# L6
**Role:** Software Engineer · **Level:** Software Engineer 2
**Company:** [General Motors](https://scaleengineer.com/companies/general-motors)
**Difficulty:** Hard
**Salary:** US$140000 - US$180000
**Experience:** 6 - 10
**Timeline:** ~14 days
This interview process is for a Software Engineer L6 position at General Motors, focusing on assessing candidates for a Software Engineer 2 level role. The process is designed to evaluate technical proficiency, problem-solving skills, system design capabilities, and cultural fit within the organization.
Canonical: https://scaleengineer.com/interviews/general-motors/software-engineer-2-software-engineer
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## Overall evaluation

- Technical Skills & Problem Solving
- System Design & Architecture
- Communication & Collaboration
- Leadership & Growth Potential

## Questions asked

- Describe a challenging project you led from conception to completion.
- How would you design a system to manage millions of connected vehicles and their data streams?
- Tell me about a time you disagreed with a technical decision made by your team or manager. How did you handle it?
- What are the trade-offs between monolithic and microservices architectures?
- How do you ensure the security and privacy of user data in a large-scale application?
- Explain the concept of eventual consistency and when it might be appropriate.
- Describe your experience with CI/CD pipelines and automated testing.
- How do you approach debugging complex distributed systems?
- What are your thoughts on the future of automotive software development?
- Tell me about a time you failed. What did you learn from it?

## Preparation tips

### lists

- Thoroughly review your resume and be prepared to discuss all projects and experiences in detail.
- Brush up on core computer science fundamentals, including data structures, algorithms, and operating systems.
- Practice coding problems, focusing on efficiency and clarity of solutions.
- Study system design principles and common architectural patterns.
- Prepare to discuss your leadership style and experience mentoring others.
- Research General Motors' mission, values, and recent technological advancements.
- Prepare questions to ask the interviewers about the role, team, and company culture.

### studyPlan

- {"title":"Data Structures & Algorithms","longDescription":"Weeks 1-2: Focus on Data Structures and Algorithms. Cover arrays, linked lists, trees, graphs, hash tables, sorting, searching, dynamic programming, and greedy algorithms. Practice problems on platforms like LeetCode, HackerRank, and GeeksforGeeks, aiming for medium to hard difficulty.","shortDescription":"Weeks 1-2: DSA fundamentals and practice (medium/hard)."}
- {"title":"System Design","longDescription":"Weeks 3-4: Dive into System Design. Study concepts like scalability, availability, reliability, consistency, load balancing, caching, databases (SQL vs. NoSQL), message queues, and microservices architecture. Review common system design interview questions and practice designing systems like Twitter feed, URL shortener, or a ride-sharing service.","shortDescription":"Weeks 3-4: System Design principles and practice."}
- {"title":"Behavioral & Leadership","longDescription":"Week 5: Behavioral and Leadership Preparation. Reflect on your past experiences using the STAR method (Situation, Task, Action, Result) to answer behavioral questions related to teamwork, conflict resolution, leadership, and failure. Prepare examples that showcase your strengths and alignment with GM's values.","shortDescription":"Week 5: Behavioral questions and STAR method."}
- {"title":"Company & Role Specifics","longDescription":"Week 6: Domain-Specific Knowledge and Company Research. Research General Motors' current projects, technologies, and challenges, especially in areas like connected vehicles, autonomous driving, and electric vehicles. Understand the specific requirements of the Software Engineer L6 role and tailor your preparation accordingly.","shortDescription":"Week 6: GM research and role-specific preparation."}

## Location differences

- {"location":"Detroit, MI","differences":{"tips":["Be prepared to discuss specific examples of large-scale system design and implementation.","Highlight any experience with automotive software development or related domains.","Showcase your ability to lead technical discussions and mentor team members."],"interviewFocus":["Emphasis on practical application of distributed systems principles.","Assessment of leadership potential and team collaboration.","Understanding of automotive industry specific challenges and solutions."],"commonQuestions":["Describe a complex technical challenge you faced in a previous role and how you overcame it.","How do you approach designing a scalable microservices architecture for a new product?","Tell me about a time you had to mentor junior engineers. What was your approach?","What are your thoughts on the latest trends in cloud computing and how might they apply to automotive software?"]}}
- {"location":"Austin, TX","differences":{"tips":["Prepare to discuss your experience with big data technologies and streaming platforms.","Be ready to share examples of how you've improved development processes.","Demonstrate a proactive approach to learning and adopting new technologies."],"interviewFocus":["Focus on data engineering and real-time systems.","Evaluation of adaptability to fast-paced development environments.","Understanding of software development lifecycle and best practices."],"commonQuestions":["How would you design a real-time data processing pipeline for vehicle telemetry?","Discuss your experience with agile methodologies and how you've adapted them.","What are your strategies for ensuring code quality and maintainability in a large codebase?","How do you stay updated with emerging technologies in software development?"]}}

## Round 1: Data Structures and Algorithms
**Type:** Technical Coding Interview · **Difficulty:** Hard · **Duration:** 60 min
Assess core programming skills with coding challenges.
This round focuses on assessing your core programming skills and problem-solving abilities. You will be presented with one or two coding challenges, typically involving data structures and algorithms. The interviewer will evaluate your approach to understanding the problem, devising a solution, writing clean and efficient code, and testing it thoroughly. Expect to discuss time and space complexity, as well as potential optimizations.
**Interviewers look for:** Strong grasp of data structures and algorithms.; Ability to translate a problem into efficient code.; Clear communication of problem-solving strategy.; Attention to detail and edge case handling.
**Evaluation criteria:** Correctness of the algorithm.; Efficiency of the solution (time and space complexity).; Code clarity, readability, and maintainability.; Ability to handle edge cases and constraints.; Communication of the thought process.
**Common rejection reasons:** Inability to articulate thought process clearly.; Lack of depth in understanding fundamental algorithms.; Inefficient or incorrect coding solutions.; Poor handling of edge cases.
## Questions

- Given a binary tree, invert the tree.
- Find the kth largest element in an unsorted array.
- Implement a function to determine if a string is a valid palindrome, considering only alphanumeric characters and ignoring cases.

