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: Web Analytics and SEO, Search Engine Optimization, Google Analytics, Content Performance Analysis, Keyword Research, Marketing Analytics, Content Strategy, Content Creation, Key Performance Indicators (KPIs), Performance Metric, Dashboard, Ad Hoc Analysis, Data-Driven Decision-Making, Variance Analysis, User Flows, Statistical Analysis, Quality Assessment, Corrective and Preventive Action (CAPA)
Intermediate · Course · 3 - 6 Months

Skills you'll gain: API Design, Cloud Solutions, Network Troubleshooting, Server Side, Cloud Deployment, Back-End Web Development, Data Pipelines
Beginner · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Unit Testing, Angular, Software Testing, Frontend Performance, Software Architecture, Software Design, Application Programming Interface (API), Restful API, Performance Tuning, Authentications, Authorization (Computing), Scalability, TypeScript
Intermediate · Course · 1 - 4 Weeks

The Hong Kong University of Science and Technology
Skills you'll gain: Probability, Computational Logic, Combinatorics, Bayesian Statistics, Algorithms, Theoretical Computer Science, Mathematical Software, Mathematical Theory & Analysis, Cryptography, Logical Reasoning, Deductive Reasoning, Computational Thinking, Computer Science, Encryption, Data Structures, Arithmetic, General Mathematics, Public Key Cryptography Standards (PKCS), Problem Solving, Cybersecurity
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Responsive Web Design, HTML and CSS, Web Design and Development, Software Testing, Web Development Tools, Maintainability
Beginner · Course · 1 - 4 Weeks

Logical Operations
Skills you'll gain: Microsoft Project, Resource Management, Project Management Software, Resource Allocation, Project Schedules, Project Planning, Project Design, Project Scoping, Microsoft 365, Project Management, Work Breakdown Structure, Project Coordination, Microsoft Office, Project Estimation, Timelines, Scheduling, Project Documentation, Dependency Analysis, Productivity Software, User Interface (UI)
Mixed · Course · 1 - 3 Months

Skills you'll gain: Recurrent Neural Networks (RNNs), Transfer Learning, Convolutional Neural Networks, Deep Learning, Keras (Neural Network Library), Tensorflow, Artificial Neural Networks, PyTorch (Machine Learning Library), Image Analysis, Natural Language Processing, Computer Vision, Model Evaluation, Data Preprocessing
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Spatial Data Analysis, GIS Software, Geospatial Information and Technology, Spatial Analysis, Geographic Information Systems, Geospatial Mapping, User Interface (UI), Application Development, Python Programming, Application Design, Data Science, Application Deployment, User Interface (UI) Design
Beginner · Course · 1 - 3 Months

Skills you'll gain: GitHub, User Interface (UI) Design, 3D Assets
Advanced · Course · 1 - 3 Months

Microsoft
Skills you'll gain: Team Management, Governance
Intermediate · Course · 1 - 3 Months

Coursera
Beginner · Specialization · 3 - 6 Months

Alex Genadinik
Skills you'll gain: Podcasting, Search Engine Optimization, Brand Awareness, Sales Prospecting, Web Analytics and SEO, Media Relations, Public Relations, Promotional Strategies, Lead Generation
Mixed · Course · 1 - 4 Weeks