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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!

Show HN: Agnt – Free open-source CLI to run any public or MIT-licensed AI agent

1•meajsinghk22•2m ago•0 comments

Show HN: Due Diligence Agents – 13 AI agents for M&A contract analysis

https://github.com/zoharbabin/due-diligence-agents
1•zoharbabin•2m ago•0 comments

Realtime Stocks Prices that you can put Fullscreen

https://stocks.stagas.deno.net/
1•stagas•3m ago•0 comments

Open Itinerary

http://bryanhu.com/open-itin/
1•thatxliner•4m ago•1 comments

A Family Secret No More

https://www.nytimes.com/2026/05/15/us/degrange-family-history-race.html
1•js2•4m ago•0 comments

Checking Multiplication Overflow

https://lemire.me/blog/2026/05/06/checking-multiplication-overflow/
1•tosh•5m ago•0 comments

CarTalk-AMP: Search and Play Car Talk Episodes

https://cartalk-amp.exe.xyz
1•indigodaddy•5m ago•0 comments

Back in My Day

https://old.reddit.com/r/opencodeCLI/comments/1tftit9/back_in_my_day/
2•theanonymousone•6m ago•0 comments

Show HN: Kami Subs – Live AI subtitles overlay for any browser video

https://github.com/MohammdKopa/kami-subs
1•mohamedkeba•7m ago•0 comments

Neptune: Direct3D Virtualization for QEMU

https://blog.getutm.app/2026/introducing-neptune-direct3d-virtualization-for-qemu/
1•linolevan•8m ago•0 comments

Almost there: Aptera has built five solar EVs on their validation assembly line

https://aptera.us/first-five-vehicles/
1•TeaVMFan•8m ago•1 comments

Why this 26-year-old software engineer doesn't want a promotion

https://www.reuters.com/markets/on-the-money/why-this-26-year-old-software-engineer-doesnt-want-p...
2•tartoran•11m ago•0 comments

Can Bloom Energy build them?

https://theloadgrowth.substack.com/p/can-bloom-energy-build-them
2•agordhandas•14m ago•0 comments

WHO declares Ebola outbreak in Congo, Uganda emergency of international concern

https://www.reuters.com/business/healthcare-pharmaceuticals/who-declares-ebola-outbreak-congo-uga...
2•tartoran•14m ago•0 comments

F.03 Livestream – Watch a team of humanoid robots running a full 8-HR shift [video]

https://www.youtube.com/watch?v=luU57hMhkak
1•Teever•14m ago•0 comments

A bad blog post led to GamerGate and the rise of the alt-right

https://www.dontbeasucker.blog/p/you-are-what-you-beat
1•betterthanever•14m ago•0 comments

Curated list of 736 verified remote tech companies hiring (May 2026)

https://dj5333111-ux.github.io/traction-data/
3•tractiondata•15m ago•1 comments

Dontsurveil.me

https://opencivics-labs.github.io/dontsurveil.me/c22.html
1•laurex•16m ago•1 comments

The clean-up cost of AI-generated code is what the velocity narrative leaves out

https://webflow.com/blog/cleanup-cost-ai-generated-code
1•Brajeshwar•17m ago•0 comments

AI can fix the fragmented online public transport space

https://simianwords.bearblog.dev/ai-can-fix-the-fragmented-online-public-transport-space/
1•simianwords•21m ago•0 comments

He Federal Data Field Guide

https://www.federaldatafieldguide.us/
1•firexcy•23m ago•0 comments

Pokemon NPCs Powered by Local LLMs

https://www.owenmc.dev/posts/local-inference-npcs
1•owenmccadden•25m ago•0 comments

Mistral's CEO: Europe has 2 years to stop becoming America's AI 'vassal state'

https://www.businessinsider.com/mistral-ceo-warns-europe-2-years-avoid-us-ai-dependence-2026-5
2•LelouBil•26m ago•0 comments

Mudflat Hiking

https://en.wikipedia.org/wiki/Mudflat_hiking
1•debarshri•27m ago•0 comments

Don't Outsource the Learning

https://addyosmani.com/blog/dont-outsource-learning/
1•korecodes•27m ago•0 comments

In 1979 engineer Hugh Padgham discovered "gated reverb" – by accident

https://producelikeapro.com/blog/how-one-recording-mistake-created-a-musical-phenomenon-in-the-80s/
1•bookofjoe•30m ago•0 comments

I want to try S.Y's GasTown to create code from a Spec without spending any $

https://github.com/stevef1uk/freeride
1•apiemotion•31m ago•1 comments

JSON logging isn't enough anymore: A deep dive into OTel Logs

https://www.dash0.com/knowledge/opentelemetry-logging-explained
1•ayoisaiah•33m ago•0 comments

Poll: Do you customize the TCP/IP settings of your OS, Router or Firewall?

1•Bender•34m ago•0 comments

Ask HN: Reading AI Assisted Essays

1•parentheses•36m ago•0 comments