Scale Engineer

Software Engineer

Software EngineerIC1Medium

The Software Engineer IC1 interview at Roblox is designed to assess foundational programming skills, problem-solving abilities, and cultural fit for early-career engineers. It emphasizes core computer science concepts and the candidate's potential to grow within the company.

Rounds·2

Timeline·~14d

Experience·0 - 2 yrs

Comp band·US$85000 - US$110000

Interview time·90 min

Evaluation

What they measure.

  • Problem-solving approach
  • Code clarity and efficiency
  • Understanding of data structures and algorithms
  • Communication skills
  • Enthusiasm for Roblox and gaming

Preparation

How to prepare.

Tips

  1. Review fundamental data structures (arrays, linked lists, trees, hash maps) and algorithms (sorting, searching, graph traversal).
  2. Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte, focusing on Easy and Medium difficulty.
  3. Understand basic object-oriented programming (OOP) concepts.
  4. Prepare to discuss your past projects and experiences, highlighting your contributions and learnings.
  5. Research Roblox's mission, values, and recent news.
  6. Familiarize yourself with the Roblox platform, especially if applying for a remote role.
  7. Practice explaining your thought process clearly and concisely.

Study plan

Fig · Study plan — 04 phases

01 / 04
01

Phase 01 of 04

Data Structures Fundamentals

Weeks 1-2: Data Structures (Arrays, Linked Lists, Stacks, Queues, Hash Maps) & Big O.

Weeks 1-2: Focus on core data structures like arrays, linked lists, stacks, queues, and hash maps. Practice implementing them and solving problems involving their use. Understand time and space complexity (Big O notation).

Questions

Commonly asked.

  • Write a function to reverse a string.
  • Given an array of integers, find the two numbers that add up to a specific target.
  • Explain the difference between a process and a thread.
  • Tell me about a time you failed and what you learned from it.
  • Why are you interested in working at Roblox?
  • How would you approach debugging a performance issue in a web application?

Locations

Regional differences.

Fig · Regions — 02 locations

01 / 02

Location

San Mateo, CA

Interview focus

Adaptability to local tech scene trends.Understanding of regional market expectations for junior roles.

Common questions

  • Describe a challenging bug you fixed and how you approached it.
  • How do you stay updated with new technologies?
  • Tell me about a time you had to work with a difficult teammate.

Tips

  • Research local tech meetups and communities.
  • Understand the specific industry focus of the Roblox office in this region.

Rounds

Round-by-round.

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

Med

Technical Interview (Coding) · 45 min · Software Engineer

This round focuses on assessing your core programming skills. You will be asked to solve one or two coding problems, typically involving data structures and algorithms. The interviewer will evaluate how you approach the problem, your coding style, efficiency, and your ability to communicate your thought process.

What they look for

Clear and logical thinking.Ability to translate a problem into code.Understanding of basic data structures and algorithms.Ability to explain their solution and trade-offs.

Evaluation

  • Problem-solving approach
  • Coding proficiency
  • Understanding of time and space complexity
  • Communication of thought process

Sample questions

  • Given an array of integers, return indices of the two numbers such that they add up to target.

    ArrayHash MapTwo Pointers

  • Implement a function to check if a binary tree is a Binary Search Tree (BST).

    TreeRecursionBinary Search Tree

Prep for this round

  1. 01Practice coding on a whiteboard or a shared editor.
  2. 02Think out loud as you solve the problem.
  3. 03Ask clarifying questions if the problem statement is unclear.
  4. 04Consider edge cases and test your solution mentally.

Common rejection reasons

  • ×Inability to articulate thought process.
  • ×Poor understanding of fundamental data structures/algorithms.
  • ×Code contains significant bugs or is highly inefficient.
  • ×Lack of clarity in communication.

DSA

Coding questions at Roblox.

Frequently reported on Roblox loops

View all at Roblox

Other guides

More at Roblox.