# Software Engineer
**Role:** Software Engineer · **Level:** L4
**Company:** [Grammarly](https://scaleengineer.com/companies/grammarly)
**Difficulty:** Medium to Hard
**Salary:** US$120000 - US$160000
**Experience:** 3 - 7
**Timeline:** ~14 days
The Grammarly Software Engineer L4 interview process is designed to assess a candidate's technical proficiency, problem-solving abilities, and cultural fit within the company. It typically involves multiple rounds, including technical screenings, coding challenges, system design discussions, and behavioral interviews.
Canonical: https://scaleengineer.com/interviews/grammarly/l4-software-engineer
---
## Overall evaluation

- Technical Skills
- Communication
- Behavioral and Cultural Fit

## Questions asked

- Given an array of integers, find the contiguous subarray with the largest sum.
- Design a system to recommend articles to users based on their reading history.
- Explain the concept of Big O notation and its importance.
- Describe a situation where you had to disagree with a team member or manager. How did you handle it?
- How would you optimize a slow-performing database query?
- Implement a function to reverse a linked list.
- What are the advantages and disadvantages of using microservices?
- Tell me about a time you had to learn a new technology quickly.
- Design a rate limiter for an API.
- What is a deadlock and how can it be prevented?

## Preparation tips

### lists

- Review fundamental data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming, graph traversal).
- Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte, focusing on medium to hard difficulty.
- Study system design concepts, including scalability, availability, databases, caching, load balancing, and API design.
- Prepare for behavioral questions by recalling specific examples from your past experiences using the STAR method (Situation, Task, Action, Result).
- Understand Grammarly's mission, values, and products to demonstrate genuine interest and cultural alignment.
- Practice explaining your solutions and thought processes clearly and concisely.
- Research common interview questions for Software Engineer roles at similar tech companies.

### studyPlan

- {"title":"Data Structures and Algorithms","longDescription":"Weeks 1-2: Focus on core data structures and algorithms. Cover arrays, linked lists, stacks, queues, trees (binary trees, BSTs, AVL trees), heaps, hash tables, and graphs. Practice algorithms like sorting (quicksort, mergesort), searching (binary search), recursion, dynamic programming, and graph traversal (BFS, DFS). Aim to solve at least 5-10 problems per data structure/algorithm type.","shortDescription":"Weeks 1-2: Data Structures & Algorithms fundamentals. Solve 5-10 problems per topic."}
- {"title":"System Design","longDescription":"Weeks 3-4: Dive into system design. Study concepts like distributed systems, microservices, databases (SQL vs. NoSQL), caching strategies, load balancing, message queues, and API design. Practice designing common systems like URL shorteners, social media feeds, or chat applications. Understand trade-offs and scalability considerations.","shortDescription":"Weeks 3-4: System Design concepts. Practice designing scalable systems."}
- {"title":"Behavioral and Situational Questions","longDescription":"Week 5: Prepare for behavioral and situational questions. Reflect on your past projects and experiences. Identify examples that demonstrate leadership, teamwork, problem-solving, handling conflict, and learning from mistakes. Practice articulating these experiences using the STAR method.","shortDescription":"Week 5: Behavioral questions preparation. Use STAR method."}
- {"title":"Mock Interviews and Review","longDescription":"Week 6: Mock interviews and review. Conduct mock interviews with peers or mentors to simulate the interview environment. Focus on receiving feedback on your technical explanations, problem-solving approach, and communication. Review any weak areas identified during practice.","shortDescription":"Week 6: Mock interviews and review weak areas."}

## Location differences

- {"location":"San Francisco","differences":{"tips":["Be prepared to whiteboard solutions for coding problems.","Practice explaining your thought process clearly.","Research Grammarly's products and values.","Prepare specific examples for behavioral questions using the STAR method."],"interviewFocus":["Emphasis on practical application of data structures and algorithms.","Assessment of system design skills for scalable applications.","Evaluation of communication and collaboration abilities.","Understanding of core computer science principles."],"commonQuestions":["How would you design a URL shortener service?","Discuss a time you had to deal with a difficult stakeholder.","Explain the difference between SQL and NoSQL databases.","Describe a challenging technical problem you solved and how you approached it."]}}
- {"location":"Kyiv","differences":{"tips":["Be ready to discuss trade-offs in system design choices.","Highlight your contributions and impact in past projects.","Showcase your ability to learn and adapt to new technologies.","Ask insightful questions about the team and the role."],"interviewFocus":["Strong focus on distributed systems and scalability.","Evaluation of problem-solving in a collaborative environment.","Assessment of adaptability and learning agility.","Understanding of software development best practices."],"commonQuestions":["Design an API for a real-time chat application.","Tell me about a project you are particularly proud of.","How do you handle code reviews?","What are your thoughts on microservices architecture?"]}}
- {"location":"Remote","differences":{"tips":["Practice coding problems with a focus on efficiency.","Be prepared to discuss trade-offs in different architectural approaches.","Demonstrate a proactive approach to problem-solving.","Showcase your understanding of testing methodologies."],"interviewFocus":["Deep dive into algorithmic complexity and optimization.","Assessment of architectural design patterns.","Evaluation of debugging and troubleshooting skills.","Understanding of software development lifecycle."],"commonQuestions":["How would you design a system to handle millions of concurrent users?","Describe a time you failed and what you learned from it.","What are the principles of object-oriented programming?","How do you ensure code quality?"]}}

