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Voice or text — AI interviews you in real time. Instant scoring, detailed feedback, 10 languages.
83+ developers learning on LevelJo
83+
Developers
16+
Courses
4395
Max XP
10
Languages
NO SIGN-UP REQUIRED
Explore our tools without creating an account. See what LevelJo can do for you.
HOW IT WORKS
Write real code with interactive courses powered by the Monaco editor. Progress step by step with instant feedback.
Every completed step earns XP. Climb the global leaderboard and prove your skills with real data.
WHY LEVELJO?
Write real code in the same editor as VS Code. Syntax highlighting, autocomplete and instant error checking.
Practice realistic interviews with AI across 50+ professions. Voice chat, coding challenges, and detailed scoring — all in one place.
50+
Interview Topics
10
Languages
FEATURED COURSES
Learn effective social media strategies for your business. From audience analysis to content planning, paid advertising, and performance measurement.
Learn to design scalable systems. Master load balancing, caching, database sharding, microservices, and real-world case studies.
From data preprocessing to deep learning. Learn scikit-learn, TensorFlow, model evaluation, and real-world ML projects.
Build cross-platform mobile apps with React Native. Learn navigation, native APIs, state management, and app store deployment.
Build complete web applications from frontend to backend. Learn Node.js, Express, databases, authentication, and deployment.
Master Python from basics to advanced topics. Learn data structures, OOP, file handling, and popular libraries.
Deep dive into JavaScript: closures, prototypes, async/await, generators, proxies, and modern ES2024+ features.
Learn TypeScript from type basics to advanced generics, utility types, and real-world patterns used in production codebases.
Master SQL from SELECT to advanced joins, indexing, transactions, and database design patterns.
Master Git from init to advanced workflows. Learn branching, merging, rebasing, and team collaboration with GitHub.
Build scalable backend services with Node.js. Learn Express, REST APIs, authentication, databases, and deployment.
Master Next.js App Router, Server Components, API routes, authentication, and deployment on Vercel.
Learn Docker from scratch. Build, ship, and run containers. Master Docker Compose, networking, and production workflows.
Learn cybersecurity essentials: OWASP Top 10, encryption, network security, authentication, and ethical hacking basics.
Learn data analysis using Python and Pandas. A practical journey through data cleaning, visualization, and basic statistics.
Learn the most popular frontend library from scratch. Master component architecture, props, state, hooks, and event handling step by step.
Learn effective social media strategies for your business. From audience analysis to content planning, paid advertising, and performance measurement.
Learn to design scalable systems. Master load balancing, caching, database sharding, microservices, and real-world case studies.
From data preprocessing to deep learning. Learn scikit-learn, TensorFlow, model evaluation, and real-world ML projects.
Build cross-platform mobile apps with React Native. Learn navigation, native APIs, state management, and app store deployment.
Build complete web applications from frontend to backend. Learn Node.js, Express, databases, authentication, and deployment.
Master Python from basics to advanced topics. Learn data structures, OOP, file handling, and popular libraries.
Deep dive into JavaScript: closures, prototypes, async/await, generators, proxies, and modern ES2024+ features.
Learn TypeScript from type basics to advanced generics, utility types, and real-world patterns used in production codebases.
Master SQL from SELECT to advanced joins, indexing, transactions, and database design patterns.
Master Git from init to advanced workflows. Learn branching, merging, rebasing, and team collaboration with GitHub.
Build scalable backend services with Node.js. Learn Express, REST APIs, authentication, databases, and deployment.
Master Next.js App Router, Server Components, API routes, authentication, and deployment on Vercel.
Learn Docker from scratch. Build, ship, and run containers. Master Docker Compose, networking, and production workflows.
Learn cybersecurity essentials: OWASP Top 10, encryption, network security, authentication, and ethical hacking basics.
Learn data analysis using Python and Pandas. A practical journey through data cleaning, visualization, and basic statistics.
Learn the most popular frontend library from scratch. Master component architecture, props, state, hooks, and event handling step by step.
Pricing
Start free, upgrade when you are ready.
Perfect to get started
Create a free account, complete courses, and prove your coding skills.
No credit card required. Your first course is completely free.
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Get StartedTrack your progress on the leaderboard and prove your expertise with XP badges.
Generate a polished, ATS-friendly CV from your profile. Showcase courses, scores, and verified skills.
Alex Johnson
Full Stack Developer
Real-time global ranking. Compete with other candidates and get on companies' radar.
4
Difficulty Levels
Software & Tech
Business
Design
Engineering
Education
Creative & Media
Pick from 50+ career topics across 6 industries
Voice or text — our AI adapts to your answers in real-time
Detailed feedback on knowledge, communication, and problem-solving
Alex
Senior Interviewer
Alex
You
Overall Score
No credit card required — 3 free sessions/month
Your first 7 days are on us
Explore every Pro course, run code and chat with your AI mentor — no strings attached.
Full access to everything.