Passionate about technology, I am an IT Operation Technician and Network Specialist with over 5 years of experience in network operations, troubleshooting, and technical support in global 24/7 environments. Skilled in SD-WAN, TCP/IP, DNS, DHCP, VLANs, Firewalls, and VPNs, I ensure the stability and performance of IT infrastructures across different regions.
I have hands-on experience with monitoring tools (Zabbix, Grafana, Graylog), ticketing systems such as Salesforce, Jira and BMC Remedy, and automation using Linux and Shell scripting. Additionally, I am certified in CompTIA Network+ and LPI Linux Essentials, and I continuously expand my knowledge in cloud and virtualization technologies such as AWS, Docker, and VMware.
Open to work :)
Experience: 6 years
Yearly salary: $20,000
Hourly rate: $20
Nationality: 🇧🇷 Brazil
Residency: 🇵🇹 Portugal
Experience
Freelancer
KGTECH 2023 - 2024
Frontend component development in React and TypeScript. UI/UX refactoring and improvements. Developed and maintained frontend components for enterprise web applications using React and TypeScript. Participated in code reviews, refactoring, and UI enhancements to improve performance and user experience.
AI Describe
Proof of Concept 2023 - 2023
Web app to summarize YouTube videos using OpenAI, Node.js, and SQL. AI to summarize YouTube videos in under 2 minutes. Built with TypeScript, OpenAI API, NodeJS, SQL and designed for rapid prototyping and UX. Project: https://ai-describe-videos.netlify.app/
Full Stack Notes
Proof of Concept 2023 - 2024
Notes application built with Node.js, SQL, and React. Focus on API integration, clean architecture, and responsive design. Project: https://walberttynotes.netlify.app
Operation Technician
Nokia 2020 - 2025
Provide global technical support for Nokia SD-WAN (Nuage) solutions, acting as interface between local teams, engineering and customers across multiple regions (Asia, US, Europe). Perform incident troubleshooting and resolution on complex networking issues (SDWAN/SD-DC, TCP/IP, DNS, DHCP, routing, and security policies). Monitor critical infrastructures using Zabbix, Grafana and Graylog, ensuring service availability and proactive detection of failures. Prepare and analyze Root Cause Analysis (RCA) reports, defining preventive measures to avoid recurrence of incidents. Conduct configuration validation and testing on Network Security Gateways (NSGs) to guarantee stability and compliance. Collaborate with TAC and R&D teams to reproduce sensitive issues, test product features, and support continuous improvement. Build and maintain lab/test environments to simulate customer designs and validate fixes or updates before deployment. Manage customer cases via Salesforce and BMC Remedy, ensuring clear communication and timely resolution. Support documentation efforts, including operational procedures, troubleshooting guidelines, and knowledge base updates. Work effectively under pressure in 24/7 global operations, quickly identifying, isolating and resolving outages and critical failures.
Customer Service Agent
Vodafone 2019 - 2020
Customer retention and acquisition. Support via CRM.
Digital Marketing
Indigo 2014 - 2018
Built online marketing campaigns and designed landing pages using WordPress. Created and executed a comprehensive digital marketing strategy. Proficient in tools such as Google Analytics, AdWords, and social networks. Specialized in SEO (Search Engine Optimization). Planned, executed, and measured ad campaigns. Excelled in programmatic media and digital project management.
Skills
aws
elasticsearch
firebase
grafana
javascript
kubernetes
linux
network-engineer
node
sql
customer-support