## Round 1: Recruiter Screen
**Type:** Recruiter Screen · **Difficulty:** Medium · **Duration:** 45 min
Initial screening to assess basic qualifications and cultural fit.
This initial screening call is conducted by a recruiter or hiring manager to assess your overall fit for the role and Grammarly. They will discuss your resume, career goals, and motivation for applying. They will also ask some high-level behavioral and technical questions to gauge your experience and communication skills.
**Interviewers look for:** Logical thinking; Ability to translate requirements into code; Understanding of basic algorithms and data structures; Clear communication of approach
**Evaluation criteria:** Problem-solving approach; Correctness of code; Efficiency of solution (time and space complexity); Coding style and readability; Communication of thought process
**Common rejection reasons:** Inability to articulate thought process.; Poor understanding of fundamental data structures and algorithms.; Inefficient or incorrect code solutions.; Lack of clarity in communication.
## Questions

- Tell me about yourself and your background.
- Why are you interested in Grammarly?
- What are your strengths and weaknesses?
- Describe a challenging project you worked on.

## Preparation tips

- Be ready to talk about your resume and career aspirations.
- Research Grammarly's mission and values.
- Prepare a concise summary of your key skills and experiences.
- Think about why you are interested in this specific role at Grammarly.

## Round 2: Technical Coding Interview
**Type:** Technical Phone Screen / Coding Interview · **Difficulty:** Hard · **Duration:** 60 min
Assess core coding skills with data structures and algorithms problems.
This round focuses on your core technical skills. You will be asked to solve one or two coding problems, typically involving data structures and algorithms. The interviewer will assess your ability to understand the problem, devise an efficient solution, implement it correctly, and explain your thought process and the complexity of your solution.
**Interviewers look for:** Strong grasp of fundamental algorithms and data structures.; Ability to write clean, efficient, and bug-free code.; Logical approach to problem-solving.; Clear explanation of the solution and its complexity.
**Evaluation criteria:** Problem-solving skills; Data structure and algorithm knowledge; Code implementation quality; Efficiency of the solution; Ability to handle edge cases
**Common rejection reasons:** Inability to solve coding problems efficiently.; Poor understanding of time and space complexity.; Difficulty in explaining the solution.; Not considering edge cases.
## Questions

- Given a binary tree, find its inorder traversal.
- Find the kth largest element in an unsorted array.
- Implement a function to check if a string is a palindrome.
- Given two sorted arrays, merge them into a single sorted array.

## Preparation tips

- Practice coding problems on platforms like LeetCode, focusing on medium to hard difficulty.
- Be prepared to write code in a shared editor or on a whiteboard.
- Think out loud and explain your approach before coding.
- Consider edge cases and test your solution thoroughly.
- Understand the time and space complexity of your algorithms.

## Round 3: System Design Interview
**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 software systems. You will be presented with a high-level problem (e.g., design a URL shortener, a social media feed, or a chat application) and expected to discuss various aspects of the design, including data models, APIs, scalability, reliability, and potential bottlenecks. You'll need to justify your design choices and discuss trade-offs.
**Interviewers look for:** Ability to design complex systems from scratch.; Understanding of distributed systems, databases, caching, and load balancing.; Sound reasoning for design choices and trade-offs.; Clear and structured communication of the design.
**Evaluation criteria:** System design principles; Scalability and performance considerations; Trade-off analysis; Database design; API design; Clarity of explanation
**Common rejection reasons:** Inability to design scalable and robust systems.; Lack of understanding of distributed system concepts.; Poor trade-off analysis.; Difficulty in communicating design choices.
## Questions

- Design a URL shortening service like bit.ly.
- Design a news feed system for a social media platform.
- Design a system to handle real-time notifications.
- Design an API for a ride-sharing service.

## Preparation tips

- Study common system design patterns and concepts.
- Practice designing various systems, focusing on scalability and availability.
- Be prepared to discuss databases, caching, load balancing, and message queues.
- Clearly articulate your design choices and the reasoning behind them.
- Consider different approaches and their trade-offs.

## Round 4: Behavioral and Cultural Fit Interview
**Type:** Behavioral Interview · **Difficulty:** Medium · **Duration:** 45 min
Assess behavioral competencies, teamwork, and cultural fit.
This interview focuses on your behavioral competencies and how you work within a team. You'll be asked questions about your past experiences, focusing on situations that demonstrate your collaboration skills, problem-solving approach in a team context, leadership potential, and how you handle challenges. The goal is to understand if you'll be a good cultural fit for Grammarly.
**Interviewers look for:** Evidence of collaboration and teamwork.; Ability to handle conflict and difficult situations constructively.; Proactiveness and ownership.; Alignment with Grammarly's culture and values.; Growth mindset.
**Evaluation criteria:** Teamwork and collaboration; Communication skills; Problem-solving approach in team settings; Adaptability and learning agility; Cultural fit with Grammarly's values
**Common rejection reasons:** Lack of alignment with company values.; Poor communication or interpersonal skills.; Inability to provide specific examples for behavioral questions.; Lack of enthusiasm or engagement.
## Questions

- Describe a time you had a conflict with a colleague and how you resolved it.
- Tell me about a time you failed. What did you learn?
- How do you prioritize your work when you have multiple competing deadlines?
- Describe a situation where you had to influence others. What was the outcome?

## Preparation tips

- Prepare specific examples using the STAR method for common behavioral questions.
- Reflect on your experiences with teamwork, conflict resolution, and leadership.
- Understand Grammarly's core values and how your experiences align with them.
- Be ready to discuss your career goals and how this role fits into them.