Senior Application Security Engineer

Senior Security Engineer

Reports To: Sr. Director of IT & Security

Locations hiring from: Alabama, Arizona, Arkansas, California, Colorado, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Kansas, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Nevada, New Hampshire, New Jersey, New York, North Carolina, Ohio, Oregon, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Utah, Vermont, Virginia, and Wisconsin. 

Employment Type: Full-time

Role Overview:

As Oshi Health's first dedicated Senior Security Engineer, you will own the technical security of our fully remote, SaaSand cloud-native healthcare platform, protecting the sensitive health data of real people working to take back control from chronic GI conditions. This is a hands-on, builder-focused role, not a policy desk: you will set security architecture standards, harden identity and secrets management, and build security into our engineering and AI workflows from the start. It is a uniquely forward-looking opportunity to shape how a growing healthcare platform stays safe as it adopts agentic AI development, with your fingerprints on the foundation. 

What You'll Do — Key Responsibilities

• Own application and product security, including threat modeling, secure design review, and secure code review, with a focus on the access-control and secrets-exposure flaws that matter most for a member-facing healthcare app and its APIs. 
• Design and own the security architecture for Oshi's shift to an agentic software development lifecycle, including phase-gate criteria, out-of-band controls so AI-written code is never its own security gate, and tested clawback procedures for when risk spikes. 
• Build and run non-human identity and secrets management at scale, covering service accounts, scoped tokens, OAuth grants, and machine credentials across our SaaS and AWS estate. 
• Secure our AWS environment end to end, including IAM, network segmentation, logging, encryption, and workload protection across S3, EKS, and Terraform. 
• Enforce and tune our security tooling so it does real work, including GitHub Advanced Security (CodeQL, secret scanning, push protection), branch protection, and CODEOWNERS-enforced review on sensitive paths. 
• Review AI and third-party vendor integrations before they touch PHI, evaluating data flows, retention, and data loss-prevention needs with healthy skepticism toward vendor security claims. 
• Own vulnerability management and the penetration-testing relationship, driving findings to closure and feeding recurring issues back into the development process. 
• Support HIPAA Security Rule technical safeguards, stand up detection and response capabilities, and build the automation that lets a small security function operate with outsized leverage. 

What We're Looking For — Qualifications & Requirements

 Required 

• Bachelor's degree in Computer Science or equivalent practical experience. 
• 6+ years in security engineering, with demonstrated depth in application/product security and cloud security (AWS). Experience in healthcare, fintech, or another regulated, data-sensitive environment is a strong plus. 
• Hands-on with secure SDLC tooling: SAST/DAST, GitHub Advanced Security/CodeQL, secret scanning, and software supply-chain/dependency security. 
• Strong in identity and access management, including Okta, OAuth/OIDC, SAML, phishing-resistant MFA, and the management of non-human identities and secrets. 
• Familiarity with, or a genuine drive to go deep on, securing AI/LLM and agentic systems: prompt injection, agent authorization and over-permissioning, NHI sprawl, and model/supply-chain risk. 
• Comfortable being the sole security specialist on a small, cross-functional team, prioritizing ruthlessly by risk and able to explain a tradeoff clearly to both engineers and non-technical executives. 
• Working knowledge of the HIPAA Security Rule, SOC 2, and the NIST Cybersecurity Framework. 
• Proficient with scripting and automation (Python and at least one shell). 

Preferred 

• One or more certifications: OSCP, GIAC (e.g., GWAPT, GCSA, GCLD), AWS Certified Security – Specialty, CISSP, or Okta Certified Professional. 
• Experience operating a compliance-automation platform. 

Compensation & Benefits 

• Salary Range: $170,000 – $190,000 + bonus and meaningful equity 
• Health Benefits: 90% employee premiums paid for medical, dental, and vision coverage 
• Time Off: Flexible PTO plus 11 Holidays and 1 floating holiday
• Retirement: Eligibility to contribute to 401(k) 
• Work Style: Remote-first flexibility, work from home anywhere within our approved states in the US