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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!

UK Government Goes All-In on Digital Surveillance, Censorship and Control

https://www.nakedcapitalism.com/2026/06/the-uks-most-unpopular-government-on-record-just-went-all...
1•boticello•1m ago•0 comments

Software Is Not a Single-Player Game

https://www.davidpoll.com/2026/06/software-is-not-a-single-player-game/
1•depoll•1m ago•0 comments

How to Demolish a Bridge [video]

https://www.youtube.com/watch?v=7oi4yMr8Rjk
1•mhb•6m ago•0 comments

Ten Years of Just (and Lists)

1•rodarmor•7m ago•0 comments

Seattle Underground

https://en.wikipedia.org/wiki/Seattle_Underground
1•axelfontaine•10m ago•0 comments

AMD Pulls Memory Encryption from Ryzen CPUs

https://www.technology.org/2026/06/16/amd-strips-memory-encryption-consumer-ryzen-cpus/
2•KAMSPioneer•11m ago•0 comments

Update: Acabei de abrir O SDK no GitHub → github.com/mathhMadureira/orka

1•matteusmadu•12m ago•0 comments

The Battle with Anthropic Is the Start of a New Kind of Conflict

https://www.nytimes.com/2026/06/16/opinion/anthropic-fable-ai-trump-administration.html
1•furcyd•15m ago•0 comments

I built a fail-closed execution gate for AI agents

https://kronyqldemo.netlify.app/demo/ase-proof
1•Auditome•15m ago•0 comments

Total Iran Economic Damage Estimate

https://www.fdd.org/analysis/2026/04/23/total-iran-economic-damage-estimate/
1•littlexsparkee•17m ago•0 comments

Qode – The first AI agent that can generate 50k line codebases in one prompt

https://github.com/akshaylakkur/Q
1•akshayl284•18m ago•1 comments

Silicon Motion exec: Retail SSD market has almost disappeared

https://www.tomshardware.com/pc-components/ssds/the-retail-ssd-market-has-almost-disappeared-says...
6•Lihh27•23m ago•0 comments

Guardrails for Reuse in AI from ClimateSOS Foundational Charter

1•safiume•23m ago•0 comments

An Interview with Eugene Jarvis of Robotron, Defender and Stargate Fame

https://www.gamedeveloper.com/production/eugeneology-an-interview-with-eugene-jarvis
1•evo_9•26m ago•0 comments

VibeThinker-3B achieves 80.2 on LCBv6

https://twitter.com/WeiboLLM/status/2066870851841274249
3•moondistance•28m ago•1 comments

Mathup

https://mathup.xyz/
1•runarberg•28m ago•0 comments

GLM-5.2: Frontier Intelligence, Open Weights

https://twitter.com/Zai_org/status/2066938937344495629
5•zixuanlimit•29m ago•0 comments

Hacking group claims major hack of Novo Nordisk and attempted $25M extortion

https://www.reuters.com/legal/government/hacking-group-claims-major-hack-novo-nordisk-attempted-2...
3•nnmg•29m ago•0 comments

Anthropic "pauses" token-based billing for its Claude Agent SDK

https://arstechnica.com/ai/2026/06/anthropic-pauses-token-based-billing-for-its-claude-agent-sdk/
3•cdrnsf•30m ago•0 comments

The Context Moat

https://richard.dulude.vc/fieldnotes/the-context-moats
1•AnhTho_FR•31m ago•0 comments

5 Stages of a Domain Expiration

https://medium.com/@thesuperrepemail/the-5-stages-of-a-domain-expiration-e1653544c605
1•mssblogs•31m ago•0 comments

What is the most intense way to learn something?: On giving talks

https://chillphysicsenjoyer.substack.com/p/what-is-the-most-intense-way-to-learn
2•crescit_eundo•32m ago•0 comments

Hiring Founding Engineer Roles

https://www.flynavi.com/careers
1•flyingforreal•33m ago•1 comments

When Content Costs Nothing

https://steelmill.substack.com/p/when-content-costs-nothing
1•AzariaK•34m ago•0 comments

Linux 7.1 is here to end the Intel 486 era – and do some serious legacy clean up

https://www.zdnet.com/article/say-goodbye-to-486-processors-linux-7-1-lands/
4•CrankyBear•34m ago•0 comments

Trump administration won't allow G7 member countries to regain access to Fable

https://twitter.com/AndrewCurran_/status/2066925774498910592
2•Filligree•35m ago•0 comments

Nixpkgs Cooldowns

https://determinate.systems/blog/nixpkgs-cooldown/
2•nicksergeant•37m ago•0 comments

From abandoned gaming PC to 14 minute K8s cluster provisioning

https://www.droppedasbaby.com/posts/hl1/
1•offbyone42•38m ago•0 comments

Fable 5 back? 44 delivery channels carrier pigeon included- RFC 2549,3–5 day SLA

https://isfable5available.com/
1•bArmageddon•39m ago•1 comments

Asked Fable to Make the Backrooms

https://backrooms.mom/
2•bxclltkfz•40m ago•0 comments