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Senior Security Engineer

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Senior Security Engineer in Remote new

  • Turkey

Responsibilities

  • Own default-deny east-west segmentation and identity-bound network policies across Kubernetes clusters.
  • Design and roll out mTLS-encrypted, identity-aware service-to-service connectivity.
  • Continuously map VPC peerings, tunnels, cross-account links, and public entry points using cloud APIs.
  • Enforce production and cardholder-data environment boundaries and conduct segmentation testing.
  • Evaluate and help deliver per-application Zero Trust Network Access for engineers and operators.
  • Own east-west and north-south flow telemetry and feed network data to the SIEM.
  • Manage admission controls, security groups, firewall rules, infrastructure-as-code, and automated drift remediation.
  • Build rapid containment capabilities and participate in network-related incident response, threat modeling, design reviews, and on-call.
  • Develop tooling, policy-generation workflows, flow analysis, and drift-review automation, including AI-assisted workflows.

Requirements

  • 6+ years of experience in security, network, platform, or infrastructure engineering with hands-on ownership of cloud production network controls.
  • Deep Kubernetes networking knowledge, including CNI, NetworkPolicy semantics, DNS, ingress, egress, and live-cluster segmentation rollouts.
  • Strong AWS networking experience with VPCs, subnets, security groups, peering, Transit Gateway, PrivateLink, load balancers, and flow logs.
  • Hands-on experience with mTLS and service-to-service authentication through service meshes, proxies, or CNI-level encryption.
  • Experience using Terraform and Helm or equivalents through merge requests and CI across repositories.
  • Ability to write production tooling and automation in Go, Python, or Bash.
  • Ability to investigate with packet captures, flow logs, and system-level data.
  • Working knowledge of PCI DSS network requirements, including segmentation, cardholder-data environment scoping, and segmentation testing.
  • Current practical use of AI tooling such as Claude Code, Codex, Cursor, or custom LLM integrations.
  • Preferred experience with Cilium, eBPF, Hubble, service meshes, SPIFFE/SPIRE, ZTNA, policy-as-code, admission control, network detection, incident containment, SOC 2, FFIEC-style examinations, and regulated fintech or payments environments.

Benefits

  • Full-time remote role.
  • Monthly gross compensation of $5,000-$9,500 USD based on experience.
  • Participation in an on-call rotation for owned controls.
  • Work with open-source technologies and AI-assisted engineering workflows.
  • Culture emphasizing high standards, ownership, innovation, speed, trust, and results.

Salary: DOE

Sezzle

Sezzle builds a buy now, pay later platform that lets consumers split purchases into interest-free installments online and in stores, integrated with e-commerce and retail merchants. The company earns revenue from merchant fees and related consumer charges and provides underwriting and payment pr...

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