Coding fluency
Implement an LRU cache. Explain your data structures, test capacity one, and walk through an eviction.
What a strong answer demonstrates
Correctness, edge cases, and time / space complexity.
Prepare for AppDirect with a focused mix of coding, design, and communication. Start with your job description and confirm the interview loop with your recruiter.
6 Practice picks
3 Interview reports
5 Levels mapped
01 / MAKE YOUR NEXT SESSION COUNT
Your preparation, made concrete.
System design
Design a notification service. Clarify delivery guarantees, model the data, then handle retries and duplicate events.
What a strong answer demonstrates
Clear requirements, a working baseline, and explicit trade-offs.
Behavioral storytelling
Describe a technical decision you changed after receiving feedback. Explain your contribution and the outcome.
What a strong answer demonstrates
Specific actions, honest reflection, and measurable impact.
BEFORE YOU PRACTICE
Ask your recruiter.
Get the details that a generic company guide cannot know.
- Which team and level is this opening for, and what does success look like?
- What rounds, durations, and evaluation criteria should I prepare for?
- Which languages, tools, and AI assistance are permitted?
- Will design focus on frontend, backend, infrastructure, or another specialty?
- Are there accommodations or preparation materials I should request?
AppDirect practice problems
Company-linked challenges and related lessons from our library. Not a prediction of your interview.
Challenge
Difficulty 4/10
Validate a BST
Challenge
Difficulty 4/10
Grab a Random Node
Challenge
Difficulty 4/10
Contiguous Subarray Sum
Challenge
Difficulty 6/10
Implement a Binary Search Tree
Challenge
Difficulty 4/10
Max Per Level
Challenge
Difficulty 5/10
K Largest Elements From List
Real interview experiences
3 reports from candidates who interviewed at AppDirect.
What people at AppDirect say
Reviews originally posted on Glassdoor.
Engineers here are some of the brightest and friendliest I've worked with. Company is growing fast so lots of room for growth. The office is at a great location and has a terrific view of the city.
Lots of changes/hiring although in engineering most new hires were for the Montreal office.
Working with top technology stack and you get to actually code and make meaningful contributions.
The company offers stock options and bonuses are often funded. Good benefits and paid time off that increases with tenure.
Calgary office is very laid back and people are nice. Many of the developers are kinda quiet, so if you like a laid back quiet environment this is good. Immediate calgary management is great.
Inside the workplace
About AppDirect
A day at AppDirect