Senior Network Security Engineer (,, United States)

Overview Senior Network Security Engineer role at Block. The Network Security team safeguards Block's global infrastructure by designing, implementing, and monitoring security controls that protect data and services across hybrid cloud and on-prem environments. The role focuses on building secure, scalable, and resilient systems while enabling the business to innovate quickly and safely. The Network Security team is responsible for architecting, deploying, and maintaining security technologies that defend against evolving threats, while partnering with engineering and operations teams to embed security into core infrastructure. This position requires a strong technical foundation, hands-on network security expertise, and the ability to lead projects that balance business needs with risk management. Responsibilities Architect, build and deploy network security controls (firewalls, VPNs, IDS / IPS, WAFs, and cloud-native equivalents) Secure connectivity across multi-cloud and hybrid environments Automate security operations and infrastructure changes using Infrastructure-as-Code (Terraform, CloudFormation or similar) Implement monitoring and observability for network traffic, policies, and anomalies Collaborate with platform teams to embed security into service design and delivery Mentor engineers on cloud-native network security practices and automation Qualifications Extensive experience in network security engineering (typically 6 years) Strong foundation in TCP / IP, routing, segmentation, and secure network architecture Hands-on expertise with cloud-native networking and security (AWS / GCP VPC networking, Security Groups, Transit Gateway, service mesh) Proficiency in programming / scripting (Python, Go, or similar) for automation, tooling, and integration Experience with Infrastructure-as-Code (Terraform, CloudFormation or similar) Familiarity with Kubernetes or container networking, ingress / egress security, and service mesh mTLS Experience integrating security into DevOps workflows and CI / CD pipelines Knowledge of edge security solutions such as WAFs, DDoS mitigation, CDN protections, and API security gateways Strong troubleshooting and communication skills with the ability to influence across teams Seniority level : Mid-Senior level Employment type : Full-time Job function : Information Technology Referrals increase your chances of interviewing at Block by 2x Get notified about new Senior Network Security Engineer jobs in San Francisco Bay Area. Compensation and Location Block uses a market-based pay approach. U.S. locations are categorized into four zones based on cost of labor indices. Starting pay is determined by job-related skills, experience, location, and market conditions. Zones are : Zone A $217,800$326,800 USD Zone B $207,000$310,400 USD Zone C $196,100$294,100 USD Zone D $185,200$277,800 USD To find a locations zone designation, refer to the provided resource. If a location is not listed, speak with a recruiter for additional information. Use of AI in Hiring We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. Contact privacy@block.xyz with questions about hiring practices or data usage. Benefits and Workplace Block offers benefits designed to empower you to do the best work of your career, including remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning. Check out our other benefits at Block. Block, Inc. (NYSE : XYZ) builds technology to increase access to the global economy. Our brands include Square, Cash App, Afterpay, TIDAL, Bitkey, and Proto, each unlocking different aspects of the economy for more people. We are building a financial system that is open to everyone. Privacy Policy J-18808-Ljbffraa415a4b-8b21-40fc-a65c-70d2b25ca29a