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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!

I moved my digital stack to Europe

https://monokai.com/articles/how-i-moved-my-digital-stack-to-europe/
1•monokai_nl•12s ago•0 comments

How A.I. Killed Student Writing (and Revived It)

https://www.nytimes.com/2026/04/30/us/ai-students-cheating-homework-classrooms.html
1•apparent•1m ago•0 comments

Show HN: Trip – a complete transformer engine in C built from scratch just by me

https://github.com/carlovalenti/TRiP
1•carlovalenti•1m ago•0 comments

Judge Orders Matt Mullenweg to Explain Missing Messages in WP Engine Dispute

https://www.therepository.email/federal-judge-orders-matt-mullenweg-to-explain-missing-messages-i...
1•docdeek•2m ago•0 comments

The Bloomberg Terminal Is Getting an AI Makeover, Like It or Not

https://www.wired.com/story/the-bloomberg-terminal-is-getting-an-ai-makeover-like-it-or-not/
1•01-_-•2m ago•0 comments

Non-Programmer Code Sharing

1•CombatHacker•3m ago•0 comments

Revealing NVIDIA Driver Command Streams for CPU-GPU Runtime Behavior Insight

https://arxiv.org/abs/2604.26889
1•matt_d•3m ago•0 comments

AI optimism is waning

https://bayeslord.substack.com/p/ai-optimism-is-waning
2•swah•4m ago•0 comments

Guardians: Static verification for AI agent workflows

https://github.com/metareflection/guardians
1•matt_d•5m ago•0 comments

CopyFail Was Not Disclosed to Distros

https://www.openwall.com/lists/oss-security/2026/04/30/10
3•ori_b•6m ago•0 comments

Show HN: I built a private GitHub in 650 lines of PostgreSQL

https://github.com/calebwin/gitgres
1•calebhwin•7m ago•0 comments

AI Investment Boosted Economic Growth, While Consumers Tapped the Brakes

https://www.wsj.com/economy/central-banking/u-s-economy-grew-at-2-rate-in-first-quarter-6e0c18cc
1•JumpCrisscross•8m ago•0 comments

Show HN: Larkin – Authorization middleware for x402 agent payments

https://larkin.sh
1•mikebom•8m ago•0 comments

Vision agents vs. structured APIs on the same internal tool task

2•FirestarAlpha•8m ago•0 comments

The Whistleblower Who Uncovered the NSA's 'Big Brother Machine'

https://thereader.mitpress.mit.edu/the-whistleblower-who-uncovered-the-nsas-big-brother-machine/
3•the-mitr•8m ago•0 comments

Xatastor: ZFS and NVMe-Of for Postgres Databases

https://xata.io/blog/xatastor-zfs-nvme-of-for-millions-of-postgres-databases
2•tee-es-gee•10m ago•0 comments

Fast GPU Linear Algebra via Compile Time Expression Fusion

https://arxiv.org/abs/2604.22242
1•matt_d•11m ago•0 comments

American Dads Became the Parents Their Fathers Never Were

https://www.derekthompson.org/p/why-do-richer-dads-spend-more-time
1•ozozozd•11m ago•0 comments

Command Decision System for organizational risk (not average-based)

https://github.com/knuppjason-source/Human-Factors-App
1•Knuppjason•12m ago•0 comments

Show HN: Phase Router – capacity-aware routing for MoE

https://github.com/TSltd/phase_router_rs
1•TSltd•12m ago•0 comments

Largest Digital Human Rights Conference Suddenly Canceled

https://www.404media.co/rightscon-human-rights-conference-suddenly-postponed/
6•Brajeshwar•13m ago•0 comments

Long-Running Agents

https://addyo.substack.com/p/long-running-agents
3•swolpers•15m ago•1 comments

Maximilian Schwarzmüller – GitHub is facing problems [video]

https://www.youtube.com/watch?v=pekbl3Yz02g
1•mindcrime•16m ago•0 comments

Constraints That Compute: A Unified Framework for Efficient Intelligence

https://zenodo.org/records/19895574
1•massimiliano_c•16m ago•0 comments

Dotcl: Common Lisp Implementation on .NET

https://github.com/dotcl/dotcl
6•reikonomusha•16m ago•0 comments

Illegal vs. Unwanted States

https://buttondown.com/hillelwayne/archive/illegal-vs-unwanted-states/
2•azhenley•17m ago•0 comments

SatoshiGuesser – Roll for Bitcoin

https://github.com/Pathos0925/SatoshiGuesser
11•ilarum•19m ago•3 comments

China pushes EU capitals to scrap 'Made in Europe' law or face retaliation

https://www.euronews.com/my-europe/2026/04/29/china-pushes-eu-capitals-to-scrap-made-in-europe-la...
4•Teever•23m ago•1 comments

A text editor as a user interface

https://ratfactor.com/cards/text-editor-as-ui
1•ibobev•24m ago•0 comments

Nvidia Nemotron 3 Nano Omni

https://huggingface.co/blog/nvidia/nemotron-3-nano-omni-multimodal-intelligence
1•ibobev•25m ago•0 comments