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Senior Software Engineer - Encryption & PHI

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Senior Software Engineer - Encryption & PHI in USA

  • StackAI
  • Full time
  • Email
  • San Francisco, CA

Responsibilities

  • Build encryption and key-management systems supporting hosted, VPC, and on-premises deployments.
  • Develop controls for detecting, transforming, and safely handling PHI, PII, and other sensitive data across workflows, connectors, model calls, logs, and storage.
  • Secure customer-provided 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.
  • Create shared Python services, libraries, and APIs for consistent security-critical behavior.
  • Lead migrations, compatibility periods, staged rollouts, observability, recovery, and rollback for live systems.
  • Own technical work end to end from investigation and design through implementation and production operation.

Requirements

  • 4+ years of experience building and operating production backend systems.
  • Strong professional experience with Python in a substantial production codebase.
  • Hands-on experience implementing and operating security-critical product systems, including code that enforces their guarantees.
  • Meaningful depth in encryption and key management, signing/authentication/session/token infrastructure, multi-tenant isolation, sensitive-data processing, or secure customer-credential handling.
  • Practical knowledge of applied cryptography.
  • Experience changing critical systems without disrupting existing customers or making stored data inaccessible.
  • Strong judgment regarding trust boundaries, failure modes, and consequences of compromise.
  • Ability to take ambiguous technical problems from investigation through production rollout.
  • Prior healthcare experience is helpful but not required.
  • Bonus qualifications include HashiCorp Vault, cloud KMS products, HSMs, envelope encryption, key rotation, PHI/PII processing, PKI, certificate systems, cryptographic signing, sensitive-data SaaS, regulated industries, self-hosted/VPC/on-premises/air-gapped deployments, AI-agent or LLM architectures, and startup experience.

Benefits

  • The role is embedded in StackAI’s Core Engineering team with access to Asana’s established security and infrastructure teams when work crosses application and platform boundaries.

Salary: $248k - $282k/yr

StackAI

Enterprise AI trusted by Finance, Risk and Operations teams. Power your AI transformation strategy with StackAI. Backed by YC and Google. We are a small dedicated team of insanely talented individuals relentlessly pushing the boundaries of what’s possible with AI. We are pioneering a new horizont...

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