DataPhone

DevOps Engineer

• Manage production Debian/Ubuntu Linux servers, including provisioning, configuration, upgrades, patching, hardening, and migrations
• Manage CPU, memory, storage, processes, services, networking, SSH, users, permissions, sudo, security, backups, and disaster recovery
• Troubleshoot production outages, performance problems, application crashes, memory leaks, and server/application interactions
• Deploy and maintain Node.js/TypeScript applications under PM2, including clusters, process management, deployments, rollbacks, monitoring, and logs
• Configure and maintain NGINX reverse proxies, SSL/TLS certificates, HTTP/HTTPS routing, load balancing, WebSocket proxying, security headers, access controls, and production traffic optimization
• Manage PostgreSQL servers, monitor health and performance, troubleshoot connections, perform backups/restores, understand indexes and basic query performance, and support replication/high availability
• Maintain and troubleshoot FreeSWITCH and OpenSIPS, including SIP registration, call routing, SIP/RTP traffic, NAT, RTP, codecs, packet loss, latency, scaling, and load balancing
• Manage Docker containers, networking, volumes, resources, and production services
• Maintain and improve infrastructure monitoring using Grafana, Prometheus, Loki, Netdata, and system/application/service logs
• Automate server-management, monitoring, deployment, maintenance, and troubleshooting tasks using Bash, Python and/or JavaScript/TypeScript, Ansible or similar tools, and Git
• Independently detect issues, investigate root causes, implement controlled fixes, verify results, and document solutions
• Work with developers to resolve production issues and establish standardized deployment procedures
• Continuously improve infrastructure reliability, security, scalability, and uptime

Linux Systems Administrator – DevOps Engineer