Cloud Security Engineer

Mosaic.tech; San Francisco (CA); On-site; USD 200,000 - 265,000; Full time

Benefits offered by this job

Health benefits

Flexible Paid Time Off

Salary and equity

Job summary

Hex is seeking an experienced Cloud Security Engineer to join its security team in San Francisco. You will design and manage security for AWS and Kubernetes, build infrastructure-as-code with Terraform, and lead security practices across CI/CD pipelines.

The role requires hands-on expertise in cloud security, Kubernetes hardening, and Terraform, with strong collaboration to ensure compliance with SOC 2, ISO 27001, GDPR, HIPAA, and PCI DSS. Excellent leadership and communication are essential.

Qualifications

• 5+ years of experience in cloud security engineering, with extensive expertise in AWS.
• Proficiency with Kubernetes security: RBAC, network policies, container vulnerability management.
• Expert-level knowledge and hands-on Terraform.
• Familiarity with AWS security services (IAM, GuardDuty, Security Hub, CloudTrail, WAF).
• Familiarity with CNAPP solutions such as Wiz.
• Familiarity with SIEM solutions such as Panther.
• Solid understanding of secure software development lifecycle practices, CI/CD security, and DevSecOps methodologies.
• Relevant certifications such as AWS Certified Security – Specialty, CK S, and Terraform Associate certification are highly desirable.
• Bonus points for security certifications from SANS or OffSec.
• Excellent problem‑solving, communication, and leadership skills.

Responsibilities

• Design, implement, and manage security solutions and controls for AWS environments and Kubernetes clusters.
• Build, deploy, and maintain infrastructure-as-code using Terraform, ensuring robust security standards are enforced.
• Conduct security assessments, threat modeling, and audits on AWS cloud infrastructure and Kubernetes deployments.
• Collaborate with development and operations teams to embed security best practices into CI/CD pipelines.
• Monitor and respond to cloud security incidents, identifying root causes and recommending remediation actions.
• Provide expertise in compliance requirements related to cloud security (e.g., SOC 2, ISO 27001, GDPR, HIPAA, PCI DSS).
• Mentor engineers and advocate for cloud security across the organization.

Skills

AWS expertise

Kubernetes security

Terraform

AWS security services

CNAPP Wiz

Panther SIEM

DevSecOps

AWS Security Specialty

CKS

Terraform Associate

Leadership

Tools

Terraform

Kubernetes

AWS

Job description

About the role

We are looking for an experienced Cloud Security Engineer to join Hex’s security team. You will be responsible for ensuring the security and resilience of our cloud infrastructure, providing leadership in cloud security practices, and collaborating closely with our infrastructure and engineering teams to secure our cloud-native applications.

About the role:

• Design, implement, and manage security solutions and controls for AWS environments and Kubernetes clusters, including appropriate isolation/sandboxing methods for Hex’s RCE-as-a-Service platform
• Build, deploy, and maintain infrastructure-as-code using Terraform, ensuring robust security standards are enforced.
• Conduct security assessments, threat modeling, and audits on AWS cloud infrastructure and Kubernetes deployments.
• Collaborate with development and operations teams to embed security best practices into CI/CD pipelines.
• Monitor and respond to cloud security incidents, identifying root causes and recommending remediation actions.
• Provide expertise in compliance requirements related to cloud security (e.g., SOC 2, ISO 27001, GDPR, HIPAA, PCI DSS).
• Mentor engineers and advocate for cloud security across the organization.

About you:

• 5+ years of experience in cloud security engineering, with extensive expertise in AWS.
• Demonstrated proficiency with Kubernetes security including cluster hardening, role‑based access control (RBAC), network policies, and container vulnerability management.
• Expert‑level knowledge and hands‑on experience with Terraform.
• Familiarity with AWS security services (e.g., IAM, GuardDuty, Security Hub, CloudTrail, WAF).
• Familiarity with CNAPP solutions such as Wiz
• Familiarity with SIEM solutions such as Panther
• Solid understanding of secure software development lifecycle practices, CI/CD security, and DevSecOps methodologies.
• Relevant certifications such as AWS Certified Security – Specialty, Certified Kubernetes Security Specialist (CKS), and Terraform Associate certification are highly desirable.
• Bonus points for security certifications from SANS or OffSec.
• Excellent problem‑solving, communication, and leadership skills.

Our Engineering team

We’re a group of engineers who are forging new ground together and love partnering with Security on our journey to pull ahead of our competition. You can read about how we think through problems as well as how we learn from mistakes on our blog:

• How we took down production…
• Beyond Linear Notebooks
• A pragmatic approach to live collaboration

Our stack

Our product is a web-based notebook and app authoring platform. Our frontend is built with Typescript and React, using a combination of Apollo GraphQL and Redux for managing application state and data. On the backend, we also use Typescript to power an Express/Apollo GraphQL server that interacts with Postgres, Redis, and Kubernetes to manage our database and Python kernels. Our backend is tightly integrated with our infrastructure and CI/CD, where we use a combination of Terraform, Helm, and AWS to deploy and maintain our stack.

In addition to our unique culture, Hex proudly offers a competitive total rewards package, including but not limited to, market‑bench salary & equity, comprehensive health benefits, and flexible paid time off.

The salary range for this role is: $200,000 - $265,000

The salary range shown may be a reflection of additional factors such as geographical location and skill ranges/levels we’re open to. Placement in the salary range will be decided upon completion of the interview process, taking into account factors like leaving room for growth, internal fairness & parity, your demonstrated skills, and the depth of your experience.