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.

Pearson
Skills you'll gain: Virtual Local Area Network (VLAN), Network Security, Network Troubleshooting, Dynamic Host Configuration Protocol (DHCP), Network Architecture, TCP/IP, Routing Protocols, Network Switches, Network Routing, Open Shortest Path First (OSPF), Wireless Networks, Network Support, Network Routers, Virtual Networking, Ansible, General Networking, Network Infrastructure, Software-Defined Networking, Network Planning And Design, Virtual Private Networks (VPN)
Beginner · Specialization · 1 - 3 Months

LearnQuest
Skills you'll gain: Incident Response, Cyber Threat Hunting, Computer Security Incident Management, Incident Management, Intrusion Detection and Prevention, Cyber Threat Intelligence, Continuous Monitoring, Threat Detection, Cyber Security Strategy, Security Strategy, Cloud Security, Disaster Recovery, Threat Management, Firewall, Network Security, Cybersecurity, Cloud Services, AI Security, Network Monitoring, Cloud Management
Advanced · Specialization · 1 - 3 Months

LearnKartS
Skills you'll gain: Amazon Web Services, AWS Identity and Access Management (IAM), Serverless Computing, Amazon S3, Identity and Access Management, Cloud Computing Architecture, Disaster Recovery, Amazon Elastic Compute Cloud, Solution Architecture, Amazon CloudWatch, Cloud Infrastructure, Systems Architecture, Amazon Redshift, Cloud Hosting, Amazon DynamoDB, Network Troubleshooting, Cloud Services, Computing Platforms, Cloud Computing, API Gateway
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Apache Kafka, Apache Hadoop, Apache Spark, Real Time Data, Scala Programming, Data Integration, Command-Line Interface, AWS Kinesis, Apache Hive, Big Data, Applied Machine Learning, Data Processing, Systems Design, System Design and Implementation, Apache Cassandra, Data Pipelines, Java, Distributed Computing, Query Languages, IntelliJ IDEA
Intermediate · Specialization · 3 - 6 Months

LearnQuest
Skills you'll gain: Network Architecture, Emerging Technologies, Internet Of Things, Network Security, Network Protocols, Wireless Networks, Network Performance Management, Network Planning And Design, Network Engineering, Communication Systems, Mobile Security, Network Infrastructure, Cybersecurity, Telecommunications, Artificial Intelligence and Machine Learning (AI/ML), Vulnerability Assessments, Distributed Computing, Technology Strategies, Digital Signal Processing
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: NumPy, Pandas (Python Package), File I/O, Image Analysis, Data Manipulation, Matplotlib, Web Design and Development, Computer Vision, Data Analysis, Plot (Graphics), Object Oriented Design, Python Programming, Database Systems, Application Design, Programming Principles, Code Reusability, Scripting, File Management, Data Structures, UI Components
Beginner · Specialization · 3 - 6 Months

Scrimba
Skills you'll gain: Object Oriented Programming (OOP), Object Oriented Design, Javascript, Application Programming Interface (API), Code Reusability, Software Design Patterns, Data Management, Data Structures, Event-Driven Programming, Web Development, Programming Principles, Data Import/Export, Software Development, Software Engineering, Performance Tuning, Data Mapping
Intermediate · Specialization · 1 - 3 Months

Pontificia Universidad Católica del Perú
Skills you'll gain: User Story, Human Computer Interaction, Software Development Life Cycle, Functional Requirement, Unified Modeling Language, User Experience Design, User Interface (UI), Software Development Methodologies, Requirements Analysis, Prototyping, User Experience, User Interface (UI) Design, User Requirements Documents, User Interface and User Experience (UI/UX) Design, System Requirements, Interaction Design, Functional Specification, Requirements Elicitation, Software Development, Process Driven Development
Beginner · Specialization · 3 - 6 Months

Johns Hopkins University
Skills you'll gain: Hardware Design, Electronic Hardware, Schematic Diagrams, Electronics, Computer-Aided Design, Electronic Systems, Mechanical Design, Drafting and Engineering Design, Communication Systems, Electronics Engineering, Remote Access Systems, Linux, Digital Communications, Restful API, Electrical Engineering, Web Applications, Telecommunications, Systems Of Measurement, Digital Signal Processing, Data Processing
Beginner · Specialization · 3 - 6 Months

Board Infinity
Skills you'll gain: User Interface (UI), User Interface and User Experience (UI/UX) Design, Bootstrap (Front-End Framework), Web Design, Cascading Style Sheets (CSS), UI Components, Secure Coding, Full-Stack Web Development, Web Applications, Database Development, Frontend Integration, JavaScript Frameworks, Database Management, Hypertext Markup Language (HTML), Software Architecture, Development Environment, Software Testing, Development Testing, NoSQL, API Design
Beginner · Specialization · 1 - 3 Months

Microsoft
Skills you'll gain: Responsive Web Design, Git (Version Control System), Web Development, Cascading Style Sheets (CSS), Data Persistence, React.js, Version Control, Performance Tuning, Full-Stack Web Development, GitHub, Event-Driven Programming, HTML and CSS, Application Design, Development Testing, Video Game Development, Software Design Documents, Game Design, Program Development, Software Testing, Javascript
Beginner · Professional Certificate · 3 - 6 Months

Birla Institute of Technology & Science, Pilani
Skills you'll gain: Computer Architecture, Hardware Architecture, Microarchitecture, Computer Systems, Computational Logic, Hardware Design, Computer Hardware, Programming Principles, System Programming, Systems Architecture, Program Development, Data Storage, Memory Management
Build toward a degree
Beginner · Course · 1 - 3 Months