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 Reddit 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
4 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?
Reddit practice problems
Company-linked challenges and related lessons from our library. Not a prediction of your interview.
Challenge
Difficulty 8/10
Serialize and Deserialize a Binary Tree
Challenge
Difficulty 3/10
Validate Palindrome
Challenge
Difficulty 7/10
Hoisting and Call Stack
Challenge
Difficulty 7/10
Levenshtein Edit Distance
Challenge
Difficulty 8/10
The Coin Change Problem
Challenge
Difficulty 6/10
How Deep Does It Go? Maximum Depth of Binary tree
Real interview experiences
4 reports from candidates who interviewed at Reddit.
What people at Reddit say
Reviews originally posted on Glassdoor.
Very good fringe benefits and decent wages Probably will ipo some day for real after a decade of fumbling Interesting challenges, still small enough for individuals to make a difference
You get to have real and meaningful impact on one of the largest platforms in the world. Feels completely unlike other FAANG companies where you’re practically a cog. You can truly make huge change here.
This is a growing company with competitive pay, a good CEO, and lots of challenging scale problems.
If you're of the manipulative management type, it's the sort of environment where you can get by with zero consequences. If you're incompetent it's the ideal place to relax. You should be able to bully others to keep your job, so feel free to join if that's your thing. Those are the nice things I have to say about the company.
Great perks. In addition to insurance + 401k, there's also a lot of budget to spend for wellness, education, dependents, pets, parking, dinners, transit, etc. It's an extensive list.
Inside the workplace
About Reddit
A day at Reddit