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.

Board Infinity
Skills you'll gain: Quality Assurance, Software Quality Assurance, Test Planning, Test Case, Continuous Integration, DevOps, Software Testing, Regression Testing, Test Execution Engine, Software Engineering Tools, Agile Methodology, Issue Tracking, Risk Management Framework, Automation
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Role-Based Access Control (RBAC), Postman API Platform, Authentications, API Testing, Authorization (Computing), Restful API, Secure Coding, Java Programming, Application Design, Spring Boot, User Accounts, API Design
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Instagram, Social Media Management, Social Media Content, Social Media Marketing, Facebook, Social Media Strategy, Target Audience, Graphic Design
Beginner · Guided Project · Less Than 2 Hours

HubSpot Academy
Skills you'll gain: Sales Presentations, Prospecting and Qualification, Persona Development, Sales Strategy, Sales Process, Target Audience, Sales Pipelines, Sales, Lead Generation, Customer Analysis, Email Automation, Prioritization, Customer Engagement
Beginner · Course · 1 - 3 Months

EDUCBA
Skills you'll gain: Model View Controller, Java Platform Enterprise Edition (J2EE), Back-End Web Development, Server Side, Data Access, Apache Tomcat, Application Servers, Relational Databases, Databases, Java, Web Servers, SQL, Authentications, Web Applications, Secure Coding, Software Design Patterns, Data Persistence, Context Management
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Infographics, Process Design, Diagram Design, Business Process, Target Audience, Data Visualization, Content Creation, Timelines, Business Strategy
Beginner · Guided Project · Less Than 2 Hours

Skills you'll gain: Tableau Software, Dashboard, Data Visualization Software, Data Visualization, R Programming, Alteryx, Statistical Programming, Data Presentation, Interactive Data Visualization, Data Cleansing, Data Storytelling, Data Structures, Statistical Analysis, Workflow Management, Data Analysis, Scatter Plots, Data Preprocessing, Data Manipulation, Data Processing, Data Transformation
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Campaign Management, Target Market, Marketing, Marketing Strategies, Consumer Behaviour, Marketing Planning, Integrated Marketing Communications, Strategic Marketing, Digital Marketing, Advertising Campaigns, Target Audience, Marketing Effectiveness, Digital Advertising, Online Advertising, Market Research, Customer Analysis, Marketing Communications, Marketing Psychology, Marketing Analytics, Communication Strategies
Mixed · Course · 1 - 3 Months

Skills you'll gain: Autoencoders, Shiny (R Package), Deep Learning, Recurrent Neural Networks (RNNs), Transfer Learning, Convolutional Neural Networks, Image Analysis, PyTorch (Machine Learning Library), Artificial Neural Networks, Artificial Intelligence and Machine Learning (AI/ML), Applied Machine Learning, Tensorflow, Predictive Modeling, Dimensionality Reduction, Classification Algorithms, Time Series Analysis and Forecasting, Model Evaluation
Advanced · Course · 1 - 3 Months

Skills you'll gain: Scalability, Restful API, Rust (Programming Language), Application Programming Interface (API), OS Process Management, Video Game Development, Web Development, JSON, Programming Principles, Servers, Debugging, TCP/IP
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Slack (Software), Marketing Materials, Marketing Design, Shared Media, Multimedia, Content Creation, Social Media Content, Graphic Design, Calendar Management, Content Marketing, User Accounts, Business Communication, Marketing Communications, Cloud-Based Integration, Team Management
Beginner · Guided Project · Less Than 2 Hours

University at Buffalo
Skills you'll gain: Blockchain, Cryptography, Payment Systems, Distributed Computing, Network Model, Transaction Processing, Data Integrity, Emerging Technologies, Virtual Machines, Verification And Validation
Beginner · Course · 1 - 4 Weeks