Grammarly

Software Engineer

Software EngineerL6Hard

Grammarly's Software Engineer L6 interview process is designed to assess a candidate's technical expertise, problem-solving abilities, system design skills, and cultural fit. The process typically involves multiple rounds, including technical screenings, coding challenges, system design discussions, and behavioral interviews.

Rounds

4

Timeline

~14 days

Experience

5 - 10 yrs

Salary Range

US$140000 - US$180000

Total Duration

180 min

Overall Evaluation Criteria

Technical Skills

Technical Proficiency: Depth of knowledge in relevant programming languages, data structures, algorithms, and system design.
Problem-Solving Skills: Ability to analyze complex problems, break them down, and devise efficient solutions.
System Design: Capacity to design scalable, reliable, and maintainable systems.
Communication: Clarity and effectiveness in explaining technical concepts and collaborating with others.
Cultural Fit: Alignment with Grammarly's values, teamwork, and learning mindset.

Behavioral and Leadership

Leadership Potential: Ability to mentor, guide, and influence technical decisions.
Adaptability: Willingness to learn new technologies and adapt to changing requirements.
Ownership: Taking responsibility for projects and driving them to completion.
Collaboration: Working effectively with cross-functional teams.

Preparation Tips

1Review core computer science concepts: data structures, algorithms, operating systems, databases.
2Practice coding problems on platforms like LeetCode, HackerRank, focusing on medium to hard difficulty.
3Study system design principles and common architectural patterns (microservices, caching, load balancing, etc.).
4Prepare to discuss your past projects in detail, highlighting your contributions and technical challenges.
5Research Grammarly's products, mission, and values.
6Practice behavioral questions using the STAR method (Situation, Task, Action, Result).
7Understand the technologies commonly used at Grammarly (e.g., Python, JavaScript, AWS, React).

Study Plan

1

Data Structures and Algorithms

Weeks 1-2: DSA fundamentals and practice (Easy/Medium).

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 LeetCode (Easy/Medium).

2

System Design

Weeks 3-4: System Design principles and case studies.

Weeks 3-4: Deep dive into System Design. Study topics like scalability, availability, reliability, databases (SQL vs. NoSQL), caching strategies, message queues, load balancing, and API design. Review common system design interview questions and case studies.

3

Behavioral and Company Fit

Week 5: Behavioral questions preparation (STAR method) and company research.

Week 5: Behavioral preparation. Prepare stories for common behavioral questions related to teamwork, leadership, conflict resolution, and handling failure. Use the STAR method. Research Grammarly's culture and values.

4

Mock Interviews and Review

Week 6: Mock interviews and final review.

Week 6: Mock interviews and final review. Conduct mock interviews for both coding and system design. Review any weak areas identified. Prepare questions to ask the interviewer.

Commonly Asked Questions

Design a system to detect and correct grammatical errors in real-time.
How would you scale a service that handles millions of user requests per day?
Describe a situation where you disagreed with a technical decision and how you handled it.
What are the trade-offs between monolithic and microservices architectures?
Implement a function to find the longest common prefix among a list of strings.
How do you approach performance optimization for a web application?
Tell me about a time you failed and what you learned from it.
Design a URL shortening service like bit.ly.
Explain the concept of eventual consistency.
How do you ensure the quality and reliability of your code?

Location-Based Differences

San Francisco Bay Area

Interview Focus

Deep dive into distributed systems and scalability.Emphasis on architectural patterns and trade-offs.Experience with large-scale data processing and analytics.Leadership and mentorship capabilities.

Common Questions

How would you design a real-time collaborative editor like Grammarly?

Discuss a challenging technical problem you solved and how you approached it.

Explain the trade-offs between different database technologies for a large-scale application.

How do you ensure code quality and maintainability in a large codebase?

Describe your experience with cloud platforms (AWS, GCP, Azure) and their services.

Tips

Be prepared to discuss your experience with microservices architecture.
Familiarize yourself with common cloud-native technologies.
Highlight any experience with performance optimization and monitoring.
Showcase your ability to lead technical discussions and mentor junior engineers.

Kyiv

Interview Focus

Strong emphasis on core computer science fundamentals.Problem-solving and algorithmic thinking.Experience with building and scaling web applications.Collaboration and communication skills.

Common Questions

How would you design a grammar checking engine?

Discuss a time you had to deal with ambiguity in requirements.

Explain the principles of asynchronous programming and its applications.

How do you approach debugging complex issues in a production environment?

Describe your experience with CI/CD pipelines and best practices.

Tips

Brush up on data structures and algorithms, especially those related to string manipulation and text processing.
Be ready to discuss your experience with JavaScript, Python, or other relevant programming languages.
Prepare examples of how you've contributed to team success and resolved conflicts.
Understand Grammarly's product and its technical challenges.

Process Timeline

1
Coding Interview45m
2
System Design60m
3
Behavioral Interview45m
4
Hiring Manager Interview30m

Interview Rounds

4-step process with detailed breakdown for each round

1

Coding Interview

Live coding session to assess problem-solving and coding skills.

Technical Screening (Coding)Medium
45 minSoftware Engineer

This round typically involves a live coding session, often on a shared editor. The interviewer will present a problem, and you'll be expected to write code to solve it while explaining your approach. The focus is on your ability to translate a problem into working, efficient code.

What Interviewers Look For

Clean, well-structured, and efficient code.Ability to explain the thought process and justify choices.Understanding of time and space complexity.Testing and edge case handling.

