Core Courses and Role-Specific Add-ons
Every loop tests coding, system design and behavioral skills, so those are our three core courses. Add frontend, AI/ML, DevOps, mobile or Web3 prep on top for role-specific rounds.
Core courses (3)
The rounds almost every software engineering loop includes. Start here.
- Foundations refresher: memory, Big O and the core data structures
- 15 problem-solving patterns, each with a concept video and graded problems
- 170+ lessons across arrays, trees, graphs, dynamic programming and more
- Time and space complexity breakdown for every solution
- Interview framework, scoping and back-of-the-envelope estimation
- Building blocks: load balancing, caching, databases, queues and CDNs
- Distributed systems: replication, sharding, consistency and consensus
- 13 end-to-end case studies with recorded mock interviews
- How behavioral rounds are run and scored
- STAR and CARL storytelling, with a guided story-bank builder
- Question themes: ownership, conflict, failure, ambiguity and influence
- Level calibration with example answers at mid, senior and staff
Add-on courses (6)
Role-specific prep to take alongside the core courses.
JavaScript, React, browser internals and frontend architecture interviews
17 questions · 21+ hours
ML fundamentals, ML coding and large-scale ML system design
8 questions · 15+ hours
Linux, CI/CD, infrastructure as code and cloud platform interviews
11 questions · 13+ hours
Swift, SwiftUI, UIKit and mobile architecture interviews
8 questions · 12+ hours
Kotlin, Jetpack Compose, coroutines and Android architecture interviews
5 questions · 11+ hours
Smart contracts, Solidity, the EVM and cryptographic protocols
8 questions · 11+ hours
Explore the PrepNode Content Vault
Dive into our preview catalog of algorithmic coding challenges, distributed systems architecture blueprints, video tutorials, and timed mock assessments.