# Senior Mainstream Cloud Engineer at Mainstream > Hybrid · Bulgaria · Senior · DevOps / SRE / Infra · open. Source: https://alderhq.app/jobs/recruitee%3Amainstream%3A2700495 (read 2026-11-08). ## Facts (observed) - Company: [Mainstream](https://alderhq.app/companies/mainstream) - Location text: Sofia, Sofia, Bulgaria - Where it can be done from (inferred): Hybrid · Bulgaria (evidence: "Location: Sofia, Sofia, Bulgaria") - Posted: 2026-08-05 (95 days ago) - First seen by alder: 2026-11-07 · last verified: 2026-11-08 - Reposted: 0 times · edited: 0 times - Apply on the employer's site: https://careers.mainstream.eu/o/senior-mainstream-cloud-engineer - Skills listed (inferred): Python, PHP, PostgreSQL, MySQL, MongoDB, Redis, Kubernetes, Docker, Terraform ## Pay and sponsorship - Posted pay: not posted ## Description (the employer's text) ### 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 --- Data: alder (https://alderhq.app). Cite https://alderhq.app/jobs/recruitee%3Amainstream%3A2700495 and the date you read it. Observed facts come from the employer's own listing; location reach, level, family and skills are inferences.