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.

Michigan State University
Skills you'll gain: Game Design, Design, Virtual Reality, User Experience Design, Design Strategies, Diversity Awareness, Design Research, Augmented and Virtual Reality (AR/VR), Psychology, Virtual Environment, Cultural Sensitivity, Cultural Diversity
★ 3.8 (27) · Beginner · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Financial Modeling, Variance Analysis, Key Performance Indicators (KPIs), Bookkeeping, Financial Forecasting, Revenue Forecasting, Budget Management, Financial Statement Analysis, Business Reporting, Performance Reporting, Financial Auditing, Capital Budgeting, Financial Controls, Financial Reporting, Operating Budget, Financial Analysis, Report Writing, Process Improvement, Banking Services, Financial Data
★ 4.2 (6) · Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Canva (Software), Color Matching, Color Theory, Sales, Design, Sales Strategy, Marketing Materials, Creative Design, Design Elements And Principles, Digital Design, Intellectual Property, Graphic and Visual Design Software, Design Software, Digital Assets, Asset Protection, Marketing
★ 4.7 (9) · Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Power BI, Data Analysis Expressions (DAX), Data Modeling, Star Schema, Database Design, Data Security, Data Visualization Software, Spreadsheet Software, Performance Tuning, Data Access, Performance Improvement, Model Optimization, Data Manipulation
★ 4.9 (9) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Data Wrangling, JSON, Data Structures
★ 4.7 (19) · Intermediate · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Scientific Methods, Science and Research, Critical Thinking, Bayesian Statistics, General Science and Research, Research, Analytical Skills, Research Design, Research Methodologies, Statistical Methods, Probability, Probability & Statistics
★ 4.9 (43) · Beginner · Course · 1 - 3 Months

Scrimba
Skills you'll gain: Javascript, JavaScript Frameworks, Program Development, Web Development, Angular, Vue.JS, Application Development, React.js, Web Applications, Event-Driven Programming, Object Oriented Programming (OOP), Programming Principles, Computer Programming, Data Structures, Software Engineering, Computer Science
★ 4.6 (25) · Intermediate · Course · 1 - 3 Months

Illinois Tech
Skills you'll gain: Database Systems, Relational Databases, Database Software, Databases, Database Management, Database Theory, Database Design, Database Management Systems, SQL, Database Application, Query Languages, Performance Tuning, Data Integrity, Data Manipulation, Authorization (Computing), Data Processing
★ 4.4 (34) · Beginner · Course · 1 - 3 Months

SkillsBooster Academy
Skills you'll gain: Prompt Engineering, Large Language Modeling, Data Ethics, Prompt Patterns, Responsible AI, LLM Application, Context Engineering, AI literacy, AI Workflows, Agentic Workflows, AI Personalization, Generative AI, Artificial Intelligence and Machine Learning (AI/ML), Automation, Collaboration, Information Privacy, Productivity, Innovation, Organizational Skills, Business Technologies
★ 4.8 (17) · Beginner · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Microservices, Frontend Integration, JavaScript Frameworks, Microarchitecture, Front-End Web Development, Event-Driven Programming, Web Design, Secure Coding, Software Design, Scalability, Server Side, Maintainability, Data Sharing
★ 3.9 (18) · Intermediate · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Image Analysis, Model Training, Supervised Learning, Applied Machine Learning, Model Evaluation, Machine Learning Methods, Demand Planning, Artificial Intelligence and Machine Learning (AI/ML), Predictive Modeling, Anomaly Detection, Artificial Intelligence, Convolutional Neural Networks, Model Optimization, Statistical Machine Learning, Supply Chain Management, Machine Learning, Computer Vision, Machine Learning Algorithms, Supply Chain, Natural Language Processing
★ 3.1 (16) · Intermediate · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Data Warehousing, Data Architecture, Data Infrastructure, Data Storage, Database Administration, Extract, Transform, Load, Database Architecture and Administration, Data Integration, Cloud Storage, Data Mart, Data Storage Technologies, Database Design, Operational Data Store, Database Systems, Query Languages, Data Persistence, Metadata Management
★ 3.8 (69) · Beginner · Course · 1 - 4 Weeks