Network Security Software Engineer

Lumin Digital is a trailblazer in digital banking solutions, driven by a unique approach to technology, service, and people. They are seeking a Network Security Software Engineer to build and enhance their network security program, ensuring the protection of sensitive financial data in a cloud-native environment.

Responsibilities:

• Own the architecture, implementation, and continuous improvement of Lumin’s network security program across cloud, SD-WAN, and ZTNA layers—designing identity-aware, policy-driven controls that secure both human and machine (agent) identities
• Design and deliver fully automated, end-to-end network security change management pipelines that eliminate manual toil, accelerate change velocity, and maintain audit-ready evidence at every step
• Build and operate real-time network telemetry, monitoring, and alerting systems that provide deep visibility into network activity — integrating threat intelligence feeds, cloud connectivity data, and asset inventories into a unified, automated network defense posture
• Engineer production-grade tooling and services—including firewall rule lifecycle management, policy drift detection, configuration compliance validation, and telemetry enrichment—using modern backend languages (Python strongly preferred) and infrastructure-as-code
• Manage and tune network-layer detection capabilities — including IDS/IPS signatures, firewall rules, and WAF configuration — to ensure high-fidelity signals for SOC consumption
• Operate at the leading edge of AI-assisted development: write precise engineering specifications, direct AI coding agents (e.g., Claude Code, Cursor), and review/validate generated output to build secure, lights-off agentic pipelines that the broader team can learn from
• Build and maintain API integrations across the network security technology stack (e.g., Cloudflare, Zscaler, cloud-native controls) with reliability, observability, and audit-readiness designed in from day one
• Support compliance audit and assessment activities — including evidence collection, control testing, and auditor walkthroughs for network security domains; maintain an accurate network diagram inventory documenting topology, segmentation boundaries, and data flows
• Partner with the Security Operations Center, SRE, and IT to ensure network security controls integrate cleanly with existing infrastructure pipelines, CI/CD workflows, and incident response processes; participate in security architecture reviews and contribute to runbook development and operational documentation—raising the network security bar across the engineering organization
• Perform other duties as assigned

Requirements:

• Bachelor's degree in Computer Science, Information Security, Network Engineering, or a related technical field, or equivalent combination of education and experience
• 5+ years of progressive experience in network security engineering, with a demonstrated track record of designing, automating, and operating network security controls in cloud-native or hybrid environments
• Substantive hands-on engineering experience: you write production code, build integrations, and ship tooling—not just policies and diagrams
• Direct experience with network security platforms such as Cloudflare (WAF, Workers, Rulesets, Terraform provider), Zscaler (ZIA, ZPA), Palo Alto, or equivalent tier-one solutions
• Deep expertise in network security fundamentals: firewall policy design, micro-segmentation, ZTNA, SD-WAN, DDoS mitigation, traffic analysis, DNS security, and certificate/PKI management
• Hands-on experience with agentic coding tools and workflows (Claude Code, Cursor, or equivalent)—or demonstrated eagerness and aptitude to adopt them as a primary development methodology
• Strong proficiency in at least one backend language (Python strongly preferred; Go or similar considered) with the ability to design and build production-grade APIs, automation frameworks, and integration platforms
• Thorough understanding of identity-aware network security—designing controls that authenticate and authorize not just users but services, workloads, and autonomous agents
• Demonstrated ability to write clear, precise engineering specifications and technical documentation; comfortable operating on a distributed, async-first team where written clarity drives outcomes
• Sound engineering judgment: able to evaluate AI-generated code for correctness, security implications, and maintainability; able to architect systems for reliability and observability
• Strong cross-functional communication skills: able to translate network security requirements into actionable engineering work and influence peers across Security, SRE, and Platform teams
• Preferred certifications: CCNP Security, PCNSE (Palo Alto), AWS Solutions Architect, Cloudflare certifications, or equivalent
• Experience in fintech, banking, payments, or other regulated financial services environments (PCI-DSS, SOC 2, ISO 27001) strongly preferred
• Experience building real-time telemetry, monitoring, and threat detection pipelines for network traffic
• Familiarity with agent-to-agent authentication, service mesh architectures, and securing AI/ML workload communications
• Experience integrating threat intelligence feeds and automating indicator-of-compromise enrichment into network defense workflows