Scale Engineer

Software Engineer

Software EngineerP2Medium to Hard

This interview process is for a Software Engineer position at Ciena, specifically for the P2 level. It aims to assess a candidate's technical skills, problem-solving abilities, and cultural fit within the organization.

Rounds·3

Timeline·~10d

Experience·2 - 5 yrs

Comp band·US$95000 - US$130000

Interview time·150 min

Evaluation

What they measure.

  • Problem-solving skills
  • Algorithmic thinking
  • Data structure knowledge
  • Code quality and efficiency
  • Debugging skills

Preparation

How to prepare.

Tips

  1. Review fundamental data structures and algorithms.
  2. Practice coding problems on platforms like LeetCode or HackerRank.
  3. Study system design principles and common architectural patterns.
  4. Understand core networking concepts and protocols (TCP/IP, HTTP, DNS).
  5. Prepare examples for behavioral questions using the STAR method (Situation, Task, Action, Result).
  6. Research Ciena's products, services, and recent news.
  7. Be ready to discuss your past projects and technical contributions in detail.

Study plan

Fig · Study plan — 05 phases

01 / 05
01

Phase 01 of 05

Data Structures and Algorithms

Weeks 1-2: Data Structures & Algorithms fundamentals. Practice 2-3 problems daily.

Weeks 1-2: Focus on core data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming, graph traversal). Practice implementing these in your preferred language. Solve at least 2-3 problems per day.

Questions

Commonly asked.

  • Write a function to find the kth smallest element in a sorted matrix.
  • Design a rate limiter for an API.
  • Explain the concept of eventual consistency.
  • Tell me about a time you disagreed with a technical decision and how you handled it.
  • How would you optimize a slow database query?
  • Describe the trade-offs between microservices and a monolithic architecture.
  • What are the challenges of working with distributed systems?
  • How do you ensure the security of a web application?
  • What is polymorphism and how is it implemented in your preferred language?
  • Describe a situation where you had to deal with ambiguity in requirements.

Locations

Regional differences.

Fig · Regions — 03 locations

01 / 03

Location

North America

Interview focus

System design and scalability for network infrastructure.Deep understanding of networking protocols.Problem-solving in distributed systems.Experience with cloud technologies (AWS, Azure, GCP).

Common questions

  • How would you design a system to handle real-time traffic data?
  • Describe a challenging technical problem you solved and your approach.
  • Explain the difference between TCP and UDP.
  • What are the principles of RESTful API design?
  • How do you ensure code quality and maintainability?

Tips

  • Familiarize yourself with Ciena's product portfolio, especially in networking and telecommunications.
  • Be prepared to discuss your experience with large-scale distributed systems.
  • Highlight any contributions to open-source projects related to networking.
  • Practice explaining complex technical concepts clearly and concisely.

Rounds

Round-by-round.

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

Other guides

More at ciena.