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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: SharePad – share a USB iPad as a clean window in any call

https://sharepad.co/
1•jonyardley•1m ago•0 comments

Vellum Studio – Word to PDF Offline Android App

https://play.google.com/store/apps/details?id=com.vertexapp.vellumpdfstudio.app&hl=en_US
1•vertexapps•4m ago•1 comments

The Return of Rigorous Full-System Timing Simulation

https://www.sigarch.org/the-return-of-rigorous-full-system-timing-simulation/
1•matt_d•9m ago•0 comments

AI Agents Enable Adaptive Computer Worms

https://cleverhans.io/worm.html
1•xyzal•9m ago•0 comments

Can open-source beat OpenAI?

https://restofworld.org/2026/tiezhen-wang-china-us-open-source-ai/
5•devonnull•17m ago•0 comments

Show HN: FlashQwen – A from-scratch CUDA inference engine for Qwen3

https://github.com/frankkk96
1•langtang1996•19m ago•0 comments

Visual Studio Code is designed to fracture (2022)

https://ghuntley.com/fracture/
1•Tomte•20m ago•0 comments

How to set a static IP address for an Nginx outbound proxy

https://outboundgateway.com/blogs/nginx-static-ip-outbound-proxy/
1•thomster•27m ago•0 comments

Language integrated LLMs as an OCaml function

https://anil.recoil.org/notes/language-integrated-llms
1•matt_d•33m ago•0 comments

AI Is Not Conscious, but It Is Becoming Our Unconscious

https://theconvivialsociety.substack.com/p/ai-is-not-conscious-but-it-is-becoming
1•mellosouls•34m ago•0 comments

I Could've Rickrolled the FIFA World Cup. All I Needed Was My ID

https://bobdahacker.com/blog/fifa-hack
18•BobDaHacker•35m ago•2 comments

So I built something to listen to customer complaints

https://old.reddit.com/r/SideProject/comments/1u74ern/so_i_built_something_to_finally_listen_to/
1•bishwasbh•37m ago•0 comments

YouTube Cracks Down on AI Slop

https://www.hollywoodreporter.com/business/digital/faceless-creators-youtube-ai-damage-1236617586/
3•l33tbro•38m ago•0 comments

Meet the world's top AI-Pilled Economists

https://www.economist.com/finance-and-economics/2026/06/15/meet-the-worlds-top-ai-pilled-economists
2•1vuio0pswjnm7•38m ago•0 comments

Steel and chemicals giants demand freeze to EU's flagship climate policy

https://www.politico.eu/article/steel-and-chemicals-giants-demand-freeze-to-eus-flagship-climate-...
1•leonidasrup•39m ago•0 comments

Crypto Clarity AI

https://cryptoclarityai.com/
1•CryptoClarityAI•45m ago•0 comments

Catalog of Cycling Workouts to browse/download/share

https://cyclingintervals.com/
1•purec•52m ago•1 comments

Survey of the moniliths by fable 5 – short film in HTML

https://sand-morph.up.railway.app/survey-of-monoliths
1•echohive42•56m ago•0 comments

Quantum Entanglement for Dummies

https://zenodo.org/records/20128508
2•phdlalala•58m ago•0 comments

John Carmack on Fabrice Bellard

https://twitter.com/ID_AA_Carmack/status/2064095424420487226
4•apitman•1h ago•0 comments

Russian Spam and Profanities Are Now Plaguing the Arch Linux AUR

https://www.phoronix.com/news/Arch-Linux-AUR-Russian-Spam
2•Lockal•1h ago•0 comments

Facebooks App description is "hacked" in Play Store [video]

https://www.youtube.com/shorts/UWaIinB84q4
1•tbqq•1h ago•0 comments

Inside FIFA's World Cup Technology [video]

https://www.youtube.com/watch?v=JRhwXYfrlss
1•ofrzeta•1h ago•1 comments

Anthropic Pauses Its Claude Agent SDK Billing Change

https://origami.sa/en/blog/anthropic-pauses-agent-sdk-subscription-billing-change/
1•dockerd•1h ago•0 comments

Smarter Models, Dumber Security

https://manveerc.substack.com/p/mcp-supply-chain-attack-vector
1•manveerc•1h ago•0 comments

Ask HN: What Jobs (Roles) are in the best position to take advantage of AI?

2•CWhiting•1h ago•0 comments

Stanford CS153 Frontier Systems – Scale, AGI, and the Future of Everything [video]

https://www.youtube.com/watch?v=F_7M4Hc-usM
2•twalichiewicz•1h ago•0 comments

You've Been Murdoched: Australia's Teen Ban Offers a Warning for Europe

https://www.techpolicy.press/youve-been-murdoched-australias-teen-ban-offers-a-warning-for-europe/
5•mathgenius•1h ago•0 comments

The time the x86 emulator team found code so bad they fixed it during emulation

https://devblogs.microsoft.com/oldnewthing/20260615-00/?p=112419
92•paulmooreparks•1h ago•10 comments

Opportunity Media Reel

https://www.youtube.com/watch?v=5MqWgtyfBxw
2•Eridanus2•1h ago•0 comments