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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•11mo 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!

Four Choppers and a Blimp: The Piasecki Helistat

https://hackaday.com/2026/04/14/four-choppers-and-a-blimp-the-bizarre-piasecki-helistat/
3•devonnull•49s ago•0 comments

My first project ever. A platform built with AI

https://www.ugcfinder.website/
1•aiamed•2m ago•1 comments

Superintelligent Will (2012) [pdf]

https://nickbostrom.com/superintelligentwill.pdf
1•rappatic•3m ago•0 comments

The AI backlash is turning revolutionary (Fortune)

https://fortune.com/2026/04/14/ai-backlash-revolutionary-sam-altman-molotov-cocktails-data-centers/
1•nickvec•5m ago•1 comments

No one can force me to have a secure website

https://tom7.org/httpv/
4•vanyle•8m ago•0 comments

TaskRabbit founder: the pivot is the point

https://www.fastcompany.com/91513007/taskrabbit-founder-the-pivot-is-the-point-pivot-founders-bui...
1•doctaj•10m ago•0 comments

Secure private networking for users, nodes, agents, Workers – Cloudflare Mesh

https://blog.cloudflare.com/mesh/
2•cantaloupe•19m ago•1 comments

Contra Byrnes on UV and Cancer

https://hedonicescalator.substack.com/p/contra-byrnes-on-uv-and-cancer
2•paulpauper•20m ago•0 comments

Race for the best cybersecurity model heating up

https://www.reuters.com/technology/openai-unveils-gpt-54-cyber-week-after-rivals-announcement-ai-...
1•gaurangt•20m ago•0 comments

What Claude Code's Source Revealed About AI Engineering Culture

https://techtrenches.dev/p/the-snake-that-ate-itself-what-claude
1•lucketone•23m ago•0 comments

Why Affordability Isn't the Same as Falling Prices

https://www.urbanproxima.com/p/why-affordability-isnt-the-same-as
1•paulpauper•23m ago•0 comments

Show HN: We fine-tuned an AI model for log search – Accuracy 50% to 80%

https://thedex.run/blog/why-general-purpose-ai-fails-at-log-search
1•rkorlimarla•25m ago•0 comments

Show HN: GizmoSauce – no-code website widgets

https://demo.gizmosauce.com/demos/little-caesars/
1•endurant_dev•25m ago•0 comments

GitHub webhook secrets leaked in headers

https://gist.github.com/ltrgoddard/7abfc8e4123e403505dfbe767a2487ab
1•ltrg•25m ago•1 comments

Gemini Plugin for Claude Code

https://github.com/sakibsadmanshajib/gemini-plugin-cc
1•sakibss•26m ago•0 comments

Painful learnings from sponsoring a tech conference in SF

https://www.terezatizkova.com/writing/conference-booths
2•tizkovatereza•27m ago•1 comments

Civilization Is Not the Default. Violence Is

https://apropos.substack.com/p/civilization-is-a-public-good
14•paulpauper•27m ago•3 comments

MetaBrainz is looking for a new executive director

https://blog.metabrainz.org/2026/04/14/seeking-a-new-executive-director/
1•MrKomodoDragon1•30m ago•0 comments

Overcoming OSS Contribution Anxiety

https://ym2132.github.io/vllm_make_awq_models_work_batch_invariance.html
1•Two_hands•31m ago•0 comments

Dark matter could be black holes from a different universe

https://theconversation.com/could-dark-matter-be-made-of-black-holes-from-a-different-universe-27...
2•samizdis•31m ago•0 comments

H.R.8250 – To require operating system providers to verify the age of any user

https://www.congress.gov/bill/119th-congress/house-bill/8250/all-info
32•cft•32m ago•9 comments

ChatGPT, make me a corporate takeover strategy

https://twitter.com/_nathancalvin/status/2044071303968145806
1•yoyohello13•35m ago•0 comments

Cement firm Lafarge found guilty of financing terrorism in Syria

https://www.swissinfo.ch/eng/various/cement-firm-lafarge-found-guilty-of-financing-terrorism-in-s...
2•Teever•35m ago•0 comments

I asked Claude how it wants to browse the web. It built LAD (LLM-as-DOM)

https://github.com/menot-you/llm-as-dom
1•tiago-im•36m ago•0 comments

Why I'm selling all my real estate – by Graham Stephan

https://grahamstephan.substack.com/p/im-selling-everything
1•bilsbie•38m ago•1 comments

BridgeBase – A Quantum-Safe Gateway for AI Agents (ML-KEM-768)

https://pqc-gateway-production.up.railway.app/
1•huzaiiiiiiiii•39m ago•0 comments

Have attendees wear your startup's merch at YC Startup School India

https://www.surfacearea.shop/
4•demod6•40m ago•1 comments

Hodor: a simple knowledge base for security and trust and safety

https://github.com/bq33/HODOR
1•33bquinn•42m ago•1 comments

The Secret Language of Ships

https://hakaimagazine.com/videos-visuals/the-secret-language-of-ships/
2•bookofjoe•44m ago•0 comments

The $10k-a-year college education has arrived (1981)

https://www.nytimes.com/1981/02/19/nyregion/the-10000-a-year-college-education-has-arrived.html
1•downbad_•45m ago•1 comments