This interview process is designed to assess candidates for the Senior Software Engineer (IC4) role at Reddit. It evaluates technical proficiency, problem-solving skills, system design capabilities, and cultural fit within the company.
Rounds·4
Timeline·~14d
Experience·5 - 10 yrs
Comp band·US$170000 - US$220000
Interview time·180 min
Evaluation
Preparation
Tips
Study plan
Fig · Study plan — 04 phases
01 / 04Phase 01 of 04
Weeks 1-2: DSA fundamentals and practice (Easy/Medium).
Weeks 1-2: Focus on Data Structures and Algorithms. Cover arrays, linked lists, trees, graphs, hash tables, heaps, sorting, searching, dynamic programming, and greedy algorithms. Practice problems on LeetCode (Easy to Medium).
Phase 02 of 04
Weeks 3-4: System Design principles and common patterns.
Weeks 3-4: Deep dive into System Design. Study concepts like scalability, availability, reliability, load balancing, caching, databases (SQL/NoSQL), message queues, and microservices. Review common system design interview questions.
Phase 03 of 04
Week 5: Behavioral questions and STAR method preparation.
Week 5: Behavioral and Experience Review. Prepare to discuss your resume, past projects, leadership experiences, conflict resolution, and teamwork. Use the STAR method (Situation, Task, Action, Result) to structure your answers.
Phase 04 of 04
Week 6: Mock interviews and final review.
Week 6: Mock Interviews and Refinement. Conduct mock interviews for coding, system design, and behavioral questions. Get feedback and refine your answers and approach. Review any weak areas identified.
Questions
Locations
Fig · Regions — 02 locations
01 / 02Location
Interview focus
Common questions
Tips
Location
Interview focus
Common questions
Tips
Rounds
Expand a step for evaluation criteria, sample questions, and prep notes.
Data Structures And Algorithms Interview · 45 min · Software Engineer
This round focuses on your core programming skills. You will be given one or two coding problems, typically involving data structures and algorithms. The interviewer will assess your ability to understand the problem, devise an efficient solution, write clean code, and test it thoroughly. Expect to discuss time and space complexity and potential optimizations.
What they look for
Evaluation
Sample questions
Given a binary tree, find the lowest common ancestor of two given nodes in the tree.
Implement a function to find the k-th largest element in an unsorted array.
Design a data structure that supports insert, delete, search, and getRandom in O(1) time.
Prep for this round
Common rejection reasons
System Design Interview · 60 min · Senior Software Engineer / Engineering Manager
This round evaluates your ability to design complex, scalable, and reliable systems. You'll be presented with a broad problem statement (e.g., design a social media feed, a URL shortener, or a real-time chat system) and expected to design a high-level architecture. This includes defining APIs, data models, database choices, caching strategies, and handling potential bottlenecks.
What they look for
Evaluation
Sample questions
Design a system like Twitter's timeline.
Design a URL shortening service like bit.ly.
Design a system to count unique visitors to a website in real-time.
Prep for this round
Common rejection reasons
Behavioral Interview · 45 min · Hiring Manager / Senior Team Member
This round focuses on your behavioral and cultural fit. You'll be asked questions about your past experiences, how you handle challenges, work with others, and your motivations. The goal is to understand how you operate within a team and if you align with Reddit's core values. Use the STAR method to provide specific, concise examples.
What they look for
Evaluation
Sample questions
Tell me about a time you had to deal with a difficult colleague. How did you handle it?
Describe a project where you took initiative or leadership. What was the outcome?
Why are you interested in working at Reddit?
How do you handle constructive criticism?
Prep for this round
Common rejection reasons
Hiring Manager Interview · 30 min · Hiring Manager
This is typically the final round with the hiring manager. They will discuss the team's specific projects, challenges, and expectations. This is also an opportunity for you to ask in-depth questions about the role, team dynamics, career growth, and the overall direction of the engineering department. The manager makes the final hiring decision based on all feedback.
What they look for
Evaluation
Sample questions
What are your expectations for this role and the team?
What are the biggest technical challenges facing this team right now?
How do you see yourself contributing to the team's success?
Prep for this round
Common rejection reasons
DSA
Frequently reported on Reddit loops
Other guides
