My Interview Experience at Dream11 (SDE 1 Frontend)

I had applied long back for SDE 1 Frontend role at Dream11. At that time, I had around 1+ years of experience working as a frontend developer in a product-based company.
Overall, the process had 4 rounds – mix of DSA, JavaScript, machine coding, React fundamentals and finally HR.

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Round 1 – DSA

The first round was purely Data Structures & Algorithms.
I was asked 2 coding questions:

• Both were string based.
• Difficulty was medium–hard.
• One required use of stack.
• Another was based on permutation/combination logic.

It took me some time, but I managed to solve both.

👉 Tip: For Dream11, be strong in string manipulation + stack-based problems.

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Round 2 – Machine Coding + JS Concepts

This round was a blend of hands-on coding and JavaScript theory.

Tasks I faced:

• Implement a polyfill of Promise.
• Some JavaScript output-based questions covering:
  • Closures
  • call, apply, bind
  • async/await

👉 Tip: Brush up on JS internals and be comfortable writing polyfills.

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Round 3 – Hiring Manager

This round was more about real-world frontend + React knowledge.

Some key questions:

• How can you optimise large lists in React Native?
  • I explained virtualisation and how it improves performance.
• Difference between useEffect and useLayoutEffect.
• General discussion on React lifecycle and performance best practices.

👉 Tip: Expect performance and optimisation-based questions beyond just coding.

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Round 4 – HR

This was the final round.
Mostly behavioural and fitment questions, like:

• Why Dream11?
• My previous work experience.
• Career aspirations.

Nothing too technical here.

Final verdict: Got an offer & later joined them as SDE 1 (frontend)

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Preparation Resources

Here are some resources that helped me in preparation and I would recommend:

📘 DSA

• LeetCode – String & Stack Questions
• GeeksforGeeks – Must Do Coding Questions

⚡ JavaScript (Core + Polyfills)

• JavaScript Info
• Polyfills in JavaScript
• Practice writing polyfills for Promise, bind, throttle, debounce.

⚛ React & React Native

• React Official Docs
• React Native Performance Tips
• Blog posts on virtualisation & lifecycle hooks.

🎥 YouTube Playlists

• Akshay Saini’s Namaste JavaScript
• Codevolution’s React Hooks Tutorial

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Final Thoughts

My overall experience with Dream11 was good. The questions were fair and focused on:

• DSA fundamentals
• JavaScript depth
• Practical React/React Native performance

If you’re preparing, I would say focus on strong basics, hands-on coding, and performance optimisations.

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