RazorPay Frontend Interview Experience | SDE-2

Overview

Razorpay, a leading fintech company in India, offers financial technology solutions powering online payments and related services. The company is known for its robust engineering culture and technical depth. For the SDE-2 frontend/fullstack role, the interview process focused on evaluating candidates through practical design and coding challenges.

Interview Process

The interview process comprised 3-4 rounds:

1. Low-Level Design (LLD) + Coding
2. Machine Coding
3. Web Fundamentals
4. Hiring Manager Discussion

The process evaluated both design capabilities and practical implementation skills across multiple dimensions.

Technical Rounds

Round 1: Low-Level Design — ATM Machine

The candidate was tasked with designing and implementing an ATM Machine. This round focused on core object-oriented design principles.

Key Areas Tested:

• Designing core classes: ATM, BankAccount, and Card
• Object-oriented design patterns
• Withdrawal logic implementation
• Balance management
• Class relationships and interactions

Skills Evaluated:

• OOP concepts (encapsulation, inheritance, abstraction)
• State management in design
• Business logic implementation

Additional LLD/Machine Coding Problems

Related problems from similar interviews included:

• Git-like VCS: Designing a version control system with commands including init, add, commit, checkout, reset, status, log, and diff. Focus was on extensibility and command pattern implementation.
• In-Memory Search Engine: Building a system capable of adding/removing documents and searching for patterns/words with efficient indexing.
• Pub-Sub Model: Implementing either a persistent or in-memory message queue with producer/consumer offsets.

High-Level Design Problems

• In-Memory SQL Database: Designing a database supporting multiple data types, primary keys, indexing, and concurrent operations.
• Load Balancer: Creating a REST application to manage configurations (add/remove backends, health checks) and handle routing logic.