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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•12mo 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!

Show HN: PerceptAI – Give AI agents eyes on any screen, not just browsers

1•Neerajj04•1m ago•0 comments

A decade of flying Spirit Airlines

https://jackfromgetcho.substack.com/p/farewell-and-thank-you-spirit
1•jackconsidine•1m ago•0 comments

Training an LLM in Swift, Part 1: Taking matrix mult from Gflop/s to Tflop/s

https://www.cocoawithlove.com/blog/matrix-multiplications-swift.html
1•zdw•5m ago•0 comments

The Darwinian Honeymoon – Why I am not as impressed by human progress as I used

https://www.lesswrong.com/posts/FxHzT6jeTRhbkzSX3/the-darwinian-honeymoon-why-i-am-not-as-impress...
1•joozio•6m ago•0 comments

Memgraph Ingester. Speed up your AI agent

https://github.com/ousatov-ua/memgraph-ingester/blob/main/README.md
1•taubek•6m ago•0 comments

Full Walkthrough: Workflow for AI Coding – Matt Pocock [video]

https://www.youtube.com/watch?v=-QFHIoCo-Ko
1•pramodbiligiri•8m ago•0 comments

Hi

2•milindsoni201•8m ago•0 comments

How to recruit junior/graduate software developers (2020)

http://fourlightyears.blogspot.com/2020/12/heres-how-to-recruit-juniorgraduate.html
1•mooreds•9m ago•0 comments

Code Bench – Local-first desktop AI coding agent, BYO model (MIT)

https://benchlabs.app/code-bench/
2•mkappworks•13m ago•0 comments

Hydra: 5-player packet collider in under 1000 lines of Python

https://github.com/ObliviousCompute/ObliviousCompute/blob/main/Hydra/README.md
1•InfiniteMass•14m ago•0 comments

I built a meal planner AI agent to solve my weekly dinner dilemma (2025)

https://contentdesignhub.com.au/blog/how-i-built-a-meal-planner-ai-agent-to-solve-my-weekly-dinne...
1•mooreds•15m ago•0 comments

Causality Re-Established

https://pmc.ncbi.nlm.nih.gov/articles/PMC5990655/
2•amelius•16m ago•0 comments

A Manifesto for the Intentional Internet

https://babbo.dev/intentio
1•JosephBabbo•17m ago•0 comments

Found a guy who applied to over 5k+ job applications am I cooked?

https://www.youtube.com/watch?v=RRGOAj2dEX4
1•alltobi•17m ago•2 comments

Tech arrogance, self-criticism, and burning money to cope

https://exhaustedmind.substack.com/p/a-test-of-how-arrogant-the-tech-community
1•Psychoterapist•19m ago•0 comments

The Engineering of Copper Extraction

https://www.youtube.com/watch?v=7vN614cPqTM
1•ggoo•20m ago•0 comments

VDCores: Resource Decoupled Programming and Execution for Asynchronous GPU

https://arxiv.org/abs/2605.03190
2•matt_d•20m ago•0 comments

Your Scrum Isn't Scrum

https://theendofcoding.com/blog/your-scrum-isnt-scrum
1•nbouvrette•20m ago•0 comments

Show HN: Agent Postmortem Skill – Force AI coding agents to prove their work

https://github.com/plus8bit/agent-postmortem-skill
1•plus8bit•21m ago•0 comments

ECS Back and Forth (2019)

https://skypjack.github.io/2019-02-14-ecs-baf-part-1/
1•tosh•23m ago•0 comments

Cron job, scheduled tasks, automations... AI needs better metaphors

https://metedata.substack.com/p/011-ai-needs-better-metaphors
1•young_mete•24m ago•0 comments

EnTT

https://github.com/skypjack/entt
1•tosh•25m ago•0 comments

Wall Street lawyers aided insider trading ring, say US prosecutors

https://www.ft.com/content/d2fbe2c3-103a-4d09-b510-db58c5f8697d
3•johnbarron•28m ago•1 comments

Write SaaS apps where users control where their data is stored

https://linkedrecords.com/
1•WolfOliver•30m ago•0 comments

After 3 decades of splendid scientific communication, this one's for you, Ned

https://www.adn.com/alaska-news/science/2026/05/08/after-3-decades-of-splendid-scientific-communi...
2•rolph•30m ago•0 comments

Overfitting to First Party Harnesses

https://www.dbreunig.com/2026/05/10/overfitting-the-harness.html
1•dbreunig•31m ago•0 comments

Ask HN: Can there be a YC batch in Europe?

2•georgestrakhov•31m ago•2 comments

Occasional Paper: Blue Angels, Devil Hands

https://crookedtimber.org/2026/04/28/occasional-paper-blue-angels-devil-hands/
1•jruohonen•32m ago•0 comments

I Shipped a "Simple" Infrastructure Migration and Got 2 Prod Incidents in 24h

https://awstip.com/how-i-shipped-a-simple-infrastructure-migration-and-got-2-production-incidents...
2•gpi•33m ago•0 comments

Remind HN: Today is Mother's Day, call your moms

50•rationalist•33m ago•11 comments