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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!

Ask HN: How much are you spending on AI coding at work?

1•habosa•43s ago•0 comments

Where hard water causes kidney failure: a field visit to eastern Ethiopia

https://charitysense.com/insights/the-cost-of-bad-water
1•mtweak•53s ago•0 comments

Jensen's Trillion-Dollar Token Factory

https://crazystupidtech.com/2026/03/22/jensens-trillion-dollar-token-factory/
1•herbertl•4m ago•0 comments

Simple Git Branching/Weekly Summary Claude Skills

1•daltonlcarr•5m ago•0 comments

Show HN: AI Models AI Capex

https://ai-capex-sens-wxc4b.ondigitalocean.app/
1•liujjw•8m ago•0 comments

OpenClaw high level architecture review

https://contextbento.substack.com/p/openclaw-high-level-architecture
1•visopsys•9m ago•0 comments

Flagr – feature flag evaluation at p95 <1ms with no network call

https://flagr.dev
1•perodriguezl•10m ago•0 comments

Garry Kasparov: The Chess Master and the Computer (2010)

https://www.nybooks.com/articles/2010/02/11/the-chess-master-and-the-computer/
1•mitchbob•16m ago•1 comments

Starlette 1.0

https://marcelotryle.com/blog/2026/03/22/starlette-10-is-here/
2•vismit2000•17m ago•0 comments

Ask HN: How do you compare cloud and AI costs across providers?

2•FinDevOps•20m ago•0 comments

The U.S. Military's Abrams Tank Is Going Hybrid

https://insideevs.com/news/784805/abrams-m1e3-hybrid-tank-video-specs-power/
1•kelseyfrog•20m ago•0 comments

I launched a new SaaS product

https://landager.com/en
2•melvinprince•23m ago•3 comments

Understanding kubectl top Output Columns

https://randomwrites.com/operations/09-Resource-Troubleshooting
1•mutahirs•27m ago•2 comments

Agentic AI requires compute that can't be measured in tokens alone

https://www.revenuemodel.ai/agentic-ai-requires-more-compute-that-is-not-measured-in-tokens/
1•alanjacobson•28m ago•0 comments

Thermal Grizzly hit by China metal scam

https://www.pcgamer.com/hardware/a-simple-check-with-a-magnet-was-the-final-clue-that-made-therma...
3•libpcap•30m ago•0 comments

Activist Elliott Builds Big Stake in EDA Chip-Design Software Maker Synopsys

https://www.wsj.com/business/deals/activist-elliott-builds-big-stake-in-chip-design-software-make...
1•walterbell•35m ago•0 comments

The first modern rocket launched 100 years ago

https://theconversation.com/the-first-modern-rocket-launched-100-years-ago-beginning-a-century-of...
1•geox•37m ago•0 comments

Calm: LLMs That Predict Vectors Instead of Tokens

https://shaochenze.github.io/blog/2025/CALM/
1•IndignantTyrant•39m ago•0 comments

Show HN: Quillium, Git for Writers

https://quillium.bryanhu.com/
3•thatxliner•40m ago•0 comments

Crunchyroll's customer analytics data breached via outsourcing partner Telus

https://twitter.com/IntCyberDigest/status/2035864555805413448
1•badcryptobitch•43m ago•0 comments

Show HN: ClauseGuard – AI contract review in 90s, finds risks, writes redlines

https://www.theclauseguard.com
1•ebuyan•44m ago•0 comments

Show HN: Plot-Hole.com a daily movie puzzle I made

https://www.plot-hole.com/
2•captaincrunch•47m ago•1 comments

Migrating the American Express Payment Network, Twice

https://americanexpress.io/migrating-the-payments-network-twice/
3•madflojo•47m ago•0 comments

PewPew – real-time SSH attack visualizer, single Go binary

https://github.com/awakeelectronik/pewpew
2•awakeelectronik•57m ago•0 comments

How do we build production-ready AI systems?

https://docs.struere.dev
3•MarcoKueks•58m ago•6 comments

Men are losing a key chromosome with age and it may be deadly

https://www.sciencedaily.com/releases/2026/03/260319044711.htm
4•bookofjoe•58m ago•0 comments

Obesity may come in 11 different types, each with their own cause

https://www.newscientist.com/article/2488744-obesity-may-come-in-11-different-types-each-with-the...
1•paulpauper•1h ago•1 comments

Iconic Australian-made pinball machines preserved for generations to come

https://www.abc.net.au/news/2026-03-12/pinball-machines-collected-nfsa-hankin/105971386
3•gnabgib•1h ago•0 comments

What if Elon built a decentralized AI network?

http://heatmine.ai/
1•scharf•1h ago•0 comments

Plexus – Unified API gateway for multiple AI providers

https://github.com/mcowger/plexus
1•indigodaddy•1h ago•0 comments