Portfolio · 2025
Pajazit Selishta
IT Infrastructure · Networking · Tier 3 Technical Support Engineer
IT Specialist and Network Administrator with 20+ years of experience across ISP operations, NOC environments, and full-scope IT management. Known for owning end-to-end infrastructure — networks, servers, VoIP, and automation — and for turning complex incidents into permanent fixes.
What I Do
Networking & Infrastructure
Design, deploy, and maintain network infrastructure using MikroTik, UniFi, Ruijie, and GrandStream — covering routing, switching, Wi-Fi, VPN tunnels, dual-WAN failover, and firewall configuration across office and production environments.
Systems Administration
Administer Windows and Linux environments end-to-end — servers, workstations, access control, patch management, backups, and hardware lifecycle including procurement, RMA coordination, and vendor management.
Monitoring & Incident Response
Build multi-layer monitoring pipelines using MikroTik Netwatch, Zabbix, and Node-RED with real-time Telegram alerts. Investigate incidents through syslog analysis and device behavior tracing — delivering permanent root-cause fixes, not workarounds.
Automation & Scripting
Write Python, Bash, and PowerShell scripts to automate infrastructure tasks, parse syslogs, and trigger alerts. Orchestrate workflows with Node-RED to reduce manual intervention and speed up incident response.
VoIP & Communications
Deploy and manage VoIP platforms — 3CX, Grandstream, and Asterisk — across multi-site environments. Handle SIP trunk configuration, dial plan setup, extension management, number porting, and PBX maintenance.
Web & eCommerce
Build and deploy websites and online stores on WordPress, WooCommerce, Shopify, and OpenCart — covering theme setup, product catalogue, payment gateway integration, and ongoing maintenance.
Developer Tools & AI
Work daily with Claude Code, OpenAI Codex, Docker, and VS Code to build, automate, and deploy projects — combining AI-assisted development with containerised workflows.
Skills
Resume
Key Achievements
- Built multi-layer network monitoring using MikroTik Netwatch, Node-RED, and Python — with real-time Telegram alerts triggering the moment a device or link goes down.
- Deployed and managed VoIP platforms (3CX, Grandstream, Asterisk) with multiple SIP trunks at Intercom Ventures and BitByBit, handling dial plans, extensions, and trunk registration end-to-end.
- Designed dual-WAN load balancing and 4G LTE failover across GrandStream, UniFi, Ruijie, and MikroTik — including VPN tunnels, device backups, and full technical documentation.
- Reduced recurring incidents by delivering permanent root-cause fixes through deep syslog analysis and device behavior investigation across NOC and production environments.
- Developed and deployed LunarSense (WiFi CSI occupancy & vitals monitor) and LunarClick (HR management platform) as production-ready products.
- Delivered eCommerce and web deployments across WordPress / WooCommerce, Shopify, and OpenCart for business clients.
- Served as escalation point for complex incidents spanning multiple ISPs, third-party vendors, and cross-team environments.
Professional Experience
IT Specialist & Network Administrator
AlbaQeramika — Prishtina, Kosova
- Own end-to-end IT infrastructure across office and production facility — networking (MikroTik, UniFi), servers, workstations, VoIP, and user support.
- Administer Windows and Linux systems including access control, patch management, backups, and enterprise tooling.
- Configure and maintain VPN tunnels, dual-WAN failover, switching, routing, and wireless networks.
- Built automated monitoring and real-time alerting pipelines using Node-RED and Telegram for instant incident notification.
- Manage full hardware lifecycle — procurement, vendor coordination, RMA procedures, and scheduled maintenance.
IT Specialist & Network Administrator · NOC / Monitoring Engineer
BitByBit sh.p.k — Prishtina, Kosova
- Operated the NOC: monitored client networks, triaged alerts, and escalated complex issues to engineering.
- Deployed and managed VoIP infrastructure — 3CX, Grandstream, and Asterisk — including SIP trunk setup, dial plan configuration, and extension management.
- Diagnosed and resolved complex issues spanning routing, switching, and customer-edge equipment through deep syslog and log analysis.
- Conducted root-cause investigations for recurring incidents and implemented permanent fixes to reduce repeat escalations.
- Coordinated with ISPs and third-party vendors to restore service and manage fault resolution.
Monitoring Engineer · Team Leader (NOC)
Intercom Ventures LLC — Kosova
- Led a NOC shift team monitoring large-scale infrastructure 24/7 across multiple client environments.
- Deployed and maintained VoIP systems including SIP trunks and PBX configuration for client deployments.
- Owned escalation workflows, on-call rotations, and inter-team coordination; mentored junior monitoring staff.
