Scale Engineer

Software Engineer

Software EngineerPrincipal Software EngineerHigh

Chewy is looking for a Principal Software Engineer to join our dynamic team. This role involves leading the design, development, and implementation of complex software solutions, mentoring junior engineers, and driving technical strategy. We are seeking experienced individuals with a proven track record of delivering high-quality, scalable, and maintainable software.

Rounds·5

Timeline·~14d

Experience·8 - 15 yrs

Comp band·US$170000 - US$220000

Interview time·225 min

Evaluation

What they measure.

  • Technical depth and breadth in relevant technologies.
  • System design and architectural thinking.
  • Problem-solving and analytical skills.
  • Leadership potential and ability to mentor.
  • Communication and collaboration skills.
  • Cultural fit and alignment with Chewy's values.

Preparation

How to prepare.

Tips

  1. Review core computer science fundamentals, including data structures and algorithms.
  2. Deepen your understanding of distributed systems, microservices, and cloud architecture.
  3. Practice system design problems, focusing on scalability, reliability, and trade-offs.
  4. Prepare to discuss your past projects in detail, highlighting your contributions and technical decisions.
  5. Brush up on behavioral interview questions, using the STAR method (Situation, Task, Action, Result).
  6. Research Chewy's technology stack and business domain.
  7. Prepare thoughtful questions to ask the interviewers about the role, team, and company culture.

Study plan

Fig · Study plan — 05 phases

01 / 05
01

Phase 01 of 05

Data Structures & Algorithms

Weeks 1-2: Data Structures & Algorithms fundamentals. Practice implementation and complexity analysis.

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/space complexity. Review common Big O notations.

Questions

Commonly asked.

  • Describe a complex system you designed or significantly contributed to. What were the key challenges and how did you address them?
  • How would you design a system to handle millions of concurrent users for a real-time notification service?
  • Tell me about a time you had to make a difficult technical decision with incomplete information. What was the outcome?
  • How do you mentor and grow other engineers on your team?
  • What are your strategies for ensuring the long-term maintainability and scalability of a software system?
  • Discuss your experience with performance optimization. Provide an example of a performance bottleneck you identified and resolved.
  • How do you stay updated with the latest technologies and industry trends?
  • Describe a situation where you disagreed with your manager or a senior colleague on a technical approach. How did you handle it?
  • What are the trade-offs between monolithic and microservices architectures?
  • How do you approach testing in a distributed system?

Locations

Regional differences.

Fig · Regions — 02 locations

01 / 02

Location

Seattle, WA

Interview focus

Deep understanding of distributed systems and microservices architecture.Proven ability to lead technical initiatives and mentor teams.Strong problem-solving skills and strategic thinking.Experience with cloud platforms (AWS, Azure, GCP) and containerization (Docker, Kubernetes).Excellent communication and collaboration skills.

Common questions

  • How do you handle technical debt in a large-scale system?
  • Describe a time you had to influence a team to adopt a new technology or process.
  • What are your strategies for ensuring code quality and maintainability in a distributed environment?
  • Discuss a challenging architectural decision you made and its impact.
  • How do you balance innovation with stability in production systems?

Tips

  • Be prepared to discuss your experience with large-scale system design and architecture.
  • Highlight instances where you've led technical projects or mentored other engineers.
  • Emphasize your understanding of cloud-native technologies and best practices.
  • Showcase your ability to think critically and solve complex problems.
  • Prepare specific examples that demonstrate your leadership and influence.

Rounds

Round-by-round.

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

DSA

Coding questions at Chewy.

Frequently reported on Chewy loops

View all at Chewy

Other guides

More at Chewy.