Experience

Swirlds Labs

• Technology, Information and Internet
• 1 - 100 Employee

• Sr. DevOps Engineer

  • Dec 2022 - Present



AbEx Capital

• London, England, United Kingdom - Remote Client

• DevOps Engineer

  • Jan 2022 - Oct 2022

  • Created and designed the infrastructure from scratch in accordance with the company's future product design and roadmap. • Set up a fresh Kubernetes cluster on top of GKE and secured all publicly exposed deployments using NGINX Ingress Controller and TLS-enabled ingresses, and by utilizing GCP's VPC Firewall. • Created, maintained, and built Kubernetes manifests and Docker images for a wide variety of proprietary tools and services utilizing both Deployment and StatefulSet kinds. • Deployed and maintained a 3-node HashiCorp's Vault cluster in Kubernetes and injected secrets into various deployments via the Agent Sidecar Injector. • Monitored both applications and infrastructure using Prometheus and Grafana. • Created and maintained state persistence for applications using GCP's Persistent-Disk and GCS buckets. • Created and maintained multiple CI/CD pipelines from scratch using GitHub Actions. • Set up and maintained Ethereum blockchain nodes (both Mainnet and Goerli testnet). Show less



Flinks

• Canada
• Financial Services
• 100 - 200 Employee

• DevOps Specialist

  • Sep 2020 - Jan 2022

  • Maintained, supported, optimized, and upgraded Flinks' R&D and production infrastructure that resides in multiple cloud services (AWS, GCP, and Azure) and serves hundreds of clients in a multi-tenant environment. • Maintained and upgraded Kubernetes clusters on top of GKE. • Maintained, supported, and updated multiple CI/CD pipelines using Octopus Server and Azure DevOps. • Controlled and updated system configuration using SaltStack. • Maintained and supported cloud SQL server for the production and development environments: Azure MSSQL and GCP PostgreSQL. • Led a migration from a homegrown Redis based solution to Redis Enterprise cloud solution across all production and development environments. • Supported and debugged AWS SageMaker and Serverless. • Maintained monitoring and alerting of the entire system using Prometheus, Grafana, and Nagios via Splunk. Show less



Leanfra - High Performance Computing

• Canada

• CTO and Co-Founder

  • Dec 2018 - Jul 2020

  • Designed, implemented, optimized and maintained Leanfra's AI/ML training environment infrastructure. • Implemented Canonical's MAAS for GPU node rapid deployment. • Implemented Excelero's NVMesh high-performance, low-latency software-defined storage solution. • Implemented Mellanox EDR 100Gbps Infiniband Network. • Supervised development of web-based applications for deployment, control and monitoring of GPU nodes. • Supervised development of Leanfra's ML benchmark tasks by software vendors. • Executed benchmarks and created performance and price comparisons against competitor environments. Show less



ClusterOne

• San Jose, California, United States - Remote Client

• DevOps Engineer

  • Oct 2017 - Jul 2018

  • Assisted in the development, operation and upgrades of a complex clustered system to execute distributed AI ML/DL jobs across potentially hundreds of worker nodes. • Maintained and further developed the Docker and Kubernetes clusters that contained the CPU and GPU worker nodes for the ML/DL training. • Maintained and further developed utility Python-based scripts. • Maintained system support tools such as AWS Autoscaler, Redis, ElasticSearch and Consul. • Upgraded and improved the system deployment process and overall performance with tools such as: Packer, Terraform and Chef. • Implemented support for the system to allow deployments on GCE. • Modernized the worker nodes' Docker container by rebuilding it from scratch using newer versions of Ubuntu. • Implemented a monitoring and alerting system using Telegraf, Prometheus and Grafana for visualization of the data. • Provided client support with new system deployments and troubleshooting issues in their systems. Show less



Dell EMC ScaleIO

• Software Development
• 1 - 100 Employee

• Tier 3 Escalation Engineer

  • Aug 2015 - Aug 2017

  • Provided customer support for highly complex technical issues with the company's product, primarily on Linux, VMware ESXi, Citrix XenServer 6.5, OpenStack block storage components and Windows Server environments. • Liaised between the company's R&D department and the customer-facing tier two support engineers allowing for smoother exchange of information and quicker solutions for software-level issues. • Managed tickets' progress and status using JIRA. • Contributed articles to the company's Confluence knowledge-base once solutions have been found for issues. • Created and passed training sessions and presentations to my team mates on relevant topics I encountered such as OpenStack and Citrix Xen usage and troubleshooting in regard to the company's product. Show less



