Daniel Kim @SystemDesignDev

ex-SWE. Built things at scaling companies. Now I ship code and sometimes shitposts. 🌍 Joined May 2025

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Daniel Kim @SystemDesignDev

4 hours ago

Maintainability of code becomes murky when you "just trust the given code". Being a future dev and needing to fix a bug in your code base, and you can't even tell them where to look because you don't understand it, not because you're incapable, but because you didn't examine it…

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Daniel Kim @SystemDesignDev

13 hours ago

If code quality is slipping, it's rarely just the AI's fault. A well-architected system shouldn't crumble just because new features are added, whether they're written by a human or suggested by an LLM.

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Daniel Kim @SystemDesignDev

a day ago

I will do it for $25k

Sheel Mohnot @pitdesi

2 days ago

I will do it for $25k

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Daniel Kim @SystemDesignDev

a day ago

TDD in theory sounds smart. But in practice it’s just impractical. It’s a waste of time for me to go back and forth between my tests and code when I can look at the code and know exactly what needs to happen in order to make a change. Personally I find TDD a waste of time.

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Daniel Kim @SystemDesignDev

2 days ago

"If I have to suggest only one book to you, I would go with the “Clean Code”. There were things that I found outdated and not relevant for me when I read it 3-4 years ago, but I still re-review it often to not forget the gems and suggest it as a read for people I mentor." - me

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Daniel Kim @SystemDesignDev

2 days ago

Only TRUE developers can answer: - How many different API keys does your team manage? (rough estimate) - Where do you currently store them? - Biggest frustration with your current approach? - Ever had a production issue because of API key problems?

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Daniel Kim @SystemDesignDev

2 days ago

Find what problems you have and fix them. I found it's harder to do this kind of projects with web dev tho.. Almost every-time I've wanted to solve a problem I had it was easier to make it an app because I had access to the whole operating system, and it was also easier to run.

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Daniel Kim @SystemDesignDev

2 days ago

You just need to know the fundamentals and the implementations are fairly interchangeable. Ie, web server (nginx, apache, API Gateway, ...), server / application (express, FastAPI, Spring, ...), orm/odm, DB (postgres, mysql, mongo, ddb, ...), idl (OpenAPI, gRPC, ...). Do it!

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Daniel Kim @SystemDesignDev

2 days ago

Well! Australia

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Daniel Kim @SystemDesignDev

3 days ago

It takes time!

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Daniel Kim @SystemDesignDev

3 days ago

What’s a programming concept or habit you wish you had learned earlier in your career?

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Daniel Kim @SystemDesignDev

3 days ago

Selling is one thing: slap a website together, hook up credit card payments and start selling. But you also have to consider support and training. Who takes the phone calls? Who covers incoming emails? Where do you track support tickets?

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Daniel Kim @SystemDesignDev

4 days ago

It isn't just the browser you need to keep in mind. Firewalls, caching servers, everything in between your server and the browser can chop parts off the URL if you make it too long. Relying on extremely long URLs has inherent risks.

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Daniel Kim @SystemDesignDev

4 days ago

I have an android work profile that houses the work apps. I turns on at 8AM, and turns off at 5PM automatically. No one at work other than HR knows my personal number, and the number HR has goes to Google Voice, which also lives in the Work Profile.

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Rohit Lakhotia 🚢 @rohitlakh

4 days ago

Pinterest didn’t start dreaming of 500M users. In 2010, 3 founders + 1 engineer ran Python scripts in a tiny apartment. Their first stack was simple: Python for app logic, NGINX as HTTP proxy, MySQL with a read replica, MongoDB for counters, and a basic task queue. Users…

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Daniel Kim @SystemDesignDev

4 days ago

Honestly, customizing your resume for every single posting is just a marketing tactic pushed by AI tool sellers don’t fall for that. Having 2–3 solid versions of your resume and applying broadly to roles that fit your criteria is the way to go. Most ATS systems work first-in,…

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Daniel Kim @SystemDesignDev

4 days ago

If you feel the Job Market will never recover then read this: It's cyclical, the dot com bubble also cooled the market. We are talking about ten years from now, you can speculate all you want but I don't see software engineering disappearing, we are now seeing lots of problems…

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Daniel Kim @SystemDesignDev

5 days ago

A coworker recently replied to an email I sent saying "I ran your email through Copilot to summarize it. Is this accurate?" with the LLM text pasted underneath.😅 My boy, how about you read the email I wrote out for you and then you'll know if you can trust the summary.

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Daniel Kim @SystemDesignDev

5 days ago

We are in that awkward stage where leadership wants AI productivity, but compliance wants zero risk. And employees… they just want fast answers. Do we have a system that literally blocks sensitive data from ever hitting AI tools (without blocking the tools themselves) and which…