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Portfolio/NETCONNECT_RESUME.md

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NetConnect Experience Summary (Mar 2024 - Present)

Position: System/Network Administrator & DevOps Engineer

Company: NetConnect Group
Period: Martie 2024 - Prezent (aprox. 22 luni)
Location: Remote

Major Projects & Achievements

1. PowerDNS High Availability Cluster (pdns, pdns2-6) 🎯

Timeline: Nov 2023 - Dec 2025 (ongoing)
Current Version: v2.4.0-stable → v2.5.0 (in development)

Architecture:

  • Master-Slave MySQL replication cluster
  • Keepalived VIP failover (automatic failback)
  • PowerDNS Authoritative servers (NS1: .214, NS2: .215)
  • Cloudflare API integration (20 zones, 581 records sync)
  • Custom CF-Sync v2.4.0 (Docker-based)

Key Achievements:

  • Designed and deployed production HA DNS infrastructure
  • Implemented automatic failover/failback mechanism
  • Created comprehensive automation scripts (Bash, Python)
  • Cloud-init deployment automation
  • Extreme load testing and optimization
  • Production endpoint: pdns.infra.netconnect.ro

Technologies: PowerDNS, MySQL/MariaDB, Keepalived, Docker, Bash, Python, Cloud-init, Ansible

2. InfraManager - Dynamic Infrastructure Management Tool

Timeline: Ongoing development
Purpose: Lightweight infrastructure orchestration

Features:

  • Dynamic service/node management via CLI
  • YAML-based state tracking
  • Template generation for configs
  • Future integrations: Ansible, Terraform, Proxmox API

Technologies: Python, YAML, CLI development

3. ncTesseract - Nextcloud OCR & Elasticsearch Indexing

Timeline: Dec 2024
Problem: Traditional Nextcloud indexing was extremely slow (350k files = 77 days!)

Solution:

  • Custom Python parallel indexer with 48+ workers
  • Tesseract OCR integration
  • Direct Elasticsearch indexing in Nextcloud-compatible format
  • Massive performance improvement (single-threaded PHP → multiprocessing)

Technologies: Python, Multiprocessing, Tesseract OCR, Elasticsearch, Nextcloud

4. Certificate Management Automation (certbotAuto)

Timeline: Sep 2024 - Dec 2024

Features:

  • Automated SSL/TLS certificate management
  • Multi-server deployment via Ansible
  • Let's Encrypt integration (certbot)
  • Centralized secrets management
  • Automated renewal and deployment

Technologies: Bash, Certbot, Ansible, YAML

5. CDR Processing System (cdr2sql)

Timeline: Feb 2024 - Jul 2025

Purpose: Call Detail Records processing and SQL integration

Components:

  • PHP backend for CDR parsing
  • Node.js/Gulp build system
  • Database integration for telecom billing

Technologies: PHP, Node.js, Gulp, MySQL

6. Xen to KVM/Proxmox Migration Tools (xen2lxc, xenserver_to_xen)

Timeline: Sep-Nov 2024

Purpose: Automated VM migration from legacy Xen infrastructure

Features:

  • XVA image extraction and conversion
  • Disk preparation for QEMU/KVM
  • Automated boot scripts
  • Proxmox integration

Technologies: Python, Bash, QEMU, Proxmox, Xen

7. Cataleya Integration (cataleya2db)

Timeline: Oct 2024

Purpose: Telecom data integration with Cataleya platform

Technologies: PHP, Database integration

8. Laravel Development Environment with SQL Anywhere

Timeline: Aug-Sep 2024

Purpose: Custom Docker-based development environment

Features:

  • Laravel + SQL Anywhere integration
  • Nginx + PHP-FPM stack
  • Docker Compose orchestration

Technologies: Docker, Laravel, PHP, Nginx, SQL Anywhere

9. Portability System - Czech Republic (portabilitateCehia.org)

Timeline: Ongoing maintenance

Purpose: Automated portability data download from Czech telecom portal

Challenges Solved:

