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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!

I'm 19 and built an AI golf swing analyzer with on-device CoreML

https://apps.apple.com/us/app/the-swing-sensei/id6759412468
1•TheSwingSensei•39s ago•0 comments

iOS 26.6 adds new alert when you try blocking too many contacts

https://9to5mac.com/2026/05/26/ios-26-6-adds-new-alert-when-you-try-blocking-too-many-contacts/
1•cdrnsf•52s ago•0 comments

The Nation-State Is a Legacy System. Time for an Upgrade

https://gccsproject.pages.dev/
1•pear01•1m ago•0 comments

Encrypted DNS in 2026: DoH, DoT and DoQ compared with real benchmarks

https://www.copahost.com/blog/encrypted-dns/
1•ggallas•3m ago•0 comments

The worst job interview I ever had

https://www.oliverio.dev/blog/the-worst-job-interview-i-had
1•oliverio•3m ago•0 comments

Being a 1.5-10x Developer

https://build.ms/2026/5/26/being-a-1-5-10x-developer/
1•mergesort•3m ago•0 comments

6M Fake GitHub Stars: How to Vet Open-Source AI Tools

https://www.chatgpt.ca/blog/github-fake-stars-ai-tool-evaluation
1•b-man•4m ago•0 comments

Mysteries of the Griffin iMate

https://www.projectgus.com/2023/04/griffin-imate/
1•geerlingguy•7m ago•0 comments

The Computer That Was Too Advanced for Its Own Good [video]

https://www.youtube.com/watch?v=OWPnEDXVTl8
3•devonnull•8m ago•0 comments

Optimization Constants in Mathematics

https://teorth.github.io/optimizationproblems/
1•bmc7505•13m ago•0 comments

GitHub Classroom sign-ups are no longer available

https://github.blog/changelog/2026-05-26-github-classroom-sign-ups-are-no-longer-available/
2•DropDead•15m ago•0 comments

Analyst on China's spent rocket stages: "Things only continue to get worse"

https://arstechnica.com/space/2026/05/analyst-on-chinas-spent-rocket-stages-things-only-continue-...
3•xoa•16m ago•0 comments

Tracing libjxl decoding patterns, with JPEG XL as the trace data container

https://ender672.github.io/posts/2026-05-26-tracing-libjxl-decoding-patterns/
1•ender672•16m ago•0 comments

Why LLMs will be always Terrible at Software Architecture

https://devforth.io/insights/why-llms-will-be-always-terrible-at-software-architecture/
3•dotnot•16m ago•0 comments

Co-Invest – an MCP server that lets Claude and ChatGPT execute real trades

https://www.liquid.trade/coinvest
2•miwooyork•16m ago•0 comments

Ask HN: How do you model temporarily invalid data structures

1•escot•18m ago•0 comments

Sinclair-O-Matic

https://dpt.github.io/SinclairLogo/
2•worik•19m ago•0 comments

Show HN: Privacy-first notification blocker for Android ad-free

https://permly.app
1•Zartof•20m ago•0 comments

Collection of free online tools for developers

https://webdevpack.com/
1•ivopetkov•20m ago•0 comments

Show HN: ARQ Dashboard – web and TUI monitoring for Python's ARQ job queue

https://github.com/srijanpatel/arq-dashboard
1•spps11•20m ago•0 comments

Startup is betting India's gig economy can train the robots

https://techcrunch.com/2026/05/26/human-archive-taps-into-indias-services-startups-to-collect-dat...
1•methuselah_in•21m ago•0 comments

Jumping Spiders Seem to Dream

https://www.pnas.org/doi/10.1073/pnas.2204754119
2•jyounker•22m ago•0 comments

Kubernetes in Anger

https://samof76.space/kubernetes-in-anger.html
2•sharjeelsayed•23m ago•0 comments

Why is Europe the fastest warming continent?

https://phys.org/news/2026-05-europe-world-fastest-continent.html
10•geox•25m ago•0 comments

Plowshares or nuclear explosions for the national economy

https://annasofialesiv.substack.com/p/plowshares
2•bilsbie•30m ago•0 comments

Stop Doing Easy Things

https://xendo.bearblog.dev/stop-doing-easy-things/
4•xendo•31m ago•0 comments

The Universe is a Sheet of Paper (and Some Sand)

https://t3db0t.substack.com/p/the-universe-is-a-sheet-of-paper
3•virgil_disgr4ce•33m ago•0 comments

DeepSWE: A contamination-free benchmark for long-horizon coding agents

https://deepswe.datacurve.ai/blog
4•ammar_x•33m ago•1 comments

DeepSWE Benchmark

https://deepswe.datacurve.ai/
2•xfax•36m ago•0 comments

Hedge Funds Are AImaxxing

https://www.ft.com/content/66fc88ec-af0d-452f-a535-193d9d5279f8
5•johnbarron•36m ago•0 comments