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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!

Show HN: Voice AI Toys on ESP32 with Cloudflare Durable Objects

https://github.com/akdeb/ElatoAI/tree/main/server/cloudflare
1•akadeb•1m ago•0 comments

Change management problem rarely mentioned when pushing AI to engineering teams

https://shiftmag.dev/as-an-engineering-manager-i-couldnt-ignore-ai-if-my-teams-are-to-survive-9061/
1•cyberkoza•2m ago•1 comments

Cerebras S-1

https://www.sec.gov/Archives/edgar/data/2021728/000162828026025762/cerebras-sx1april2026.htm
2•herpderperator•3m ago•0 comments

Why, After All These Years, MZI-Based Transistorlessness Might Be Here

https://write.as/mnggfj7asl07k
1•rbanffy•4m ago•0 comments

Opinion 195

https://sites.math.rutgers.edu/~zeilberg/Opinion195.html
1•paulpauper•5m ago•0 comments

The N.Y.P.D. Is Teaching America How to Track Everyone Every Day Forever

https://www.nytimes.com/interactive/2025/09/15/opinion/nypd-surveillance.html
1•Cider9986•5m ago•0 comments

The Arctic's growing mosquito problem

https://www.science.org/doi/10.1126/science.aeh9505
1•ChrisArchitect•5m ago•0 comments

Meta targets May 20 for first wave of layoffs; additional cuts later in 2026

https://www.reuters.com/world/meta-targets-may-20-first-wave-layoffs-additional-cuts-later-2026-2...
3•fvrghl•7m ago•1 comments

Listening in on the brain's electrical conversations with better tools

https://medicalxpress.com/news/2026-03-brain-electrical-conversations-tools.html
1•PaulHoule•10m ago•0 comments

Show HN: Jean2 – An Open-Source Agent You Assemble Like Lego

https://github.com/rabbyte-tech/jean2
1•danielbilekq•11m ago•1 comments

Sam Altman Is Dangerously Disconnected from Reality

https://weaponizedspaces.substack.com/p/sam-altman-is-dangerously-disconnected
2•rbanffy•12m ago•0 comments

Composing a Search Engine

https://exa.ai/blog/composing-a-search-engine
1•metadat•12m ago•0 comments

What if database branching was easy?

https://xata.io/blog/what-if-database-branching-was-easy
1•tee-es-gee•15m ago•0 comments

Dennis Ritchie's PhD Dissertation [pdf]

https://archive.computerhistory.org/resources/access/text/2020/05/102790971/Ritchie_dissertation.pdf
2•keepamovin•15m ago•0 comments

Two Motorola Transistors Became the Default NPNs

https://www.allaboutcircuits.com/news/how-two-motorola-transistors-became-the-worlds-default-npns/
1•ChuckMcM•17m ago•1 comments

Nature is our source of randomness: on the death of Michael O. Rabin

https://www.heise.de/en/news/Nature-is-our-source-of-randomness-on-the-death-of-Michael-O-Rabin-1...
1•rbanffy•17m ago•0 comments

Should you feed child guests dinner?

https://theconversation.com/should-you-feed-child-guests-dinner-what-swedengate-tells-us-about-fo...
1•sigma5•18m ago•2 comments

Breakthrough takes big step toward safe, reversible male contraception

https://news.cornell.edu/stories/2026/04/breakthrough-takes-big-step-toward-safe-reversible-male-...
2•thunderbong•18m ago•0 comments

The Linux Slayers: Office, Photoshop, and AutoCAD

https://hajo.me/blog/2026/04/17/the-linux-slayers-office-photoshop-autocad/
1•fxtentacle•18m ago•0 comments

Zymacs on Writing .gitignore Files

https://zymacs.github.io/
2•kernzistor45•24m ago•0 comments

FP-DSS: Floating Point Divider State Sampling

https://roots.ec/blog/fpdss
1•ledoge•26m ago•0 comments

Ask HN: What's the most profitable SaaS in this decade?

1•wasimsk•26m ago•1 comments

Carleton College Cookie House

https://www.nytimes.com/2026/04/17/dining/carleton-college-minnesota-cookie-house.html
1•js2•26m ago•1 comments

Turn a Kindle ASIN export into an Audible wishlist, automatically

https://github.com/hokocodes/kindle-to-audible
1•hokole•27m ago•0 comments

Machine Generated and Checked Proofs for a Verified Compiler (Experience Report)

https://arxiv.org/abs/2602.20082
1•matt_d•28m ago•0 comments

Rostra – P2P Social Network

https://rostra.me/
2•janandonly•28m ago•0 comments

A Common MVP Evolution: Service to System Integration to Product

https://www.skmurphy.com/blog/2017/08/07/a-common-evolution-service-to-system-integration-to-prod...
1•skmurphy•29m ago•1 comments

Up to 8M Bees Are Living in an Underground Network Beneath This Cemetery

https://www.discovermagazine.com/up-to-8-million-bees-are-living-in-an-underground-network-beneat...
1•janandonly•30m ago•0 comments

Stalwart-Sentinel – A physics-based logic gate to stop AI hallucinations

https://github.com/taxischramm347-pixel/Stalwart-Sentinel-MVP-/tree/main
1•taxi347•32m ago•0 comments

Sell your private code to the big labs

https://hashseatic.com/
1•mpcadosch•33m ago•0 comments