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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!

The Art of Insight in Science and Engineering – Mastering Complexity(2014) [pdf]

https://ocw.mit.edu/courses/res-6-011-the-art-of-insight-in-science-and-engineering-mastering-com...
1•nill0•3m ago•0 comments

SIMD Vectors in the HotSpot JVM [video]

https://www.youtube.com/watch?v=KpCz6UtViEo
1•tosh•6m ago•0 comments

Kimi K3 is top-tier at cybersecurity

https://twitter.com/rauchg/status/2078647648307880209
2•tosh•8m ago•0 comments

Show HN: PilotCite – Monitor how AI platforms cite and describe your brand

https://www.pilotcite.com
1•standew•12m ago•0 comments

CARE

https://en.wikipedia.org/wiki/CARE_International
1•tosh•14m ago•0 comments

Rise of delivery apps takes a bite out of sales for Big Pizza

https://www.ft.com/content/d10e846e-5615-4cb5-bd4f-b159423d4f75
1•thm•17m ago•0 comments

Beyond Bioinformatics Rewrites

https://claymcleod.dev/blog/2026-07-13-beyond-bioinformatics-rewrites
1•azhenley•19m ago•0 comments

Skyroot Vikram-1 India's First Private Orbital Rocket Launch [video]

https://www.youtube.com/watch?v=2KKZbSX9SgI
1•AareyBaba•22m ago•0 comments

Motion Sensors and Home Security Gadgets Without Cameras

https://www.wired.com/story/best-motion-sensors-private-alternatives-security/
1•joozio•28m ago•0 comments

AI Agents for the Working Mathematician

https://chaoxu.prof/posts/2026-07-18-ai-agents-for-the-working-mathematician.html
2•chaoxu•31m ago•0 comments

Martin Picard's Mitochondrial Theory of Mind

https://www.quantamagazine.org/martin-picards-mitochondrial-theory-of-mind-20260717/
1•Michelangelo11•33m ago•0 comments

Visualizing how multimodal vector search works under the hood

https://github.com/Faizan711/multimodal-search
1•Faizan711•34m ago•0 comments

Why Narcissistic Leaders Resist Remote Work

https://www.sciencedirect.com/science/article/pii/S0749597826000300#kg005
2•ziptron•34m ago•1 comments

UK to Scrap Digital ID

https://www.bbc.co.uk/news/articles/c5y08z25q8eo
3•i-am-cjc•35m ago•0 comments

ACI – The Open Standard for Autonomous Companies

https://github.com/narko4u/aci-spec
1•EddieWade•41m ago•0 comments

Show HN: FlexInference LLM Router

https://www.flexinference.com
1•Aperswal•45m ago•0 comments

Are your teams running out of GitHub Copilot credits?

https://nstech.substack.com/p/are-your-teams-running-out-of-github
3•sriram_iyengar•54m ago•0 comments

Ask HN: How do you as a normal swe use AI?

2•atworkc•55m ago•0 comments

Dave Eggers told OpenAI staff that ChatGPT was 'silencing a generation'

https://www.theverge.com/ai-artificial-intelligence/967630/dave-eggers-openai-chatgpt-silencing-a...
3•littlexsparkee•57m ago•0 comments

Show HN: CodeKitHub – Free browser-based tools, files never leave your device

https://codekithub.com/en/
1•qiaobax•58m ago•0 comments

Facefinder

https://face-finder.org
1•thefirstname322•1h ago•0 comments

Controlling Reasoning Effort in LLMs

https://magazine.sebastianraschka.com/p/controlling-reasoning-effort-in-llms
1•vismit2000•1h ago•0 comments

We are entering the graph engineering phase

https://www.drjoshcsimmons.com/writing/we-are-entering-the-graph-engineering-phase
1•joshcsimmons•1h ago•0 comments

Tooly – Local JSON, YAML, CSV and Regex Tools

https://www.tooly.one/
1•hengery•1h ago•0 comments

Proof of Fermat Last Theorem from Scratch

https://www.youtube.com/watch?v=9f-hGSh8lF0
1•E-Reverance•1h ago•0 comments

India's Skyroot launches Vikram-1 in first private orbital rocket mission

https://www.reuters.com/science/indias-skyroot-launches-vikram-1-first-private-orbital-rocket-mis...
2•SilverElfin•1h ago•0 comments

The cost of the night shift and how to sleep it off

https://www.bbc.co.uk/news/articles/cp9errxl97go
1•mmarian•1h ago•0 comments

The Case for Systems Engineering in the Agentic Era

https://goyalankit.com/blog/the-case-for-systems-engineering-in-the-agentic-era
1•goyalankit•1h ago•0 comments

Fastest Lego Autoclicker (2025) [video]

https://www.youtube.com/watch?v=JmQeSDkcNjc
1•mot2ba•1h ago•0 comments

Show HN: Voice chat in a nostalgic private lobby

https://thepregamelobby.com/
1•gpsmsn•1h ago•0 comments