Application Security Lead
Hands-on Application Security Lead owning security posture for a scaling SaaS platform. Focuses on multi-tenant isolation, threat modeling, API security, and multi-cloud architecture in distributed systems. Requires early security hire experience at SaaS/data infra companies with deep systems expertise.
About the job
Responsibilities
- Own Hightouch's application security posture end-to-end.
- Solve security problems in distributed systems: multi-tenant isolation (~1M data syncs/day, 100K+ events/sec), sub-tenant access control, security architecture (compute isolation, threat modeling, hardening new products).
- Improve internet-facing APIs: rate limiting, abuse detection, granular access control.
- Support multi-region/multi-cloud backend, extend to new regions for data residency.
- Own roadmap: identify highest-leverage problems and fix them (hands-on in codebase).
Requirements
- Early security hire (first 1-3) at SaaS/data infrastructure company.
- Securing multi-tenant platforms: tenant isolation, authorization models.
- Cloud security across multiple clouds, customer-owned accounts.
- Designed/built data infrastructure as early engineer, securing from design/redesigns.
- Privacy-adjacent security: PII handling, data residency, GDPR/CCPA controls.
- Read application code, threat model distributed systems, ship production fixes.
- Significant distributed systems expertise.
Skills
Multi-Tenant Isolation, Authorization, Threat Modeling, Rate Limiting, Abuse Detection, Access Control, Cloud Security, Multi-Cloud, Multi-Region, Distributed Systems, Data Residency, Pii Handling, GDPR, CCPA, Kubernetes
Similar jobs
Security Engineering jobs
Idme
McLean, VA
Leads cloud-native security operations, incident response, threat hunting, and forensic investigations while mentoring SOC analysts and improving detection processes. Requires 8+ years in information security, including hands-on cloud incident response and experience with Kubernetes, CI/CD, and advanced security tools.
ConductorOne
San Francisco, CASenior Security Engineer responsible for application, cloud, and platform security, with a focus on automating security workflows, threat modeling, secure development, and remediation. Requires hands-on SaaS security, cloud infrastructure, code review, and agent or automation experience.
Mercor
San Francisco, CA
Leads the company’s security GRC function, owning SOC 2, ISO 27001, enterprise audits, third-party risk, policy governance, and automated evidence workflows. Requires 7+ years of GRC or audit experience, end-to-end SOC 2 and ISO 27001 ownership, and strong security tooling expertise.
Anthropic
San Francisco, CALeads technical SOX controls assurance for financially significant systems, translating audit requirements into engineering acceptance criteria and continuous monitoring. Requires ITGC and SOX 404 expertise, strong engineering fluency, programming ability, and cross-functional collaboration with Finance, Engineering, and auditors.
Discord
United States
Senior platform security engineer responsible for building identity and access management systems, Zero Trust architecture, cloud security baselines, and secure developer platforms. Requires 5+ years operating production systems and strong software development and security experience.