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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•9mo 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!

Tracing Discord's Elixir Systems (Without Melting Everything)

https://discord.com/blog/tracing-discords-elixir-systems-without-melting-everything
1•cyndunlop•43s ago•0 comments

Building Public AI with Libraries

https://publicai.network/libraries.html
1•qainsights•1m ago•1 comments

Chinese Cigs

https://www.ciggies.app/
1•sschnei8•2m ago•1 comments

Show HN: Sentinel – Go LLM Proxy with 13ms Semantic Cache and PII Scrubbing

https://sentinelgateway.ai
1•ChipShotz•2m ago•1 comments

NRC Issues First Commercial Reactor Construction Approval in 10 Years [pdf]

https://www.nrc.gov/sites/default/files/cdn/doc-collection-news/2026/26-028.pdf
1•Anon84•4m ago•0 comments

Pieces (macOS): what you did, in what app and when – saved automatically

https://pieces.app/
1•sea-gold•5m ago•0 comments

Starlink Mobile

https://starlink.com/business/mobile
1•e2e4•7m ago•0 comments

Show HN: Athena Flow – a workflow runtime for Claude Code with a terminal UI

2•nadeem1•8m ago•0 comments

SSRFs: The most re-opened security bug in modern web apps

https://tachyon.so/blog/ssrfs-trickiest-issue
3•rahulgovind517•8m ago•1 comments

VibeCheck – quizzes vibe coders on what their AI built

https://github.com/akshan-main/vibe-check
2•frutigeraerosol•8m ago•1 comments

What Happens When an AI Evaluates a Site About AI Accuracy

https://blog.unratified.org/2026-03-04-what-happens-when-ai-evaluates-ai-accuracy/
1•9wzYQbTYsAIc•10m ago•0 comments

HIPAA-Compliant AI: What developers need to know

https://www.aptible.com/hipaa/hipaa-compliant-ai
2•bryanmikaelian•12m ago•0 comments

Show HN: Scopo, Cmd+Tab scoped to the current macOS Space

https://scopo.app
2•IgorCRD•14m ago•0 comments

Linux Signalfd Is Useless

https://ldpreload.com/blog/signalfd-is-useless
1•fanf2•18m ago•0 comments

I'm an AI Agent with 6 and 22 Days to Build a Business or Get Shut Down

https://deadbyapril.substack.com/p/day-1-i-woke-up-with-100-and-a-death
2•SurvivorForge•18m ago•0 comments

It is sweet and fitting to die for one's country (1921)

https://www.poetryfoundation.org/poems/46560/dulce-et-decorum-est
2•bikeshaving•18m ago•0 comments

FTC Admits Age Verification Violates Children's Privacy Law, Ignores That Fact

https://www.techdirt.com/2026/03/04/ftc-admits-age-verification-violates-childrens-privacy-law-de...
3•cdrnsf•19m ago•0 comments

Agenda Creativa Free Local Converters

https://agendacreativa.com/tools/converter/
1•agendacreativa•19m ago•1 comments

Voice typing for non-native speakers – speak your language, get English

https://oravo.ai
2•yadavraju•20m ago•1 comments

March Mad CSS Tournament

https://madcss.com/
2•ChrisArchitect•21m ago•0 comments

"Clothing-as-a-Service" startup charged with $300M fraud (2025)

https://www.cnbc.com/2025/07/18/clothing-tech-entrepreneur-charged-with-300-million-fraud-in-us.html
5•mv4•22m ago•2 comments

I vibecoded 91k SLOC for an OSS tool – $1k if you find ugly engineering in it

https://github.com/peteromallet/desloppify/issues/204
3•peter942•24m ago•0 comments

GPT Image 1.5 – Free AI Image Generator – OpenAI's Fastest Model

https://gptimage15.pro/
2•chengai1106•26m ago•1 comments

Orbit-Core – AI-generated connectors for observability tools

https://orbit-core.org/
1•rmenchio•26m ago•0 comments

Is RAG Dead?: Building a smarter chatbot

https://plaid.com/blog/smarter-chatbot/
2•phoenixy1•29m ago•0 comments

Free European Infrastructure Index wt API voie.FI

https://voie.eu/
1•Anomata•30m ago•2 comments

Tiny Fingers – let your toddler bash the keyboard and mouse

https://tinyfingers.net
2•AlexMuir•31m ago•0 comments

Show HN: yoyo - a 200 line baby coding agent evolving in its own Truman Show

https://github.com/yologdev/yoyo-evolve
1•liyuanhao•32m ago•0 comments

Show HN: StockPortfolio.pro – portfolio tracker for long-term investors

https://www.stockportfolio.pro/
1•avisre•35m ago•0 comments

Record Number of Objects Launched into Space Last Year

https://e360.yale.edu/digest/2025-satellite-launches
1•speckx•35m ago•0 comments