# Software Engineer
**Role:** Software Engineer · **Level:** MTS5
**Company:** [Pure Storage](https://scaleengineer.com/companies/pure-storage)
**Difficulty:** Hard
**Salary:** US$170000 - US$220000
**Experience:** 7 - 10
**Timeline:** ~14 days
This interview process for a Software Engineer (MTS5) at Pure Storage is designed to assess a candidate's technical proficiency, problem-solving abilities, system design skills, and cultural fit within the company. The MTS5 level indicates a senior individual contributor role requiring significant experience and the ability to lead technical initiatives.
Canonical: https://scaleengineer.com/interviews/pure-storage/mts5-software-engineer
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## Overall evaluation

- Technical Skills
- Communication and Collaboration
- Behavioral and Cultural Fit

## Questions asked

- Design a distributed caching system.
- Implement a function to find the k-th largest element in an unsorted array.
- How would you design a system to handle millions of concurrent users for a real-time chat application?
- Describe a time you disagreed with a technical decision. What did you do?
- Explain the trade-offs between different consistency models in distributed databases.
- Write a function to detect cycles in a directed graph.
- How do you approach performance optimization in a large-scale application?
- Tell me about a challenging project you led. What were the key challenges and how did you overcome them?
- What are the differences between TCP and UDP, and when would you use each?
- Design a rate limiter for an API.

## Preparation tips

### lists

- Review core computer science fundamentals: data structures, algorithms, operating systems, and networking.
- Deep dive into distributed systems concepts: consensus algorithms, replication, consistency models, fault tolerance.
- Study system design principles for scalability, reliability, and performance.
- Practice coding problems, focusing on efficiency and clean code.
- Prepare to discuss your past projects and technical contributions in detail.
- Research Pure Storage's products and technologies to understand their business context.
- Prepare behavioral questions using the STAR method (Situation, Task, Action, Result).
- Understand common interview pitfalls and how to avoid them.

### studyPlan

- {"title":"Data Structures and Algorithms","longDescription":"Weeks 1-2: Focus on Data Structures and Algorithms. Cover arrays, linked lists, trees, graphs, hash tables, heaps, sorting, searching, dynamic programming, and graph traversal algorithms. Practice coding these concepts on platforms like LeetCode, HackerRank, or AlgoExpert. Aim for optimal time and space complexity.","shortDescription":"Weeks 1-2: DSA fundamentals and practice."}
- {"title":"Operating Systems and Networking","longDescription":"Weeks 3-4: Dive into Operating Systems and Networking. Review process management, memory management, concurrency, file systems, TCP/IP stack, HTTP/HTTPS, DNS, and load balancing. Understand how these concepts apply to distributed systems.","shortDescription":"Weeks 3-4: OS and Networking concepts."}
- {"title":"Distributed Systems and System Design","longDescription":"Weeks 5-6: Concentrate on Distributed Systems and System Design. Study concepts like CAP theorem, consistency models, distributed transactions, message queues, microservices architecture, caching strategies, and database design. Practice designing scalable systems for common scenarios (e.g., URL shortener, social media feed, distributed cache).","shortDescription":"Weeks 5-6: Distributed Systems and System Design."}
- {"title":"Company Research and Behavioral Preparation","longDescription":"Week 7: Focus on Pure Storage specific technologies and behavioral preparation. Research Pure Storage's product offerings (FlashArray, FlashBlade, Portworx) and recent news. Prepare detailed examples for behavioral questions using the STAR method, focusing on leadership, teamwork, problem-solving, and conflict resolution.","shortDescription":"Week 7: Pure Storage tech and Behavioral prep."}
- {"title":"Mock Interviews and Final Review","longDescription":"Week 8: Mock interviews and final review. Conduct mock interviews with peers or mentors covering all aspects of the process (DSA, System Design, Behavioral). Review notes, identify weak areas, and refine answers. Ensure you are comfortable articulating your thought process and experiences.","shortDescription":"Week 8: Mock interviews and final review."}

## Location differences

- {"location":"Santa Clara, USA","differences":{"tips":["Familiarize yourself with Pure Storage's core technologies (FlashArray, FlashBlade, Portworx).","Be prepared to discuss your contributions to open-source projects if applicable.","Highlight experience with performance tuning and debugging in complex environments."],"interviewFocus":["Deep dive into distributed systems and storage technologies relevant to Pure Storage's product portfolio.","Emphasis on practical experience with large-scale systems and performance optimization.","Understanding of cloud-native architectures and containerization (Kubernetes, Docker)."],"commonQuestions":["Discuss a complex technical challenge you faced and how you overcame it.","How do you approach designing a scalable and reliable distributed system?","Describe a time you had to mentor junior engineers. What was your approach?","What are your thoughts on the latest trends in cloud computing and storage technologies?"]}}
- {"location":"Remote","differences":{"tips":["Showcase your ability to work effectively in a remote or hybrid team setting.","Be ready to discuss your experience with various programming languages and frameworks.","Prepare examples that demonstrate leadership and problem-solving in a collaborative context."],"interviewFocus":["Strong emphasis on software development lifecycle, agile methodologies, and CI/CD practices.","Assessment of collaboration and communication skills within a global team.","Understanding of data structures, algorithms, and object-oriented design principles."],"commonQuestions":["How do you ensure code quality and maintainability in a fast-paced environment?","Describe a situation where you had to influence technical decisions across teams.","What are your strategies for handling technical debt?","How do you stay updated with emerging technologies in the software industry?"]}}

