Deepak Gupta

I have researched lots of product-based companies like Amazon, Microsoft, Netflix, Zomato, Goldman Sachs, Paytm, J.P. Morgan etc., for SDE1 2 roles, and found that these 20 system design questions are almost asked in every interviews, both at the fresher and experienced levels. 𝐅𝐫𝐞𝐬𝐡𝐞𝐫 𝐋𝐞𝐯𝐞𝐥 𝐒𝐲𝐬𝐭𝐞𝐦 𝐃𝐞𝐬𝐢𝐠𝐧 1. Design a simple URL shortening service. 2. Design a basic chat application. 3. Design a file storage system. 4. Design a simple social media platform. 5. Design a simple search engine. 6. Design a simple e-commerce website. 7. Design a basic ride-sharing system. 8. Design a basic video streaming service. 9. Design a simple recommendation system. 10. Design a basic food delivery app. 11. Design a parking lot management system. 12. Design a simple music streaming service. 13. Design a basic online ticket booking system. 14. Design a simple note-taking application. 15. Design a weather forecasting system. 16. Design a basic email service. 17. Design a file synchronization system. 18. Design a simple calendar application. 19. Design a basic online quiz platform. 20. Design a user authentication system. 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞𝐝 𝐋𝐞𝐯𝐞𝐥 𝐒𝐲𝐬𝐭𝐞𝐦 𝐃𝐞𝐬𝐢𝐠𝐧 1. Design a URL shortening service like bit.ly. 2. Design a distributed key-value store like Redis. 3. Design a scalable social network like Facebook. 4. Design a scalable recommendation system like Netflix. 5. Design a distributed file system like Hadoop's HDFS. 6. Design a real-time messaging system like WhatsApp. 7. Design a web crawler like Google. 8. Design a distributed cache like Memcached. 9. Design a content delivery network (CDN) like Cloudflare. 10. Design a scalable search engine like Google. 11. Design a ride-sharing system like Uber. 12. Design a video streaming service like YouTube. 13. Design an online food delivery system like Zomato. 14. Design a collaborative document editing system like Google Docs. 15. Design an e-commerce platform like Amazon. 16. Design a recommendation system for an online marketplace. 17. Design a fault-tolerant distributed database system. 18. Design a scalable event-driven system like Twitter. 19. Design a scalable photo-sharing platform like Instagram. 20. Design a distributed task scheduling system. Learn and solve these, and you’ll be fully prepared for your next System Design interviews.. System design can be tough to crack, but having the right resources makes all the difference. Came across this well-structured, in-depth guide definitely worth a read. 𝗖𝗵𝗲𝗰𝗸 𝗶𝘁 𝗼𝘂𝘁 𝗵𝗲𝗿𝗲: https://lnkd.in/gxRRyd2m #tech #collab

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MSMEs are India’s heartbeat and at Flipkart’s Seller Summit in Delhi that heartbeat grew stronger. From artisans to digital-first sellers, everyone arrived with a shared aspiration to grow with purpose. The government’s emphasis on self-reliance and quality deeply resonated. These summits are practical guides that can turn festive seasons into turning points. When small businesses gain the right tools and insights, they shape sales and they shape the future of India’s economy. What more can be done to empower MSMEs to unlock their full potential in the digital era? #FlipkartSellerSummit #Entrepreneurship #Flipkart #DigitalIndia #MSMEGrowth #SellerCommunity https://lnkd.in/gDYvs5nZ

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India launched DigiPIN: A game-changing digital address system. No more "Mandir ke peeche wali gali." 👉 What is DigiPIN? It’s a unique 10-character alphanumeric code that maps every 4x4 meter location in India, developed by #India Post in collaboration with IIT-Hyderabad and ISRO. Unlike the traditional PIN code, which covers large areas and causes confusion, DigiPIN is precise, offline-friendly, and location-specific, think of it as a desi version of GPS, designed for every Indian. 👉 Why was the old PIN code broken? - One PIN covers many houses - No rooftop-level accuracy - Delayed e-commerce deliveries - Confusing for couriers & services 👉 Why DigiPIN is a gamechanger: - Every home, shop, or hut gets a unique code - Enables fast deliveries, emergency services & accurate voter/Aadhaar linking - Works in rural, urban, and remote areas - No need to describe long addresses - Doesn’t store any personal info, just the exact geolocation 👉 How to get your DigiPIN? - Go to: India Post website - Enter your location - Get your unique 10-digit DigiPIN (You’ll need a device with GNSS or GPS to fetch accurate coordinates.) DigiPIN supports India Post’s “Address-as-a-Service (AaaS)” initiative and is open-source & interoperable, meaning developers can also use the code publicly. This isn’t just a tech upgrade. It’s a leap toward Digital Bharat. A future where even the smallest village has a digital identity, empowering governance, commerce, and citizens alike. 👉 DigiPIN is live. Help your family and friends get their digital address today!

