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.

Xi'an Jiaotong University
Skills you'll gain: Microsoft SQL Servers, SQL, Relational Databases, Database Management, Database Theory, Database Development, Database Design, Database Management Systems, Database Architecture and Administration, Query Languages, Data Access, Software Installation, C# (Programming Language), Data Integrity, Data Modeling
★ 4.7 (61) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Embedded Software, Embedded Systems, Peripheral Devices, C (Programming Language), System Programming, Program Development, Hardware Architecture, Data Structures, Debugging, Development Environment, C and C++, Performance Tuning, Integrated Development Environments
★ 4.5 (51) · Advanced · Course · 1 - 4 Weeks

Packt
Skills you'll gain: Data Analysis Expressions (DAX), Customer Insights, Power BI, Data Modeling, Customer Analysis, Dashboard, Data Transformation, Dashboard Creation, Data Wrangling, Data Import/Export, Data Manipulation, Database Design, Business Intelligence, Interactive Data Visualization, Data Integration, Star Schema, Time Series Analysis and Forecasting, Data Cleansing, Relational Databases, Data Visualization Software
★ 4.8 (14) · Beginner · Specialization · 1 - 4 Weeks

Peking University
Skills you'll gain: Research, Research Methodologies, Legal Research, Research Design, Writing, Legal Writing, Research Reports, Databases, Journals
★ 4.4 (47) · Mixed · Course · 1 - 3 Months

28DIGITAL
Skills you'll gain: Computational Logic, Markov Model, Verification And Validation, Theoretical Computer Science, Mathematical Modeling, Systems Analysis, Software Testing, Statistical Modeling, Process Modeling, Probability, Algorithms, Probability Distribution, Applied Mathematics
★ 4.3 (54) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Restful API, Model View Controller, ASP.NET, OAuth, API Design, Web Development, Application Programming Interface (API), .NET Framework, Web Services, Authentications, Unit Testing, Back-End Web Development, C# (Programming Language), Web Applications, Object-Relational Mapping, Application Frameworks, API Testing, Authorization (Computing), Cloud Computing, Computer Programming
★ 4.7 (38) · Beginner · Course · 1 - 4 Weeks

EDUCBA
Skills you'll gain: Software Development
★ 4.9 (20) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Generative AI Agents, Model Context Protocol, Retrieval-Augmented Generation, Generative Model Architectures, Fine-tuning, Model Deployment, Responsible AI, Load Balancing, Large Language Modeling, Containerization, AI Security, Docker (Software), Model Optimization, Generative AI, Model Evaluation, Agentic systems, LangChain, Restful API, Data Ethics, Image Quality
★ 4.3 (6) · Intermediate · Professional Certificate · 3 - 6 Months

Skills you'll gain: Routing Protocols, TCP/IP, Network Switches, Network Routers, Virtual Local Area Network (VLAN), Network Protocols, Network Security, General Networking, Network Routing, Network Troubleshooting, Network Administration, Computer Networking, Open Shortest Path First (OSPF), Network Monitoring, Dynamic Host Configuration Protocol (DHCP), Local Area Networks, Network Planning And Design, Border Gateway Protocol, Network Performance Management, Proxy Servers
★ 4.8 (16) · Intermediate · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: AI Orchestration, AI Workflows, CrewAI, LangGraph, Agentic Workflows, LLM Application, LangChain, Large Language Modeling, Agentic systems, Generative AI Agents, AI Integrations, Application Deployment, Artificial Intelligence and Machine Learning (AI/ML), Software Architecture, Systems Architecture, Context Management, API Design, Software Design, Data Validation, Memory Management
★ 4 (6) · Intermediate · Specialization · 1 - 3 Months

Dartmouth College
Skills you'll gain: Structural Analysis, Structural Engineering, Civil Engineering, Engineering Calculations, Engineering Analysis, Construction, Materials science, Mechanics, Engineering Design Process, Design
★ 4.8 (40) · Beginner · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: ABAP RESTful Programming Model (RAP), SAP S/4HANA, Restful API, Core Data (Software), Security Controls, HTML and CSS, UI Components, User Interface (UI) Design
★ 4.4 (8) · Intermediate · Course · 1 - 4 Weeks