Object Oriented Design courses can help you learn principles like encapsulation, inheritance, and polymorphism, along with design patterns such as Singleton and Factory. You can build skills in creating reusable code, improving software maintainability, and designing systems that are easier to understand and extend. Many courses introduce tools like UML for modeling, as well as programming languages such as Java and Python, which are commonly used to implement object-oriented concepts in real-world applications.

LearnQuest
Skills you'll gain: JUnit, Test Driven Development (TDD), Unit Testing, Software Testing, Test Case, Eclipse (Software), Test Data, Development Testing, Test Automation, Test Execution Engine, Integrated Development Environments, Test Script Development, Java, Test Tools, Maintainability, Software Design
★ 3.8 (73) · Intermediate · Specialization · 1 - 3 Months

Universidad de los Andes
Skills you'll gain: Control Systems, Mathematical Modeling, Engineering Analysis, Matlab, Simulation and Simulation Software, Systems Analysis, Systems Design, Differential Equations, Applied Mathematics, Linear Algebra, Performance Tuning
★ 4.7 (70) · Intermediate · Course · 1 - 4 Weeks
Skills you'll gain: Mediation, Conflict Management, Emotional Intelligence, Team Performance Management, Collaboration, Team Collaboration, Empathy & Emotional Intelligence, Trustworthiness, De-escalation Techniques, Root Cause Analysis, Empathy, Discussion Facilitation, Communication, Communication Strategies, Employee Engagement
★ 4.5 (22) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Databricks, Model Deployment, Responsible AI, Model Training, Microsoft Azure, Data Science, Applied Machine Learning, Data Integration, MLOps (Machine Learning Operations), Predictive Modeling, Model Evaluation, Machine Learning Methods, Machine Learning, Data Preprocessing
★ 4.4 (80) · Intermediate · Course · 1 - 3 Months

Microsoft
Skills you'll gain: Responsive Web Design, Cascading Style Sheets (CSS), Data Persistence, Event-Driven Programming, HTML and CSS, Web Applications, Front-End Web Development, Semantic Web, Javascript, Browser Compatibility, Secure Coding, Web Content Accessibility Guidelines, Data Storage Technologies, Application Security, Data Validation, Data Management
★ 3.8 (8) · Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Data Modeling, Oracle SQL Developer, Relational Databases, Database Design, Databases, SQL, Oracle Databases, Query Languages, Software Installation
★ 4.5 (31) · Intermediate · Course · 1 - 4 Weeks

Howard University
Skills you'll gain: Business Software, Information Systems, Enterprise Application Management, Management Information Systems, Information Technology, Enterprise Resource Planning, Information Systems Security, E-Commerce, Business Systems Analysis, Systems Analysis, Computer Hardware, Data Warehousing, Decision Support Systems, Disaster Recovery, Networking Hardware, Business Ethics, Operating Systems, Data Ethics, Business Process Management, Customer Relationship Management
★ 4.7 (72) · Intermediate · Course · 1 - 4 Weeks

SkillsBooster Academy
Skills you'll gain: Prompt Engineering, Vibe coding, AI Workflows, Generative AI Agents, Software Development Tools, Application Development, GitHub, Code Review, AI Personalization, Software Development, Generative AI, Artificial Intelligence, Web Development Tools, Web Development, Software Engineering, Responsible AI, Design Software, Front-End Web Development, Javascript, React.js
★ 4.4 (50) · Beginner · Course · 1 - 3 Months

Politecnico di Milano
Skills you'll gain: Responsible AI, Data Ethics, Artificial Intelligence, Healthcare Industry Knowledge, Health Systems, Health Care Procedure and Regulation, Ethical Standards And Conduct, AI Integrations, Healthcare Ethics, AI Workflows, Machine Learning, Health Informatics, Verification And Validation, Health Technology, Model Evaluation, Data Governance
★ 4.6 (68) · Beginner · Course · 1 - 3 Months

University of California, Irvine
Skills you'll gain: Virtual Teams, Conflict Management, Telecommuting, Trustworthiness, Interpersonal Communications, Team Leadership, Collaboration, Collaborative Software, Leadership, Team Collaboration, Team Building, Drive Engagement, Rapport Building, Productivity, Team Management, Leadership Development, Relationship Building, People Management, Meeting Facilitation, Constructive Feedback
★ 4.7 (46) · Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Writing, Storytelling, Personal Development, Self-Awareness, Creativity, Emotional Intelligence, Peer Review
★ 4.1 (14) · Beginner · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Usability Testing, Usability, Human Centered Design, Software Testing, Surveys, User Experience Design, Software Quality (SQA/SQC), Survey Creation, Test Planning, Technical Communication, UI/UX Research, Quality Assurance, User Research, Verification And Validation, User Centered Design, Web Content Accessibility Guidelines, Report Writing, User Experience, Risk Management Framework, Stakeholder Engagement
★ 3.1 (10) · Advanced · Specialization · 1 - 3 Months