Software testing courses can help you learn test planning, test case design, automated testing, and performance testing. You can build skills in identifying bugs, writing effective test scripts, and using various testing methodologies. Many courses introduce tools like Selenium for automation, JUnit for unit testing, and JIRA for issue tracking, showing how these skills apply in real-world software development environments.

EDUCBA
Skills you'll gain: Process Driven Development, Software Quality Assurance, Process Management, Software Development, Embedded Software, Verification And Validation, Software Engineering, Software Development Life Cycle, Software Development Methodologies, Quality Assurance, Systems Engineering, Configuration Management, Requirements Analysis, Change Requests, Process Modeling, Quality Control
★ 4.4 (74) · Beginner · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Responsive Web Design, HTML and CSS, Web Design, Bootstrap (Front-End Framework), Web Design and Development, Web Development, Web Applications, Hypertext Markup Language (HTML), Cascading Style Sheets (CSS), Browser Compatibility, User Interface and User Experience (UI/UX) Design, User Experience Design, Requirements Analysis, Requirements Elicitation, Client Services, Javascript
★ 4.7 (56) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Model Training, Data Import/Export, Model Evaluation, No-Code Development, Exploratory Data Analysis, Predictive Modeling, Applied Machine Learning, Data Pipelines, Machine Learning Software, Data Preprocessing, Data Analysis, Machine Learning, Predictive Analytics
★ 4.5 (63) · Beginner · Guided Project · Less Than 2 Hours

DeepLearning.AI
Skills you'll gain: AI Orchestration, Agentic Workflows, Generative AI Agents, Agentic systems, LLM Application, Tool Calling, Software Design Patterns
★ 4.5 (53) · Beginner · Project · Less Than 2 Hours

Skills you'll gain: Linux Commands, Metasploit, Open Web Application Security Project (OWASP), Linux, Penetration Testing, Exploit development, Vulnerability Scanning, Command-Line Interface, Exploitation techniques, Security Testing, Linux Administration, Scripting, Vulnerability Assessments, Hardening, Brute-force attacks, General Networking, Scripting Languages, Shell Script, Cybersecurity, Network Security
★ 4.3 (50) · Beginner · Specialization · 3 - 6 Months
Georgia Institute of Technology
Skills you'll gain: Software-Defined Networking, Virtual Networking, Network Performance Management, Network Infrastructure, Data Centers, Network Architecture, Computer Networking, Cloud Computing, Cloud Computing Architecture, Network Switches, Network Routing, Microsoft Azure, General Networking, Test Tools, Network Analysis, Debugging
★ 4.1 (49) · Mixed · Course · 1 - 3 Months

Skills you'll gain: Open Web Application Security Project (OWASP), Exploitation techniques, Vulnerability Assessments, Application Security, Vulnerability Management, Security Controls, Authorization (Computing), Cryptography, System Configuration, Encryption, Software Design
★ 4.4 (75) · Intermediate · Course · 1 - 3 Months

Google Cloud
Skills you'll gain: Infrastructure as Code (IaC), Terraform, Google Cloud Platform, Cloud Infrastructure, Cloud Management, Cloud Storage, Command-Line Interface, Code Reusability, Configuration Management, Dependency Analysis
★ 4.6 (61) · Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Java, Software Development Tools, Application Servers, Web Applications, Development Environment, Java Programming, Java Platform Enterprise Edition (J2EE), Application Development, Program Development, Mobile Development, Computer Programming, UI Components, Event-Driven Programming, User Interface (UI), Command-Line Interface
★ 4.4 (61) · Intermediate · Course · 1 - 4 Weeks

University of Colorado System
Skills you'll gain: Software Design Documents, Data Flow Diagrams (DFDs), User Requirements Documents, Functional Requirement, Software Documentation, Diagram Design, Unified Modeling Language, Functional Specification, Requirements Analysis, System Requirements, Technical Documentation, Data Modeling, Systems Analysis, Security Requirements Analysis, Process Modeling, Computational Logic
★ 4.3 (59) · Beginner · Course · 1 - 3 Months
University of California, Irvine
Skills you'll gain: Blockchain, Cryptography, Cryptographic Protocols, Encryption, Public Key Infrastructure, Key Management, Transaction Processing, Authentications, Data Security, Information Privacy, Data Integrity
★ 4.5 (53) · Beginner · Course · 1 - 4 Weeks

Infosec
Skills you'll gain: MITRE ATT&CK Framework, Penetration Testing, Exploitation techniques, Brute-force attacks, Cyber Operations, Scripting, Cybersecurity, Python Programming, Network Analysis, Automation
★ 4.4 (56) · Mixed · Course · 1 - 4 Weeks