Squaretalk is a global cloud communications platform helping businesses connect with their customers through flexible, scalable, and secure technology. Behind our intuitive SaaS products lies a complex and high-availability infrastructure that enables reliable communication across continents.

We’re looking for a DevOps Engineer who thrives in a dynamic environment and enjoys working with a wide range of technologies-from infrastructure automation to VoIP systems. You’ll be an essential part of the team that keeps Squaretalk running 24/7.

Role Summary

As a DevOps Engineer, you’ll be responsible for managing, monitoring, and maintaining our production systems, ensuring uptime, performance, and stability. You’ll collaborate closely with engineering, QA, and support teams to deploy changes, monitor system health, and proactively prevent outages.

You should bring a solid understanding of server administration, automation tools, and networking fundamentals, along with a hands-on attitude and ability to stay calm under pressure.

Key Responsibilities

• Monitor systems, services, and networks; respond to alerts and resolve incidents promptly
• Maintain, troubleshoot, and optimize Linux-based production servers
• Handle VoIP and SIP infrastructure, including Asterisk, FreePBX, FreeSWITCH, and Kamailio
• Manage and scale cloud services on AWS and DigitalOcean
• Configure, deploy, and manage containerized applications using Docker
• Automate routine operational tasks and infrastructure provisioning
• Maintain and optimize MySQL and Redis databases; manage backup and recovery procedures
• Collaborate with developers on application deployments and CI/CD pipelines
• Participate in an on-call rotation
• Ensure system security hardening and timely updates
• Document configurations, procedures, and incident responses
  
  

Nice to Have

• Experience with Nginx and/or Apache web servers
• Terraform and infrastructure-as-code experience
• Kubernetes knowledge
• Experience in performance tuning for high-traffic environments
• Knowledge of SIP tracing, VoIP logs analysis, and network QoS
• Experience with VoIP/SIP systems (Asterisk, FreePBX, FreeSWITCH, Kamailio)
• Familiarity with security hardening and compliance basics
• Comfortable with Agile/Scrum environments
  
  

Requirements

• 3+ years in a DevOps, SysAdmin, or NOC role
• Strong Linux system administration skills
• Solid networking knowledge (TCP/IP, DNS, firewalls, routing, network troubleshooting)
• Hands-on experience with AWS and/or DigitalOcean
• Strong experience with Docker in production environments
• Familiarity with monitoring tools such as Zabbix
• Experience with MySQL, Redis, and backup strategies
• Good understanding of PHP-based applications and basic debugging
• Experience with Bash and PHP scripting
• Working knowledge of CI/CD pipelines (Jenkins, GitLab CI, or similar)
  
  

Benefits

• Work in a modern infrastructure environment that supports real-time communication.
• Join a fast-paced, international team with a strong engineering culture.
• Be part of a mission-critical team powering a platform used by companies worldwide.
• Opportunities to learn and grow in cloud, security, and automation fields.
• Competitive salary and hybrid work flexibility in our Sofia/Jerusalem office.