About NUACOMFounded in 2009, NUACOM is Ireland's leading B2B Cloud Business Phone System provider.We build innovative, reliable communication tools that help businesses connect — seamlessly and globally.As we grow, we're looking for ambitious people who want to innovate, lead, and shape the future of business communications.The OpportunityWe're hiring a Principal Systems Engineer with deep expertise in high-availability infrastructure and VoIP systems.This is a senior leadership role with a clear path toward Chief Technology Officer (CTO).You'll own technical strategy, guide system architecture, and lead a small, high-performing engineering team — working closely with the CEO, Product, and Support teams.What You'll DoDesign and maintain Linux infrastructure (Colocation + AWS)Lead incident response and business continuity planningImprove CI/CD pipelines and automated deploymentsOversee monitoring, performance, and reliabilityAct as Level 3 escalation for complex issuesManage and mentor a team of system engineersSet and enforce security and reliability standardsWhat You Bring10+ years in senior systems or SRE rolesProven experience with high-availability systemsStrong Linux/Unix administration skillsMySQL/MariaDB (replication & scaling)Advanced networking (BGP, VLANs, iptables/nftables)VoIP expertise (SIP, RTP, WebRTC; Asterisk/FreeSwitch/Kamailio)AWS or public cloud experienceAutomation tools (Ansible, Puppet)Monitoring stacks (ELK, Prometheus, Grafana)Message queues (RabbitMQ, NATS, etc.)Scripting: Bash + one other (Go, PHP)Virtualization & containers (VMware, Proxmox, Docker)Strong security mindset and communication skillsThe Impact You'll MakeShape NUACOM's infrastructure and growth roadmapImprove deployment speed, reliability, and scalabilityChampion DevSecOps and modern engineering practicesMentor and grow a culture of ownership and excellenceWhat We OfferCompetitive salary + performance bonusesPrivate medical insuranceCompany equipment & relocation supportFlexible hours with hybrid/remote optionsJob Types: Full-time, PermanentPay: €68,161.62-€124,607.79 per yearBenefits:Additional leaveBike to work schemeCompany eventsCompany pensionOn-site parkingPrivate medical insuranceSick payWork from homeWork Location: Hybrid remote in CO. Kildare, CO. Kildare