Scale Engineer

SDE

Software EngineerL4Medium to Hard

This interview process is for a Software Engineer (SDE) position at Coupang, specifically for the L4 level. It is designed to assess a candidate's technical proficiency, problem-solving skills, and cultural fit within the company.

Rounds·3

Timeline·~14d

Experience·3 - 7 yrs

Comp band·US$110000 - US$150000

Interview time·150 min

Evaluation

What they measure.

  • Technical depth and breadth
  • Problem-solving approach and analytical skills
  • System design capabilities
  • Coding proficiency and best practices
  • Communication skills
  • Cultural fit and teamwork

Preparation

How to prepare.

Tips

  1. Review fundamental data structures and algorithms.
  2. Practice coding problems on platforms like LeetCode, HackerRank, or AlgoExpert.
  3. Study system design principles and common patterns (e.g., load balancing, caching, databases, message queues).
  4. Prepare to discuss your past projects in detail, focusing on your contributions and the impact you made.
  5. Understand Coupang's business, products, and technology stack.
  6. Practice behavioral questions using the STAR method (Situation, Task, Action, Result).
  7. Be ready to explain your thought process clearly and concisely.
  8. Prepare questions to ask the interviewer about the role, team, and company culture.

Study plan

Fig · Study plan — 04 phases

01 / 04
01

Phase 01 of 04

Data Structures & Algorithms

Weeks 1-2: DSA Fundamentals & Practice (2-3 problems/day)

Weeks 1-2: Focus on core data structures (Arrays, Linked Lists, Trees, Graphs, Hash Tables) and algorithms (Sorting, Searching, Dynamic Programming, Greedy Algorithms). Practice medium to hard problems on LeetCode, aiming for 2-3 problems per day. Understand time and space complexity analysis.

Questions

Commonly asked.

  • Tell me about a challenging technical problem you solved.
  • How would you design a system to handle millions of concurrent users?
  • What are your strengths and weaknesses as a software engineer?
  • Describe a time you disagreed with a team member and how you resolved it.
  • How do you stay updated with new technologies?
  • Write a function to reverse a linked list.
  • Design a rate limiter for an API.
  • What is your experience with cloud platforms like AWS or GCP?
  • How do you approach debugging a complex issue in a distributed system?
  • Why are you interested in Coupang?

Locations

Regional differences.

Fig · Regions — 02 locations

01 / 02

Location

Seoul, South Korea

Interview focus

System Design for e-commerce scenariosLarge-scale data processing and distributed systemsPerformance optimizationUnderstanding of cloud technologies (AWS, GCP)Experience with specific technologies relevant to Coupang's stack (e.g., Java, Python, Go, Kubernetes)

Common questions

  • How would you design a recommendation system for Coupang Fresh?
  • Describe a time you had to deal with a large-scale data processing challenge.
  • What are your thoughts on microservices vs. monolithic architecture for an e-commerce platform?
  • How do you ensure code quality and maintainability in a fast-paced environment?
  • Tell me about a challenging debugging experience you had.

Tips

  • Research Coupang's business model and technology stack thoroughly.
  • Be prepared to discuss specific examples from your past projects that demonstrate your skills in system design and scalability.
  • Understand the nuances of the Korean market if interviewing for a role based in Korea.
  • Practice explaining complex technical concepts clearly and concisely.
  • Highlight any experience with high-traffic, low-latency systems.

Rounds

Round-by-round.

Expand a step for evaluation criteria, sample questions, and prep notes.

DSA

Coding questions at Coupang.

Frequently reported on Coupang loops

View all at Coupang

Other guides

More at Coupang.