BrowserStack Interview Experience
BrowserStack Interview Experience for Experienced SDE - 1, Mar 2026
SDE - 1
Experienced
Website
2 months
NA, (Salary package: 26 LPA)
Computer Science Engineering
2 Rounds
Application Experience
I applied through the BrowserStack careers website and received a call from HR to schedule the interview. I was preparing for an SDE 2 backend role but got a call for an SDE 1 role. The first round was an introduction round, followed by a second round based on the basics of LLD.
Preparation
Topics Prepared: Networking, Database Fundamentals, OS, LLD
Preparation Tips
Tip 1: Prepare computer science concepts clearly with their practical applications. Tip 2: Learn the technologies used in distributed systems. Tip 3: Learn about Kafka and its use cases.
Resume Tips
Tip 1: Keep your tech stack at the top of your resume for better visibility. Tip 2: Highlight your achievements clearly to make your profile stand out.
Interview Rounds (2)
Detailed breakdown of each evaluation round, questions asked, and candidate approaches.
Round 1 — Video Call
Problems & Questions Asked (1)
System Design
What is a Distributed System? (Learn) What is CAP Theorem? (Learn) What is Horizontal vs Vertical Scaling? (Learn) What is Load Balancing? What is the difference and practical application of the L4 and L7 load balancer? (Learn)
Tip 1: Go through basic of distributed system. Tip 2: Go through the CAP theorem and its practical application. Tip 3: Go through the inner working of the load balancers.
Round 2 — Video Call
This was a LLD round where I had to write working code for circuit breaker.
Problems & Questions Asked (2)
System Design
Design a Circuit Breaker mechanism that prevents cascading failures when calling an external dependency (e.g., API, DB, service). It should: Detect failures Stop calls when failure threshold is reached Recover automatically after some time Core Functional Requirements 1. States of Circuit Breaker The system must support three states: CLOSED All requests pass through Failures are monitored OPEN All requests are blocked immediately Fail-fast without calling downstream service HALF-OPEN Limited requests are allowed Used to test recovery 2. Failure Handling Track failures (exceptions, timeouts, error responses) Maintain: Failure count OR Failure rate (over time window) Transition to OPEN when: Failure threshold is exceeded 3. Success Handling Track successful calls In HALF-OPEN: If enough successes → move to CLOSED If failure → move back to OPEN 4. Timeout Management Each request should have a timeout Timeout should be treated as a failure
Tip 1: Think in State Machine first (not classes). Tip 2: Always address concurrency & edge cases.
Selection Perspective
I was rejected because I was not able to explain the internal working of Kafka in a distributed system during a practical problem.
Key Preparation Tips
Prepare DSA thoroughly.
Practice aptitude and puzzle-based questions.
Have at least two good projects on your resume.
Be prepared to explain your projects clearly.
Practice coding problems involving Arrays, Binary Search, DP and Recursion.
Prepare common HR questions such as Tell me about yourself and Who is your role model?
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