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.

Cisco Learning and Certifications
Skills you'll gain: Open Shortest Path First (OSPF), Network Administration
Beginner · Course · 1 - 3 Months

LearnKartS
Skills you'll gain: Amazon Web Services, Disaster Recovery, Serverless Computing, Cloud Computing Architecture, Solution Architecture, Cloud-Native Computing, Containerization, Cloud Engineering, Kubernetes, AWS Identity and Access Management (IAM), Hybrid Cloud Computing, Amazon Elastic Compute Cloud, Cloud Security, Cloud Solutions, Docker (Software), Cloud Services, Cloud Storage, Systems Architecture, Software Architecture, Cloud Computing
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Frontend Performance, React.js, JavaScript Frameworks, Front-End Web Development, HTML and CSS, Web Development, Web Design, Cascading Style Sheets (CSS), Microsoft Visual Studio
Intermediate · Guided Project · Less Than 2 Hours

Coursera
Skills you'll gain: SQL, Relational Databases, Database Management, Database Systems, Performance Tuning, Databases, Database Administration, Query Languages
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: AI Personalization, Proposal Writing, Proposal Development, Sales Presentation, Sales Strategy, Generative AI Agents, Storytelling, Presentations, Sales Process, Content Performance Analysis, Personalized Service, Market Research, Customer Analysis, Data-Driven Decision-Making, Microsoft PowerPoint, Competitive Analysis
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Prompt Engineering, ChatGPT, Generative AI, OpenAI, Multimodal Prompts, OpenAI API, LLM Application, AI Product Strategy, Productivity Software, Creative Design, Marketing Strategy and Techniques, Responsible AI, A/B Testing, Time Management
Beginner · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Apple iOS, Swift Programming, Apple Xcode, Mobile Development, User Interface (UI), User Interface (UI) Design, Debugging, Data Persistence, Data Management, Programming Principles, Application Programming Interface (API), Data Storage, Authentications
Beginner · Course · 1 - 4 Weeks

AI CERTs
Skills you'll gain: Responsible AI, Agentic Workflows, Risking, Generative AI Agents, AI Enablement, Artificial Intelligence and Machine Learning (AI/ML), Power BI, AI Workflows, Accounting and Finance Software, Regulatory Compliance, Automation, Financial Data, Wealth Management, Compliance Management, Generative AI, Financial Forecasting, Data Processing, Finance, Workflow Management, General Finance
Intermediate · Course · 1 - 3 Months

Skills you'll gain: z/OS, Operating Systems, System Programming, Mainframe Computing, System Monitoring, Performance Tuning, System Configuration, OS Process Management, Data Storage, Systems Architecture, Capacity Management, Problem Management, Disaster Recovery, Computer Architecture, Data Access
Intermediate · Course · 1 - 3 Months

Coursera
Skills you'll gain: Program Management, Project Design, Program Evaluation, Project Management Life Cycle, Process Flow Diagrams, Project Management, Diagram Design, Project Management Software, Program Development, Agile Methodology
Intermediate · Guided Project · Less Than 2 Hours

SkillsBooster Academy
Skills you'll gain: Presentations, Branding, Sales Presentation, Brand Marketing, Data Presentation, Workflow Management, Marketing Design, Brand Management, Multimedia, Data Visualization, Visual Design, Interactive Data Visualization, Graphic and Visual Design Software, Brand Awareness, Visualization (Computer Graphics), Brand Loyalty, Design Reviews, Statistical Visualization, Executive Presence, Visual Impairment Education
Beginner · Course · 1 - 3 Months

Skills you'll gain: Kubernetes, Containerization, Test Case, YAML, Scenario Testing, Command-Line Interface, Linux Commands, Solution Design, Scalability, Network Infrastructure
Intermediate · Course · 1 - 4 Weeks