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開発者
16+
Courses
4395
Max XP
10
Languages
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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.
50以上の職種でAIとリアルな面接練習。音声チャット、コーディング課題、詳細なスコアリング — すべてが一か所に。
50+
面接トピック
10
言語
4
難易度レベル
FEATURED COURSES
ビジネスのための効果的なソーシャルメディア戦略を学びます。オーディエンス分析からコンテンツ計画、有料広告、パフォーマンス測定まで。
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.
ビジネスのための効果的なソーシャルメディア戦略を学びます。オーディエンス分析からコンテンツ計画、有料広告、パフォーマンス測定まで。
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.
料金プラン
無料で始めて、準備ができたらアップグレード。
無料アカウントを作成し、コースを修了して、プログラミングスキルを証明しましょう。
クレジットカード不要。最初のコースは完全無料です。
無料アカウントを作成して学習を始めよう
始めるランキングで進捗を追跡し、XPバッジで専門知識を証明しましょう。
プロフィールからATS対応のプロフェッショナルなCVを作成。コース、スコア、検証済みスキルを表示。
田中太郎
フルスタックデベロッパー
Real-time global ranking. Compete with other candidates and get on companies' radar.
ソフトウェア & テック
ビジネス
デザイン
エンジニアリング
教育
クリエイティブ & メディア
6業界の50+キャリアトピックから選択
音声またはテキスト — AIがリアルタイムで適応
知識、コミュニケーション、問題解決の詳細フィードバック
Alex
Senior Interviewer
Alex
あなた
総合スコア
すべてにフルアクセス。