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CoreStar is hiring DevOps Engineer

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**Core Responsibilities:**

* Design and evolve infrastructure as code (Terraform/Ansible/Kubernetes/Flux) to deliver repeatable, scalable environments.
* Build and maintain reliable CI/CD pipelines (GitLab CI/Flux) with safe deployments and rollbacks.
* Operate and harden Kubernetes/container platforms (upgrades, HA, NetworkPolicies, secrets, observability).
* Implement monitoring, logging, and tracing (Prometheus/Grafana, Coralogix), define SLO/SLI, and drive incident response.
* Enforce security and compliance: IAM and least-privilege access, secret management, OS/hardening, audits.
* Optimize performance and cost: troubleshoot network/storage/CPU bottlenecks, capacity planning, DR/backup strategy, FinOps.
* Partner with engineering teams: review infra changes, champion best practices, and automate repetitive workflows.

**Required Qualifications:**

* 5+ years of experience as a DevOps Engineer.
* Strong Linux administration (systemd, shell, filesystems, performance, security).
* Deep networking knowledge: TCP/IP, DNS, HTTP(S), TLS, VPNs, load balancing, proxies/ingress.
* Cloud platforms (AWS, GCP, or Azure): VPC/networking, IAM, compute, storage.
* Containerization & orchestration: Docker, Kubernetes (deployment, scaling, Flux/Helm/Kustomize).
* Infrastructure as Code: Terraform (preferred); config management with Ansible/Puppet.
* CI/CD: design and maintain pipelines (GitLabCI, ArgoCD etc.).
* Observability & incident response: Prometheus/Grafana, ELK/EFK, tracing; on-call/IR practices.
* Scripting: Bash plus one of Python or Go for automation.
* SRE practices: reliability, SLO/SLI, capacity planning, disaster recovery/backups, cost/perf optimization.
* Git-based workflows and release management; strong problem-solving and team mindset.

**Preferred Qualifications:**

* Hands-on AWS (VPC/IAM, EKS, ALB/NLB, WAF, Route 53, S3) in production.
* Service mesh expertise (Istio) and advanced K8s networking (CNI, NetworkPolicies, ingress/egress hardening).
* Expertise in networking troubleshooting & performance tuning (eBPF; L3–L7 bottlenecks).
* Kafka administration (cluster sizing, partitions/replication, ACLs, monitoring, tuning).
* ClickHouse operations (replication/sharding, HA, backup/restore, query/performance tuning).
* MongoDB operations (replica sets, sharding, backup/restore, indexing & perf tuning).
* MySQL operations (HA/replication, backups, schema/query optimization).
* Kubernetes from scratch & bare-metal ops (bootstrapping, etcd care, CNI/CSI, HA control plane, upgrades).

**Benefits:**

* 24 working days of paid annual leave
* 6 days of paid sick leave
* Official employment
* Medical insurance
* Coffee zone with fruit & snacks available in the office
* Corporate Lunch provided by the company
* Gym and sports classes
* Healthy and friendly work atmosphere

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