English Courses

Structural Design Patterns

Master structural design patterns to organize complex code structures, implement essential patterns like Adapter and Decorator, and create flexible, maintainable software systems.

• CodeSignal
• 4 hours
• Self-Paced
• Free Certificate

Behavioral Design Patterns

Master behavioral design patterns to create flexible object interactions and improve code maintainability through Observer, Strategy, Command, Template, and State patterns implementation.

• CodeSignal
• 4 hours
• Self-Paced
• Free Certificate

Applying Design Patterns in a Smart Home System

Master design patterns through practical Java implementation in smart home systems, from creating centralized hubs to managing device states and real-time notifications.

• CodeSignal
• 1 hour
• Self-Paced
• Free Certificate

Getting Started with SQL

Master fundamental SQL querying skills using real e-commerce data, from basic SELECT statements to complex sorting and filtering, enabling you to extract valuable insights from databases.

• CodeSignal
• 2 hours
• Self-Paced
• Free Certificate

Learning SQL Joins

Master SQL joins through hands-on practice with e-commerce data, connecting tables to analyze customer behavior, product relationships, and order patterns.

• CodeSignal
• 1 hour
• Self-Paced
• Free Certificate

Advanced Query Techniques and Conditional Logic in SQL

Master advanced SQL querying techniques, from logical operations to complex subqueries, enhancing your data analysis capabilities and problem-solving skills with sophisticated database operations.

• CodeSignal
• 1 hour
• Self-Paced
• Free Certificate

Microcredential

Generative AI for Everyone in 2026

242 ratings at CodeSignal

Unlock transformative AI skills for 2026: master communication, content creation, image generation, and emerging voice/video technologies to thrive professionally.

• CodeSignal
• 5 hours
• Self-Paced
• Free Certificate
• 5 courses

Microcredential

Four-Week Coding Interview Prep in Java

236 ratings at CodeSignal

Master coding interview fundamentals through hands-on Java practice, from basic string operations to advanced algorithms like dynamic programming, data structures, and graph theory.

• CodeSignal
• 12 hours
• Self-Paced
• Free Certificate
• 4 courses

Python Classes Basics Revision

Master Python object-oriented programming fundamentals through hands-on practice with classes, constructors, encapsulation, and inheritance while building practical applications.

• CodeSignal
• 3 hours
• Self-Paced
• Free Certificate

Mastering Complex Data Structures in Python

Master advanced Python data structures including tuples, dictionaries, sets, and nested structures. Build practical skills in managing complex data through hands-on implementation of stacks, queues, and compound structures.

• CodeSignal
• 3 hours
• Self-Paced
• Free Certificate

Applying Advanced Data Structures on Practice

Master advanced Python data structures through hands-on practice with real-world applications like inventory systems, library management, and navigation tools. Implement tuples, dictionaries, sets, and nested structures.

• CodeSignal
• 3 hours
• Self-Paced
• Free Certificate

Practicing Intermediate Implementation and Data Streams

Master data stream manipulation and aggregation techniques in Python through hands-on practice with real-world systems like inventory management, user tracking, and transaction processing.

• CodeSignal
• 2 hours
• Self-Paced
• Free Certificate

Microcredential

Fundamental Coding Interview Preparation with C++

222 ratings at CodeSignal

Master C++ programming fundamentals, data structures, and algorithms while developing problem-solving skills needed for technical interviews at leading tech companies through hands-on practice and real-world applications.

• CodeSignal
• 11 hours
• Self-Paced
• Free Certificate
• 5 courses

Microcredential

Coding Interview Prep for Senior Engineers in Python

220 ratings at CodeSignal

Master Python data structures, OOP concepts, and stream manipulation techniques while practicing advanced implementations for handling complex industry data efficiently.

• CodeSignal
• 13 hours
• Self-Paced
• Free Certificate
• 5 courses

Git Basics

Master essential Git concepts and commands, from version control fundamentals to repository management and commit best practices, enabling effective code tracking and collaboration.

• CodeSignal
• 1 hour
• Self-Paced
• Free Certificate