Scale Engineer

Software Engineer

Software EngineerL6Hard

This interview process is for a Software Engineer (L6) role at Twitch. It is designed to assess a candidate's technical expertise, problem-solving abilities, system design skills, and cultural fit within the company. The process is rigorous and aims to identify individuals who can contribute significantly to Twitch's platform and engineering culture.

Rounds·4

Timeline·~14d

Experience·5 - 10 yrs

Comp band·US$150000 - US$200000

Interview time·180 min

Evaluation

What they measure.

  • Problem-solving approach and analytical skills
  • Technical depth and breadth
  • System design and architectural thinking
  • Coding proficiency and best practices
  • Communication and collaboration skills
  • Cultural fit and alignment with Twitch values

Preparation

How to prepare.

Tips

  1. Review fundamental data structures and algorithms.
  2. Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte, focusing on medium to hard difficulty.
  3. Study system design principles and common patterns for scalable applications.
  4. Understand distributed systems concepts such as consistency, availability, and partitioning.
  5. Prepare to discuss your past projects in detail, focusing on your contributions, challenges, and learnings.
  6. Research Twitch's products, services, and engineering culture.
  7. Practice behavioral questions using the STAR method (Situation, Task, Action, Result).
  8. Prepare thoughtful questions to ask the interviewers about the role, team, and company.

Study plan

Fig · Study plan — 04 phases

01 / 04
01

Phase 01 of 04

Data Structures and Algorithms

Weeks 1-2: Data Structures & Algorithms fundamentals. Practice 5-7 problems daily.

Weeks 1-2: Focus on core data structures (arrays, linked lists, trees, graphs, hash tables) and algorithms (sorting, searching, dynamic programming, graph traversal). Practice implementing these in your preferred language and analyze their time and space complexity. Aim for at least 5-7 problems per day.

Questions

Commonly asked.

  • Design a system to handle live video streaming for millions of concurrent users.
  • How would you implement a real-time chat feature for Twitch?
  • Discuss a challenging technical problem you faced and how you solved it.
  • Explain the CAP theorem and its implications for distributed systems.
  • How do you approach performance optimization in a large-scale application?
  • Describe your experience with cloud platforms like AWS or GCP.
  • What are the trade-offs between SQL and NoSQL databases?
  • How would you design a recommendation system for Twitch content?
  • Tell me about a time you disagreed with a teammate or manager.
  • How do you stay up-to-date with new technologies?

Locations

Regional differences.

Fig · Regions — 03 locations

01 / 03

Location

San Francisco, USA

Interview focus

Deep dive into distributed systems and scalability challenges specific to live streaming.Understanding of real-time data processing and low-latency requirements.Experience with cloud-native architectures (AWS, GCP, Azure).Problem-solving in a fast-paced, high-availability environment.

Common questions

  • How would you design a real-time notification system for Twitch chat?
  • Discuss a time you had to deal with a large-scale data processing challenge.
  • Explain the trade-offs between different caching strategies for a high-traffic service.
  • How do you approach performance optimization in a distributed system?
  • Describe your experience with A/B testing and its impact on product development.

Tips

  • Familiarize yourself with Twitch's tech stack and common challenges in the live streaming industry.
  • Prepare examples of projects where you've dealt with massive concurrency and real-time data.
  • Be ready to discuss your contributions to open-source projects if applicable.
  • Understand the nuances of building and scaling services for a global audience.

Rounds

Round-by-round.

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

DSA

Coding questions at Twitch.

Frequently reported on Twitch loops

View all at Twitch

Other guides

More at Twitch.