DevOps Engineer

Maintained and upgraded AWS infrastructure and tools for an attack research and response tool;

Implemented and improved CI/CD pipelines for code checks, container image builds, deployments, and E2E tests;

Set up and managed self-hosted GitHub runners to optimize CI/CD performance;

Used the Nix configuration language to package software for purpose-specific VMs;

Led biannual upgrades of the VM infrastructure (running NixOS) to the latest OS version;

Implemented CI checks and Terraform pre-commit hooks to ensure code integrity and security;

Set up OIDC authentication between GitHub Enterprise (GHE) and AWS across all pipelines;

Collected evidence for SOC-2 audit to ensure compliance and security standards;

Implemented image scanning and vulnerability reduction in ECR registries;

Created and improved Prometheus monitoring alerts, including implementing promtool unit tests.

Provided sysadmin/DevOps support for a FinTech B2B platform serving major European banks;

Wrote and debugged GitHub Actions workflows to automate processes and enhance CI/CD pipelines;

Set up and maintained dynamic AWS GitHub runners using Terraform, implementing on-demand EC2 instances as self-hosted runners;

Developed and modified Ansible roles for configuration management across the infrastructure;

Managed Infrastructure as Code (IaC) using Terraform for the platform's CDN (AWS CloudFront);

Administered multiple Jenkins instances with pipelines for various tasks, including crawlers, backups, CI checks, and deployments;

Developed Bash and Python scripts to integrate and automate custom internal functionality;

Wrote and maintained a custom Flask Python app for internal management, including creating Kubernetes manifest templates;

Troubleshot RabbitMQ queues to ensure optimal message delivery and performance;

Made modifications to custom Kubernetes Python operators to improve functionality;

Assisted developers in properly containerizing applications for deployment.

Contributed to an internal infrastructure-monitoring team by developing custom tools, scripts, and REST API microservices (Django, Flask) for automation and integration;

Integrated monitoring tools (Prometheus, Zabbix, Pingdom) with PagerDuty, Jira, and Grafana to enhance system visibility and alertin;

Deployed microservices in clustered Docker projects, managing deployment pipelines with Ansible and Jenkins;

Configured and fine-tuned Prometheus alerts and Nginx reverse proxies to optimize performance;

Wrote microservices for various use cases, including: Detailed per-minute status reporting of P0 incidents from PagerDuty to Mattermost for improved accountability;

Automated Jira ticket creation based on specific alert thresholds and frequencies;

Created and updated internal troubleshooting documentation automatically;

Built a custom REST API for aggregating BitBucket stats for Prometheus alert configuration;

Automated email notifications for data center maintenance and incident updates;

Integrated filtered PagerDuty alert data with Grafana dashboards for enhanced monitoring and visualization.

Administered a Java-based Call Center platform, ensuring stability and optimal performance;

Performed upgrades and fine-tuned client environments according to internal processes;

Monitored system and application statistics to identify and resolve performance issues;

Conducted performance and benchmark testing on software releases using custom scripts for call and email simulations;

Generated detailed reports for clients based on test results and performance metrics;

Developed automation and monitoring scripts using Bash, Groovy, and Python;

Worked with RHEL/CentOS, Grafana, MySQL, Apache Tomcat, and related technologies.

Administered NetBackup, an enterprise backup software, ensuring system reliability and performance;

Maintained, upgraded, and configured backup appliances on Windows and Linux/UNIX systems;

Analyzed and troubleshot software-specific, OS, networking, and configuration issues;

Reproduced bugs and issues in a hybrid cloud lab environment for debugging and resolution;

Provided technical support for French-speaking customers;

Worked with RHEL/CentOS, Windows Server 2016, Bash, PowerShell, SAN/NAS, and Hyper-V.

Administered a high-performance data storage software, ensuring stability and efficiency;

Monitored, upgraded, and tested production and pre-production clusters;

Performed troubleshooting, new client installations, configurations, and fine-tuning of bare-metal servers;

Developed automation scripts in Bash to streamline operations;

Managed virtualization and infrastructure using CentOS/Debian, KVM, IPMI, libvirt, VMware ESXi, and vCenter/vSphere;

Configured and maintained RAID/LVM storage solutions for optimal performance;

Implemented monitoring and alerting with Nagios to ensure system reliability.

Provided technical support for Proofpoint Protection Server, an enterprise email security software;

Assisted English and French-speaking clients with troubleshooting and issue resolution;

Supported both hosted and on-premises server environments, ensuring optimal performance and security;

Diagnosed and resolved issues related to email filtering, SMTP, DNS, MySQL, SSL/TLS, and Active Directory;

Managed server configurations, security settings, and system updates to maintain reliability;

Worked with virtualization technologies to optimize server deployments and performance;

Collaborated with internal teams and clients to enhance email security and prevent cyber threats.