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If you thought you’d leave data structures behind after college.  Think again. – Google Maps, graphs in action, finding the shortest path for you every single day. – WhatsApp, queues, to make sure your messages are delivered in order. – Instagram Stories, stacks, letting you go back through stories one by one. – Chrome’s Incognito Tabs, linked lists, so you can jump between tabs seamlessly. – Spotify, hash maps, to instantly pull up your playlist or favorite song. Also, – Amazon uses recommendation algorithms to suggest products just for you. – Facebook uses priority queues to decide what shows up on your news feed. – Uber uses graph search to find the closest drivers and fastest routes. – YouTube uses tries to autocomplete your search instantly. – Twitter uses rate-limiting algorithms to prevent spam and abuse. You have to practice DSA for interviews, yes. But don’t skip over the foundations just because you’re in a hurry. Because one day, you’ll hit a challenge where the right answer will come from actually understanding how things work under the hood. If you don’t build a strong foundation now, you’ll feel it when it matters most. Because sooner or later, every real engineering problem comes back to the basics. When the system breaks, the deadlines close in, or your code needs to scale for millions, It won’t matter what language or framework you know. What matters is whether you understand the building blocks. That’s the difference between fixing things and just guessing.

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No-BS advice for growing and aspiring software engineers from 20 years of lived experiences at Amazon, Google, Paytm, and multiple startups…(this made me who I am today..) 1. Go deep in one programming language, stick with it for 100 days, don’t hop around. 2. Learn at least one strongly typed language, it will teach you to build scalable systems. 3. Master data structures, algorithms, and design patterns, you will use them in real-world systems. 4. Get obsessed with debugging, learn to use logs, tools, and step through unfamiliar code until you find the bug. 5. Think in first principles, don’t take “that’s just how it is” as the answer, go figure out the real reason. 6. When stuck, step away, your best ideas come when you disconnect, not when you force it. 7. Ship an app end-to-end, even if it’s ugly, nothing beats building, deploying, and maintaining your own project. 8. Stay with projects for more than a year, only then will you see the real impact of your design decisions. 9. Don’t chase every shiny new framework, learn the fundamentals and choose tools that stand the test of time. 10. Don’t get intimidated by complexity, every big system is just code written by people like you. 11. Be curious, explore outside your main stack, and learn from every domain you touch. 12. Don’t sleep on AI, start learning and using AI tools, or you’ll be left behind. 13. Crack a FAANG interview at least once, it changes your career, your network, and your earning power. 14. Treat interviews as a learnable skill, practice, mock, and study until you’re good. 15. Don’t job-hop too often, long stints on tough projects get you big-impact, big-trust roles. 16. Learn to spot and grab opportunities, watch for new initiatives, reorgs, or problems no one else wants. 17. Advocate for yourself, document your impact, socialize your wins, and talk about your work. 18. Understand promotions, they’re a game; study how your company does it, and play to win. 19. Keep a brag document, track every win, big or small, and review with your manager regularly. 20. Take control of your career, no one cares about your growth as much as you do.

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↬ Trapit Bansal, the IIT alum who got an 800 Crore signing bonus from Meta after being recruited into their superintelligence team... → He was once also a beginner who was curious about how websites actually work, tinkering with simple HTML pages long before “AI” was a buzzword. ↬ Sundar Pichai, who now leads Google and Alphabet... → He was once a student at IIT Kharagpur, struggling to figure out the difference between Java and JavaScript, just hoping to make something work. ↬ Gaurav Munjal, co-founder of Unacademy, who scaled his startup to a multi-billion dollar edtech giant... → He was once uploading coding tutorials on YouTube from his college dorm, unsure if anyone would even watch. ↬ Tanmay Bakshi, the machine learning prodigy at IBM... → He was once just a kid fascinated by solving Sudoku puzzles, before he ever wrote a line of code. The real problem I see today is impatience. If you’re aiming for a life-changing package, it’s going to take a life-changing amount of effort too, no matter what anyone tells you. Every example above started off as a clueless beginner, and they were patient enough to be bad, make mistakes, and keep showing up. They weren’t obsessed with overnight results, they obsessed over getting better, even if it was just 1% at a time. No matter how badly you want success, some things take the time they need and it’s important you give yourself that time. Remember: Everyone you look up to was a beginner once. And the only thing they did differently was stick with it when it was hard. Be patient. Keep building. Your story is still being written.

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Most people think scaling a business means fancy webpages and ad campaigns. But Amar Chitra Katha fixed something way more basic ,their payment system. Earlier 9% of their customers were not able to complete their payments. They had to manually type in their UPI ID and there was no backup if one gateway failed. Basically: More payment failures = More Drop-offs. Then they switched to Razorpay. ✅ UPI worked like magic, no typing, smooth redirects ✅ If one payment gateway failed, it auto-switched to another ⁠And just like that they were able to make an additional 11.3L in revenue in just 30 days. My biggest takeaway: Sometimes, it's the invisible infrastructure that creates the most visible results. If you're a founder who has solved something similar for your business, I'd love to hear your story in the comment section Check out the video for more 👇 #Payments #Razorpay #GrowthStory #SimpleWins

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