DE Shaw SDE Interview Experience – Cracked it (Sept 2024 – Jan 2025)

• Education: B.Tech in CSE
• Years of Experience: 1year 6 months (at the time of initial interview)

After what felt like a mini UPSC journey with debugging instead of essays, I’m thrilled to share that I finally cracked the DE Shaw SDE interview and received an offer! Here's a light-hearted (but honest) take on the whole ride:

🎯 Coding Round (Sept 2024)

HR slid into the inbox with an opening for SDE, asked for my resume, and boom—a HackerRank link appeared like a boss level in a game.

Contents of this boss battle:

• 3 medium DSA problems

• 10 MCQs on math & probability (because who doesn’t love random number fun?)

• 10 MCQs on CS fundamentals (the classic CPU-meme material)

🕵️‍♂️ Screening Round – Round 1 (Sept 2024)

• DSA: Solved Binary Tree Cameras — yes, trees again

• System Design: Had a low-level design discussion on Stack Overflow — ironically, without actually looking it up on Stack Overflow 👀

🧠 Tech Onsite – Round 2 (Oct 2024)

DSA:

• Maximize Score of Numbers in Ranges

• Given a string and an integer k, return the lexicographically smallest string after at most k deletions.

CS Fundamentals:

• Difference between primary and alternate keys

• Is function overloading/overriding possible in Java main()?

• Encapsulation vs Abstraction

• SQL: Given a history table with columns (userLoginId, location, loginTime), write a query to fetch the first login time per userLoginId (note: IDs can repeat).

• What is method hiding? (Hint: It’s not magic, it’s just static.)

• What are macros in C++? (Answer: The preprocessor’s version of ‘YOLO’.)

🧩 Tech Onsite – Round 3 (Oct 2024)

• DSA: Count inversions where arr[i] >= 2 * arr[j], i < j

• OOP: Composition vs Inheritance — or why has-a sometimes beats is-a

• System Design: Low-level design of Google Classroom (teachers, students, subjects)

• Project discussion based on resume

👨‍💼 Hiring Manager Round (Nov 2024)

Welcome to the final boss fight. This was the most challenging and in-depth round:

• Resume walkthrough, discussion on full-time and internship projects

• SQL: Query for A-B table difference

DBMS:

• What is isolation in DBMS? How is it handled at the application level?

• Indexing strategies, B-Tree vs B+Tree, why not AVL?

• OS: Scheduling strategies, optimal approaches

• 32-bit vs 64-bit CPUs

DSA:

• Good chips / bad chips problem (CLRS)– proposed O(n²), was expected to optimize further

Behavioral:

• A typical day at work

• A time when I handled a critical problem collaboratively

• Why DE Shaw? (Because it’s awesome. And also... please hire me :p)

📣 Result (Dec 2024)

Received the offer letter! Felt like finally unlocking the legendary loot box.

📞 Offer Call (Jan 2025)

Final formalities, discussions, and yes, finally, celebration.
Link: https://leetcode.com/discuss/post/6298704/de-shaw-india-member-technical-bangalore-dsz3/

⚠️ Tips / Reality Checks

Be very patient — DE Shaw has a slow but very deliberate process. They interview in batches and shortlist from the pool.

Interview difficulty: Medium to Hard

Good preparation and consistent revision = very crackable

If you're prepping — good luck, and remember: you're just one optimized SQL query and a good night's sleep away from cracking it xD.