Senior Security Engineer, Networking

Company: Klaviyo Inc.
Location: Denver
Posted on: April 20, 2025

Job Description:

At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you're a close but not exact match with the description, we hope you'll still consider applying. Want to learn more about life at Klaviyo? Visit careers.klaviyo.com to see how we empower creators to own their own destiny.As an Infrastructure Security Engineer focused on networking you'll be joining the Infrastructure Security Team, you can expect to be deeply involved in strategic discussions on how we secure and optimize our network infrastructure. This includes designing and implementing robust network security solutions, monitoring network traffic for threats, and collaborating with cross-functional teams to ensure our network remains secure and resilient. You will set the direction for Klaviyo's engineering teams with a Security First focus on network and cloud infrastructure.How You Will Make a Difference

• Provide technical leadership that drives technology choices and architectural decisions across multiple teams, offering solutions for complex problems around network security standards and best practices.
• Design, implement, and manage network security solutions, including next-generation firewalls, IDS/IPS, and VPNs to protect Klaviyo's global network infrastructure.
• Monitor and analyze network traffic using advanced tools to detect and respond to security incidents, ensuring timely mitigation of threats.
• Implement and advocate for network segmentation and zero trust architectures, reducing attack surfaces and preventing lateral movement within the network.
• Manage and secure cloud network infrastructures, focusing on VPC configurations, security group policies, and network access controls in AWS, GCP, and Azure.
• Automate network security tasks using scripting and infrastructure as code tools to increase efficiency and reduce the potential for human error.
• Conduct regular network security assessments and penetration tests, identifying vulnerabilities and driving remediation efforts.
• Collaborate closely with Klaviyo's Engineering, IT, and Product teams to integrate network security into all aspects of our systems and services.
• Develop and enforce network security policies and procedures, ensuring compliance with industry regulations such as PCI DSS, GDPR, and SOC 2.
• Educate and mentor team members on network security best practices, fostering a culture of security awareness and continuous improvement.
• Stay ahead of emerging network security threats and technologies, adapting strategies to proactively mitigate risks.Who You Are
  • Have 4+ years of experience in network security engineering and infrastructure protection.
  • Security domain expertise in designing, implementing, and managing secure network infrastructures in both on-premises and cloud environments.
  • Achieved certifications or participated in advanced training on network security (e.g., CISSP, CCNP Security, CCIE Security, GIAC GSEC, or equivalent).
  • Proven experience with enterprise-grade firewall platforms (e.g., Palo Alto Networks, Cisco ASA/Firepower), IDS/IPS technologies, and VPN solutions.
  • Deep understanding of network protocols and technologies, including advanced routing and switching concepts.
  • Experience securing cloud network environments, with hands-on knowledge of AWS networking services like VPCs, Transit Gateways, and security groups.
  • Familiarity with network automation and scripting, using tools like Ansible, Python, or similar to streamline security processes.
  • Knowledge of zero trust principles and experience implementing network segmentation strategies.
  • Strong analytical and problem-solving skills, with experience in threat detection, incident response, and vulnerability management.
  • Excellent communication and teamwork abilities, capable of articulating complex security concepts to technical and non-technical stakeholders.
  • Passionate about staying current with the latest network security trends and technologies, and applying them to enhance our security posture.Massachusetts Applicants:It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.The pay range for this role is listed below. Sales roles are also eligible for variable compensation and hourly non-exempt roles are eligible for overtime in accordance with applicable law. This role is eligible for benefits, including: medical, dental and vision coverage, health savings accounts, flexible spending accounts, 401(k), flexible paid time off and company-paid holidays and a culture of learning that includes a learning allowance and access to a professional coaching service for all employees.Base Pay Range For US Locations:$152,000 - $228,000 USDGet to Know KlaviyoWe're Klaviyo (pronounced clay-vee-oh). We empower creators to own their destiny by making first-party data accessible and actionable like never before. We see limitless potential for the technology we're developing to nurture personalized experiences in ecommerce and beyond. To reach our goals, we need our own crew of remarkable creators-ambitious and collaborative teammates who stay focused on our north star: delighting our customers. If you're ready to do the best work of your career, where you'll be welcomed as your whole self from day one and supported with generous benefits, we hope you'll join us.Klaviyo is committed to a policy of equal opportunity and non-discrimination. We do not discriminate on the basis of race, ethnicity, citizenship, national origin, color, religion or religious creed, age, sex (including pregnancy), gender identity, sexual orientation, physical or mental disability, veteran or active military status, marital status, criminal record, genetics, retaliation, sexual harassment or any other characteristic protected by applicable law.IMPORTANT NOTICE: Our company takes the security and privacy of job applicants very seriously. We will never ask for payment, bank details, or personal financial information as part of the application process. All our legitimate job postings can be found on our official career site. Please be cautious of job offers that come from non-company email addresses (@klaviyo.com), instant messaging platforms, or unsolicited calls.By clicking "Submit Application" you consent to Klaviyo processing your Personal Data in accordance with our Job Applicant Privacy Notice. If you do not wish for Klaviyo to process your Personal Data, please do not submit an application.You can find our Job Applicant Privacy Noticehere .
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Keywords: Klaviyo Inc., Parker , Senior Security Engineer, Networking, Engineering , Denver, Colorado