-These are Eduardo Castellini's main professional areas.

A Cloud Architect is an IT professional who designs, implements, and manages an organization's cloud infrastructure, ensuring it meets business objectives in terms of scalability, security, and cost efficiency. This role is essential for companies using or migrating to the public, private, or hybrid cloud, and requires knowledge of technologies such as AWS, Azure, and Google Cloud, as well as skills in networking, operating systems, and software development.

Main responsibilities:

• Develop the strategy: Creates plans for the adoption and use of cloud services, aligned with the company's needs.
• Design architectures: Designs the structure of the cloud solution, including the configuration of components such as computing, databases, storage, and networks.
• Ensure security and compliance: Implements security measures and ensures that the infrastructure complies with regulations and requirements.
• Manage and monitor: Oversees the cloud infrastructure, monitors performance and resource usage to ensure efficiency.
• Optimize costs: Analyzes and manages cloud operational costs, seeking continuous optimizations.
• Guide the team: Acts as a consultant and trains other team members on best practices and the use of cloud tools.

Essential skills:

• Technical skills: In-depth knowledge of cloud computing, networks (such as TCP/IP, DNS, VPN), operating systems, databases, storage, and security.
• Non-technical skills (soft skills): Communication skills, problem-solving abilities, relationship skills, and strategic thinking to understand business requirements and translate them into technical solutions.

Cloud Providers Eduardo's know:

Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP), Oracle Cloud Infrastructure (OCI), Cloudflare.

A network engineer is an IT professional who designs, implements, manages, and secures network infrastructures, from small LANs to complex cloud and hybrid networks. They are responsible for ensuring that data is transmitted efficiently, securely, and reliably through technologies such as routing, switches, and firewalls. The role includes monitoring, troubleshooting, and optimizing network performance using advanced tools and protocols.

Main responsibilities:

• Design and planning: Designing the network architecture to ensure high availability, scalability, and security.
• Implementation: Configuring and installing equipment such as routers, switches, and firewalls.
• Management and maintenance: Monitoring the health of the infrastructure, performing preventive maintenance, and ensuring network quality and security.
• Troubleshooting: Diagnosing and resolving connectivity, security, and performance issues, often on an on-call basis.
• Automation and optimization: Using tools and scripts to automate tasks and optimize network performance.

Network Vendors:

• Cisco.
• Juniper
• Fortinet
• PaloAlto
• Oracle Cloud Infrastructure (OCI) Network.
• Amazon Web Services (AWS) Network.
• Microsoft Azure Network.

A Linux system administrator is responsible for managing, maintaining, and upgrading Linux-based computer systems to ensure they operate reliably and securely. This includes installing and configuring software, managing user accounts, performing backups, and troubleshooting issues. The role often requires a mix of technical skills, such as command-line proficiency, and soft skills like problem-solving and attention to detail.

Responsibilities:

• System management: Installing, configuring, and maintaining Linux servers and desktops.
• Security: Ensuring the security of the operating system and the network it runs on.
• User and access management: Creating and managing user accounts and permissions.
• Maintenance and upgrades: Performing system upgrades, patching, and regular maintenance.
• Troubleshooting: Diagnosing and resolving hardware, software, and network issues.
• Data backup: Implementing and monitoring data backup procedures.
• Automation: Writing scripts (e.g., shell scripts) to automate routine tasks.

Key skills and tools:

• Command-line interface (CLI): Proficiency in using the Linux command line is essential, with the sudo command being crucial for administrative tasks.
• Problem-solving: The ability to analyze and solve complex technical problems efficiently.
• Networking: Knowledge of network infrastructure, including LANs and WANs.
• Scripting: Skills in scripting languages like Bash to automate tasks.
• File and user management: Understanding how to manage files, directories, users, and groups.
• System monitoring: Tools and techniques for monitoring system performance and health.

Career path

• Education: While a bachelor's degree is often a starting point, practical experience and certifications can be more critical.
• Certifications: Relevant certifications can be beneficial, such as those from the Linux Foundation or LPI.
• Job growth: The role is in high demand across various sectors like IT, cybersecurity, and DevOps, leading to good career growth opportunities.

SRE, or Site Reliability Engineering, is a discipline that applies software engineering principles to IT operations to ensure the reliability and scalability of software systems. Created by Google, the approach uses software to manage systems, automate tasks, and solve problems, combining development and infrastructure skills to maintain stable and reliable digital services.

Main objectives:

• Ensuring high availability: Keeping systems online and functioning as expected, even under high demand.
• Automating tasks: Replacing repetitive manual tasks with code, freeing up time for engineering activities.
• Managing risk: Balancing the risk between innovation and the need for a reliable system, using the concept of "error budget" to define acceptable downtime limits for maintenance and upgrades.
• Improving reliability: Working at technical and architectural levels to make systems more robust and resilient to failures.

Approaches and tools:

• Use of software as a tool: Automation is one of the cornerstones of SRE for managing and maintaining systems.
• Focus on metrics: Measuring reliability based on more sophisticated metrics than just uptime, such as the number of successful requests divided by the total number of interactions.
• Technological ecosystem: Container automation with technologies like Kubernetes is a common foundation for implementing SRE practices.

DevOps is the combination of culture, practices, and tools that automates and integrates processes between software development and IT operations teams. The goal is to improve collaboration and speed, delivering high-quality software faster and more reliably. This is done through empowering teams, automating workflows (such as continuous integration and delivery), and a cultural shift that unites development (Dev) and operations (Ops).

Componentes principais do DevOps:

• Culture: Promotes collaboration, communication, and trust among teams, breaking down barriers between development, operations, quality, and safety.
• Practices: Continuous Integration (CI): Integrates code from multiple developers into a common repository several times a day.
• Continuous Delivery (CD): Automates the delivery of applications to various environments, including production.
• Infrastructure as Code (IaC): Manages and provisions infrastructure through code, enabling automation and version control.
• Monitoring: Tracks the performance and behavior of applications in production to quickly identify problems.

• Tools: It uses tools such as Git for version control, containers (such as Docker and Kubernetes) for packaging applications, and various automation and orchestration tools to build CI/CD pipelines.

• Objective: To optimize software delivery, enabling companies to respond more quickly to customer needs, release new features more frequently, and have greater confidence in their systems.