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.

Skills you'll gain: JSON, Application Programming Interface (API), Restful API, Javascript, Web Applications, Hypertext Markup Language (HTML), Servers, Cascading Style Sheets (CSS)
★ 4.8 (15) · Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Spring Framework, Model View Controller, Java Platform Enterprise Edition (J2EE), Application Performance Management, Software Design Patterns, Java Programming, Java, Enterprise Architecture, Enterprise Application Management, Secure Coding, Software Design, System Monitoring, Security Controls, Software Architecture, Application Security, Application Frameworks, Web Applications, OS Process Management, Memory Management, Data Sharing
★ 3.9 (14) · Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Open Web Application Security Project (OWASP), Mobile Security, Network Security, Cybersecurity, Cryptography, Penetration Testing, Intrusion Detection and Prevention, Vulnerability Assessments, Wireless Networks, Encryption, Application Security, Exploitation techniques, Web Applications, Cloud Security, Internet Of Things
★ 4.9 (20) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Cross-Functional Collaboration, Project Management Software, Workflow Management, Coordinating, Organizational Skills, Project Management, Organizational Structure, Accountability Frameworks
★ 4.7 (18) · Beginner · Guided Project · Less Than 2 Hours

University of Colorado Boulder
Skills you'll gain: Packaging and Labeling, Sustainable Design, Sustainable Business, Sustainable Technologies, Sustainable Development, Environmental Laws, Waste Minimization, Sustainable Engineering, Environmental Regulations, Corporate Sustainability, Sustainable Systems, Logistics, Environmental Issue, Design, Consumer Behaviour, Innovation, Materials science
★ 5 (20) · Intermediate · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: SQL, Oracle Databases, Database Design, Relational Databases, Database Systems, Database Theory, Database Management, Databases, Query Languages, Data Integrity, Transaction Processing
★ 4.9 (16) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Ansible, Infrastructure as Code (IaC), Devops Tools, YAML, IT Automation, Docker (Software), Containerization, Amazon Elastic Compute Cloud, Data Security, Encryption, Python Programming, Performance Tuning, Configuration Management
★ 4.6 (18) · Beginner · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Agile Software Development, Program Management, Responsible AI, Planning, Generative AI, AI literacy, Risk Analysis, Prompt Engineering, Analytics
★ 4.5 (15) · Intermediate · Course · 1 - 4 Weeks

Imperial College London
Skills you'll gain: Molecular, Cellular, and Microbiology, Molecular Biology, Microbiology, Life Sciences, Infectious Diseases, Biotechnology, Cell Cultures, Cell Biology, Laboratory Testing, Epidemiology, Laboratory Research, Biology, Diagnostic Tests
★ 4.8 (16) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Cloud-Native Computing, Cloud Applications, Cloud Development, API Gateway, Cloud API, Google Cloud Platform, Application Programming Interface (API), Cloud-Based Integration, Authentications, Serverless Computing, Identity and Access Management, API Design, Event-Driven Programming, Node.JS, Authorization (Computing)
★ 4.3 (36) · Intermediate · Course · 1 - 3 Months

Pontificia Universidad Católica de Chile
Skills you'll gain: Structural Analysis, Civil Engineering, Engineering Analysis, Engineering, Mechanics, Engineering Calculations, Hydraulics, Failure Analysis, Laboratory Testing
★ 4.8 (25) · Beginner · Course · 1 - 3 Months

DeepLearning.AI
Skills you'll gain: LLM Application, Tool Calling, Large Language Modeling, Generative AI Agents, AI Workflows, Context Management, Memory Management, Prompt Engineering, Agentic systems, Data Persistence, System Design and Implementation
★ 4.6 (18) · Intermediate · Project · Less Than 2 Hours