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.

Johns Hopkins University
Skills you'll gain: Amazon Web Services, Tensorflow, Applied Machine Learning, Machine Learning Methods, Natural Language Processing, Classification Algorithms, Software Design, Application Development, Supervised Learning, Model Evaluation
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Authentications, OAuth, API Testing, Restful API, Application Programming Interface (API), JSON, Test Automation, Data Validation, Extensible Markup Language (XML), Mockups, Test Tools, Simple Object Access Protocol (SOAP), Virtualization, Debugging
Intermediate · Course · 1 - 3 Months

Birla Institute of Technology & Science, Pilani
Skills you'll gain: Human Computer Interaction, Web Content Accessibility Guidelines, Human Factors, Usability, Interaction Design, Prototyping, User Interface and User Experience (UI/UX) Design, User Experience Design, User Centered Design, User Interface (UI) Design, Responsive Web Design, Design Thinking, Usability Testing, Augmented and Virtual Reality (AR/VR), User Research, Wireframing, Information Architecture
Intermediate · Course · 1 - 3 Months

Coursera
Skills you'll gain: Collaboration, Time Management, Productivity, Organizational Skills, User Accounts
Beginner · Guided Project · Less Than 2 Hours

Scrimba
Skills you'll gain: Cascading Style Sheets (CSS), Browser Compatibility, Animations, HTML and CSS, Frontend Performance, Responsive Web Design, Web Design, Web Development
Intermediate · Course · 1 - 4 Weeks

Google Cloud
Skills you'll gain: Kubernetes, Application Performance Management, YAML, Google Cloud Platform, Configuration Management, Real Time Data, Data Analysis
Beginner · Project · Less Than 2 Hours

Eindhoven University of Technology
Skills you'll gain: Laboratory Equipment, Systems Of Measurement, Building Design, Laboratory Procedures, Architectural Design, Architectural Engineering, Simulations, Human Factors, Visualization (Computer Graphics), Physics, Psychology, Physiology
Mixed · Course · 1 - 3 Months

Skills you'll gain: Canva (Software), Animations, Content Creation, Graphic and Visual Design, Graphic Design
Beginner · Guided Project · Less Than 2 Hours

AI CERTs
Skills you'll gain: Agentic systems, Generative AI Agents, AI Workflows, Artificial Intelligence and Machine Learning (AI/ML), Emerging Technologies, Business Ethics, Deep Learning, Social Impact, Ethical Standards And Conduct, Problem Solving, Analysis, Business Planning
Beginner · Course · 1 - 3 Months

Skills you'll gain: C# (Programming Language), Object Oriented Programming (OOP), Web Scraping, Programming Principles, Microsoft Visual Studio, .NET Framework, Data Structures, Software Design Patterns, File I/O, Application Development, Computational Logic, Algorithms, Hypertext Markup Language (HTML), Unit Testing, Debugging
Beginner · Course · 1 - 3 Months

Banco Interamericano de Desarrollo
Skills you'll gain: Sustainable Development, Sustainable Design, Economic Development, Sustainability Standards, Project Finance, Environmental Social And Corporate Governance (ESG), Project Management, Environment, Climate Change Mitigation, Environmental Regulations, Private Equity
Beginner · Course · 1 - 4 Weeks

University of California, Irvine
Skills you'll gain: Peer Review, Organizational Strategy, Brand Management, Business Planning, Organizational Structure, Recruitment, Fundraising, Brand Strategy, Project Design, Analysis
Beginner · Course · 1 - 4 Weeks