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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!

Why Software Requirements Get Easier in an AI Economy

https://stng.substack.com/p/why-software-requirements-get-easier
1•matt_d•1m ago•0 comments

Show HN: Y – I made a Malleable coding agent app using Electron

https://github.com/y-times-y/y
1•HetPatel106•1m ago•0 comments

Get hired faster with data and AI tools to autofill and track

https://www.froghire.ai/
1•Rahul_Ubale•2m ago•0 comments

CISA now has full Mythos Preview access

https://www.nextgov.com/cybersecurity/2026/06/cisa-now-has-full-mythos-preview-access-people-fami...
2•Jimmc414•3m ago•0 comments

A free gift registry where the owner never sees who claimed what

https://giftgiving.fun/
1•dmcgahan•4m ago•0 comments

A Rust macros use case: Tightly-coupled API definitions for a client and server

https://adenalhardan.com/#rust-macros-client-server
1•adenalhardan•5m ago•0 comments

Show HN: Cruit.dev – Get hired at a startup based on your coding agent skills

https://cruit.dev
1•nwang783•6m ago•0 comments

Cheyenne OK's Microsoft Annexation, Rejects $50M Community Benefits Deal

https://cowboystatedaily.com/2026/06/23/cheyenne-oks-huge-microsoft-annexation-rejects-50m-commun...
1•andrekandre•7m ago•0 comments

Show HN: An eligibility agent focused on claims denials

https://www.substrateai.com/blog/introducing-the-substrate-eligibility-agent
1•kunle•8m ago•0 comments

Stop asking AI if your startup idea is good

https://www.idea-launch.io/learn/ai-idea-validator-vs-real-demand-signals
1•apsquared•10m ago•1 comments

Measuring Search Ranking Quality with LLM Judged NDCG

https://corvi.careers/blog/search-eval-llm-judges-ndcg/
2•sp1982•12m ago•0 comments

Americans Got Tricked into Using a Bank That Isn't a Bank [video]

https://www.youtube.com/watch?v=hiE7NvONU5U
1•mgh2•13m ago•0 comments

The Internet Isn't in the Cloud.It's on the Ocean Floor

https://axisbrief.substack.com/p/the-internet-isnt-in-the-cloud-its
2•Axis_Brief•16m ago•0 comments

Eruda – JavaScript Console

https://eruda.liriliri.io/docs/
1•razodactyl•18m ago•0 comments

FEXPRs vs. vtable: how LispE interpreter works

https://github.com/naver/lispe/wiki/2.7-FEXPR-vs.-vtable
1•birdculture•19m ago•0 comments

Prairieland Defendants Sentenced Today to Prison Terms Ranging from 30-100 Years

https://prairielanddefendants.com/press-release/eight-federal-prairieland-defendants-sentenced-to...
2•panic•22m ago•0 comments

Throwing My Roku in the Trash

https://www.coryd.dev/posts/2026/throwing-my-roku-in-the-trash
2•cdrnsf•23m ago•1 comments

GitKraken Unveils Code Flow to Help Teams Navigate the AI Era

https://sdtimes.com/softwaredev/gitkraken-unveils-code-flow-to-help-teams-navigate-the-ai-era/
2•doodlesdev•23m ago•0 comments

System prompt to defend against "Project 545" Generative Engine Optimization

https://pastebin.com/Z2cRVKXP
1•KoftaBob•24m ago•0 comments

Bicameral, Not Homoiconic

https://parentheticallyspeaking.org/articles/bicameral-not-homoiconic/
1•andsoitis•26m ago•0 comments

Vulnerability Reports are not Special Anymore

https://words.filippo.io/vuln-reports/
3•goranmoomin•34m ago•0 comments

FAA awards software and AI contract as part of air traffic control modernization

https://www.nextgov.com/acquisition/2026/06/faa-awards-software-and-ai-contract-part-air-traffic-...
1•WaitWaitWha•38m ago•0 comments

House passes bill to lower housing costs, sending it to Trump's desk

https://www.nbcnews.com/politics/congress/house-passes-sweeping-bill-lower-housing-costs-sending-...
3•toomuchtodo•38m ago•3 comments

AI systems out-persuade expert humans

https://arxiv.org/abs/2606.16475
1•marojejian•40m ago•2 comments

Russia forces universities to teach drone warfare from September 2026

https://mezha.net/eng/bukvy/c3b94111_russia_forces_universities/
2•gnabgib•40m ago•0 comments

Reinforcement learning towards broadly and persistently beneficial models

https://alignment.openai.com/beneficial-rl/
1•vesteny77•45m ago•0 comments

The Secret Life of Circuits by Michal Zalewski (lcamtuf)

https://nostarch.com/secret-life-of-circuits
1•Curiositry•45m ago•0 comments

Russian Warship RIP – Tracking Losses

https://russianwarship.rip/en
2•sans_souse•46m ago•0 comments

Talk to Your Plant

https://github.com/openai/planttalk
2•bakigul•47m ago•0 comments

Let's say you're hungry for a sandwich

https://beige.party/@Lana/116795397010653803
3•colinprince•47m ago•0 comments