## Preparation tips

- Practice coding problems on platforms like LeetCode, HackerRank, or AlgoExpert.
- Focus on understanding the underlying data structures and algorithms.
- Practice explaining your thought process out loud as you code.
- Be prepared to discuss trade-offs between different approaches.
- Ensure your code is well-formatted and readable.

## Round 2: System Design & Architecture
**Type:** System Design Interview · **Difficulty:** Hard · **Duration:** 60 min
Assess ability to design scalable and robust software systems.
This round evaluates your ability to design and architect complex software systems. You'll be given an open-ended problem, such as designing a social media feed, a ride-sharing service, or a large-scale data processing pipeline. The interviewer will assess your ability to break down the problem, identify key components, choose appropriate technologies, and discuss trade-offs related to scalability, performance, reliability, and cost.
**Interviewers look for:** Ability to design complex systems from scratch.; Understanding of distributed systems concepts.; Knowledge of databases, caching, load balancing, and messaging queues.; Ability to articulate and justify design decisions.; Consideration of non-functional requirements like performance, security, and availability.
**Evaluation criteria:** Understanding of system design principles.; Ability to design scalable, reliable, and maintainable systems.; Consideration of trade-offs and constraints.; Knowledge of various architectural patterns and technologies.; Clarity and structure of the design proposal.
**Common rejection reasons:** Lack of clarity in system design.; Failure to consider scalability and reliability.; Ignoring important components or trade-offs.; Inability to justify design choices.
## Questions

- Design a URL shortening service like Bitly.
- Design a system to track the real-time location of millions of vehicles.
- Design a distributed cache system.

## Preparation tips

- Study common system design patterns and architectural styles.
- Understand concepts like CAP theorem, eventual consistency, and ACID properties.
- Practice designing various systems, focusing on scalability and availability.
- Be prepared to discuss trade-offs between different database solutions, caching strategies, and communication protocols.
- Familiarize yourself with cloud platforms (AWS, Azure, GCP) and their services.

## Round 3: Behavioral & Leadership
**Type:** Behavioral and Leadership Interview · **Difficulty:** Medium · **Duration:** 45 min
Assess behavioral traits, teamwork, and leadership potential.
This round focuses on your behavioral and leadership qualities. You'll be asked questions about your past experiences, how you handle specific situations, and your approach to teamwork, conflict resolution, and leadership. The goal is to understand your working style, your ability to collaborate, and your potential to grow within the team and the company. Use the STAR method (Situation, Task, Action, Result) to structure your answers.
**Interviewers look for:** Evidence of collaboration and teamwork.; Ability to handle conflict and difficult situations.; Examples of leadership and mentorship.; Proactive problem-solving and initiative.; Alignment with GM's culture and values.
**Evaluation criteria:** Communication skills.; Teamwork and collaboration abilities.; Problem-solving approach in real-world scenarios.; Leadership potential and initiative.; Cultural fit and alignment with company values.
**Common rejection reasons:** Lack of clear examples to support claims.; Inability to articulate past experiences effectively.; Poor alignment with company values or team dynamics.; Defensiveness when discussing failures or challenges.
## Questions

- Tell me about a time you had to work with a difficult team member. How did you handle it?
- Describe a situation where you took initiative to improve a process or product.
- How do you prioritize your work when you have multiple competing deadlines?
- Tell me about a time you failed. What did you learn from it?

## Preparation tips

- Prepare specific examples using the STAR method for common behavioral questions.
- Reflect on your strengths, weaknesses, and career aspirations.
- Think about times you demonstrated leadership, teamwork, and problem-solving skills.
- Be ready to discuss your motivations for applying to General Motors.
- Show enthusiasm and a positive attitude.

## Round 4: Executive / Director Level Discussion
**Type:** Managerial / Leadership Interview · **Difficulty:** Hard · **Duration:** 45 min
Assess technical vision, leadership, and strategic alignment.
This final round is typically with a senior leader, such as a Director or VP. The focus is on your overall technical vision, leadership capabilities, and strategic thinking. You'll discuss your experience in leading teams, driving technical initiatives, and aligning technology with business goals. This is also an opportunity for you to ask high-level questions about the company's direction and culture.
**Interviewers look for:** Strategic thinking and long-term vision.; Ability to lead and mentor technical teams.; Understanding of how technology drives business value.; Strong communication and influencing skills.; Alignment with the company's technical roadmap.
**Evaluation criteria:** Technical vision and strategic thinking.; Ability to influence and lead technical direction.; Understanding of business objectives and how technology supports them.; Communication of complex ideas to diverse audiences.; Alignment with the team's and company's long-term goals.
**Common rejection reasons:** Lack of alignment on technical vision or strategy.; Poor communication of high-level ideas.; Inability to connect technical solutions to business goals.; Mismatch in expectations regarding role and responsibilities.
## Questions

- What is your vision for the future of software development in the automotive industry?
- How do you foster innovation within a technical team?
- Describe a time you had to make a significant technical decision with incomplete information.

## Preparation tips

- Understand the company's strategic goals and how technology contributes to them.
- Be prepared to discuss your leadership philosophy and experience.
- Think about how you would contribute to the technical vision of the organization.
- Articulate your career aspirations and how they align with opportunities at GM.
- Prepare thoughtful questions for the senior leader.