Ritesh Roushan

🧠 Google autocomplete is straight-up sorcery. You type just "how to..." And it instantly drops: • how to make money • how to cook pasta • how to tie a tie This happens across 16.4 BILLION searches every single day in 2026. How the hell does it return perfect suggestions in under 100ms at this scale? Deep technical breakdown 👇 1. Trie (Prefix Tree) - The Magic Data Structure Every character is a node in a tree. Typing “h-o-w- -t-o” walks straight to the exact prefix node in O(K) time (K = length of input). No scanning billions of queries just instant pointer to all completions. 2. Precomputed + Smart Ranking Offline pipelines crunch trillions of past searches daily. Each trie node stores top-K suggestions pre-ranked by: • Frequency & trends • Click-through rate • Personalization (your history) + location + freshness ML models keep everything updated in real-time. 3. Production-Grade Scaling • Sharded & replicated across global data centers • In-memory layers (custom + Redis-style caching) for hottest prefixes • Edge/CDN caching + microservices load balancing • Handles 100,000+ queries per second with p99 latency <100ms This exact pattern powers autocomplete on LinkedIn, Amazon, YouTube anywhere you see instant suggestions. Backend & system design devs: this is the gold standard. Saved this thread? Drop 🔥 below. What Google feature should I break down next?

@Inosukeei_coder @Hiteshdotcom @ChaiCodeHQ Exactly seems like promotion to get more students.

@devXritesh @Hiteshdotcom @ChaiCodeHQ I think is just for promotion/ragebait later they fixed it.

Promotion Karne ka acha tarika thoda casual hai Hat's off to 🫡 @Hiteshdotcom @ChaiCodeHQ

@0xPrajwal_ @Hiteshdotcom @ChaiCodeHQ For a single course 1.8L. literally this is too much. I have learnt many topics from his free tutorial.

@devXritesh @Hiteshdotcom @ChaiCodeHQ How expensive is this ?

@Reddy__253 @Hiteshdotcom Bhai tum to outbox content dhund rahe ho 😅

@Hiteshdotcom Mein to vella hu 😭, sir aap mujhe block kardo thoda alag content ho jayega

Twitter is nice but a few unknown face with blue ticks are trying very hard to get engagement revenue. It’s fine for me, I am retired and can afford to waste a day in having fun n laugh. You should be very careful with this. My recommendation is that you will get value only from real people because they know the words like accountability n reliability. Baaki aapka jo mn ho kro, aazad desh h ji. 😁

@shubh19 Here is my strategy, I have shared on medium 👇 devxritesh.medium.com/how-to-actuall…

If you’re job hunting, this 30-second LinkedIn Hack is gold. 👇🏻 You see your dream job, then you see 1000+ applications. Now you can be the first one to apply. We have a simple LinkedIn hack that you can use to be the first person to apply for a job. Here’s how it works: 1. Look for a job like you do on LinkedIn. 2. Filter for “Past 24 hours.” This activates a time filter in the URL. 3. In the URL bar, look for this part: r86400. It stands for 24 hours. 4. In the URL, change "86400" to “1800" 5. Changing the URL will only show jobs posted within the last 30 minutes. Take some time to edit the resume and then apply! How does this work? The “86400” is a day in seconds, and you can play around with the number to filter for jobs For last, 12 hours = 43200 6 hours = 21600 1 hour = 3600 30 mins = 1800 Happy job hunting.

@hida_artemis Ohh great then, excited to try once

@devXritesh not just mine, everyone can build theirs yeah I do use three.js as one of the part

been working on this for more than a week now. building your own game engine is definitely not easy. V1 should be shipped max next month 👀 tuning and fixing all errors and codes (there is so so much that need to be keeping in mind)😭 the vision is so you can build your own world and make visitor explore your works :) *it's a portfolio / site world builder*

@hiarun02 I would delete two things first that ATS tracking system and second literally vibe coding.

If you could delete ONE technology from existence, what would it be?

@konnydev Full application building with deployment. We need to just write a single prompt 🫠

In 2024 we had code completion In 2025 we had vibe coding In 2026 we have … ?

@knowRowan LLM gives optimised code and better than human written for now.

AI generated code summed up:

@vishaltweetup Macbook

Which one do you need right now: • MacBook • iPhone

@ravikiran_dev7 Will drop Article tomorrow, till now checkout API design post.

@devXritesh Rest api design summary 🫠

System Design Series - Week 1 Q&A Drop your questions from this week: - REST API design - SQL vs NoSQL choice - Database indexes - API pagination I'll answer every single one. Let's clarify before Week 2 starts Monday. Questions below 👇 #SystemDesign #QandA #Week1

MySQL Faster for simple read-heavy apps Easy to set up, widely used in web apps (LAMP stack) Good for basic CRUD systems PostgreSQL More powerful & feature-rich (complex queries, joins, JSON support) Better for scalability, analytics, and strict data integrity Preferred for fintech, SaaS, and system design-heavy apps Rule: Simple app → MySQL Complex/scalable system → PostgreSQL

@devXritesh vhi mtlb tha mysql vs postgres

@therahul4402 FR bro, I used to learn from his free youtube tutorial. Now this much

Aise hi Hitesh sir ko sir nahi bolte… sir mazaak me fees bhi double kar dete hai 😭

@ravikiran_dev7 It will not hurt battery if u keep charging after 100%

Does keeping your laptop plugged in at 100% while using it , slowly ruin the battery or is it just a myth?

@priyankapudi It's painful feeling because work hard in prompting but forgot to care about technical issues.

Vibe coders when the app worked perfectly in development But crashed the moment it hit production

@ChillxxLife Bro I will drop article link tomorrow morning in detailed breakdown.

@devXritesh REST API design Database indexes

@shubh19 Definitely not, I'm telling after Learning. Checked X and scrolling and you find such post.

@devXritesh i mean that's literally a 5 second learning process now

Me learning something cutting-edge: 😎 𝕏 5 seconds later: "It's been dead bro" 🔥💀

@nastenka_twt Bro SQL is Language, Postgres is Database. You can ask select b/w MongoDB Vs Postgres or MongoDB or MYSQL

@devXritesh how to select b/w sql and postgresSql

Use SQL (e.g., PostgreSQL, MySQL) when you need structured data, strong consistency, complex queries like joins, and transactions, like fintech, e-commerce, or user systems. Use NoSQL (e.g., MongoDB) when you need flexibility, high scalability, fast reads/writes, and handle unstructured or rapidly changing data, like real-time apps, analytics, or social feeds.

@devXritesh which db you'll in which condition eg sql and postgres etc