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Senior Site Reliability Engineer (SRE)

Mirantis - Sofia, Sofia City Province, Bulgaria - In-office - posted 2026-09-29

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Mirantis is seeking a Senior Site Reliability Engineer to join its cloud development and operations team. You will contribute to designing, developing, and operating sophisticated cloud-based AI solutions built on the CNCF ecosystem, including Kubernetes, running on cutting-edge NVIDIA-certified hardware. This role focuses on deploying AI infrastructure, ensuring reliability, security, and performance of container infrastructure while mentoring team members and customers. Key responsibilities include: - Working with geographically distributed international teams on technical challenges and process improvements - Developing, implementing, maintaining, and troubleshooting cloud and AI infrastructure solutions based on open source software - Collaborating with stakeholders to gather and refine technical requirements - Optimizing system performance, reliability, and scalability - Troubleshooting, debugging, and resolving complex technical issues - Participating in code reviews to maintain high quality standards - Staying current with industry trends and best practices in cloud operations - Designing and implementing AI-driven automation across the DevOps lifecycle - Facilitating knowledge transfer to customers during delivery phases You will work with an established leader in cloud infrastructure, helping Fortune 500 and Global 2000 customers implement next-generation cloud technologies. The role offers professional development, conference attendance, and a competitive compensation package. Requirements: - 5+ years of professional experience in DevOps with strong focus on cloud and infrastructure technologies, including Kubernetes and/or OpenStack - Experience with high-performance data center processing, networking, and storage - Exposure to Golang and working knowledge of other programming languages (Python, JavaScript) - Strong knowledge of distributed systems, microservices architecture, and CI/CD pipelines - Exceptional problem-solving and debugging skills across networking, storage (hardware and software), Linux, and Kubernetes, with attention to performance optimization and security - Demonstrated ability to lead technical tasks and collaborate effectively with diverse teams - Comfortable making independent judgment calls when working directly with customers with limited day-to-day oversight - Excellent written and spoken English and customer-facing communication skills - Commitment to innovation, continuous learning, and delivering high-quality results - Ability to travel up to 25% if needed, including internationally - Bachelor's degree in Computer Science or related field, or equivalent experience Nice to have: - Extensive experience in network and/or storage architecture - Experience with high-performance computing or GPU infrastructure (GPU scheduling, MIG/vGPU, RDMA/RoCE, InfiniBand fabrics, NVLink, DCGM health-checking, GPU driver/firmware lifecycle, NVIDIA AI Enterprise) - Presence in open source community including upstream contributions and conference presentations - Prior experience with commercial container and virtual compute infrastructure platforms (Rancher, OpenShift, VMware)

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