Evaluation Criteria

Coding proficiency
Problem-solving approach
Understanding of data structures and algorithms
Code clarity and efficiency

Questions Asked

Given a string, find the length of the longest substring without repeating characters.

StringSliding WindowHash Table

Implement a function to reverse a linked list.

Linked ListPointers

Find the kth largest element in an unsorted array.

ArraySortingHeap

Preparation Tips

1Practice coding problems under timed conditions.
2Focus on explaining your thought process as you code.
3Be prepared to discuss time and space complexity.
4Write clean, readable code with proper variable names and comments.

Common Reasons for Rejection

Inability to articulate thought process clearly.
Lack of understanding of fundamental data structures and algorithms.
Poor coding practices (e.g., no error handling, inefficient solutions).
2

System Design

Design a large-scale system, discussing architecture, scalability, and trade-offs.

System Design InterviewHard
60 minSenior Software Engineer / Engineering Manager

This round focuses on your ability to design large-scale, distributed systems. You'll be given an open-ended problem (e.g., design Twitter's feed, design a URL shortener) and expected to discuss various aspects of the system, including data models, APIs, scalability, and potential bottlenecks.

What Interviewers Look For

Ability to design complex systems from scratch.Understanding of distributed systems, databases, caching, and messaging.Consideration of various constraints and requirements.Clear articulation of design decisions and justifications.

Evaluation Criteria

System design principles
Scalability and performance
Reliability and availability
Trade-off analysis
Clarity of communication

Questions Asked

Design a system like Google Maps.

System DesignScalabilityDatabasesAPIs

Design a rate limiter.

System DesignDistributed SystemsAlgorithms

Design a notification service.

System DesignMessaging QueuesScalability

Preparation Tips

1Study common system design patterns and architectures.
2Practice designing various types of systems.
3Be prepared to discuss trade-offs between different design choices.
4Think about scalability, reliability, and maintainability.
5Draw diagrams to illustrate your design.

Common Reasons for Rejection

Inability to design a scalable and robust system.
Lack of consideration for trade-offs and edge cases.
Poor understanding of distributed systems concepts.
Not being able to communicate design choices effectively.
3

Behavioral Interview

Assess behavioral competencies, cultural fit, and past experiences.

Behavioral InterviewMedium
45 minHiring Manager / Senior Team Member

This round assesses your behavioral competencies and cultural fit. You'll be asked questions about your past experiences, how you handle specific situations, and your motivations. The goal is to understand how you work, collaborate, and align with Grammarly's culture.

What Interviewers Look For

Examples of leadership, teamwork, and problem-solving.Honesty and self-awareness.Alignment with Grammarly's core values.Enthusiasm for the role and the company.

Evaluation Criteria

Behavioral competencies
Teamwork and collaboration
Problem-solving approach in past situations
Cultural alignment
Motivation and passion

Questions Asked

Tell me about a time you had to work with a difficult colleague.

BehavioralTeamworkConflict Resolution

Describe a project you are particularly proud of and your role in it.

BehavioralProject ExperienceOwnership

How do you stay updated with new technologies?

BehavioralLearningAdaptability

Preparation Tips

1Prepare specific examples using the STAR method.
2Reflect on your strengths, weaknesses, and career goals.
3Understand Grammarly's mission, values, and culture.
4Be prepared to discuss why you are interested in this role and company.

Common Reasons for Rejection

Lack of alignment with company values.
Poor communication or interpersonal skills.
Inability to provide specific examples of past experiences.
Negative attitude or lack of enthusiasm.
4

Hiring Manager Interview

Final discussion with the hiring manager to assess overall fit and career aspirations.

Managerial / Fit InterviewMedium
30 minHiring Manager

This final round is typically with the hiring manager. It's an opportunity for the manager to assess your overall fit for the team and the role, discuss your career aspirations, and answer any remaining questions you might have. They will also gauge your understanding of how your work impacts the business.

What Interviewers Look For

Understanding of how their work contributes to the broader business objectives.Ability to communicate technical concepts to a non-technical audience.Enthusiasm for the role and potential for growth.Good questions about the team, role, and company.

Evaluation Criteria

Alignment with team goals
Understanding of business impact
Communication skills
Motivation and career aspirations

Questions Asked

What are your long-term career goals?

BehavioralCareer Goals

How do you prioritize your work when faced with multiple competing tasks?

BehavioralTime ManagementPrioritization

What do you know about Grammarly's business strategy?

Company KnowledgeBusiness Acumen

Preparation Tips

1Think about how your skills and experience align with the team's goals.
2Prepare thoughtful questions about the role, team dynamics, and company strategy.
3Be ready to discuss your career goals and how this role fits into them.
4Reiterate your enthusiasm for the position.

Common Reasons for Rejection

Lack of strategic thinking.
Inability to connect technical solutions to business goals.
Poor communication with non-technical stakeholders.
Unrealistic expectations about the role or team.

Commonly Asked DSA Questions

Frequently asked coding questions at Grammarly

View all
Generate ParenthesesMEDIUMSearch in Rotated Sorted ArrayMEDIUMTrapping Rain WaterHARDMerge IntervalsMEDIUMUnique PathsMEDIUMSqrt(x)EASYClimbing StairsEASYWord SearchMEDIUMClone GraphMEDIUMWord BreakMEDIUM