Senior Application Security Engineer

Configure and improve AppSec tooling and integrations, including SAST configuration, ignore lists, dashboards, and other controls that maintain useful coverage without excessive noise.

Select, build, or refine security tooling, small automations, and workflow enrichments that reduce manual effort and scale AppSec operations responsibly.

Use AI to automate, transform, and scale security and engineering-adjacent processes where it materially improves speed, consistency, or signal quality, while still validating outputs with strong engineering judgment.

Embed AI-specific security checks into SSDLC reviews and code analysis, including input and output handling, AI-exposed APIs, prompt and response guardrails, and abuse or data-exfiltration paths.

Partner cross-functionally on AI security requirements and controls so AI systems and AI-powered features are designed, deployed, and operated securely.

Support and scale security enablement for engineers and security champions, including secure coding, AppSec, and AI-safety content.

Provide actionable remediation guidance, secure patterns, and examples that help engineering teams fix issues quickly and correctly.

Partner closely with Engineering, Product, Platform, Data, Legal, and other security teams to keep AppSec priorities aligned with business risk and product velocity.

Produce clear documentation, metrics, and written narratives that improve AppSec visibility, observability, and decision-making.

Owns meaningful AppSec goals over a semi-annual or annual horizon and independently identifies the right solutions to ambiguous, open-ended problems.

Drives cross-team collaboration and operational improvements beyond isolated tickets or one-off reviews

Makes informed decisions by balancing technical detail, business context, customer trust, and long-term risk

Sets a high bar for ownership, communication, mentoring, and technical judgment, and helps raise the effectiveness of peers and partner teams.

5+ years of software engineering or application security experience, with meaningful hands-on AppSec depth in modern SaaS environments.

Strong software development skills and the ability to read, write, and ship production code; Ruby experience is highly valuable, and Python or similar scripting ability is a plus.

Strong Linux and cloud fundamentals, ideally with experience in GCP-backed environments.

Deep familiarity with common AppSec issues, secure design, secure authentication and authorization patterns, vulnerability management, and developer security tooling.

Demonstrated ability to perform deep code review, penetration testing, and exploit-oriented validation, and to either fix vulnerabilities directly or work closely with engineers to land durable remediations that hold up against bypass attempts and variant analysis.

Experience handling findings from bug bounty, pentests, internal reviews, or automated security tooling through closure and verification.

Experience using AI-assisted tools, automations, APIs, or structured workflows to improve engineering or security processes at scale.

Experience securing AI-powered systems or features, including AI API exposure, prompt and response handling, data protection, misuse scenarios, and monitoring expectations.

Strong written and verbal communication, stakeholder management, and influencing skills across technical and non-technical partners.

Experience supporting or leading security reviews for AI-native products, internal agents, or AI-assisted engineering workflows.

Experience improving secure-by-design practices and AppSec observability in a fast-moving engineering organization

Experience with security training, developer enablement, or security champions programs

Relevant security certifications are a plus

Improve the health and flow of AppSec findings by keeping prioritization, remediation, and verification moving within defined SLAs.

Complete recurring application reviews or threat models for important systems and features

Increase engineering adoption of secure patterns, AppSec tooling, and security training

Reduce manual toil and improve AppSec signal quality through targeted automation and responsible use of AI-assisted workflows.

The listed Pay Range reflects the total cash compensation inclusive of annual base salary and annual bonus as applicable. For sales roles, the range provided is the role’s On Target Earnings ("OTE") range, meaning that the range includes both the sales commissions/sales bonus target and annual base salary for the role. This salary range may be inclusive of several career levels at Apollo and will be narrowed during the interview process based on a number of factors, including the candidate’s experience, qualifications, and location. Applicants interested in this role who are not located in the US may request the annual salary range for their location during the interview process.

Additional benefits for this role may include: equity; company bonus or sales commissions/bonuses; 401(k) plan; at least 10 paid holidays per year, flex PTO, and parental leave; employee assistance program and wellbeing benefits; global travel coverage; life/AD&D/STD/LTD insurance; FSA/HSA and medical, dental, and vision benefits.

Apollo.io is an AI-native company built on a culture of continuous improvement. We’re on the front lines of driving productivity for our customers—and we expect the same mindset from our team. If you're energized by finding smarter, faster ways to get things done using AI and automation, you'll thrive here.

At Apollo, we’re driven by a shared mission: to help our customers unlock their full revenue potential. That’s why we take extreme ownership of our work, move with focus and urgency, and learn voraciously to stay ahead.

We invest deeply in your growth, ensuring you have the resources, support, and autonomy to own your role and make a real impact. Collaboration is at our core—we’re all for one, meaning you’ll have a team across departments ready to help you succeed. We encourage bold ideas and courageous action, giving you the freedom to experiment, take smart risks, and drive big wins.

If you’re looking for a place where your work matters, where you can push boundaries, and where your career can thrive—Apollo is the place for you.

Learn more here!