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Infrastructure / Cloud / Automation Tel Aviv, Israel

Oren Zisman.

Senior DevOps Engineer

also Zaharia

Building reliable systems.
Making complex infrastructure feel simple.

Hands-on engineer working at the intersection of Kubernetes, cloud infrastructure, and networking. From telecom systems to multi-region platforms, I turn operational complexity into dependable, automated workflows.

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20+

Staging & development EKS clusters

3

Multi-region production environments

~30%

Cloud spend reduction

Selected impact
at Guesty
01

Experience

Guesty

Current

Senior DevOps Engineer

– Present

DevOps Engineer

–

  • Lead Kubernetes architecture across 3 multi-region production environments and 20+ staging and development AWS EKS clusters.
  • Standardized GitOps deployments with ArgoCD, establishing a single source of truth. Maintain and extend Jenkins pipelines for cross-team workflows.
  • Built custom Spot instance-store solutions with RAID0 through Karpenter, reducing cloud spend by ~30% and accelerating cluster boot times.
  • Developed an internal Python CLI to simplify cluster management across 20+ staging and production environments and reduce daily operational overhead.
  • Architected and evaluated Istio Ambient Mesh adoption across multi-cluster EKS, separating L4/L7 processing to optimize resources and eliminate sidecar memory overhead.
  • Kubernetes
  • AWS EKS
  • ArgoCD
  • Karpenter
  • Python
  • Istio

Aperio

DevOps Lead

–

DevOps Engineer

–

  • Managed AWS and Azure infrastructure with Terraform, supporting high availability and consistent infrastructure governance.
  • Implemented Karpenter and Vertical Pod Autoscaler to improve cluster scaling and resource efficiency.
  • Architected and maintained GitLab CI pipelines using Python and Bash.
  • Introduced Windows nodes in Amazon EKS to support legacy application migration and Windows container builds.
  • Terraform
  • AWS & Azure
  • GitLab CI
  • Karpenter

Parallel Wireless

System Architect

–

  • Led the architectural migration of telecom Baseband Unit workloads to Kubernetes, integrating SR-IOV and DPDK for high-performance, low-latency networking.
  • Designed feature specifications and led Linux, cloud-native networking, and infrastructure orchestration strategies.

System Integration Engineer

–

  • Built zero-touch provisioning solutions with DHCP, DNS, SSL, RHEL Kickstart, iPXE, Docker, Flask, Python, Bash, and Nginx.
  • Owned team DevOps work and partnered with the architecture team on proofs of concept.
  • Researched 4G/LTE REVoLTE vulnerabilities and developed proofs of concept for mitigation.
  • Linux
  • SR-IOV / DPDK
  • Python & Bash
  • Telecom

Ben-Gurion University

Research & Teaching Assistant

–

IDF

Electronics Practical Engineer & Programmer

2012 – 2016

Developed a C# control system using UDP/TCP and FFT, working with hardware protocols including UART and SPI.

02

Research & Patents

03

Selected Projects

BSc final project / Grade 100

Wireless Imaging & Positioning for WSN Open project

Researched and developed an automated 3D radar system based on WiFi frequencies, using MATLAB, Python (NumPy/SciPy), and NI USRP software-defined radio.

Hardware & embedded systems / Grade 100

Automatic Receiver Test Equipment

Engineered a custom PCB with audio filtering and an AVR32 microcontroller. Developed C drivers for touch-screen interfaces, SPI, UART, and DSP signal processing.