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.

Coursera
Skills you'll gain: Data Ethics, Responsible AI, Compliance Auditing, Ethical Standards And Conduct, Compliance Management, Auditing, Technical Documentation, Case Studies, Project Documentation, Model Deployment, Model Evaluation, Business Ethics, MLOps (Machine Learning Operations), Accountability, Data Quality
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Test Case, Test Automation, Test Execution Engine, Regression Testing, CI/CD, API Testing, Continuous Integration, Continuous Deployment, No-Code Development, Test Planning, Test Data, Maintainability, Debugging, Scalability
Advanced · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Security Information and Event Management (SIEM), Cloud Security, Event Monitoring, Business Continuity Planning, System Monitoring, Network Security, Continuous Monitoring, Disaster Recovery, Incident Response, Cloud Computing, Zero Trust Network Access, Computer Security Incident Management, Data Security, Firewall, Virtual Private Networks (VPN), Service Level, Vulnerability Management, Patch Management, Clinical Monitoring, Configuration Management
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Test Script Development, API Testing
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Market Research, Market Analysis, Business Research, Research Reports, Market Intelligence, Competitive Analysis, Quantitative Research, Analytical Skills, Case Studies, Report Writing, Analysis, Strategic Decision-Making, Business Strategy, Business Acumen
Mixed · Course · 1 - 4 Weeks

Google Cloud
Skills you'll gain: Prompt Engineering, Generative AI Agents, Google Gemini, Responsible AI, AI Security, Generative AI, Google Workspace, Retrieval-Augmented Generation, Gemini, AI Enablement, Google Cloud Platform, Large Language Modeling, AI Product Strategy, AI Workflows, Tool Calling, Unstructured Data, Productivity Software, Artificial Intelligence, Cloud Computing, Collaboration
Beginner · Specialization · 3 - 6 Months

Packt
Skills you'll gain: Ajax, JavaScript Frameworks, Web Applications, Javascript, Web Development Tools, Model View Controller, Event-Driven Programming, UI Components, HTML and CSS, Data Mapping, User Interface (UI), Routing Protocols, Restful API
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Unreal Engine, 3D Assets, Virtual Environment, 3D Modeling, User Interface (UI), Computer Graphics, Animations, Game Design, Performance Tuning
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Content Performance Analysis, Keyword Research, Content Creation, Search Engine Optimization, Content Management, Content Strategy, Scheduling, Generative AI, Report Writing
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: React.js, UI Components, User Interface (UI), Web Applications, User Accounts, Front-End Web Development, User Interface and User Experience (UI/UX) Design, Secure Coding, Javascript, Authorization (Computing), Authentications, Data Validation
Intermediate · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Network Performance Management, Software-Defined Networking, Network Administration, Network Routing, Wide Area Networks, Network Monitoring, Disaster Recovery, Virtual Networking, Performance Tuning, General Networking, Network Engineering, Network Planning And Design, Network Troubleshooting, Network Security, Cyber Security Assessment, Vulnerability Scanning, Continuous Monitoring, Security Management, Patch Management, Application Performance Management
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Extract, Transform, Load, Data Pipelines, Data Integration, File Management, Scalability, Data Processing, Context Management, Java, Data Transformation, Maintainability
Mixed · Course · 1 - 4 Weeks