Data Structures and Algorithms courses can help you learn about arrays, linked lists, trees, and graph structures, along with sorting and searching algorithms. You can build skills in problem-solving, optimizing code efficiency, and analyzing algorithm complexity. Many courses introduce tools like Python, Java, or C++ for implementing these concepts, as well as platforms for coding challenges that reinforce your understanding through practical application.

Johns Hopkins University
Skills you'll gain: Penetration Testing, MITRE ATT&CK Framework, Public Key Infrastructure, Cybersecurity, Cryptography, Cryptographic Protocols, Exploitation techniques, Security Testing, Encryption, Technical Writing, Test Tools, Human Factors (Security), Technical Communication
★ 3.9 (9) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Microsoft Azure, Cloud Security, Infrastructure Security, Security Controls, Kubernetes, Data Security, Microsoft SQL Servers, Virtual Machines, Infrastructure As A Service (IaaS), Remote Access Systems, Network Security, Data Storage Technologies, Cloud Storage, Identity and Access Management, Databases, Authentications, Database Management Systems, Containerization, Key Management, Encryption
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Open Shortest Path First (OSPF), Virtual Local Area Network (VLAN), Wide Area Networks, Network Security, Routing Protocols, Threat Detection, Threat Management, Security Awareness, Network Administration, TCP/IP, Multiprotocol Label Switching, Network Routing, Virtual Private Networks (VPN), Network Troubleshooting, Dynamic Host Configuration Protocol (DHCP), Network Switches, Local Area Networks, Network Protocols
★ 4.6 (22) · Advanced · Course · 3 - 6 Months

Whizlabs
Skills you'll gain: Amazon CloudWatch, Amazon Web Services, AWS CloudFormation, Cloud Management, Infrastructure as Code (IaC), AWS Identity and Access Management (IAM), Configuration Management, Identity and Access Management
Intermediate · Course · 1 - 4 Weeks

Duke University
Skills you'll gain: Music, Sensory Systems Analysis, Music Theory, Aesthetics, World Music, Cultural Diversity, Physiology, Biology
★ 4.3 (730) · Mixed · Course · 1 - 3 Months

Northeastern University
Skills you'll gain: Object Oriented Design, Java, Java Programming, Software Architecture, Object Oriented Programming (OOP), Data Structures, Software Design, Computer Programming, Programming Principles, Code Reusability, Application Development, UI Components, User Interface (UI), Data Management
Mixed · Course · 1 - 3 Months

Amazon Web Services
Skills you'll gain: Root Cause Analysis, Customer Relationship Building, Customer Relationship Management, Relationship Management, Problem Management, Verbal Communication Skills, Cloud Management, Customer Support, Amazon Web Services, Technical Support and Services, Oral Expression, Customer and Client Support, Communication, Consultative Approaches, Technical Support, Cloud Services, Cloud Security, Automation, Collaboration, Incident Management
★ 4.9 (28) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: AI Orchestration, Prompt Patterns, AI Workflows, Agentic Workflows, AI Integrations, OpenAI API, Token Optimization, Test Script Development, Context Management, Code Reusability, Secure Coding, Authentications, Memory Management
Intermediate · Course · 1 - 4 Weeks

University of Michigan
Skills you'll gain: Patient Safety, Healthcare Project Management, Leadership, Continuous Quality Improvement (CQI), Safety Standards, Safety Assurance, Accident Prevention, Decision Making, Health Technology, Teamwork, Reliability, Risk Management, Innovation, Problem Solving
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Salesforce Object Query Language (SOQL), Salesforce, Web Services, Test Script Development, Memory Management, Unit Testing, Development Testing, Debugging, Code Reusability, Simple Object Access Protocol (SOAP), Object Oriented Programming (OOP), Data Management, Performance Tuning, Relationship Management
Intermediate · Course · 3 - 6 Months

Skills you'll gain: File I/O, JSON, Package and Software Management, Authorization (Computing), Web Scraping, Application Programming Interface (API), File Management, Python Programming, Restful API, Authentications, Performance Tuning, Simulations
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Angular, Command-Line Interface, Frontend Performance, Data Sharing
Beginner · Course · 3 - 6 Months