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.

Duke University
Skills you'll gain: Command-Line Interface, Scripting, Unix Commands, Computer Programming Tools, Scripting Languages, Data Manipulation, Python Programming
Beginner · Guided Project · Less Than 2 Hours
Codio
Skills you'll gain: OAuth, Web Development Tools, Authentications, Web Servers, Application Programming Interface (API), Cloud API, Restful API, Server Side, JSON, Software Documentation, Javascript, Web Services, Application Security
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Text Mining, Data Processing, Microsoft Azure, Cloud Storage, Database Development, Data Storage Technologies, Unstructured Data, Application Development, Web Applications
Beginner · Guided Project · Less Than 2 Hours

Skills you'll gain: Cryptography, Network Security, OSI Models, Public Key Infrastructure, Network Protocols, Encryption, Remote Access Systems, Firewall, Brute-force attacks, Emerging Technologies, TCP/IP, Wireless Networks, Authentications
Advanced · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Human Computer Interaction, Embedded Systems, Prototyping, User Interface (UI) Design, User Interface and User Experience (UI/UX) Design, Usability, HTML and CSS, Real-Time Operating Systems, Internet Of Things, jQuery, Mobile Development, Telecommunications, Cross Platform Development, Artificial Intelligence and Machine Learning (AI/ML)
Build toward a degree
Intermediate · Course · 1 - 4 Weeks

Packt
Skills you'll gain: Identity and Access Management, Application Security, Secure Coding, Security Testing, Information Systems Security, Cyber Security Assessment, Security Engineering, Security Controls, Risk Management Framework, Cybersecurity, Authentications, Threat Modeling, Network Security, Risk Management, Infrastructure Security, Data Security, Continuous Monitoring, Software Development Life Cycle, Authorization (Computing), Cryptography
Intermediate · Course · 1 - 3 Months

DeepLearning.AI
Skills you'll gain: AI Orchestration, LLM Application, AI Workflows, OpenAI API, Tool Calling, Retrieval-Augmented Generation, Prompt Engineering, Agentic systems, Data Pipelines
Intermediate · Project · Less Than 2 Hours

Skills you'll gain: Javascript, Data Persistence, Scripting, Scripting Languages, Data Storage, Web Development, Functional Design, Data Structures, Business Logic, Game Design, Software Engineering
Beginner · Guided Project · Less Than 2 Hours

Skills you'll gain: Plotly, Plot (Graphics), Data Visualization, Statistical Visualization, Box Plots, Scatter Plots, Interactive Data Visualization, Data Visualization Software, Histogram, Statistical Analysis, Data Analysis, Probability
Beginner · Guided Project · Less Than 2 Hours

Google Cloud
Skills you'll gain: Google Cloud Platform, Cloud Computing Architecture, Cloud Solutions, Cloud Computing, Cloud Infrastructure, Business Systems Analysis, Solution Architecture, Test Planning, Systems Analysis, Solution Design, Cloud Security, User Acceptance Testing (UAT), Scalability
Advanced · Course · 1 - 3 Months

Skills you'll gain: MongoDB, Data Transformation, Customer Analysis, Data Analysis, Back-End Web Development, Customer Data Management, Data Processing, NoSQL, Data Maintenance, Pandas (Python Package), Database Design, Data Validation, Financial Data, Data Import/Export, Database Management, Data Cleansing, Databases, Data Pipelines, Data Access, Query Languages
Beginner · Specialization · 1 - 3 Months

Edureka
Skills you'll gain: Performance Tuning, Web Development, Web Services, Web Applications, Object Oriented Design, Software Architecture, Microservices, Network Security, Data Structures
Beginner · Course · 1 - 3 Months