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mainstream

Senior Mainstream Cloud Engineer

Sofia, Sofia, Bulgaria
Level
Senior
Work type
Hybrid · Sofia

Not stated in the posting: salary, visa.

Open. First seen 3 October 2026.

About the role

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.

mainstream's standard text

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
  • 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

What this role asks for

Standard for DevOps / SRE / cloud roles

CI/CD · Docker · Kubernetes · Python · Terraform

Common in DevOps / SRE / cloud postings at any company.

In most of mainstream's ads

Linux

Named in most of its open postings, whatever the role.

91% of this description is written for the role. The rest is mainstream's standard text, folded away below.

Read against mainstream's other open postings on this site.

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