Infrastructure architect

We are looking for a Principal Infrastructure who can command, design, and operate a globally distributed production environment across the US, UK, and AU regions. This role is for an architect-level engineer who still loves to get their hands dirty — the kind of person who can both lead a SRE/Dev Ops team and SSH into a production node to trace issues.About the RoleThis role involves end-to-end control of our multi-region infrastructure (AWS + on-prem hybrid) spanning compute, Vo IP, databases, monitoring, and automation.Responsibilities- Reliability and uptime for mission-critical communication systems handling millions of SIP sessions and HTTP requests daily.- Management and mentorship of Dev Ops/SRE and Support Engineers, ensuring process maturity and on-call readiness.- Responsibility for performance, scalability, and security across all environments.- Decision authority on infrastructure architecture, cost optimization, and modernization initiatives.Qualifications- 10+ years in Infrastructure / Dev Ops / SRE roles- Proven expertise running production-grade, multi-region environments in AWS.- Deep understanding of networking, SIP signaling, NAT traversal, RTP, and media relay.- Proficiency in Debian/Linux internals, kernel tuning, and packet tracing.- Hands-on experience with WAF, Mod Security, fail2ban, iptables, and system hardening.- Solid background in Ansible, AWX, Python (2.7/3.x), and Bash scripting.- Experience managing Grafana Loki, Prometheus, and alerting frameworks.- Familiarity with Docker / Docker Compose / Terraform for repeatable infra.- Prior leadership experience — leading cross-functional infrastructure teams in 24x7 environments.Required Skills- Architect, operate, and continuously improve AWS environments (EC2, EKS, RDS, Route 53, VPCs, IAM, S3, LAMDA, Cloudfront).- Maintain multi-layer high-availability Vo IP servers.- Design and enforce multi-region DR and failover policies with automated recovery.- Manage clusters for Maria DB, Mongo DB, Redis, and Rabbit MQ.- Own and optimize Kamailio, Asterisk, RTPProxy, and RTPEngine stacks — ensuring consistent SIP routing, NAT traversal, and call resilience across regions.- Build SIP-level observability: tracing dialogs, RTP flows, and registrations through Grafana, Loki, and sngrep pipelines.- Lead continuous performance and load testing with SIPp and Playwright-based automation frameworks.- Enforce multi-layer security using Mod Security, fail2ban, IPTables, and real-time log-based intrusion prevention.- Build proactive defenses against SIP scanning, brute-force attacks, and zero-day threats.- Maintain end-to-end TLS, cert rotation, and infrastructure audit trails.- Drive compliance with regional (US/UK/AU) data protection requirements.- Manage a large-scale Grafana + Loki + Prometheus monitoring.- Correlate Vo IP, network, and application metrics for unified visibility.- Build actionable alerts and dashboards for call traffic, system health, and anomaly detection.- Implement distributed tracing and incident replay for debugging call failures.- Maintain full configuration automation via Ansible + AWX with disaster recovery playbooks.- Build self-healing routines for proxy or service recovery via scripts and cron jobs.- Design CI/CD pipelines for infrastructure code, ensuring rapid, controlled deployments.- Implement chaos testing and resilience benchmarking to proactively harden infrastructure.- Lead a Dev Ops and Support Engineering team, setting standards for incident response, documentation, and reliability.- Conduct performance reviews and mentor team members on debugging, SIP analysis, and cloud automation.- Establish a culture of observability and ownership — no “restart and pray” mentality.- Work directly with development teams (Laravel, Node.js, React) to ensure application-level readiness for scale.Preferred Skills- Experience with cloud-native technologies and microservices architecture.- Familiarity with Agile methodologies and Dev Ops practices.