- Improved alert quality and reduced false positives by refining monitoring thresholds and alert rules.
IT & Networking
PC Comp sh.p.k — Kosova
- Deployed and maintained client networks, structured cabling, and customer-edge devices across multiple sites.
- Assembled and configured desktop and server hardware; resolved on-site and remote support tickets.
- Coordinated hardware RMAs and vendor replacements to minimize client downtime.
Networker
KosovaNet — Kosova
- Built and operated wireless and wired ISP networks across Kosovo during a formative era for regional connectivity.
- Provisioned customer broadband links, troubleshot last-mile and backbone issues, and supported field installations.
- Maintained network equipment and managed customer connections across multiple access points.
Languages
Albanian (Native)
English (Fluent)
Serbo-Croatian (Fluent)
Projects
A selection of infrastructure, automation, and operational projects I have worked on in production environments.
Network Monitoring System
Built a multi-layer infrastructure monitoring and alerting system. Used MikroTik Netwatch for on-device WAN link health checks and Node-RED to orchestrate real-time automated notifications via Telegram the moment a device or link goes down. Complemented this with a Python script that continuously parses syslog messages from network devices and triggers targeted alerts when specific failure patterns or abnormal behavior are detected.
MonitoringMikroTik NetwatchNode-REDTelegramPythonSyslogAutomationReal-Time Alerts
Infrastructure Incident Investigation & RCA
Led root-cause investigations for complex infrastructure incidents across NOC and production environments. Analyzed syslog output, device behavior, and monitoring data to trace failures to their origin — spanning routing issues, link flaps, hardware faults, and misconfigured services. Delivered permanent fixes rather than workarounds, reducing recurring incidents and improving overall network stability across managed sites.
RCASyslog AnalysisNOCIncident ResponsePermanent FixesNetwork Stability
System Assembly & Server Maintenance
Assembled and configured desktop systems while performing maintenance and troubleshooting on server hardware. Diagnosed hardware failures, replaced faulty components, and ensured stable system operation across workstations and servers.
HardwareServersComputers
Dual-WAN Load Balancing & 4G Failover
Designed and deployed dual-WAN load balancing and 4G LTE failover solutions across multiple vendors — GrandStream, UniFi, Ruijie, and MikroTik. Configured failover rules and load balancing policies to maintain service continuity during ISP outages. Set up VPN tunnels across all platforms for secure remote access and site-to-site connectivity. Produced full device backups and technical documentation for every deployment.
MikroTikUniFiGrandStreamRuijieDual-WAN4G FailoverVPNDocumentation
VoIP Provider Service
Deployed and managed VoIP infrastructure across multiple organizations, including Intercom Ventures LLC and BitByBit sh.p.k. Configured and maintained multiple SIP trunks and a range of PBX platforms — 3CX, Grandstream, and Asterisk — tailored to each environment's scale and requirements. Handled end-to-end setup including dial plan configuration, extension management, trunk registration, and ongoing troubleshooting.
VoIPSIP3CXGrandstreamAsteriskPBX
RMA Coordination & Hardware Lifecycle
Managed the return and replacement process for faulty hardware through vendor RMA procedures. Coordinated with suppliers to diagnose hardware failures, process replacements, and track device lifecycle to ensure minimal operational disruption.
RMA CoordinatorWarranty
LunarSense — WiFi Occupancy & Vitals Monitor
Deployed a non-camera monitoring system that uses WiFi Channel State Information (CSI) to detect occupancy and measure vital signs — breathing rate (±1 br/min) and heart rate (±2 BPM) — through up to 3 solid walls. Sensor runs on ESP32 over 2.4 GHz WiFi with real-time 2-second data updates. Cloud portal secured with TLS in transit and AES-256 at rest. GDPR-compliant by design — no video, no biometric data captured.
WiFi CSIESP32IoTCloudAES-256GDPR
LunarClick — HR Management Platform
Built and deployed a centralized HR platform covering the full employee lifecycle — camera-based clock-in/out with photo proof, a three-tier payroll engine aligned to labor law, leave management with approval workflows, and full audit logging with automatic backups. Supports four role levels (Worker, Manager, Admin, SuperAdmin) with enforced permissions and no manual configuration. Deployable within one business day.
HR PlatformPayrollAttendanceRole-Based AccessAudit Logging
Website & eCommerce Development
Built and deployed multiple websites and eCommerce stores across various platforms — WordPress, WooCommerce, Shopify, and OpenCart. Handled full setup including theme customization, product catalogue configuration, payment gateway integration, and performance optimization. Live deployments include vashe.shop and hapudoor.com.
WordPressWooCommerceShopifyOpenCarteCommerce