DEVijx

DEVijx is a Duolingo-style trainer for backend developers. Every lesson is built from a real interview question: six or seven tiny questions, one idea each, with a short explanation after every answer. Seven question formats: pick the answer, true or myth, fill the blank, put in order, match the pairs, enter a number, type the term. Topics so far: Go (goroutines, scheduler, errgroup), PostgreSQL (row locks, pagination), Kafka (poison messages, dead letter queue), web (cookies) and architecture (CQRS). New lessons download automatically. • Random mix: seven questions from all lessons in one tap • Explanations for every answer, right or wrong • Streak and XP: finish a lesson a day to keep the streak • English and Russian, switch inside the app • Works offline once lessons are downloaded • No account, no ads, no tracking