Senior AppSec Engineer: Build Secure SaaS & AI

Showcify, Inc.; United States; Remote; USD 190,000 - 238,000; Full time

Benefits offered by this job

Equity

401(k) plan

Paid holidays

Flex PTO

Parental leave

Job summary

Apollo.io is seeking a Senior Application Security Engineer to strengthen its secure SDLC across product, platform, and AI features. This senior IC role blends code-level security work with cross-functional partnership, including threat modeling, tooling, and remediation leadership.

The role operates at an IC level with semi-annual/annual goals and cross-team influence, requiring strong UX with security and collaboration across Engineering, Product, Platform, and Legal teams.

Qualifications

• 5+ years of software engineering or application security experience in modern SaaS environments.
• Strong code-reading and production deployment skills; Ruby is valuable, Python a plus.
• Deep Linux and cloud fundamentals, preferably in GCP-backed environments.
• Experience performing deep code reviews, pen tests, and durable remediations.
• Experience with bug bounty, pentests, or automated security tooling.
• Experience securing AI-powered systems and AI APIs.
• Excellent written and verbal communication, stakeholder management.

Responsibilities

• Own and continuously improve the secure software development lifecycle for Apollo applications.
• Perform application security reviews, threat modeling, and deep code-level analysis for high-impact features before launch.
• Provide practical security architecture guidance to Engineering, Product, and IT teams.
• Help define and maintain application-security guardrails, secure design expectations, code review standards, and risk models.
• Drive vulnerability management across internal reviews, bug bounty, pentests, SCA/runtime findings, ensuring findings are validated and tracked within SLAs.
• Read the code, explain root cause, propose safe fixes, and support remediation for complex vulnerabilities.
• Perform hands-on validation and offensive testing to confirm remediations address root causes.

Skills

AppSec depth

Code review

Threat modeling

Secure SDLC

Python

Ruby

Cloud/GCP

AI security

Communication

Tools

SAST tooling

Bug bounty

Penetration testing

CI/CD security tooling

Job description

Apollo.io is seeking a Senior Application Security Engineer to strengthen its secure SDLC across product, platform, and AI features. This senior IC role blends code-level security work with cross-functional partnership, including threat modeling, tooling, and remediation leadership.

The role operates at an IC level with semi-annual/annual goals and cross-team influence, requiring strong UX with security and collaboration across Engineering, Product, Platform, and Legal teams.