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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!

Eratosthenes

https://en.wikipedia.org/wiki/Eratosthenes
1•helterskelter•1m ago•0 comments

Long-term lithium treatment is associated with longer leukocyte telomeres (2013)

https://pubmed.ncbi.nlm.nih.gov/23695236/
1•helterskelter•3m ago•0 comments

Show HN: AutoLISP in Rust/WASM, reused to script GLDF and IFC file formats

https://gldf.icu
1•holg•3m ago•0 comments

Recursion got into programming: a tale of intrigue (2014)

https://vanemden.wordpress.com/2014/06/18/how-recursion-got-into-programming-a-comedy-of-errors-3/
1•downbad_•4m ago•0 comments

A man with ALS is "the first power user" of a brain implant that lets him sp

https://www.technologyreview.com/2026/06/15/1138953/man-als-first-power-user-brain-implant-speak-...
1•joozio•4m ago•0 comments

Ask HN: Specialization to stay relevant in the age of AI

1•WhyIsItAlwaysHN•4m ago•0 comments

Ask HN: Can you stay relevant against AI via specialization

1•WhyIsItAlwaysHN•5m ago•0 comments

How Anthropic trained Fable 5 => by analysing its reasoning traces

https://ankitmaloo.com/fable/
2•ankit219•5m ago•0 comments

The SDK Is for Developers. The MCP Server Is for Agents

https://blog.bridgexapi.io/the-sdk-is-for-developers-the-mcp-server-is-for-agents
2•Bridgexapi•8m ago•0 comments

Scaling Security Insights at Cloudflare

https://blog.cloudflare.com/scaling-security-scans/
1•FlyingSnake•8m ago•0 comments

Can Compute Commoditize If It's Not Fungible?

https://davefriedman.substack.com/p/can-compute-commoditize-if-its-not
1•gmays•9m ago•0 comments

Programming Language Design and Implementation (PLDI) 2026 Live Streams

https://pldi26.sigplan.org/attending/live-streams
2•matt_d•9m ago•0 comments

Show HN: Micro Coach – an AI workout planner built by a former personal trainer

https://microcoachapp.com/
1•coreysutton7•9m ago•0 comments

Over the Hill Preview: Virtual Off-Roading That Will Lower Your Blood Pressure

https://www.thedrive.com/news/over-the-hill-preview-virtual-off-roading-that-will-lower-your-bloo...
1•cf100clunk•10m ago•0 comments

Show HN: I built a tool to consolidate common domain security checks

https://swissarmytechtools.com/domain-intelligence-scanner/
1•py93•10m ago•0 comments

Stack Overflow Is Being Reborn as a Back-End Service for AI Agents

https://devops.com/stack-overflow-is-being-reborn-as-a-back-end-service-for-ai-agents/
2•CrankyBear•12m ago•0 comments

Show HN: Honeytree – grow a terminal forest that plants real trees as you code

https://github.com/Varun2009178/honeytree
1•varunn29•14m ago•0 comments

Ask HN: Isn't Anthropic currently doing "security through obscurity" for Mythos?

1•king_zee•14m ago•0 comments

Ask HN: How are you enabling your employees to do AI dev in the cloud?

1•nate•15m ago•1 comments

Show HN: Modeloop – From visual algorithms to microcontroller C code

https://www.modeloop.app/
1•lucamark•15m ago•0 comments

What does an effective org ops review process look to you?

1•mcrittenden•16m ago•0 comments

AI Cures Organizational Dementia

https://leadprompt.sh/a/735-AI-Cures-Organizational-Dementia-2026w15
1•saltysalt•16m ago•0 comments

Show HN: TLDR Equity

https://tldrequity.xyz/
1•tholford•17m ago•0 comments

The next hit: How LLMs change the way engineers work

https://www.aha.io/engineering/articles/the-next-hit-how-llms-change-the-way-engineers-work
1•FigurativeVoid•17m ago•0 comments

Building the systems that build the software

https://blog.nilenso.com/blog/2026/06/12/building-the-systems-that-build-the-software/
1•ath_ray•17m ago•0 comments

Show HN: Made my own analytics, Google Analytics let me down

https://daily-trivia.com/master-analytics-x7k29fqp#network
1•captaincrunch•18m ago•0 comments

Show HN: 100Hires MCP, 130 tools to run an ATS through LLM. Is 130 too many?

https://100hires.com/mcp
1•kravetsss•18m ago•0 comments

Estimating DuckLake query reads before execution

https://altertable.ai/blog/2026-06-15-know-what-a-query-reads
2•fvaleye•18m ago•0 comments

Surreal.js – 320 line jQuery alternative with inline Locality of Behavior

https://github.com/gnat/surreal
2•ethanpil•18m ago•0 comments

Launch HN: Drafted (YC P26) – Models for residential architecture

4•PrimalNick•19m ago•2 comments