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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•8mo 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!

An A.I. Startup Says It Wants to Empower Workers, Not Replace Them

https://www.nytimes.com/2026/01/20/technology/humans-ai-anthropic-xai.html
1•smoser•24s ago•0 comments

Show HN: Claude skill that scores X posts using X's open-source algorithm

https://github.com/tonkotsuboy/x-impact-checker
1•tonkotsuboy_com•2m ago•0 comments

Front End Architecture Has Reached Its Reasoning Moment

https://spynejs.com/blog/frontend-architecture-has-met-its-reasoning-moment
1•nybatista•2m ago•0 comments

Tech Lead Antipatterns

https://newsletter.terminalprompt.com/p/tech-lead-antipatterns
1•joaoqalves•4m ago•0 comments

Generate a Video from Every Link

https://twitter.com/yonatanbd/status/2013556587911119143
1•yonatan06•6m ago•0 comments

Building an Awesome-Compliance List

https://awesome-compliance.com/
1•ArthurMx•7m ago•0 comments

Netflix Upgrades Warner Bros. Deal to All Cash

https://variety.com/2026/tv/news/netflix-warner-bros-deal-all-cash-shareholder-vote-1236635142/
1•geox•8m ago•0 comments

Ask HN: Call for open community parallel verification system for desktop apps

1•zameermfm•8m ago•0 comments

Show HN: PiRecall – Pi digits memorization game

https://pirecall.netlify.app/
1•ZpJuUuNaQ5•8m ago•0 comments

OpenTelemetry Tracing in 200 lines of code (2024)

https://jeremymorrell.dev/blog/minimal-js-tracing/
1•tosh•9m ago•0 comments

Show HN: AgentCommander - workflow engine for evolutionary code optimization

https://github.com/mx-Liu123/AgentCommander
1•mx-Liu123•9m ago•2 comments

Ask HN: How do solo founders handle security?

1•massi24•9m ago•0 comments

Zohran Mamdani Needs to Create Popular Assemblies

https://jacobin.com/2025/12/mamdani-popular-assemblies-democratic-socialism/
1•PaulHoule•10m ago•0 comments

Coding Agents Are Good First-Time User Testers

https://simedw.com/2026/01/18/agent-user-testing/
2•simedw•13m ago•1 comments

Security Analysis of LTE Connectivity in Connected Cars: A Case Study of Tesla

https://arxiv.org/abs/2510.22024
2•jensgk•13m ago•0 comments

Show HN: Ipfrs – A "Thinking" IPFS in Rust with Built-In Vector Search

https://github.com/cool-japan/ipfrs
2•kitasan•13m ago•0 comments

Show HN: Xhttpy – unified HTTP API request tool (sync/async, stream/non‑stream)

https://github.com/hscspring/xhttpy
1•evil_yam•14m ago•0 comments

Show HN: I've built the "Google Docs" for 3D Files

https://3DViewer.co
1•hugoroussel•14m ago•1 comments

A Lament for Aperture, the App We'll Never Get over Losing

https://ikennd.ac/blog/2026/01/old-man-yells-at-modern-software-design/
1•andrekandre•14m ago•0 comments

Show HN: Swim gossip protocol in Rust with mio/epoll

https://github.com/Paulius0112/swim-rs
1•paul0112•14m ago•0 comments

Well, There Goes the Metaverse

https://techcrunch.com/2026/01/19/well-there-goes-the-metaverse/
2•bulla•16m ago•0 comments

If the future of e-readers is getting weird, I'm here for it

https://sixcolors.com/post/2026/01/if-the-future-of-e-readers-is-getting-weird-im-here-for-it/
1•tosh•16m ago•0 comments

Show HN: A Ring-0 deployment safety checklist(derived from CrowdStrike analysis)

https://github.com/systemdesignautopsy/system-resilience-protocols/blob/main/protocols/ring-0-dep...
1•sysdesautopsy•16m ago•1 comments

HeartMuLa – Open-Source AI Music Foundation Models

https://heartmula.co
1•sarkory•16m ago•1 comments

What's the story behind the arXiv.org favicon?

https://www.quora.com/Whats-the-story-behind-the-arXiv-org-favicon
1•kykeonaut•18m ago•0 comments

Corporate media is missing the moment. We need independent news

https://www.usatoday.com/story/opinion/2026/01/11/corporation-public-broadcasting-pbs-defunded-ci...
2•throw0101c•19m ago•0 comments

API for Current LLM Pricing

https://toktab.com
1•tomd•19m ago•1 comments

Ask HN: Do you have any evidence that agentic coding works?

2•terabytest•20m ago•0 comments

Show HN: E2E mobile testing with plain English. Runs on Android and iOS

https://finalrun.app
1•arnold_laishram•20m ago•1 comments

How X's "For You" feed works (from the source code)

https://growthjoy.io/x-algorithm-summary-2026
1•Biba89•21m ago•0 comments