Core Java courses can help you learn object-oriented programming, exception handling, multithreading, and Java Collections. You can build skills in writing efficient algorithms, debugging code, and developing user interfaces. Many courses introduce tools like Eclipse and IntelliJ IDEA, which are commonly used for coding and testing Java applications, along with frameworks such as Spring and Hibernate that facilitate web development and database management.

Skills you'll gain: PySpark, Apache Spark, Apache Hadoop, Data Pipelines, Big Data, Data Processing, Distributed Computing, Data Analysis Expressions (DAX), Data Integration, Data Transformation, SQL, Data Manipulation, Data Cleansing
Intermediate · Course · 1 - 3 Months

Skills you'll gain: GitHub, Authentications, Test Case, Eclipse (Software), Verification And Validation, Extensible Markup Language (XML), Software Installation
Intermediate · Course · 3 - 6 Months

Skills you'll gain: Penetration Testing, Network Security, Vulnerability Scanning, Wireless Networks, Cybersecurity, Exploitation techniques, Linux, Vulnerability Assessments, Information Systems Security, Command-Line Interface, Network Analysis, Encryption, Virtual Private Networks (VPN), System Configuration, Software Installation, File Management, Virtual Machines
Beginner · Course · 1 - 3 Months

Skills you'll gain: Cascading Style Sheets (CSS), UI Components, Front-End Web Development, User Interface and User Experience (UI/UX) Design, Web Design, React.js, Responsive Web Design, User Centered Design, Javascript
Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Apple iOS, Apple Xcode, Swift Programming, iOS Development, Core Data (Software), Mobile Development, Secure Coding, User Interface (UI), Application Deployment, Scalability, User Interface (UI) Design, UI Components, Debugging, Data Management, Model View Controller, Performance Tuning, Programming Principles, Application Programming Interface (API), Application Security, Data Storage
Beginner · Specialization · 1 - 3 Months

Coursera
Skills you'll gain: Vue.JS, Web Development Tools, Web Applications, Front-End Web Development, HTML and CSS, Javascript, Microsoft Visual Studio
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Role-Based Access Control (RBAC), Microsoft Azure, Azure Active Directory, Identity and Access Management, Solution Architecture, Data Governance, Data Management, Cloud Security, Cloud Computing Architecture, System Monitoring, Cloud Computing, Key Management
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Kubernetes, Containerization, Cloud-Native Computing, Infrastructure Security, Role-Based Access Control (RBAC), Linux Administration, Infrastructure Architecture, Data Storage Technologies, Command-Line Interface, Servers, System Monitoring, System Configuration, Application Programming Interface (API)
Intermediate · Course · 1 - 4 Weeks

Simplilearn
Skills you'll gain: User Story, Agile Software Development, Agile Project Management, Backlogs, Scaled Agile Framework, Agile Methodology, Sprint Retrospectives, Sprint Planning, Change Management, Team Building, Kanban Principles, Project Management, Estimation, Prioritization
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Post-Production, Storytelling, Video Editing, Timelines, Color Theory, Data Import/Export, Image Quality, Web Content Accessibility Guidelines, Music, Editing
Mixed · Course · 1 - 3 Months

DeepLearning.AI
Skills you'll gain: LLM Application, OpenAI, Tool Calling, Generative AI Agents, Artificial Intelligence, Application Development, Application Frameworks, Data Pipelines
Intermediate · Project · Less Than 2 Hours

Johns Hopkins University
Skills you'll gain: Distributed Computing, Scalability, Database Design, Database Management Systems, Database Systems, Database Architecture and Administration, Database Management, Databases, Relational Databases, SQL, Query Languages, Performance Tuning, Data Integrity
Intermediate · Course · 1 - 4 Weeks