Security Vulnerability Patching
Identify and fix critical security flaws. Tests OWASP Top 10 knowledge, sanitization, and preventing malicious injections.
BeginnerIntermediateAdvanced
Open topic
System Architecture Design
Design robust backends from the ground up. Tests component diagramming, scalability thinking, and trade-off analysis.
BeginnerIntermediateAdvanced
Open topic
Testing Strategies
Write robust automated tests. Tests unit testing pure functions, mocking databases for integration tests, and orchestrating E2E test flows.
BeginnerIntermediateAdvanced
Open topic