Stefan Bullones

Built the observability stack (Grafana, Loki, Mimir) from scratch and introduced SLI-based monitoring to define reliability targets for incident triage. Developed Go services and CLI tooling to automate PaaS provisioning on GCP/Kubernetes, hardened GKE with gVisor, migrated the vector store to Cloud SQL Postgres with pgvector, and implemented DevSecOps pipelines with automated AI-assisted code review.

Built and operated Kubernetes-based platform infrastructure using Helm, ArgoCD, and Gateway API, with Terraform-managed IaC and GitHub Actions CI/CD. Developed services in Go and Python and supported vector search using Qdrant and pgvector, alongside Prometheus/Grafana monitoring on GCP.

Led SRE work supporting Kubernetes deployments with ArgoCD and Argo Rollouts, backed by Terraform/Terragrunt and automated via GitHub Actions. Improved operational observability with Prometheus and Grafana and managed AWS data services, including RDS and Aurora Global Databases.

Embedded SRE across 3 teams supporting business-critical SMS messaging on Kubernetes and Aurora Global Databases with high availability and low latency across 6 AWS regions. Introduced Argo Rollouts for progressive deployments, led zero-downtime major-version MySQL migrations on Aurora Global across 6 regions, and defined SLI-based monitoring and internal SLAs.

Delivered DevOps consulting focused on Kubernetes platforms, including EKS, Helm, and containerized deployments. Implemented IaC with Terraform/Terragrunt and automated CI/CD with Bitbucket Pipelines.

Consulted for an ad-tech client on AWS EKS, delivering Terraform + Terragrunt infrastructure and extending Karpenter autoscaling to provision cost-efficient ARM/Graviton nodes. Deployed a Kubernetes-based Bitbucket runner autoscaler to improve CI/CD scaling.

Built and maintained AWS-focused container and serverless infrastructure, leveraging ECS, Lambda, and managed workflows via Step Functions. Managed infrastructure with Terraform/Terragrunt, supported CI/CD with GitHub Actions, and developed automation using Python and Node.js.

Owned infrastructure, cloud, and CI/CD as the sole DevOps in a seed-stage startup, translating the product roadmap into infrastructure delivery. Containerized services on AWS ECS with Terraform/Terragrunt, deployed a BERT-based ML service on SageMaker after a pivot, and built a fully serverless, state-machine-driven service using Step Functions, API Gateway, and Lambda.

Consulted for OpenShift, Ansible, and AWS on a long-term banking engagement, automating OpenShift cluster deployments using Terraform and Ansible. Delivered additional customer rotations including new-cluster validation (hardening, backups, load testing) and best-practice guidance for adopting Ansible and Kubernetes.

Consulted on Kubernetes and container platform deployments, including OpenShift components managed with Terraform Enterprise. Automated delivery with Jenkins and ArgoCD, supported AWS infrastructure (EC2/RDS/S3), and performed systems administration using Ansible and Python.

Provided DevOps leadership and cloud operations across AWS and monitoring/alerting workflows, using EC2, RDS, S3 and Jenkins CI/CD. Managed Linux services with nginx and Tomcat, implemented monitoring with Prometheus/Grafana, and supported automation with Ansible and Java.

Led automation and monitoring for new services after a reorg, bridging developers and operations across the company. Built the monitoring stack with Prometheus, Grafana, and Netdata, and automated server provisioning and configuration with Ansible using repeatable, version-controlled workflows.

Implemented CI/CD pipelines using Jenkins and supported enterprise systems administration on Linux. Managed application infrastructure including Apache, nginx, Wildfly, and VMware, with automation via Ansible and ongoing platform operations.

Ran CI/CD and Linux systems administration for production deployments, using Jenkins and Ansible to manage Tomcat/JBoss application servers. Supported build, deployment, and ongoing server operations within a Scrum product team.

Administered Linux-based infrastructure including Apache, Tomcat, and GitLab, and supported VMware environments. Managed monitoring with Nagios, handled network components like VPNs and firewalls, and contributed with scripting/development in Java and Python using automation via Ansible.

Maintained and monitored client services on delegated managed services infrastructure by administering Linux servers, virtualization, and monitoring tooling. Used VMware, Nagios, and Ansible (with Python and Java support) to keep production operations stable and observable.

Earned Red Hat RHCSA, RHCE, and Certified Specialist in Containers and Kubernetes (Certificate ID 200-079-630) in 2021.

Master in Computer Vision at Universidad Rey Juan Carlos (Sep 2014–Jun 2016). Final project focused on pedestrian detection with a CNN using TensorFlow and OpenCV.

Bachelor in Electronics Engineering at UNEXPO Venezuela (Sep 2008–Jun 2014). Final project involved implementing a fingerprint image filter for a fingerprint recognition system.