Freelancer profile translated to English.

Description

Computer engineer with +3 years of experience in system administration, automation, and VoIP telephony. I have worked with Linux and Windows Server environments, Active Directory management, TCP/IP networking.

I help SMEs and startups optimize their IT infrastructure: from automating repetitive tasks with Python and Bash, to implementing and supporting VoIP systems, through remote administration of servers and PostgreSQL databases.

If you are looking for a reliable technical professional who solves real problems without detours, you are in the right place.

Industry field of expertise

Languages

Spanish
Native or bilingual
English
Fluent
Catalan
Native or bilingual

Workplace preferences

Can work on-site

Valencia (up to 50km)

Inetum
IT Project Coordinator
CONSULTING AND AUDITS
December 2025 - March 2026 (3 months)
Valencia, Spain
▸ Coordination of technical teams with task and incident tracking in Jira and Microsoft Teams.
▸ Automation of processes and generation of metrics through scripts in PowerShell and Python.
▸ Administration of Windows Server environments (SCCM/SCOM), Active Directory, and asset inventory.
Windows Server Active Directory Microsoft Excel Jira Python
DialApplet
VoIP Telephony and Network Monitoring Technician
TELECOMMUNICATIONS
November 2023 - July 2025 (1 year and 8 months)
Valencia, Spain
▸ Real-time monitoring of VoIP Quality of Service: alarm detection and KPI analysis.
▸ Network incident analysis with Wireshark, VoIPMonitor, and sngrep on TCP/IP, SIP, and RTP protocols.
▸ Linux server administration: SSH, VPN, iptables, user and permission management.
▸ Scripting in Python and Bash for automation of operational processes and repetitive tasks.
▸ Comprehensive management of the ticket lifecycle in Jira: opening, tracking, escalation, and client closing.
▸ Application of AES/RSA cryptography, PKI, and SSL in secure communications.
▸ Administration of PostgreSQL databases and support for Windows Server environments (SCCM/SCOM, Active Directory).
Python Linux Monitoring VoIP Network Administration
ACERNET SL
Full Stack Web Developer
February 2023 - May 2023 (3 months)
Valencia, Spain
▸ Backend development with Node.js

▸ Design and implementation of REST APIs for integration between services.
Back-End Development Front-End Development Web Design

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Degree in Computer Engineering
Polytechnic University of Valencia (UPV)
2024
Grado en Ingeniería Informática
Degree in Telecommunications Engineering
University of Valencia (UV)
2018
Grado en Ingeniería de Telecomunicaciones

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Alejandro Duque Segura

Sysadmin & IT Consultant | Linux · Windows Server

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