Senior DevOps / Integration Engineer

Square One Resources is hiring a Senior Linux Engineer to maintain, develop, and secure Linux environments. The role involves working on server and endpoint infrastructure, network solutions, security, and supporting R&D teams.

• Hands-on experience with Kubernetes, including Helm, Operators, CRDs, and containerized workloads.
• Experience managing and optimizing MQTT brokers in high-availability environments.
• Knowledge of industrial OT systems and protocols, including OPC UA, Modbus, and Profinet.
• Understanding of GxP/CSV validation processes and ALCOA+ data integrity principles.
• Experience with DevOps and GitOps practices, including Infrastructure as Code (IaC), ArgoCD, or Flux.
• Knowledge of security best practices, including TLS/mTLS, Kubernetes RBAC, and MQTT topic access control.
• Experience with observability and monitoring tools such as Prometheus, Grafana, and Loki.

• Deploy, operate, and optimize highly available MQTT platforms on Kubernetes using Helm, Operators, and IaC.
• Configure Kubernetes networking, storage, and MQTT broker performance for reliable industrial workloads.
• Integrate SCADA, MES, Historians, PLCs, and industrial protocols (OPC UA, Modbus, Profinet, EtherNet/IP) with MQTT.
• Design secure IT/OT data flows following Purdue Model and ISA-95 principles.
• Support GxP-compliant infrastructure, including CSV, ALCOA+, and audit-ready GitOps deployments.
• Build and maintain secure CI/CD pipelines with GitHub and ArgoCD/Flux.
• Implement TLS/mTLS, certificate management, Kubernetes RBAC, and MQTT topic access controls.
• Monitor platform health with Prometheus, Grafana, and Loki, and configure proactive alerting.
• Troubleshoot incidents, perform root cause analysis, and support deviation and CAPA investigations.
• Collaborate with IT, OT, Engineering, and Quality teams to deliver secure, scalable, and compliant platform solutions.