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[@harshsinghsv](/creator/twitter/harshsinghsv)
"Let's talk about the single most frustrating sentence in all of software development: "But. it works on my machine." You've heard it. You've probably said it. You build a Node.js app. It works perfectly. You send it to your co-worker. It fails. Why Their Node version is different. You give it to the testing team. It fails. Why They're missing an environment variable. You deploy it to production. It fails. Why The production server has a different version of a critical system library. This is dependency hell. And for decades we "solved" it with Virtual Machines (VMs). A VM emulates an entire"  
[X Link](https://x.com/harshsinghsv/status/1980329780257124798) [@harshsinghsv](/creator/x/harshsinghsv) 2025-10-20T17:46Z XXX followers, 10.2K engagements


"You're a frontend dev. You just built a killer UI. Now you're stuck. You need a backend. You need a database. You need user auth. And that "weekend project" just became a 3-month infrastructure nightmare. You think "I need a server an RDS instance I need to write XX Express routes for CRUD I need to implement JWTs bcrypt password reset." This is the exact moment XX% of indie projects die. For years the answer was Firebase. But that meant getting locked into a NoSQL world (Firestore) that's not always the right fit. Today I really dove into Supabase and I'm stunned. Its the open-source"  
[X Link](https://x.com/harshsinghsv/status/1980649118595793127) [@harshsinghsv](/creator/x/harshsinghsv) 2025-10-21T14:55Z XXX followers, 94.9K engagements


"It's wild to think that before 2009 'JavaScript developer' meant 'frontend only'. You were the person who made dropdown menus work and validated forms. If you wanted to touch a database or write an API you had to stop and become a completely different developer. You'd write your JS then you'd have to switch your brain to PHP Ruby or Java to write the backend. Two languages two syntaxes two ecosystems. It was a massive wall. Then Node.js came along. I was just looking at the original w3schools 'Hello World' example and it's almost funny how simple it is. It's not a big heavy framework. It's"  
[X Link](https://x.com/harshsinghsv/status/1981023641329696772) [@harshsinghsv](/creator/x/harshsinghsv) 2025-10-22T15:43Z XXX followers, 4652 engagements


"If you're a dev and you're not using Postman (or a similar tool) you are actively choosing to make your life harder. I see a lot of people think it's just a "GUI for cURL." A simple tool to send a GET or POST request. That's not what it is. That's just step X. Postman is an entire API development platform. Today I was using it and it reminded me how central it is to a professional workflow. Let's go through the levels of using it. Level 1: The Request Builder (The "Hello World") This is what everyone knows. Instead of typing a messy cURL command in your terminal you get a clean UI. - Choose"  
[X Link](https://x.com/harshsinghsv/status/1980002530277933560) [@harshsinghsv](/creator/x/harshsinghsv) 2025-10-19T20:06Z XXX followers, 45.8K engagements


"You're a JavaScript dev. You just pushed a new feature to production. An hour later the Slack messages start. TypeError: Cannot read properties of undefined (reading 'name') Your stomach drops. You passed the wrong prop. Or an API response changed slightly. Or you misspelled 'user.firstName' as 'user.fName'. And your entire app crashed for 10000 users. This is the exact moment XX% of JS devs just accept that "this is fine." For months I avoided TypeScript. I thought it was for enterprise nerds who missed Java. I loved the "freedom" and speed of JS. I thought "I'm a good dev I can just be"  
[X Link](https://x.com/harshsinghsv/status/1980947652209520862) [@harshsinghsv](/creator/x/harshsinghsv) 2025-10-22T10:41Z XXX followers, 22.1K engagements


"Why you should use Typescript"  
[X Link](https://x.com/harshsinghsv/status/1980947985350693050) [@harshsinghsv](/creator/x/harshsinghsv) 2025-10-22T10:42Z XXX followers, 2080 engagements


"why nodeJs  lets find out"  
[X Link](https://x.com/harshsinghsv/status/1981024063721214268) [@harshsinghsv](/creator/x/harshsinghsv) 2025-10-22T15:45Z XXX followers, XXX engagements


"why nodeJs  lets find out"  
[X Link](https://x.com/harshsinghsv/status/1981024181924852158) [@harshsinghsv](/creator/x/harshsinghsv) 2025-10-22T15:45Z XXX followers, 1324 engagements


"Your app is slow. Your users are waiting X X maybe X seconds for a page to load. You check your logs. The problem isn't your code. It's your database. It's on fire. It's spending all its time running the same complex 'SELECT' queries with 'JOINs' and 'ORDER BY' clauses over and over just to fetch a user's profile and their XX most recent posts from a slow spinning disk. You've heard of Redis. You think 'cache'. You also think 'it's in-memory so if my server reboots all my data is gone'. You think it's just a temporary volatile speed boost a fragile layer you can't really depend on for"  
[X Link](https://x.com/harshsinghsv/status/1981692830545236078) [@harshsinghsv](/creator/x/harshsinghsv) 2025-10-24T12:02Z XXX followers, 160.3K engagements