Scale Engineer

Software Engineer II

Software EngineerL2Medium

The Software Engineer II (L2) interview at Poshmark is designed to assess a candidate's technical proficiency, problem-solving abilities, and cultural fit within the company. It typically involves multiple rounds focusing on data structures, algorithms, system design, and behavioral aspects.

Rounds·3

Timeline·~7d

Experience·2 - 5 yrs

Comp band·US$110000 - US$150000

Interview time·150 min

Evaluation

What they measure.

  • Problem-solving skills
  • Algorithmic thinking
  • Data structure knowledge
  • Coding proficiency
  • System design capabilities
  • Communication skills
  • Teamwork and collaboration
  • Cultural fit

Preparation

How to prepare.

Tips

  1. Review fundamental data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming, graph traversal).
  2. Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte, focusing on medium-difficulty problems.
  3. Study system design concepts, including scalability, availability, reliability, and common design patterns.
  4. Prepare for behavioral questions by using the STAR method (Situation, Task, Action, Result) to structure your answers.
  5. Research Poshmark's mission, values, products, and recent news to understand the company's context.
  6. Prepare thoughtful 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 and Algorithms Fundamentals

Weeks 1-2: Data Structures & Basic Algorithms. Practice implementations and basic problems.

Weeks 1-2: Focus on core data structures (arrays, linked lists, stacks, queues, trees, graphs, hash tables) and their common operations. Practice implementing these structures and solving problems related to them. Cover basic algorithms like sorting (quicksort, mergesort) and searching (binary search).

Questions

Commonly asked.

  • Given an array of integers, find the contiguous subarray with the largest sum.
  • Design a URL shortening service like bit.ly.
  • Explain the difference between a process and a thread.
  • How would you handle a sudden spike in traffic on Poshmark's website?
  • Describe a challenging bug you encountered and how you debugged it.
  • What are the trade-offs between using a relational database and a NoSQL database for Poshmark's user data?
  • Write a function to reverse a linked list.
  • How do you ensure the security of user data in a web application?
  • Tell me about a time you disagreed with a teammate and how you resolved it.

Locations

Regional differences.

Fig · Regions — 02 locations

01 / 02

Location

USA

Interview focus

Emphasis on practical application of algorithms and data structures in real-world scenarios.Understanding of distributed systems and cloud technologies (AWS, GCP).Ability to articulate technical decisions and trade-offs clearly.

Common questions

  • How would you design a scalable notification system for Poshmark?
  • Describe a time you had to deal with a difficult technical challenge and how you overcame it.
  • What are your thoughts on microservices vs. monolith architecture for an e-commerce platform?
  • Explain the concept of eventual consistency and its relevance in distributed systems.

Tips

  • Be prepared to discuss your experience with specific AWS services if applying for a role with cloud focus.
  • Familiarize yourself with common e-commerce challenges and Poshmark's business model.
  • Practice explaining complex technical concepts in a concise manner.

Rounds

Round-by-round.

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

DSA

Coding questions at Poshmark.

Frequently reported on Poshmark loops

View all at Poshmark

Other guides

More at Poshmark.