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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: Forecastion – A forecasting workbench for analysts and operators

https://forecastion.com/
1•PrimeMentat•1m ago•0 comments

Anthropic build AI so safe the Gov made them delete it (YouTube) – Patrick Boyle

https://www.youtube.com/watch?v=AJP6K2_rr90
1•ziptron•5m ago•0 comments

Why do developers choose one programming language over another? (2002)

https://web.archive.org/web/20020803183731/http://www.joelonsoftware.com/news/20020505.html
1•tosh•9m ago•0 comments

Show HN: FOSS sandbox platform that hides infra secrets from devs and AI agents

https://github.com/octelium/cordium
1•geoctl•10m ago•0 comments

Pandas vs. DuckDB vs. Polars: 20M rows, 10 operations, benchmarked

https://thedatabytes.substack.com/p/pandas-vs-duckdb-vs-polars-i-ran
1•badhayaru•10m ago•0 comments

The Emerging AI Governance Space

https://www.threedeep.tech/ai-governance-stack
1•ethigent•10m ago•0 comments

Show HN: Criterion Closet as a website – pull any of 1,247 films off the shelf

https://the-criterion-closet.vercel.app
1•olievans•11m ago•0 comments

The Agentic Resource Discovery Specification

https://developers.googleblog.com/announcing-the-agentic-resource-discovery-specification/
2•simonpure•14m ago•0 comments

Gotique – AI that gives a first-read appraisal on antiques from photos

https://gotique.ai/en/community
2•gotique•16m ago•0 comments

Five Worlds (2002)

https://www.joelonsoftware.com/2002/05/06/five-worlds/
2•tosh•17m ago•0 comments

Two production Next.js apps, built solo with Cursor+Claude, $13,945

https://technicalstrat.com/articles/enterprise-app-vibecode-recipe
4•matttek•18m ago•0 comments

Getting over Your Skills Issues

https://theoryvc.com/blog
2•sambcui•22m ago•0 comments

India Calls in Military, Blocks Telegram App to Lock Down College-Entrance Exam

https://www.wsj.com/world/india/india-calls-in-military-blocks-app-to-lock-down-college-entrance-...
4•bookofjoe•23m ago•1 comments

Changes that cut our LLM pipeline costs more than model-switching did

2•Abbas_Maka•23m ago•0 comments

Ag.ide Index, rank, and refactor your repo's worst code

https://agide.dev/
2•navs•24m ago•0 comments

Most Affordable Cities to Buy a Home

https://wallethub.com/edu/most-affordable-cities-for-home-buyers/121950
4•panny•43m ago•2 comments

Convert your landing pages to powerful visuals for social media

3•umeshmr•44m ago•0 comments

The IPv4 Parser AI Couldn't Have Written

https://extractingcycles.com/blog/the-ipv4-parser-ai-couldnt-have-written/article/
4•csno•46m ago•0 comments

The ERoadBook – Rally-Inspired GPS Device for Riders and Adventurers [video]

https://www.youtube.com/watch?v=1KoQ-l3-tg8
3•arbayi•46m ago•0 comments

The Music Industry is broken (by Drew Gooden) [video]

https://www.youtube.com/watch?v=Yx7baJMQuVA
2•Imustaskforhelp•48m ago•0 comments

Longterm use of intracortical brain–computer interface for speech&cursor control

https://www.nature.com/articles/s41591-026-04414-6
3•bookofjoe•54m ago•0 comments

Looking Ahead to Postgres 19

https://www.snowflake.com/en/blog/engineering/postgresql-19-features-beta/
2•plaur782•54m ago•0 comments

How Russia's Skyfall Nuclear-Powered Cruise Missile Works

https://www.twz.com/nuclear/here-how-russias-skyfall-nuclear-powered-cruise-missile-actually-works
4•pcestrada•56m ago•0 comments

Using an iPad Pro as a Laptop

https://justingarrison.com/blog/2026-06-20-ipad-laptop/
3•wrxd•57m ago•1 comments

A 3D cube written in JSX and CSS running natively at 60 FPS on a $3 MCU [video]

https://www.youtube.com/watch?v=pC3kNSWaL18
1•arbayi•58m ago•0 comments

The Early Days: The History of Interactive Computing

https://obsolescence.dev/interactive-computing-history.html
1•rbanffy•1h ago•0 comments

A Microsoft product from June 1979 led to the IBM PC

https://dfarq.homeip.net/how-a-microsoft-product-from-june-1979-led-to-the-ibm-pc/
1•rbanffy•1h ago•0 comments

Scheduled Tasks in ChatGPT

https://help.openai.com/en/articles/10291617-scheduled-tasks-in-chatgpt
1•khutorni•1h ago•0 comments

Show HN: AlphaVibe – AI that reads your DeFi wallet live via DeBank

https://quantarena.xyz/
2•denis4inet•1h ago•0 comments

"China Outpacing Us on AI": Why Musk Bought an Autonomous Coding Startup

https://en.sedaily.com/technology/2026/06/20/china-outpacing-us-on-ai-why-musk-bought-an-autonomous
2•modinfo•1h ago•0 comments