## Round 1: Technical Coding Round 1
**Type:** Data Structures and Algorithms · **Difficulty:** Hard · **Duration:** 60 min
Coding challenge focusing on DSA.
This round focuses on assessing your core data structures and algorithms knowledge. You will be presented with one or two coding problems, typically on a shared online editor. The interviewer will evaluate your ability to understand the problem, devise an efficient solution, write clean and correct code, and analyze its complexity. Expect follow-up questions to explore edge cases, optimizations, and alternative approaches.
**Interviewers look for:** A systematic approach to problem-solving.; Clean, efficient, and correct code.; Understanding of time and space complexity.; Ability to communicate thought process effectively.
**Evaluation criteria:** Problem-solving approach.; Algorithm and data structure knowledge.; Coding proficiency (clarity, efficiency, correctness).; Ability to handle follow-up questions and constraints.
**Common rejection reasons:** Inability to articulate thought process clearly.; Lack of fundamental understanding in core CS concepts.; Poor coding practices or inefficient solutions.; Failure to consider edge cases or constraints.
## Questions

- Given a binary tree, invert the tree.
- Find the median of two sorted arrays.
- Implement a Least Recently Used (LRU) cache.

## Preparation tips

- Practice coding problems regularly on platforms like LeetCode.
- Focus on understanding the underlying algorithms and data structures.
- Practice explaining your thought process out loud.
- Be prepared to write code without relying heavily on IDE features.
- Consider edge cases and constraints thoroughly.

## Round 2: System Design Round
**Type:** System Design · **Difficulty:** Hard · **Duration:** 60 min
Design a scalable system.
This round assesses your ability to design complex, scalable, and reliable systems. You'll be given an open-ended problem (e.g., design Twitter's feed, design a URL shortener) and expected to break it down, identify key components, discuss data models, APIs, scaling strategies, and potential bottlenecks. The focus is on your thought process and ability to make reasoned design decisions.
**Interviewers look for:** A structured approach to system design.; Consideration of various system components (databases, caching, load balancers, APIs).; Understanding of distributed system challenges.; Ability to justify design decisions and discuss trade-offs.
**Evaluation criteria:** System design principles (scalability, reliability, availability).; Trade-off analysis and justification of design choices.; Understanding of distributed systems concepts.; Ability to handle ambiguity and evolving requirements.
**Common rejection reasons:** Inability to design a scalable and robust system.; Overlooking critical components or failure modes.; Poor trade-off analysis.; Lack of clarity in explaining design choices.
## Questions

- Design a distributed key-value store.
- Design a system to count unique visitors to a website in real-time.
- Design the backend for a ride-sharing service like Uber.

## Preparation tips

- Study common system design patterns and architectures.
- Understand trade-offs between different technologies and approaches.
- Practice designing systems for various use cases.
- Be prepared to discuss databases, caching, message queues, and load balancing.
- Think about failure modes and how to build resilient systems.

## Round 3: Behavioral and Managerial Round
**Type:** Behavioral Interview · **Difficulty:** Medium · **Duration:** 45 min
Behavioral questions to assess fit and past experiences.
This round focuses on your past experiences and how they relate to the role and Pure Storage's culture. You'll be asked behavioral questions that require you to provide specific examples using the STAR method. The interviewer will assess your teamwork, leadership, problem-solving abilities, and overall fit within the company.
**Interviewers look for:** Evidence of past behavior that predicts future performance.; Alignment with Pure Storage's culture and values.; Strong communication and collaboration skills.; Self-awareness and a growth mindset.
**Evaluation criteria:** Behavioral competencies (teamwork, leadership, problem-solving).; Cultural fit and alignment with Pure Storage values.; Motivation and career aspirations.; Communication and interpersonal skills.
**Common rejection reasons:** Lack of alignment with company values.; Poor communication or interpersonal skills.; Inability to provide specific examples of past behavior.; Negative attitude or lack of enthusiasm.
## Questions

- Tell me about a time you failed. What did you learn from it?
- Describe a situation where you had to work with a difficult colleague.
- How do you prioritize your work when you have multiple competing deadlines?

## Preparation tips

- Prepare specific examples using the STAR method for common behavioral questions.
- Reflect on your strengths, weaknesses, and career goals.
- Research Pure Storage's mission, values, and culture.
- Be prepared to ask thoughtful questions about the team and company.

## Round 4: Executive/Leadership Round
**Type:** Executive/Leadership Interview · **Difficulty:** Hard · **Duration:** 45 min
Final round with senior leadership to assess vision and leadership.
This final round, often with a senior leader, focuses on your overall experience, leadership potential, and strategic thinking. They will likely ask about your career aspirations, how you approach technical leadership, and your vision for the future. This is also an opportunity for you to ask high-level questions about the company and the engineering organization.
**Interviewers look for:** A clear vision for technical growth and innovation.; Ability to influence and lead technical initiatives.; Experience in mentoring and developing other engineers.; Alignment with Pure Storage's long-term goals.
**Evaluation criteria:** Technical leadership and vision.; Strategic thinking and impact.; Mentorship and team development capabilities.; Overall cultural alignment and potential contribution to the team.
**Common rejection reasons:** Lack of alignment with the team's technical direction.; Inability to articulate vision or strategic thinking.; Poor cultural fit at a higher level.; Concerns about leadership or mentorship capabilities.
## Questions

- What is your vision for the future of storage technology?
- How would you foster innovation within an engineering team?
- Describe a time you had to make a difficult strategic decision.

## Preparation tips

- Think about your long-term career goals and how they align with Pure Storage.
- Prepare to discuss your leadership philosophy and experience.
- Consider how you can contribute to the company's strategic objectives.
- Have thoughtful questions ready for the senior leader.