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.

University of Colorado System
Skills you'll gain: Video Game Development, Game Design, Unity Engine, Debugging, Program Development, Unreal Engine, Animation and Game Design, No-Code Development, Integrated Development Environments, Graphics Software, Computer Programming, C++ (Programming Language), Event-Driven Programming, Programming Principles, Object Oriented Programming (OOP), Code Reusability, C# (Programming Language), User Interface (UI), Software Installation, Scripting Languages
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Redis, Restful API, ASP.NET, .NET Framework, Application Programming Interface (API), Object-Relational Mapping, API Design, PostgreSQL, Middleware, Maintainability, Software Architecture, Software Design Patterns, Distributed Computing, Data Validation
Intermediate · Course · 1 - 3 Months

Scrimba
Skills you'll gain: Responsive Web Design, UI Components, Cascading Style Sheets (CSS), HTML and CSS, Web Design, Front-End Web Development, User Interface (UI), User Interface (UI) Design, Web Design and Development, Debugging, Web Development
Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Vocabulary, Critical Thinking, Deductive Reasoning, Problem Solving, Grammar, Language Competency, English Language, Literacy, Analytical Skills, Verbal Communication Skills, Analysis, Complex Problem Solving, Communication, Language Learning, Time Management
Beginner · Course · 1 - 3 Months

Skills you'll gain: Security Controls, Scalability, Azure Synapse Analytics, Data Pipelines, Databases, Microsoft Azure, Data Governance, Extract, Transform, Load, Data Lakes, Databricks, NoSQL, Data Processing, Cloud Management, Big Data, Apache Spark, Dashboard Creation, Interactive Data Visualization, Large Language Modeling, Applied Machine Learning, Model Training
Intermediate · Professional Certificate · 3 - 6 Months

EDUCBA
Skills you'll gain: Microsoft Azure, Cloud Computing, Virtual Machines, Cloud Infrastructure, Cloud Computing Architecture, Cloud Platforms, Cloud Services, Virtual Networking, Virtualization and Virtual Machines, Enterprise Application Management, Cloud Applications, Cloud Deployment, Infrastructure As A Service (IaaS), Application Deployment, Network Planning And Design, Virtual Private Networks (VPN), Cloud Management, Virtualization, Cloud Storage, Remote Access Systems
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Test Automation, Object Oriented Programming (OOP), CI/CD, Test Script Development, File I/O, Unit Testing, Devops Tools, Continuous Integration, Jupyter, Data Import/Export, Test Tools, DevOps, IT Automation, Application Programming Interface (API), Program Development, Software Testing, Continuous Deployment, Maintainability, Scripting, Python Programming
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Accounts Payable, Accounts Payable and Receivable, Accounts Receivable, Billing & Invoicing, Invoicing, Accounting Software, Workflow Management, Payment Processing, Accounting Records, Data Entry, Business Process Automation, Tax Compliance, Document Management, Spreadsheet Software, Excel Formulas, Financial Controls, Verification And Validation
Beginner · Course · 1 - 3 Months
Skills you'll gain: Workflow Management, Construction Management, Project Scoping, Collaborative Software, Project Management, Project Planning, Project Management Software, Project Coordination, Business Workflow Analysis, Project Controls, Project Schedules, Resource Management, Resource Allocation, Process Design, Collaboration, Team Oriented, Case Studies, Scheduling, Automation, Budgeting
Intermediate · Course · 1 - 4 Weeks

Pragmatic AI Labs
Skills you'll gain: Amazon Bedrock, AI Security, Retrieval-Augmented Generation, Docker (Software), Prompt Engineering, GitHub Copilot, Token Optimization, Agentic Workflows, AI Orchestration, LLM Application, Debugging, Serverless Computing, Software As A Service, Model Context Protocol, Amazon Web Services, Large Language Modeling, Rust (Programming Language), Code Review, Natural Language Processing, GitHub
Beginner · Specialization · 3 - 6 Months

Board Infinity
Skills you'll gain: Application Programming Interface (API), API Gateway, GraphQL, API Design, Restful API, OAuth, Software Documentation, Authentications, Debugging, Real Time Data, Authorization (Computing)
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Case Studies, Fraud detection, Project Design, Project Risk Management, Project Planning, Business Ethics, Law, Regulation, and Compliance, Scalability, Content Strategy, Quality Assessment, Keyword Research, Search Engine Optimization, Content Creation
Intermediate · Course · 1 - 4 Weeks