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Slack Interview Questions Slack Interview Reports Engineering at Slack Career Levels and Compensation

Someone at Slack says...

Strong executive leadership pointing the company in the right direction. Best culture I've experienced so far -- the people I work with are driven yet compassionate. We are expected to work hard and smart for 8 hours a day, then go home. Building a product that I use on a daily basis is exciting. Frequent reorganizations and process changes, not surprising for a fast-growing company but could be annoying. On certain teams, there's a lot of tribal knowledge that makes it difficult for a newcomer to start contributing right away. People can be too nice to the point where difficult topics are avoided.

Slack Interview Questions

Note: ensure you read the disclaimer on the previous page reading the accuracy and sourcing of these problems.

Binary Tree Inorder Traversal

Can you write a function to traverse a binary tree **in order**, and print out the value of each node as it passes? 4 5 6 The example would output 4, 6, 5 since there is no left child for 4 , and 6 is visited in order before 5 . The definition of a tree node i...

Difficulty: 3/10

Two Stack Queue

Building a Queue with Two Stacks: A Challenge in Engineering Elegance The Objective: Queue with Stacks In this challenge, your task is to implement a queue using two stacks. While many programming languages offer queues through arrays or lists, we're restricting our approach to only utilize ...

Difficulty: 6/10

Convert Number to Words

Can you convert a number to its text equivalent? This is otherwise known as number spelling . For example, given 1234 , we expect to get "one thousand two hundred and thirty four" back. Constraints The given number will have 100 digits Let n be the number of digits E...

Difficulty: 8/10

Max Per Level

Given a binary tree, write a method to return an array containing the largest by value node values at each level. In other words, we're looking for the max per level . So for instance, given the following binary tree, we'd get 2, 7, 9 if the method grabbed the correct maxes. js ...

Difficulty: 4/10

Find the Intersection of Two Linked Lists

Assume you have a Linked List implementation that has the following API: js prepend to start of list prepend val appends to end of list append val get an array of node values for testing toArray Can you write a method getIntersection list1, list2 to find the interse...

Difficulty: 4/10

Max of Min Pairs

We have an array of length 2 * n even length that consists of random integers. 1, 3, 2, 6, 5, 4 We are asked to create pairs out of these integers, like such: 1, 3 , 2, 6 , 5, 4 How can we divide up the pairs such that the sum of smaller integers in each pair is maximized? ...

Difficulty: 4/10

Is Software Engineering a Winner Takes All or Auction Profession?

Cal Newport has studied the science of high mental performance for years. He's written multiples books about getting better results in school and work, and has recently shifted his attention towards the problems of the modern day technology worker. Newport himself is an Associate Professor of Co...

Difficulty: 5/10

Monitoring and Logging

Introduction to Monitoring and Logging Microservices are an architectural style that structures an application as a collection of loosely coupled services, each independently deployable and scalable. Monitoring and logging play a critical role in microservices architectures as they enable the o...

Difficulty: 5/10

Introduction to Data Structures

Still generating... This lesson is currently still being generated, please wait... thanks! **Please refresh in a minute or two to see updates.** ...

Difficulty: 5/10

Object-Oriented Programming in C#

Introduction to Object Oriented Programming Welcome to the world of Object Oriented Programming OOP ! In this lesson, we will provide an overview of OOP concepts and explain why they are important in C . What is Object Oriented Programming? Object Oriented Programming is a programming pa...

Difficulty: 5/10

Introduction to C++

C is an imperative, language with a strong emphasis on **performance and efficiency** qualities that certainly resonate with engineers. It is widely known for being a middle level language, as it encapsulates *both high level and low level language features*. Its background dates back to 1979 w...

Difficulty: 5/10

OOP Basics: Classes and Objects

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Difficulty: 5/10

Interview Reports

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How I Landed My Dream Job At Slack...

Product Manager

A firsthand look at what it takes to be hired by the wildly popular team collaboration platform.

People at Slack Say

This information was sourced from reviews originally posted on Glassdoor.

Wonderful culture: humility, empathy and just plain good natured personalities abound. Having worked at many large, high profile internet companies the hardest thing to get used to is: yes, these people are also very very smart and talented.

Work with some of the brightest and diverse people in tech. A lot of the engineers at Slack were previously at Facebook, Google, etc. and helped build out those companies. Awesome perks, good, food, great snacks, amazing founders very transparent work place. The people at Slack are very emphatic and help you when you need it. Oh yeah, free weekly massages are pretty awesome. Tough deadlines can be stressful at times. Slack doesn't have catered food all days of the week. Some teams definitely have more work to do than others. If you're an engineer on one of these teams life can be a little stressful.

Lots of openness & communication from the executive,Good focus on work/life balance. Everyone leaves at a reasonable hour and you aren't expected to work outside of work hours. Everyone takes vacation. We get ownership of our projects and get a say in what we work on. Pay is decent but not the best you can get in the industry.

Growing pains, sometimes things are changing so fast that is hard to catch up with everything going on. Keep focus on fostering the culture that has helped succeed. Working on the same product you use on a daily basis is extremely motivating and fun. Lots of technical and professional challenges. Great opportunity to grow in your career. Great salaries and benefits.