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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!

A maintainability ratchet for AI-assisted Python

https://kayhan.dev/posts/014-letting-agents-write-code-without-ratcheting-up-risk/
1•keynha•2m ago•0 comments

Why Your Docker Container Is 1.2GB When It Should Be 80MB

https://sandeepbansod.medium.com/why-your-docker-container-is-1-2gb-when-it-should-be-80mb-7b443a...
1•thunderbong•6m ago•0 comments

Show HN: TapToyPia

https://memalign.github.io/m/taptoypia/index.html
1•memalign•7m ago•0 comments

Why AI Hardware Is a Chip Layer Problem

https://www.easelinktech.com/why-every-electronic-product-may-need-to-be-rebuilt-for-on-device-ai...
1•EnXu•9m ago•0 comments

Hershey is a textual vector font format

https://wiki.xxiivv.com/site/hershey.html
1•birdculture•9m ago•0 comments

All Lean Books and Where to Find Them

https://lakesare.brick.do/all-lean-books-and-where-to-find-them-x2nYwjM3AwBQ
1•atomicnature•11m ago•0 comments

Instantly understand why any stock is moving

https://whystockmove.com
1•crixusbaba•16m ago•0 comments

InboxFlow Agent – Check your email campaigns before sending

https://github.com/selimsevim/QA-testing-agent
1•selimsevim•18m ago•0 comments

Claude hack – Don't waste you token where it's not needed

https://github.com/justinjamesmathew/tokenmax-mcp
1•justin1006•22m ago•0 comments

Ask HN: I mapped 6,494 AI engines into a taxonomy – anyone else tried this?

1•Developer_H•22m ago•0 comments

1,700 new protein found in the "dark proteome" of previously overlooked DNA

https://pubmed.ncbi.nlm.nih.gov/42092140/
2•janandonly•23m ago•0 comments

Coding agents are giving everyone decision fatigue

https://stackoverflow.blog/2026/05/21/coding-agents-are-giving-everyone-decision-fatigue/
2•vinhnx•30m ago•0 comments

It's Time to Walk

https://www.inferterra.com/the-new-workspace-a-first-principles-exploration-of-dictation-agents-a...
1•vinhnx•31m ago•0 comments

Prof or Hobo?

https://www.proforhobo.com/
1•Paracompact•34m ago•0 comments

The Four Motivators (2016)

https://apenwarr.ca/log/20161213
2•downbad_•43m ago•0 comments

Sleep and Mortality: A Population-Based 22-Year Follow-Up Study (2007)

https://fermatslibrary.com/s/sleep-and-mortality-a-population-based-22-year-follow-up-study
2•downbad_•43m ago•1 comments

Local Root Privilege Escalation and Credential Disclosure in the Linux Kernel

https://blog.qualys.com/vulnerabilities-threat-research/2026/05/20/cve-2026-46333-local-root-priv...
1•signa11•45m ago•0 comments

China behind in LLM race but it can still win in AI, ex-Tencent AI lead says

https://www.scmp.com/tech/big-tech/article/3354394/china-losing-llm-race-it-can-still-win-ai-ex-t...
1•01-_-•46m ago•0 comments

Newsom signs order aimed at tackling AI job displacement

https://thehill.com/policy/technology/5889582-california-ai-job-losses/
1•01-_-•49m ago•0 comments

Ruby Arrays on Steroids (2014) [video]

https://www.youtube.com/watch?v=UX7xmhpUoi4
1•tosh•49m ago•0 comments

How AI is redefining Software Engineering

https://adlrocha.substack.com/p/adlrocha-how-ai-is-redefining-software
1•adlrocha•55m ago•0 comments

The Internet is rotting away (German)

https://netzpolitik.org/2026/breakpoint-das-internet-verrottet/
3•doener•56m ago•0 comments

Show HN:An LED display app that lights up concerts, events, and fan moments

https://play.google.com/store/apps/details?id=com.koko.board.glow&hl=en_US
1•k-Whale•1h ago•1 comments

uP

https://www.micropublication.org/
2•jruohonen•1h ago•1 comments

Hiro, AI job matching with real visa sponsorship data (550K jobs)

https://hirocareers.com
1•sharvenrane7•1h ago•0 comments

Wild Linker Update – 0.9.0

https://davidlattimore.github.io/posts/2026/05/24/wild-update-0.9.0.html
3•dabinat•1h ago•0 comments

WarpSpeed Just Beat Cursor

https://www.doubleai.com/research/warpspeed-approaches-speed-of-light-on-blackwell
2•ben_mussay•1h ago•0 comments

For developers without design skills, how do you leverage AI for front end dev?

1•boundless88•1h ago•0 comments

The anatomy of AI power in 2026

https://wayneresearch.com/research/anatomy-of-ai-power/
1•7moritz7•1h ago•0 comments

Solving the Technical Interview

https://functional.computer/blog/solving-the-technical-interview
1•adhi01•1h ago•0 comments