Rokon

SYSTEM ADMINISTRATOR

PST • Tiempo completo

Oct 2022 - Present • 4 yrs

• Manage Linux infrastructure across Development, QA, and Production environments, supporting business-critical applications and development teams. • Automate infrastructure provisioning, configuration, and deployments using Ansible, Semaphore, Jenkins, GitLab CI/CD, and NetBox. • Design and operate Kubernetes, Docker, Docker Compose, and Proxmox environments for production and internal platforms. • Build and maintain AI/LLM infrastructure and agentic workflows using OpenRouter, OpenCode, Hermes, Manifest, Hindsight, MCP, and LLM APIs. • Integrate AI tooling with enterprise infrastructure, including APIs, authentication, networking, containers, and reverse proxies. • Administer OPNsense firewalls, VPNs, routing, NAT, DNS, and network security. • VMware Virtualization (vSphere, ESXi, vCenter) • Design and maintain HAProxy and Caddy reverse-proxy infrastructure, including ACL-based routing, TLS, DNS, and backend management. • Manage PostgreSQL, Redis, Keycloak, Apache NiFi/NiFi Registry, Nextcloud, pywb, Browsertrix, and related infrastructure platforms. • Execute infrastructure migrations involving Linux, PostgreSQL, Docker, storage systems, and large-scale data synchronization. • Implement infrastructure security, secrets management, and operational standards using OpenBao/Teampass, SSH, TLS, Git, and automated validation. • IT Training

DevOps Engineer

Intersky • Freelance

Feb 2022 - Present • 4 yrs 8 mos

Managed highly available Linux gateway clusters using Heartbeat/Pacemaker, including HA DHCP, LDAP, FTP, and NFS services. Administered Mail, DNS, Proxy, Web, FTP, LDAP, Samba, and Git infrastructure. Automated infrastructure operations using Ansible and Bash scripting. Managed DRBD, GlusterFS, Proxmox, Apache, Nginx, Tomcat, OpenSSL, MySQL/MariaDB, MS-SQL, and Windows Server environments. Managed AWS EC2, S3, VPC, EBS, Glacier, and ELB services. Administered Active Directory, DHCP, DNS, FTP, PXE, file sharing, and Windows policies. Prepared Mock, UAT, DC/DR production environments and deployed applications and microservices using Docker and Kubernetes. Built and maintained Jenkins CI/CD pipelines and private/central Docker registries. Performed infrastructure troubleshooting, incident resolution, monitoring, and technical documentation.

SENIOR DEVOPS ENGINEER

GIGA TECH Limited • Tiempo completo

Oct 2020 - Oct 2022 • 2 yrs

• Architected scalable and self-healing Kubernetes platforms and automated deployment of solutions across 15+ banking applications. • Built and maintained CI/CD pipelines using Jenkins and Ansible, enabling continuous integration, delivery, and zero- downtime releases. • Containerized microservice architectures using Docker and Kubernetes. • Implemented observability using ELK/EFK, Prometheus, and Grafana to support production SLA and KPI requirements. • Administered AWS-managed Kubernetes clusters and core services, including EC2, VPC, S3, EBS, IAM, and Route 53. • Administered Linux/Unix servers, MySQL, PostgreSQL, and Git-based repositories including GitHub.• Collaborated with engineering, networking, and infrastructure teams to deliver full-lifecycle infrastructure and automation improvements