DEVijx
Test your developer knowledge
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
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
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Maksim Efremov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Maksim Efremov
- Size
- 894 KB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Russian
- Age Rating
4+
- 4+
- Copyright
- © 2026 Maksim Efremov