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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!

My AI converted to Judaism. The other one picked Christianity. Same prompt

https://askthebooks.com/agents
1•kiroxan•1m ago•0 comments

Lua as a practical "soft-bedrock" language

https://portal.mozz.us/gemini/zaibatsu.circumlunar.space/users/solderpunk/gemlog/lua-as-a-practic...
1•birdculture•1m ago•0 comments

AI Tool Development Opportunity

https://news.novonavis.com/smb/dental-practices/orthodontic-solo-small-group-practices/ai-intake-...
1•capagg•6m ago•0 comments

The most popular games on Discord each week

https://discord.com/trending-games
1•dchengy•7m ago•0 comments

SpaceX Is Aiming to Go Public on June 12 in What Stands to Be Biggest IPO

https://www.wsj.com/finance/spacex-is-aiming-to-go-public-on-june-12-in-what-stands-to-be-biggest...
1•JumpCrisscross•10m ago•2 comments

First AI Solar EBike

https://phosgo.com/
1•aziaziazi•10m ago•0 comments

Ofcom and the Fantasy of Global Speech Control

https://reclaimthenet.org/ofcom-and-the-fantasy-of-global-speech-control
3•Cider9986•12m ago•0 comments

London Police Deploy Facial Recognition at Protest for First Time

https://reclaimthenet.org/london-police-deploy-facial-recognition-at-protest-for-first-time
7•Cider9986•12m ago•0 comments

Mitchellh – I strongly believe there are entire companies now under AI psychosis

https://twitter.com/mitchellh/status/2055380239711457578
3•reasonableklout•14m ago•0 comments

He's One of a Dying Breed in Congress. America Needs Him Now More

https://www.nytimes.com/2026/05/14/opinion/thomas-massie-trump-republicans.html
1•Cider9986•14m ago•0 comments

Show HN: TinySearch - Give small LLMs fast web access without context bloat

https://github.com/MarcellM01/TinySearch
1•MarcellM01•18m ago•0 comments

A case for CTOs writing code

https://sunbeams.ai/blog/ctos-writing-code/
3•mooreds•19m ago•0 comments

Tech layoffs have been brutal this year, and are likely to get worse

https://www.sfgate.com/bayarea/article/tech-layoffs-2026-22259249.php
5•pavel_lishin•19m ago•1 comments

How to Raise Multilingual Children

https://storica.club/blog/parents-watch-not-test/
2•yekbun123•19m ago•0 comments

The paper scale system is broken [video]

https://www.youtube.com/watch?v=XllQPr8FtPE
1•fortran77•20m ago•0 comments

The Sad Wives of AI

https://www.wired.com/story/meet-the-sad-wives-of-ai/
6•amai•24m ago•0 comments

The 30-Hour Shift That Turned a San Jose Robot Lab into a Global Spectacle

https://beeble.com/en/blog/the-30-hour-shift-that-turned-a-san-jose-robot-lab-into-a-global-spect...
1•odysseyk•25m ago•0 comments

Show HN: Profine – optimize your PyTorch training script before the run

https://github.com/ProfineAI/profine-cli
1•aisinghal•25m ago•0 comments

AWS user gets $30K Claude bill after cost alert misses it

https://www.theregister.com/saas/2026/05/14/bedrock-and-a-hard-place-claude-adventure-leaves-aws-...
5•p_stuart82•27m ago•0 comments

The Link Between Flock Safety, Dunwoody, and Attorney General Chris Carr

https://jasonhunyar.substack.com/p/inside-the-belly-of-the-beast-the
2•apwheele•27m ago•0 comments

We let four AIs run radio stations

https://andonlabs.com/blog/andon-fm
2•nickoates•28m ago•0 comments

Show HN: Flowy.fm – type any vibe, get music only ever played for that mood

https://www.flowy.fm/
2•timgrossmann•30m ago•0 comments

Show HN: Browser based sythesizer, drum machine and squencer

https://github.com/madmonk13/modal-16
1•madmonk•33m ago•0 comments

Palantir has hired more than 30 senior UK Government officials

https://www.thenational.scot/news/26055524.palantir-hired-30-senior-uk-government-officials/
24•Symbiote•34m ago•1 comments

Even in North Korea, someone's in your parking spot

https://www.reuters.com/business/autos-transportation/even-north-korea-someones-your-parking-spot...
2•johnny_canuck•35m ago•0 comments

I built a bid scoring tool for construction subcontractors

https://bidintell.ai/
1•ryanelder•35m ago•0 comments

Show HN: SharpSkill – Bored to fail my tech interviews for no reason

https://sharpskill.dev/en
2•GiornoJojo•37m ago•0 comments

Microscale Thermite Reaction

https://sciencedemonstrations.fas.harvard.edu/presentations/microscale-thermite-reaction
16•krunck•38m ago•5 comments

The Cottage Book – managing secrets in Git with usage scenarios

https://cottage-cli.pages.dev
1•sayanarijit•41m ago•1 comments

Metriplex – L1 blockchain where identity is a fractal attractor, not a number

https://github.com/NTellezM/Metriplex
1•ntellez•43m ago•0 comments