Senior DevOps Engineer

Join a team of brilliant, passionate innovators who wake up every day determined to transform healthcare. At BillionToOne, we've built something extraordinary—a culture where transparency fuels trust, collaboration drives breakthroughs, and every voice matters in our mission to make life-changing diagnostics accessible to all. We don't just aim for incremental improvements; we strive to build products that are 10x better than anything that exists today. Our people are our greatest asset: talented scientists, engineers, sales professionals, and visionaries united by an unwavering commitment to changing the standard of care in prenatal and cancer diagnostics. This is where cutting-edge science meets human compassion—every innovation you contribute helps remove fear of unknown from some of life's most critical medical moments. If you're driven by purpose, energized by innovation, and ready to help build the future of precision medicine, this is where you belong.

We are seeking a highly skilled Senior DevOps Engineer to help us integrate security practices within our DevOps pipeline while managing and developing secure, scalable solutions on Amazon Web Services (AWS). The ideal candidate will have a strong background in both security and system administration, with expertise in AWS infrastructure and the ability to automate security controls, monitor vulnerabilities, and implement secure coding practices across the entire software development lifecycle. You will work closely with development, operations, and security teams to ensure that our products and infrastructure are secure, resilient, and compliant.

Responsibilities:

• AWS Infrastructure Management: Design, build, and maintain scalable, secure infrastructure on AWS, leveraging services like EC2, ECS/EKS, Lambda, RDS, S3, VPC, IAM, and Route 53
• Infrastructure as Code (IaC): Automate provisioning and management using Terraform, CloudFormation, or Ansible; ensure infrastructure is defined, versioned, and secured according to best practices
• CI/CD Pipeline Security: Implement and secure continuous integration and deployment pipelines, ensuring security in every stage from development through production
• Security Integration: Integrate security practices into the development lifecycle—baking in secure coding, vulnerability monitoring, and automated controls across the SDLC
• Monitoring & Observability: Develop and maintain dashboards and alerts using DataDog, AWS CloudWatch, CloudTrail, GuardDuty, and Config; track vulnerabilities, incidents, and system performance
• Day-to-Day Operations: Support user