Interview Pen is an online learning platform that prepares software engineers for technical interviews through structured courses in data structures & algorithms and system design. It offers 154+ video explanations, a full coding environment, and a context-aware AI teaching assistant. The platform provides lifetime access to its content library, which is continuously expanded with new problems and walkthroughs.
Funding
Funding not disclosed
Founders
Product
Problem
Software engineering candidates often struggle to prepare for technical interviews due to fragmented resources, a lack of structured curricula, and insufficient practice with real-world problem-solving. Many existing prep materials fail to explain the reasoning behind solutions or provide interactive coding environments, leaving candidates underprepared for the depth and breadth of questions they face.
Solution
Interview Pen offers a comprehensive, structured interview preparation platform focused on data structures & algorithms and system design. The platform combines a curated library of 154+ video explanations with a full coding environment that supports multiple programming languages, allowing users to practice implementing solutions hands-on. A context-aware AI teaching assistant provides on-demand, personalized help by understanding the user's code, the problem statement, and any errors, simulating a 1-on-1 tutoring experience. The curriculum is designed to teach the most important concepts in the fewest questions, with solutions that progress from brute force to optimal approaches. The content library is continuously updated with new problems and videos, ensuring the material stays current and comprehensive.
Target Audience
Primary users are software engineering candidates preparing for technical interviews at top technology companies, including students seeking internships and professionals pursuing full-time roles.
Features
- 154+ video explanations covering 15 essential categories, including dynamic programming, graphs, and system design walkthroughs
- Full coding environment supporting 8 programming languages for hands-on practice
- Context-aware AI teaching assistant that understands the problem, user's code, and errors for personalized guidance
- Solutions for all problems, starting from brute force and incrementally reaching optimal solutions with time and space complexity annotations
- Live library with 1-2 new problems or videos added weekly, each taking 4-8 hours to produce
- 1-on-1 problem support via Discord community for peer and instructor assistance
- System Design course featuring walkthroughs on 40+ problems, covering fundamentals and their applications