How long does the Warmly 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 Warmly?

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 Warmly?

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.

Other roles at Warmly:Product Manager Software Engineer Sales Customer Success Marketing

Growth · Software Engineer Interview Guide

Interview language: English

How to Pass the Warmly Software Engineer Interview in 2026

The Warmly DNA (TL;DR)

Warmly's 'Warm Experiences' principle guides hiring, seeking individuals who can clearly articulate how their work directly enhances user engagement and conversion, especially concerning features like 'Dynamic Audience Building'. This assesses practical application and impact.

The Warmly 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 Warmly interview outcomes, avoid these common traps:

Describing a situation where they simply got their way without collaboration.
Incorrectly calculating time differences between events.
Focusing on persuasion tactics rather than building consensus or understanding perspectives.
Poorly optimized query performance for complex segmentation requests.

Test Yourself: Real Warmly Questions

Three real prompts pulled from our database.

Type · Algorithmic

Implement a function to calculate the 'engagement score' for an employee based on a weighted average of various activities (e.g., participation in surveys, response times, feedback frequency). The weights can change dynamically. Ensure the implementation is efficient for large numbers of employees and activities.

Type · Architecture

How would you design a feature for Warmly that allows companies to segment their employees based on various criteria (e.g., department, tenure, engagement score) for targeted interventions? Discuss data modeling, query performance, and potential challenges.

Type · Motivation

What interests you about Warmly's mission to improve workplace culture and employee engagement, and how do you see your technical skills contributing to that goal?

+ many more questions, signals, and worked examples

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Warmly Interview Question Bank

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

9 of 19 questions shown

Recruiter Screen

1
Type · Motivation
What interests you about Warmly's mission to improve workplace culture and employee engagement, and how do you see your technical skills contributing to that goal?

Coding Screen

2
Type · Algorithmic
Given a list of employee feedback entries, each with a timestamp and a sentiment score (e.g., positive, negative, neutral), write a function to find the N most frequent sentiment trends over a given time window (e.g., daily, weekly).
3
Type · Algorithmic
Implement a function that takes a list of user engagement events (e.g., 'login', 'post_feedback', 'view_report') and their timestamps, and returns the average time between consecutive events of the same type for each user.
+ 1 more questions in this round (sign up to unlock)

System Design

4
Type · Architecture
Design a system to process and analyze real-time employee sentiment from various sources (e.g., Slack messages, internal surveys, email). How would you handle data ingestion, storage, processing, and visualization?
5
Type · Architecture
Design a notification system for Warmly that alerts managers about significant changes in team sentiment or engagement levels. Consider factors like delivery mechanisms (email, in-app), throttling, and user preferences.
+ 1 more questions in this round (sign up to unlock)

Onsite Coding

6
Type · Debugging
A user reports that their personalized engagement dashboard is showing incorrect data trends. Here's a simplified version of the relevant backend code. Debug and explain the root cause and how you would fix it.
7
Type · Algorithmic
Implement a function to calculate the 'engagement score' for an employee based on a weighted average of various activities (e.g., participation in surveys, response times, feedback frequency). The weights can change dynamically. Ensure the implementation is efficient for large numbers of employees and activities.
+ 2 more questions in this round (sign up to unlock)

Behavioral / Leadership

8
Type · ownership
Tell me about a time you took ownership of a project or initiative that was critical to your team's or company's success, even if it wasn't explicitly part of your job description.
9
Type · influence
Describe a situation where you had to influence a stakeholder (e.g., engineer, designer, executive) who initially disagreed with your proposed product direction.
+ 6 more questions in this round (sign up to unlock)