Check Point Software Technologies Ltd

• United States
• Computer and Network Security
• 700 & Above Employee

• Linux & VMware System Administrator

  • Jan 2014 - Aug 2015

  • Managed two VMware vCenters that contained about 9,500 virtual machines and used roughly 600 physical servers as hosts. • Supported, maintained and upgraded firmware for several different server brands: HP, Dell and IBM. • Installed and supported various operating systems: RHEL, CentOS, Ubuntu, several different versions of Windows Server and VMware ESXi. • Administrated several storage systems, both NAS, SAN and iSCSI: NetAPP, Dell Compellent, Kaminario K2 flash-only storage, Dell PowerVault, Nexenta and OpenFiler. • Collaborated closely with the company's DevOps teams, written automation and utility scripts for them. • Undertook a large project in collaboration with DevOps teams to significantly upgrade the performance of the in-house compilation farms with a huge successful increase of almost 4 times the compilation speed. Show less



Polycom

• United States
• Telecommunications
• 700 & Above Employee

• Linux & VMWare System Administrator

  • Nov 2012 - Dec 2013

  • Managed two VMware vCenters that managed about 650 virtual developer CentOS Linux workstations and 50 Windows Server utility systems. • Maintained and supported two HP BladeCenters that contained 30 ESXi hosts. • Provided support to all aspects of the IT environment: Linux OS, VMware infrastructure, NetAPP Storage, applications and more. • Maintained and upgraded a RedHat Kickstart rapid VM deployment system that was used by hundreds of developers to deploy their CentOS virtual workstations whenever they needed to and upgraded/add new deployment images as required. • Led and implemented a big upgrade to the NetAPP storage system, both in terms of capacity addition and storage heads upgrade. This storage system held all of Polycom's Israel R&D branch codebase and was also used as the datastore for all of the VMs' disks. Once upgraded, the system contained ~70TB of capacity that was used both for NFS and CIFS mounts. Show less



Centerity Systems

• United States
• Software Development
• 1 - 100 Employee

• Integrator & Developer

  • Nov 2011 - Sep 2012

  • Implemented and supported Centerity's monitoring system for numerous of the company's customers. • Developed new monitoring plug-ins for the system using Perl and MySQL. • Configured customers' monitoring systems to function in several different modes: Agent/Agentless, SNMP and Nagios. • Implemented and supported Centerity's monitoring system for numerous of the company's customers. • Developed new monitoring plug-ins for the system using Perl and MySQL. • Configured customers' monitoring systems to function in several different modes: Agent/Agentless, SNMP and Nagios.



G.S.R Computing Solutions

• Israel

• IT Professional

  • May 2010 - Oct 2011

  • Acted as a Linux and open-source consultant and focal point. • Provided technical support to customers with any subject related to their IT environment. • Assisted customers to plan and design systems acquisitions. • Written shell scripts for automation of processes. • Migrated and adjusted hundreds of shell scripts for single customer that was moving from AIX to RHEL. • Monitored the ongoing health of customers’ Linux, VMware ESX/ESXi and Windows environments. • Acted as a Linux and open-source consultant and focal point. • Provided technical support to customers with any subject related to their IT environment. • Assisted customers to plan and design systems acquisitions. • Written shell scripts for automation of processes. • Migrated and adjusted hundreds of shell scripts for single customer that was moving from AIX to RHEL. • Monitored the ongoing health of customers’ Linux, VMware ESX/ESXi and Windows environments.



Cybonet Security

• Israel
• Computer and Network Security
• 1 - 100 Employee

• Integrator & Senior Support Engineer

  • 2005 - 2010

  • Provided end-to-end support and services to the company's customers, starting at pre-sale meetings and ending with post-sale support and training. • Handled higher complexity issues that the support engineers escalated to me. • Liaised between the customers and the company's R&D and QA departments to allow for quicker solutions by better understanding the issues. • Implemented and integrated customer systems on-site and provided initial training. • Utilized the following technologies in order to accomplish my tasks: Linux OS, SMTP, DNS, HTTP/S, DHCP, LDAP, POP3, IMAP, TCP/IP & Networking, Mail-Relays, Web-Filters (Proxy & Bridge/Gateway based), Checkpoint / FortiGate / Juniper firewalls, basic Active-Directory, Exchange and VMWare Server/Workstation. Show less