Lead/Senior Security System Engineer - Network Cloud

EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

We are seeking a Lead/Senior Security System Engineer to design, implement, and operate secure, compliant network segmentation between regional environments and Global networks, using a standardised control stack of Check Point Security Gateways, Palo Alto Networks next-generation firewalls, Zscaler Internet Access (ZIA), Zscaler Private Access (ZPA), and Cloudflare for DDoS mitigation, WAF, and application protection. This role blends architecture, hands-on engineering, automation, and L3/L4 operational leadership to deliver policy-driven connectivity under strict regulatory and operational requirements.

Responsibilities

• Define trust zones, routing boundaries, and inter-zone controls for regional and Global Network, covering north-south and east-west paths, micro-segmentation for sensitive tiers, and explicit cross-border allow-lists
• Produce HLD/LLD, threat models, and control mappings aligned to internal standards and regional regulation to enable secure communication
• Design and operate dual-vendor firewall perimeters, with clear control allocation, HA/cluster design, deterministic failover, NAT domain strategy, and SSL/TLS inspection governance tuned for jurisdiction
• Engineer ZIA for identity-aware egress controls, SSL inspection with jurisdiction-aware bypasses, inline CASB/DLP, and sanctioned SaaS governance
• Implement ZPA for per-application zero-trust access, with connector placement, posture checks, conditional access, and app segmentation replacing legacy VPN where feasible
• Design and deliver Site-to-Site VPN, Cloud Interconnect/Partner Interconnect equivalents, and dual-tunnel HA per site with BGP for failover between on-prem and hub VPC
• Deploy Cloudflare Magic Transit/Magic WAN, WAF Management, and rate limiting for internet-facing services, with layered defence integration with on-prem perimeters
• Engineer SD-WAN/MPLS/SASE paths with policy-based routing, strong encryption, and defined key custody/rotation by jurisdiction
• Translate regulatory and internal control requirements into enforceable technical controls for logging, data residency, TLS inspection scope, and lawful intercept considerations
• Normalise telemetry from security platforms into SIEM with regional data handling rules, and build detections for cross-border anomalies, DDoS events, and policy drift
• Lead L3/L4 incidents, coordinate issue containment, and drive RCAs with corrective actions codified
• Manage firewall, Zscaler, and Cloudflare policy through automation tools and vendor APIs, with CI/CD implementation including policy linting, unit tests, and path simulation

Requirements

• 6-15 years of overall IT experience, with a strong background in network security architecture and engineering
• Expertise in Check Point Security Gateways, Palo Alto Networks next-generation firewalls, and firewall cluster/HA design
• Proficiency in Zscaler Internet Access and Zscaler Private Access for zero-trust and identity-aware access control
• Knowledge of Cloudflare Magic Transit, Magic WAN, and WAF for DDoS mitigation and application protection
• Familiarity with cloud hybrid connectivity, including Site-to-Site VPN, Cloud Interconnect, and BGP routing
• Understanding of SD-WAN, MPLS, and SASE architectures with policy-based routing and strong encryption protocols
• Skills in Microsoft Sentinel and SIEM platforms for telemetry normalisation, detection engineering, and incident response
• Competency in automation and policy-as-code using Terraform, Ansible, and vendor REST APIs
• Qualifications in regulatory compliance and audit readiness, including control matrices and CIS Benchmarks

We offer

• Opportunity to work on technical challenges that may impact across geographies
• Vast opportunities for self-development: online university, knowledge sharing opportunities globally, learning opportunities through external certifications
• Opportunity to share your ideas on international platforms
• Sponsored Tech Talks & Hackathons
• Unlimited access to LinkedIn learning solutions
• Possibility to relocate to any EPAM office for short and long-term projects
• Focused individual development
• Benefit package:
  • Health benefits
  • Retirement benefits
  • Paid time off
  • Flexible benefits
• Forums to explore beyond work passion (CSR, photography, painting, sports, etc.)