Wagner Ribeiro
Senior Infrastructure Automation Engineer (Linux & Ansible) @Citi
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WORK HISTORY
Senior Infrastructure Automation Engineer (Linux & Ansible) @Citi
Dublin, IE
As a Senior Infrastructure Automation Engineer at Citi, I contributed to the development of a scalable orchestration platform that automated provisioning and configuration management for Ansible, Terraform, and APIs. I contributed to the architecture and development of Python-based microservices, secured workflows with HashiCorp Vault KV secrets and SSHKS certificates, and optimized performance across the platform. I partnered with Linux teams to onboard infrastructure components, accelerating automation adoption.Created Ansible automations for provisioning hybrid cloud infrastructure, networking, and middleware components, collaborating closely with Linux teams to integrate these automations into the orchestration platform.Implemented HashiCorp Vault secret engine integration for secure, dynamic credential management across automation workflows.Rolled out SSH certificate-based authentication via Vault, eliminating static SSH keys and aligning with enterprise security requirements.Managed and deployed Helm-based OpenShift services, ensuring consistency in configuration and seamless updates with rollback support.Delivered critical performance improvements through profiling and optimization of orchestration tasks, resulting in faster execution and reduced failure rates.Developed and exposed internal REST APIs for orchestration workflows, enabling easy integration with internal tools and automation platforms.Partnered with Linux operations and service teams to integrate their workflows and automations into our orchestration tool, enabling automated service deployments, configuration management, and troubleshooting, which significantly reduced manual effort.Played a key role in architectural decisions, setting coding standards and automation guidelines used across multiple teams.Developed and maintained CI/CD pipelines using Harness, improving deployment speed and visibility for orchestrated services across OpenShift clusters.
EDUCATION
FIAP
Tecnologia em Redes de Computadores, Tecnologia da Informação
Atlantic Technological University
Postgraduate Diploma, Computing in DevOps
SKILLS
ABOUT WAGNER RIBEIRO
I\'m an IT professional with over 10 years of solid experience working with Linux systems, infrastructure, and automation. I hold a Postgraduate Diploma in DevOps and have built my career around designing and maintaining reliable, scalable, and secure infrastructure environments.I\'ve worked extensively with Linux systems, virtualization (KVM, VMware, LXD), and cloud platforms like AWS and IBM Cloud. I have strong experience managing essential infrastructure services such as storage, networking, VPNs, firewalls, and identity and access management using LDAP, Kerberos, and DNS. Security and system hardening are always a key part of my approach.I\'m highly proficient in Ansible and Terraform, which I use extensively for infrastructure-as-code and automation — from provisioning systems to managing configuration at scale. I also work with GitHub Actions, GitLab CI, Jenkins, and Lightspeed to build efficient and reliable CI/CD pipelines.I’m proficient in Bash and Python, which I use daily to automate tasks, streamline operations, and develop custom tooling. On the container and orchestration side, I work with Kubernetes, OpenShift, Docker and Helm to deploy and manage scalable, containerized applications. Monitoring, logging, and observability are part of my routine using Prometheus, Grafana, and the ELK Stack.Whether it’s building secure, automated environments or bridging the gap between development and operations, I’m passionate about infrastructure that performs and scales. I\'m especially interested in roles like Linux Administrator, DevOps Engineer, Site Reliability Engineer (SRE), or Cloud Engineer, where I can contribute to production-grade systems and keep growing technically.
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