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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!

Chad Fowler's "Phoenix Architecture"

https://stevekrouse.com/phoenix
1•stevekrouse•52s ago•0 comments

Show HN: Jensen – a Deus Ex: Human Revolution theme for 30 developer apps

https://tomaytotomato.github.io/jensen/
1•tomaytotomato•1m ago•0 comments

GPT 5.5 uses Grug Brained talk during reasoning for 2x token efficiency

https://www.youtube.com/watch?v=ypO0q_8zhWw
1•m3h•2m ago•0 comments

SlateDB: An Object-Native LSM for Online Systems

https://slatedb.io/blog/introducing-slatedb/
1•agavra•2m ago•0 comments

Why AI Hasn't Cured Anything yet [video]

https://www.youtube.com/watch?v=n-hWHV2ZKOA
1•gurjeet•2m ago•0 comments

Stack Overflow 2026 developer survey now open

https://take.survey.stackoverflow.co/jfe/form/SV_4GHunpL3IfJ3rRc
1•khurs•2m ago•0 comments

Skill.md AI Crawler Visibility

https://github.com/MerqryLabs/ai-crawler-visibility
2•novaesystems•4m ago•0 comments

WordPress Vulnerability Scan Came Back Clean. Are You Still Exposed?

https://blog.wpsec.com/your-wordpress-vulnerability-scan-came-back-clean-are-you-still-exposed/
1•jonasl•4m ago•0 comments

Cinder Dial, a molten forge-machine turning in real time

https://sand-morph.up.railway.app/grand-elemental
1•echohive42•4m ago•0 comments

SCOTUS Decision: Law Enforcement's Use of 'Geofence Warrant' Was a 'Search'

https://daringfireball.net/2026/06/scotus_geofence_warrant_search
1•coloneltcb•5m ago•0 comments

We used coding agents to add RonSQL support to RonDB

http://mikaelronstrom.blogspot.com/2026/06/experiences-from-new-wave-of-ai.html
1•jamesblonde•6m ago•0 comments

Show HN: Frontier AI Lab Jobs – Open Jobs by Function at OpenAI, Anthropic

https://frontierjobs.org/
1•te_ch•8m ago•0 comments

Bromure Agentic Coding: Wrap agent in a VM and proxy that VM, preventing leaks

1•pixdamix•9m ago•0 comments

Tokyo has only two barley tea makers, we visited one to see how mugicha is made

https://soranews24.com/2026/06/30/tokyo-has-only-two-barley-tea-makers-and-we-visited-one-to-see-...
2•zdw•10m ago•0 comments

Learning to Replicate Expert Judgment in Financial Tasks

https://thinkingmachines.ai/news/learning-to-replicate-expert-judgment-in-financial-tasks/
1•dphuang2•11m ago•0 comments

Q&A with Micron's VP and GM of Memory

https://morethanmoore.substack.com/p/q-and-a-with-microns-vp-and-gm-of
1•zdw•12m ago•0 comments

Hologram v0.10: Events and middleware for Elixir running in the browser

https://hologram.page/blog/hologram-v0-10
1•bartblast•12m ago•0 comments

Warp raises $60M Series B

https://www.warp.co/b
3•dphuang2•14m ago•3 comments

AI Could Be the Railroad of the 21st Century. Brace Yourself

https://www.derekthompson.org/p/artificial-intelligence-could-be
2•simonebrunozzi•15m ago•0 comments

Wall-run (4k:c64,v20,c16,zx,PC)

https://orac81.itch.io/wall-run
3•orac81•21m ago•2 comments

Maestral open-source Dropbox client no longer actively supported

https://maestral.app/
4•rja65•22m ago•0 comments

Volkswagen's Crisis in Five Charts

https://www.reuters.com/business/autos-transportation/volkswagens-crisis-five-charts-2026-06-30/
1•leonidasrup•24m ago•0 comments

2021 Florida Condo Collapse. NIST Investigation Concluded

https://www.popularmechanics.com/science/a71731922/surfside-condo-collapse/
2•bryan0•25m ago•1 comments

Doubt that Elon Musk 'earned' his trillion?

https://www.theguardian.com/global/commentisfree/2026/jun/30/elon-musk-trillion-rightwing-media
4•jethronethro•28m ago•0 comments

OrgForge: The Next Step in Enterprise AI Simulation

https://www.machinebrief.com/news/orgforge-the-next-step-in-enterprise-ai-simulation-u364
2•decorner•28m ago•0 comments

wrtK8s [video]

https://www.youtube.com/watch?v=QcRyje_gGYM
1•JustinGarrison•28m ago•1 comments

Scientists Unlock Hidden DNA from 1,300-Year-Old Manuscripts

https://scitechdaily.com/scientists-unlock-hidden-dna-from-1300-year-old-manuscripts/
1•bookofjoe•29m ago•0 comments

There's panic buying of fuel in Russia now

https://www.youtube.com/watch?v=1zVjnH1yc_I
1•t23414321•29m ago•0 comments

Rock Balloons. (4k:c64/v20/c16/zx/pc)

https://orac81.itch.io/rock-balloons
1•orac81•30m ago•0 comments

Google introduces a faster, cheaper image generator with Nano Banana 2 Lite

https://techcrunch.com/2026/06/30/google-introduces-a-faster-cheaper-image-generator-with-nano-ba...
1•ameypandey•34m ago•0 comments