Java, Python, C#, Ruby, JavaScript, HTML5, CSS3, React.js, Angular, Vue.js, jQuery, Node.js, Spring Boot, Django, Ruby on Rails, React Native, Flutter, Swift, Kotlin, MySQL, PostgreSQL, MongoDB, SQL Server, RESTful APIs, GraphQL, Git, GitHub, GitLab, AWS, Microsoft Azure, Google Cloud, cloud storage, compute, networking, database services, cloud security, IAM, AWS Lambda, Azure Functions, Docker, Kubernetes, Jenkins, GitLab CI, CircleCI, Terraform, SAP, Oracle ERP, Microsoft Dynamics, business process automation, Power BI, Tableau, Qlik, Python, Pandas, NumPy, Matplotlib, R, Hadoop, Apache Spark, Snowflake, Redshift, Google BigQuery, TensorFlow, PyTorch, scikit-learn, Cisco, Juniper, TCP/IP, VPN, DNS, DHCP, Windows Server, Linux, Ansible, Chef, Puppet, firewalls, intrusion detection, penetration testing, SSL, TLS, IPsec, ethical