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

Someone at Instacart says...

Instacart is a fast-moving company pursuing a long-neglected industry (grocery shopping). The team is incredibly inclusive and everyone's opinions are not just respected, but actively sought after. There are a number of big things in the works which I am looking forward to watching and being a part of in the next 1-3 years. Instacart is pursuing a very complex set of problems and is currently understaffed to meet its goals effectively. This problem is not unknown to the executive team and our hiring goals have been set with this consideration in mind. Even so, the hiring team itself is understaffed. I foresee this being one of the biggest limiting factors of growth for some time to come.

Instacart Interview Questions

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

Sum of Perfect Squares

A perfect square is a number made by squaring a whole number. Some examples include 1 , 4 , 9 , or 16 , and so on because they are the squared results of 1 , 2 , 3 , 4 , etc. For example: 1 2 1 2 2 4 3 2 9 4 2 16 ... However, 15 is not a perfect square, bec...

Difficulty: 7/10

Find First Non-Repeating Character

You're given a string of random alphanumerical characters with a length between 0 and 1000 . Write a method to return the first character in the string that does not repeat itself later on. So if we had a string input of "asdfsdafdasfjdfsafnnunl'" , we can see there are multiple letters that...

Difficulty: 4/10

Flood Fill Paintbucket

Imagine the implementation for the paintbucket feature in Microsoft Paint, or how certain image filters work. You click on a specific pixel on a screen, and every similar colored neighboring pixel would change to your selected color. Let's implement a simpler version of that feature. You're gi...

Difficulty: 7/10

Implement a Binary Search Tree

Let's implement a Binary Search Tree ! Recall that a binary search tree , or a BST , is a binary tree lessons an intro to binary trees and search trees that is ordered via these two properties: 1. The left sub tree of a node has a value less than or equal to its parent node's value. 2. The ...

Difficulty: 6/10

Implement a Hash Map

Arrays are amazing for looking up elements at specific indices as all elements in memory are contiguous, allowing for O 1 or constant time lookups. But often we don't, or can't, perform lookups via indices. Hash maps and hash tables are a way around this, enabling us to lookup via keys instead. ...

Difficulty: 3/10

Is An Anagram

Understanding Anagrams: A Simple Definition An anagram is a fascinating literary device where you can rearrange the letters of a word, phrase, or name to form another meaningful sequence. Think of it as a jigsaw puzzle made of letters. For example, the word "cinema" can be rearranged to form "ice...

Difficulty: 3/10

Sudoku Solver

Introduction to Sudoku Sudoku is a popular puzzle game that originated in Japan. It consists of a 9x9 grid divided into nine 3x3 sub grids. The goal of Sudoku is to fill in the empty cells of the grid with numbers from 1 to 9, ensuring that each row, each column, and each sub grid contains all ...

Difficulty: 5/10

Data Visualization

Introduction In this lesson, we will introduce two new giant libraries: matplotlib and plotly . There are tons of visualization libraries in python, but matplotlib is the lowest level and most of the other libraries e.g. seaborn , ggplot , bokeh , etc. are built only on matplotlib. ...

Difficulty: 5/10

Debugging WebAssembly

Welcome to the exciting world of WebAssembly debugging! Debugging WebAssembly or wasm modules can feel like a daunting task especially given wasm's low level nature. However, thanks to various advancements in tools and technologies, things are not as intimidating as they might first appear. We...

Difficulty: 5/10

Using the Two Pointer Technique

The Two Pointer Technique The **two pointer technique** is a near necessity in any software developer's toolkit, especially when it comes to technical interviews. In this guide, we'll cover the basics so that you know when and how to use this technique. 0 csharp if len 2 return...

Difficulty: 5/10

Hashmaps: Efficient Data Retrieval

**Unlock Your Full Potential with AlgoDaily!** We hope you're enjoying this course. At AlgoDaily, our aim is to transform complex coding challenges into engaging, bite sized lessons. And while our free lessons give you a glimpse of this transformative experience, there's so much more in store. ...

Difficulty: 5/10

Introduction to Neural Networks

Introduction In this lesson, we will introduce the hot cake of the field of Machine Learning. Neural Networks are models designed based on our brains. Human brains have about 86 billion cells connected together by synapses. A neural network also has many cells units that are connected to one ...

Difficulty: 5/10

People at Instacart Say

This information was sourced from reviews originally posted on Glassdoor.

Really excellent company to work for. Good work culture. Keep aiming high, keep dreaming and keep hiring. Lack of mentorship. Now only recently put an emphasis on the on boarding experience. High level of autonomy and ownership. An environment where you can make things happen if you chase them.

Blend of scale but nimble-ness, flexibility to do and learn what you want, genuinely nice people, cush office amenities. . don't need to worry about food. . IC's got all your eating needs covered, people that invest in others. Gotta learn that RoR, some people get us confused with IG, a great service that gets ratched press. Just gotta keep pushing the name and get out in the community so folks know what a special placed this is to build a career at.

The sky is the limit. There are so many cool things we can do, hard problems to solve, and impact to make. You won't get bored here. Big focus on career development. Lot's of learning, an allowance for books and conferences, growing company with new positions opening up. Creating jobs for shoppers, getting groceries to elderly, disabled, and busy families, helping brick & mortar companies.

We solve really hard problems and utilize everyone's unique skill set. Engineers have a fair amount of flexibility on which projects they work on and the role they play -- your business and product ideas are valued. Our work is meaningful -- we help millions of elderly, disabled, busy families, and others with groceries while employing tens of thousands of people. The company is headed to a great place and it's awesome helping us to get there. We should be much more proactive with the press. Our successes aren't well enough known and we're letting the media get away with a pessimistic spin that can hurt our ability to hire great employees, attract customers, and even raise funding. Just because we know it's BS isn't enough.