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Salary
≈ $27k – $76k per year (Estimated)
Location
In office (Sofia)
Seniority
Senior · 7+ years exp

Confirmed on the employer's own hiring board on Oct 16, 2026. First seen by Alion on Aug 5, 2026.

Overview
Company
Impact
Profile match
Mainstream is a cloud operations company that combines cloud expertise with AI-powered automation to run private and public cloud environments for clients. It hires cloud engineers at levels one to three, operations center engineers, product engineers and sales managers for new client acquisition. The company is headquartered in Belgrade, Serbia.

Join Our AI-Powered Cloud Engineering Team

At Mainstream, we're building the next generation of cloud operations by combining deep cloud expertise with AI-powered automation and intelligent operations. We're looking for motivated Senior Cloud Engineers who are eager to thrive in an AI-powered cloud environment while working with modern cloud technologies and enterprise infrastructure.

As part of our Cloud Engineering team, you will support enterprise environments, monitor mission-critical systems, resolve operational incidents, and learn modern cloud technologies while helping our customers maintain secure, scalable and reliable cloud platforms.

What you'll do

  • Design, implement and optimize cloud infrastructure and platform architecture

  • Lead complex infrastructure projects and technical improvements

  • Provide L3 support by troubleshooting complex infrastructure incidents and performing root cause analysis

  • Drive automation using Infrastructure as Code and configuration management tools

  • Collaborate with engineering teams to improve reliability, scalability and operational efficiency

  • Define and promote DevOps, incident management and security best practices

  • Create and maintain technical architecture documentation, operational procedures and runbooks

  • Lead knowledge transfer sessions, mentor engineers and support technical growth across the team

  • Continuously drive cloud, automation and digital transformation initiatives

Requirements

  • 7+ years of experience in Cloud, Linux System Administration, Infrastructure or DevOps roles

  • Experience designing, implementing and supporting enterprise production environments

  • Experience leading technical initiatives and mentoring engineers

  • Strong analytical thinking and structured troubleshooting approach

  • Strong communication skills and a collaborative mindset

  • Fluent English

Experience with some, not all, of the following technologies is expected:

  • Operating Systems: Linux administration (RHEL, Ubuntu and similar), including network, system and application services

  • Networking: TCP/IP, DNS, troubleshooting

  • Infrastructure & Virtualization: VMware and/or Citrix XenServer, Infrastructure as Code (Terraform preferred), Configuration Management (Ansible)

  • Automation & Scripting: Bash and/or Python scripting, CI/CD fundamentals, Jenkins (nice to have)

  • Containers & Cloud Native: Docker, Kubernetes

  • Databases & Web Technologies: Apache, Nginx, PHP-FPM, MySQL / MariaDB / Percona, PostgreSQL, MongoDB, Redis, Memcached

  • High Availability & Monitoring: HAProxy, Keepalived, Nagios, Zabbix, Grafana, Prometheus

What we value

  • Technical leadership and ownership

  • Knowledge sharing and mentoring

  • Curiosity and continuous learning

  • Customer-focused approach

  • Passion for AI, automation and modern cloud technologies

Why join Mainstream?

  • Work alongside experienced engineers in enterprise infrastructure and virtualization

  • Gain hands-on experience with mission-critical environments and modern technologies

  • Grow in an AI-powered engineering organization where automation is part of everyday work

  • Access continuous learning, mentoring and professional development opportunities

  • Be part of a collaborative team that values curiosity, ownership and innovation

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