

Galton's Law of Mediocrity: Why Large Language Models Regress to the Mean

https://arxiv.org/abs/2509.25767
2•camillomiller•15m ago•0 comments

Stripe stole $85k and closed our account

5•MelkerWendelbo•20m ago•4 comments

Apple nailed AI by doing fucking nothing lol

https://xcancel.com/cryptopunk7213/status/2038351931589193953?s=20
3•doener•24m ago•0 comments

Stripe Dashboard Down

1•HPMOR•24m ago•0 comments

Stripe Is Down

https://dashboard.stripe.com/login
9•tompccs•25m ago•4 comments

In Praise of Plasma TVs

https://hackaday.com/2025/11/18/in-praise-of-plasma-tvs/
1•jruohonen•26m ago•0 comments

Show HN: AnyVali – Validation library that works the same across 10 languages

https://anyvali.com/
1•mrinc•28m ago•0 comments

GPL-compliant reasonable legal notices and author attributions

https://www.fsf.org/blogs/community/gpl-compliant-legal-notices-author-attributions
2•Tomte•30m ago•0 comments

You're right to be anxious about AI: This is how much we are building

https://www.dumky.net/posts/youre-right-to-be-anxious-about-ai-this-is-how-much-we-are-building/
3•dmkii•41m ago•3 comments

Mathematical methods and human thought in the age of AI

https://terrytao.wordpress.com/2026/03/29/mathematical-methods-and-human-thought-in-the-age-of-ai/
2•jjgreen•43m ago•0 comments

Swift SDK for Android

https://www.swift.org/documentation/articles/swift-sdk-for-android-getting-started.html
2•devy•48m ago•0 comments

Polygraphs have major flaws. Are there better options?

https://undark.org/2026/03/25/lie-detection-polygraph-accuracy/
3•Tijana329•52m ago•0 comments

Stripe Is Down

https://downdetector.fr/en/status/stripe/
6•pinter69•54m ago•0 comments

Show HN: IsDisposable – Open-source disposable email detection (160K+ domains)

https://www.npmjs.com/package/@isdisposable/js
2•junaidshaukat•54m ago•0 comments

Mistral raises $830M to build Nvidia-powered AI centres in Europe

https://www.ft.com/content/229f4f59-d518-4e00-abd6-5a5b727cd2aa
3•macleginn•55m ago•2 comments

Show HN: I'm a Happy Engineer [video]

https://www.youtube.com/watch?v=f1a_MRLibqU
2•denysvitali•58m ago•0 comments

How to Survive in the Tech industry in 2026

https://blog.phuaxueyong.com/post/2026-03-23-how-to-survive-tech-in-2026/
9•xueyongg•1h ago•3 comments

How Can Universities Value-Add Their Alumni?

https://blog.phuaxueyong.com/post/2025-06-27-university-role-in-alumni-engagement/
2•xueyongg•1h ago•0 comments

The CTO's Burden: Building What the World Doesn't See

https://blog.phuaxueyong.com/post/2025-04-29-questions-for-cto/
2•xueyongg•1h ago•0 comments

Show HN: Travel app that replaces trip research with a 30s briefing (TestFlight)

https://globallybased.com
2•ilyagruzhevski•1h ago•3 comments

Sad Story of Soviet Compact Disc Players

https://sovietrock.com/mediums/cd/sad-story-of-soviet-compact-disc-players/
2•thenthenthen•1h ago•0 comments

Credential Broker for Agents (CB4A)

https://datatracker.ietf.org/doc/draft-hartman-credential-broker-4-agents/
1•jruohonen•1h ago•0 comments

We tricked 1M+ bots and hackers with our honeypot

https://github.com/BlessedRebuS/Krawl
2•blessedrebus•1h ago•1 comments