How long does the Grammarly interview process take?

Most candidates spend between 4 and 8 weeks from recruiter screen to offer. The onsite loop itself runs in a single day or is split across two half-days, with debrief and offer typically within 5 business days after.

How should I prepare specifically for Grammarly?

Focus on three things: (1) the company DNA shown above — what they actually grade for, (2) the rounds in your loop, especially the round most candidates underestimate, and (3) drilling on the question types in this guide using a structured framework like CIRCLES or STAR.

Does this apply to engineering or design roles at Grammarly?

The DNA stays the same — what changes is the round mix. SWE candidates face coding screens instead of Product Sense; designers face portfolio reviews and design exercises. The "what they value" and behavioral signals carry across all functions.

What interests you about working at Grammarly, and how do you see your skills contributing to our mission of improving communication?

Type: Motivation. Sign up at JobMentis to see the full framework, grading signals, and worked answer for this question.

Implement a data structure that can efficiently store and retrieve all unique suggestions Grammarly has made for a given user across all their documents. The structure should support adding a new suggestion and querying for all suggestions made for a specific user.

Type: Data Structures. Sign up at JobMentis to see the full framework, grading signals, and worked answer for this question.

Design the backend system for a new Grammarly feature that suggests alternative phrasing for sentences. Consider how users will submit text, how suggestions will be generated (assume a model exists), and how results will be returned efficiently, especially for long documents.

Type: API Design. Sign up at JobMentis to see the full framework, grading signals, and worked answer for this question.

Design the database schema to store user feedback on Grammarly suggestions (e.g., 'helpful', 'not helpful', 'incorrect'). The system needs to support querying feedback for specific suggestion types, specific users, and overall trends.

Type: Database Design. Sign up at JobMentis to see the full framework, grading signals, and worked answer for this question.

A user reports that Grammarly occasionally misses obvious spelling errors in their emails. Here's a simplified version of the code that handles spell checking. Find and fix the bug.

Type: Debugging. Sign up at JobMentis to see the full framework, grading signals, and worked answer for this question.

Given a large corpus of text and a user's writing, find the top K most similar sentences in the corpus to the user's sentences, based on a semantic similarity metric (you can define a simplified metric).

Type: Algorithmic (Hard). Sign up at JobMentis to see the full framework, grading signals, and worked answer for this question.

Tell me about a time you had to influence a cross-functional team (engineers, designers, marketers) to adopt your product vision or strategy when there was initial resistance. What was the situation, what did you do, and what was the outcome?

Type: Past Experience. Sign up at JobMentis to see the full framework, grading signals, and worked answer for this question.

Other roles at Grammarly:Product Manager Software Engineer Sales Marketing

Growth · Software Engineer Interview Guide

How to Pass the Grammarly Software Engineer Interview in 2026

The Grammarly DNA (TL;DR)

Grammarly highly values user empathy, clear communication, and a data-driven approach to product development. They seek candidates who can articulate complex ideas simply, understand user needs in improving writing, and contribute to a culture of continuous improvement through feedback.

The Grammarly Interview Loop

Your onsite loop will typically consist of 5 rounds.

1
Round 1
Recruiter Screen
Motivation, role fit, logistics.
2
Round 2
Coding Screen
LeetCode-medium algorithmic problems under time pressure.
3
Round 3
System Design
Distributed systems, trade-offs at scale, architecture under constraints.
4
Round 4
Onsite Coding
LeetCode-hard, debugging, code clarity, edge cases.
5
Round 5
Behavioral / Leadership
Past evidence of ownership, influence, resolving conflict.

The Danger Zone: Top Reasons Candidates Fail

Based on our database of Grammarly interview outcomes, avoid these common traps:

Not defining clear criteria for what constitutes a 'detectable' error within the stream.
Implementing a overly simplistic heuristic that doesn't capture nuances of writing quality.
Ignoring potential bottlenecks in suggestion generation or retrieval.
Introducing new bugs while attempting to fix the original one.

Test Yourself: Real Grammarly Questions

Three real prompts pulled from our database.

Type · Problem Solving

Describe a situation where you faced a significant, unexpected obstacle in a project you were managing. How did you approach the problem, what steps did you take to overcome it, and what did you learn from the experience?

Type · String Manipulation

Write a function that takes a piece of text and returns a 'confidence score' between 0 and 1, indicating how likely the text is to contain a writing error. This score should be based on heuristics like sentence length, complexity, and presence of certain keywords (you can define these heuristics).

Type · Algorithmic

Given a stream of sentences, design an algorithm to detect if any sentence contains a grammatical error that Grammarly's core product would flag. You can assume access to a hypothetical API that returns true if a sentence has a specific type of error.

+ many more questions, signals, and worked examples

Unlock the rubric →

Grammarly Interview Question Bank

A sample from our database, grouped by round. Sign up to see the full set.

9 of 18 questions shown

Recruiter Screen

1
Type · Motivation
What interests you about working at Grammarly, and how do you see your skills contributing to our mission of improving communication?

Coding Screen

2
Type · Algorithmic
Given a stream of sentences, design an algorithm to detect if any sentence contains a grammatical error that Grammarly's core product would flag. You can assume access to a hypothetical API that returns true if a sentence has a specific type of error.
3
Type · Data Structures
Implement a data structure that can efficiently store and retrieve all unique suggestions Grammarly has made for a given user across all their documents. The structure should support adding a new suggestion and querying for all suggestions made for a specific user.
+ 1 more questions in this round (sign up to unlock)

System Design

4
Type · API Design
Design the backend system for a new Grammarly feature that suggests alternative phrasing for sentences. Consider how users will submit text, how suggestions will be generated (assume a model exists), and how results will be returned efficiently, especially for long documents.
5
Type · Database Design
Design the database schema to store user feedback on Grammarly suggestions (e.g., 'helpful', 'not helpful', 'incorrect'). The system needs to support querying feedback for specific suggestion types, specific users, and overall trends.
+ 1 more questions in this round (sign up to unlock)

Onsite Coding

6
Type · Debugging
A user reports that Grammarly occasionally misses obvious spelling errors in their emails. Here's a simplified version of the code that handles spell checking. Find and fix the bug.
7
Type · Algorithmic (Hard)
Given a large corpus of text and a user's writing, find the top K most similar sentences in the corpus to the user's sentences, based on a semantic similarity metric (you can define a simplified metric).
+ 1 more questions in this round (sign up to unlock)

Behavioral / Leadership

8
Type · Past Experience
Tell me about a time you had to influence a cross-functional team (engineers, designers, marketers) to adopt your product vision or strategy when there was initial resistance. What was the situation, what did you do, and what was the outcome?
9
Type · Problem Solving
Describe a situation where you faced a significant, unexpected obstacle in a project you were managing. How did you approach the problem, what steps did you take to overcome it, and what did you learn from the experience?
+ 6 more questions in this round (sign up to unlock)

Unlock the full Grammarly question bank

Free signup, no credit card. You get every question + the framework, grading signals, and worked answer for each.

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Interview tracks at Grammarly

How Grammarly's DNA translates across functions. Pick your role.

SWEs are assessed on their proficiency in algorithms, scalable system design for NLP/ML, and practical application to deliver real-time writing feedback. They look for experience with large text datasets, model integration, and building robust, performant services for millions of users.

Problem Solving

String Manipulation

+ 1 more

Unlock the Software Engineer grading rubric for Grammarly

See full Software Engineer guide