Senior Security Engineer – Network & Zero Trust

🔥 1 hour ago

🇦🇷 Argentina – Remote

💵 $5k - $9.5k / month

⏰ Full Time

🟠 Senior

🛜 Network Engineer / Network Administrator

👻 Ghost score 21%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Sezzle

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2016

💳 Fintech

👥 B2C

🛍️ eCommerce

Fintech • B2C • eCommerce

Sezzle is a financial technology company that offers a "buy now, pay later" service, allowing consumers to purchase products and pay for them in four interest-free installments over six weeks. The Sezzle app provides users with a flexible financing alternative to traditional credit cards, enabling instant approval decisions without impacting credit scores. Sezzle partners with various top brands, including Amazon, Walmart, and Target, to offer in-app and in-store payment options. The company's mission is to empower consumers financially by providing more financial freedom and control. It is available as a mobile app, with millions of downloads and high user ratings, and works towards accessibility and inclusion on its platform.

📋 Description

• Own east-west segmentation across Kubernetes clusters and maintain default-deny, identity-bound network paths • Design and roll out mutually authenticated, encrypted service-to-service connections using mTLS • Maintain a continuously reconciled map of VPC peerings, tunnels, cross-account links, and public entry points • Own segmentation of production and the cardholder-data environment, including CDE and high-trust-tier boundaries • Partner with IT to evaluate and deliver per-application private access/ZTNA • Own network telemetry and feed east-west and north-south flow logs to the SIEM • Own cluster admission control, infrastructure-as-code network controls, and automated drift detection and remediation • Build containment capabilities and participate in incident response involving network controls • Participate in threat modeling, design reviews, and the on-call rotation • Write policies, tooling, and rollout automation; report to the Director of Information Security and collaborate with security platform, detection and response, platform, IAM, and other engineering teams • Use and build AI-assisted agentic workflows for flow analysis, policy generation, and drift review

🎯 Requirements

• 6+ years of experience in security, network, platform, or infrastructure engineering, with hands-on ownership of network controls in cloud production environments • Deep practical Kubernetes networking knowledge: CNI, NetworkPolicy semantics, DNS, ingress/egress, and experience rolling segmentation out on live clusters without outages • Strong AWS networking: VPCs, subnets, security groups, peering and Transit Gateway, PrivateLink, load balancers, and flow logs • Hands-on experience with mTLS and service-to-service authentication • Infrastructure as code using Terraform and Helm or equivalents, through merge requests and CI • Ability to write code in Go, Python, or Bash for tooling and automation • Ability to investigate with packet captures, flow logs, and system-level data • Working knowledge of PCI DSS network requirements • Demonstrated AI-forward engineering using AI tooling such as Claude Code, Codex, Cursor, or custom LLM integrations • Preferred: Cilium/eBPF, Hubble or equivalent flow observability, fleet-scale mTLS, certificate lifecycle, SPIFFE/SPIRE, AI-assisted workflows, ZTNA, policy-as-code, admission control, network detection, IDS/IPS, SOC 2, FFIEC-style examination expectations, and regulated-environment experience

🏖️ Benefits

• Competitive gross salary of $5,000–$9,500 USD per month, based on experience level • Culture including musicians, yogis, cyclists, chefs, golfers, dog-lovers, and rock-climbers • Remote work arrangement