  • SSL certificate renewal for client authentication
  • Wildcard certificate management (*.netconnect.ro)
  • HTTPS client certificate authentication

Technologies: OpenSSL, wget, SSL/TLS, Bash

10. Infrastructure Services

Timeline: Ongoing

Deployed/Maintained:

  • Zabbix Monitoring: Docker-based monitoring stack
  • FreeSWITCH: VoIP infrastructure (Docker)
  • Traefik: Reverse proxy and load balancer
  • Infrastructure automation: Various supporting services

Core Competencies Demonstrated

DevOps & Automation

  • CI/CD pipeline development
  • Infrastructure as Code (Ansible, Terraform concepts)
  • Docker containerization
  • Cloud-init automation
  • Custom automation tooling (Bash, Python, Perl)

System Administration

  • High Availability cluster design and deployment
  • MySQL/MariaDB replication and failover
  • DNS infrastructure (PowerDNS)
  • Load balancing (Keepalived)
  • SSL/TLS certificate management

Development

  • Python (multiprocessing, CLI tools, automation)
  • Bash scripting (complex automation)
  • PHP (backend services, integrations)
  • Perl (legacy support, migration)
  • JavaScript/Node.js (build systems)

Networking

  • DNS management and troubleshooting
  • VIP failover mechanisms
  • Firewall configuration
  • VPN integration concepts
  • Network troubleshooting (tcpdump, netstat, ss)

Virtualization & Cloud

  • Proxmox management
  • Xen → KVM migration
  • Docker (multi-service orchestration)
  • Cloud-init deployment
  • VM provisioning and management

Databases

  • MySQL Master-Slave replication
  • Elasticsearch integration
  • SQL Anywhere (legacy support)
  • Database optimization and monitoring

Key Technologies Used

Operating Systems: Debian, Ubuntu, CentOS, Alpine Linux
Scripting: Bash, Python, Perl, PHP
Orchestration: Docker, Docker Compose, Ansible (planned)
Databases: MySQL/MariaDB, PostgreSQL, Elasticsearch, SQL Anywhere
Web Stack: Nginx, Apache, PHP-FPM, Tomcat (limited)
Monitoring: Zabbix, Systemd journaling
Version Control: Git
Networking: PowerDNS, Keepalived, Cloudflare API, OpenSSL
Other: Tesseract OCR, FreeSWITCH, Traefik

Soft Skills Demonstrated

  • Problem Solving: Reduced Nextcloud indexing from 77 days to hours
  • Architecture Design: Built production HA DNS from scratch
  • Documentation: Comprehensive guides for all major projects
  • Automation Focus: Consistently automated manual processes
  • Tool Development: Created custom tools when needed (InfraManager, CF-Sync)
  • Migration Expertise: Successfully migrated legacy Xen infrastructure

For CV Update

Replace RnD Software Group entry (Apr 2021 - Present) with:

NetConnect Group | Bucharest, Romania (Remote)

SYSTEM/NETWORK ADMINISTRATOR & DEVOPS ENGINEER
Mar 2024 - Present

  • Designed and deployed production High Availability DNS infrastructure using PowerDNS, MySQL Master-Slave replication, and Keepalived VIP failover serving 20+ zones with automatic failover/failback
  • Developed custom automation tools including parallel OCR indexing system (48+ workers) reducing Nextcloud indexing time from 77 days to hours, and infrastructure management CLI tool (Python)
  • Automated SSL/TLS certificate management across multiple servers using certbot, Ansible, and custom bash orchestration
  • Migrated legacy Xen virtual infrastructure to Proxmox/KVM using custom Python/Bash tooling
  • Maintained and integrated telecom services including CDR processing, portability systems, and FreeSWITCH VoIP infrastructure
  • Technologies: PowerDNS, MySQL/MariaDB, Keepalived, Docker, Python, Bash, Ansible, Elasticsearch, Proxmox, Zabbix

Note: Această experiență arată o evoluție clară de la sysadmin tradițional (RnD) către DevOps modern cu focus pe automation, HA, și custom tooling development.