Senior Mainstream Cloud Engineer
At a glance
Senior Cloud role at Mainstream. Sofia · full-time.
Pay not stated Cloud Engineer salary
devopsroles summary, based on the employer's posting.
What you'll do
- Design cloud platforms and infrastructure, then improve their architecture and performance
- Take on difficult infrastructure incidents at L3, investigate causes and restore service
- Lead infrastructure projects, technical improvements and automation built with code and configuration tools
- Work with engineering teams on reliability, scalability and operational efficiency
- Set technical practices, document systems and procedures, and mentor engineers through knowledge sharing
What you bring
- At least seven years in cloud, Linux administration, infrastructure or DevOps work
- You have designed and supported production environments at enterprise scale
- You have led technical work and mentored other engineers
- Fluent English, with a structured approach to diagnosing complex problems
Who this fits
This senior role suits an engineer who can lead technical initiatives, handle complex production issues and help colleagues grow. The position is hybrid in Sofia, Bulgaria.
From the employer
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
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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