Oleksandr Vasylenko Email & Phone Number

Cupertino, Ca, Us

Santa Clara, Ca, Us

• Performed AI platform cloud integrations, leveraging Kubeflow and MLflow for efficient ML model development and deployment.• Automated ML operation workflows, boosting operational efficiency through Python automation scripts and robust CI/CD toolsets.• Enhanced system observability and monitoring through ELK and OpenTelemetry.

Santa Clara, Ca, Us

• Established Kubernetes CI/CD pipelines with ephemeral/on-demand environments, enhancing development speed by 40% and providing scalable infrastructure for intensive processing tasks.• Embedded SAST/DAST security practices within GitLab CI/CD workflows to meet stringent industry compliance standards.• Developed custom Kubernetes controllers to orchestrate scaling based on external metrics like Kafka topics, facilitating efficient Kubernetes onboarding.• Enhanced system observability and monitoring through OpenTelemetry, ELK, Prometheus and Grafana, providing real-time critical performance metrics.• Guided full-scale data center to cloud migrations with AWS ControlTower and Terraform, ensuring a reliable and seamless transition.• Upgraded infrastructure security and OS standards, creating golden images for consistent compliance and employing Terraform for IaC across multi-cluster Kubernetes environments.• Performed AWS expenses audit and implemented custom scripting for accounts cleanup and operational cost analysis.

• Managed on-premises and cloud-based Linux instances with Terraform, Ansible, and Packer, ensuring streamlined environment provisioning and configuration uniformity.• Developed and maintained a sophisticated Jenkins CI system, leveraging Workflow pipelines for enhanced flexibility and build process automation.• Orchestrated efficient data storage and retrieval solutions using AWS S3 and Ceph, aligning with organizational data management requirements.• Ensured compliance with HIPAA regulations to protect patient data integrity within healthcare software projects.• Directed software deployment and version control strategies, contributing to system stability and ensuring seamless component integration.• Designed object storage lifecycle policies based on tagging and time criteria to optimize data retention and archival procedures.

Newtown, Pa, Us

• Administered on-prem and cloud CI Linux server infrastructure with a focus on automation using Terraform, Ansible and Packer to enhance efficiency which led to 30% shorter build time• Established and managed a Continuous Integration (CI) infrastructure using Jenkins CI to streamline code deployment.• Managed multiple MySQL clusters and supported the team with RDBMS schema lifecycle management, including ETL tasks.• Maintained the SonarQube QA testing platform, ensuring consistent code quality checks and system reliability.• Facilitated the onboarding of new team members, expediting their integration into the development processes.• Served as a key technical contact for multiple teams, advising on component integration and infrastructure issues to support productive collaboration.

• Developed and managed Linux system configuration automation using Ansible and Chef, enhancing system reliability and deployment efficiency.• Administered the full lifecycle and versioning of Application API endpoints, ensuring seamless service evolution.• Oversaw live service upgrades and the seamless deployment of new services, minimizing downtime and user disruption.• Managed MongoDB clusters with over 10 shards, achieving optimal load distribution and database performance.• Automated service integration processes by leveraging the DigitalOcean API, improving load balancing capabilities.• Conducted load testing and Proof of Concept (PoC) activities to validate system performance under various conditions.• Executed billing verification by querying accounting databases to ensure transactional accuracy and financial integrity.• Enhanced network throughput by fine-tuning the TCP stack and optimizing VPN configurations, including OpenVPN and L2TP.

Москва, Ru

• Provided consultancy and ongoing 2nd and 3rd level support for several enterprise and ISP customers, addressing complex infrastructure issues and ensuring operational stability.• Participated in infrastructure planning, including cost estimation and equipment selection, to meet customer needs and budget requirements.• Assisted in the implementation of Carrier-Grade NAT (CGNAT) for a major telecom operator using Juniper equipment, enhancing network scalability and IP address management.• Contributed to the company’s certification process to meet vendor partnership compliance requirements.

Kyiv , Kyiv, Ua

• Participated in deployment of a nationwide IP/MPLS network for government services, comprising 76 Label Switch Routers (LSR) and over 500 points of presence (PoPs), enhancing connectivity and operational efficiency across the country. Automated configuration preparation to achieve 30% faster equipment provisioning while mitigating human error.• Led the implementation of a secure IP core network for the Euro-2012 football championship, ensuring seamless and reliable connectivity at multiple venues through coordination with a leading national ISP.• Executed network upgrade for an ISP’s corporate infrastructure using Juniper NetScreen firewalls, significantly improving business continuity and ensuring enhanced security compliance.Configured Layer 3 VPN (L3VPN) solutions for a UMTS/3G ISP, enabling efficient metro Ethernet connections between cellular base stations (Node B) and radio network controllers (RNC).• Designed and deployed a high-availability infrastructure for Ukraine's largest bank, transitioning from Cisco PIX to multiple failover clusters of Cisco ASA firewalls to ensure continuous, uninterrupted operations.• Seamlessly migrated thousands of points of presence to the new network infrastructure, decommissioning the legacy setup without disrupting service or causing downtime.

Prague, Praha 9 - Letnany, Cz

• Participated in network infrastructure upgrade for a major financial institution in partnership with Cisco Systems, enhancing scalability and performance.• Maintained and supported the ATM and processing center network infrastructure, ensuring high availability and secure transactions.• Rolled out and administered CiscoWorks LAN Management Solution (LMS) to streamline network operations, improve asset management, and automate device configuration.• Provisioned and managed dynamic routing protocols (OSPF, RIP, EIGRP) for multihomed facilities, ensuring optimized routing and network redundancy.• Enforced IPsec suite implementation across 100% of points of presence (PoPs), adhering to PCI DSS compliance requirements and enhancing the overall security of the network.• Managed customer support and network troubleshooting for one of the largest national banking infrastructures, ensuring prompt resolution of network issues and minimizing downtime.

• Administered and optimized Linux-based web hosting platforms, deploying OS and configuring services to meet performance and security requirements.• Tweaked and compiled custom Linux kernels for the entire fleet of web hosting machines, ensuring kernels were optimized for performance, and applied patches in line with the latest CVE advisories to maintain security.• Managed customer support and troubleshooting for *nix services, resolving issues to ensure continuous service availability.• Performed seamless, live migrations of bare-metal web hosting servers between regions, maintaining uninterrupted web and mail traffic.• Contributed to scaling bare-metal infrastructure to handle periods of high demand, ensuring reliability and availability during peak loads.

Kiev, Ua

• Administered Linux and BSD based gateways (pf and iptables), mail server, and firewall, ensuring secure and stable network operations. Including asymmetric satellite links based on SkyStar2 cards (with kernel tweaking for proper TCP congestion control)• Implemented, and maintained a Windows Server 2003 domain infrastructure to enhance educational processes in information security laboratories.• Reduced maintenance overhead by 50% by deploying automatic PXE boot recovery mechanisms, streamlining the support process and allowing for seamless mass backup and restoration for entire campus,• Implemented a centralized corporate-level antivirus solution to enhance security across the network.• Administered Cisco Systems academy lab at campus providing full setup for the CCNA course.