Senior Python Engineer - Encryption & PHI Security

Jobtailor; San Francisco (CA); On-site; USD 180,000 - 230,000; Full time

Job summary

Jobtailor is seeking a Senior Backend Security Engineer to design and evolve encryption and key-management systems across cloud deployments, with a focus on protecting user data and credentials.

You will collaborate with security and infrastructure teams to plan migrations, implement cryptographic controls, and ship production-ready Python services that secure data in transit and at rest.

Qualifications

• 4+ years of experience building and operating production backend systems.
• Strong experience with Python in production codebases.
• Hands-on experience implementing and operating security-critical product systems, including code that enforces guarantees.
• Depth in encryption and key management, signing, authentication, sessions, or token infrastructure.
• Practical knowledge of applied cryptography.
• Experience migrating critical systems without disrupting customers or data accessibility.

Responsibilities

• Design and evolve encryption and key-management systems for deployments (hosted, VPC, and on-premises).
• Build controls to detect, transform, and safely handle PHI, PII, and other sensitive data across workflows, connectors, model calls, logs, and storage.
• Protect customer credentials and tokens from storage and access control through runtime use.
• Improve tenant isolation, signing and verification, session and token handling, and service-to-service authentication.
• Build Python services, libraries, and APIs that standardize security-critical behavior.
• Plan and execute migrations, compatibility periods, staged rollouts, observability, recovery, and rollback.
• Define technical approaches, write production code, plan migrations, and remain accountable for production behavior.
• Take projects from investigation and design through implementation, migration, rollout, and operation.
• Collaborate with established security and infrastructure teams when problems cross application and platform boundaries.

Skills

Python Development

Encryption And Key Management

Sensitive Data Processing

Applied Cryptography

Security-Critical Systems

Production Code Development

Observability

Tools

HashiCorp Vault

Cloud KMS

HSMs

PKI

Certificate Systems

Job description

Jobtailor is seeking a Senior Backend Security Engineer to design and evolve encryption and key-management systems across cloud deployments, with a focus on protecting user data and credentials.

You will collaborate with security and infrastructure teams to plan migrations, implement cryptographic controls, and ship production-ready Python services that secure data in transit and at rest.