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Codethos.dev
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Codethos is a gamified learning platform for developers who want to build real programming and application security skills through hands-on challenges.
Instead of toy coding exercises, Codethos focuses on production-oriented problems such as parsing, file I/O, APIs, authentication, rate limiting, access control, vulnerabilities, and other real-world engineering scenarios.
The platform combines structured learning paths, automated grading, XP, streaks, leaderboards, achievements, and verifiable certificates.
Codethos currently offers tracks in Programming, Application Security, and Bioinformatics, with exercises designed to help learners understand, build, debug, and secure real software.
It is particularly useful for developers who increasingly rely on AI coding tools and want to develop the skills needed to understand, review, debug, and secure generated code.
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Hack The Box - An online platform to test and advance your skills in penetration testing and cyber security.
LeetCode - Practice and level up your development skills and prepare for technical interviews.
TryHackMe - TryHackMe is an online platform for learning and teaching cyber security, all through your browser.
VulnHub - VulnHub provides materials allowing anyone to gain practical hands-on experience with digital security, computer applications and network administration tasks.
Exercism - Download and solve practice problems in over 30 different languages.
PwnTillDawn Online Battlefield - PwnTillDawn Online Battlefield is an online platform that allows you to learn and improve your pentesting and other cybersecurity assessments skills.