Staff Engineer, Application Security

Posted Sunday, August 30, 2026 at 4:00 AM

If you are looking for a career at a dynamic company with a people-first mindset and a deep culture of growth and autonomy, ACV is the right place for you! Competitive compensation packages and learning and development opportunities, ACV has what you need to advance to the next level in your career. We will continue to raise the bar every day by investing in our people and technology to help our customers succeed.

We hire people who share our passion, bring innovative ideas to the table, and enjoy a collaborative atmosphere.

ACV is a technology company that has revolutionized how dealers buy and sell cars online. We are transforming the automotive industry. ACV Auctions Inc. (ACV), has applied innovation and user-designed, data driven applications and solutions. We are building the most trusted and efficient digital marketplace with data solutions for sourcing, selling and managing used vehicles with transparency and comprehensive insights that were once unimaginable.

We are disruptors of the industry and we want you to join us on our journey.

• Multiple medical plans including a high deductible, low cost health plan
• Company-sponsored (paid) Short-Term Disability, Long-Term Disability, and Life Insurance
• Comprehensive optional benefits such as Dental, Vision, Supplemental Life/AD&D, Legal/, and Accident and Critical Illness Insurance
• Generous paid time off options, including uncapped vacation days, the greater of 3 paid sick days or in accordance with the applicable state or local paid sick leave law, 6 paid company holidays, 2 floating holidays, parental leave, bereavement leave, jury duty leave, voting leave, and other forms of paid leave as required by applicable law or regulation
• Employee Stock Purchase Program with additional opportunities to earn stock in the Company
• Retirement planning through the Company's 401(k)

ACV is looking for an Application Security Engineer to join our security team and lead the development and maturation of our Application Security (App Sec) program. This is a high-impact role for someone with a proven track record of embedding security into modern software development life cycles in SaaS environments. You'll work across engineering, product, and Dev Ops to ensure secure design, implementation, and deployment of our applications and services.

This role is ideal for a developer turned security leader who has built or significantly matured an App Sec program from the ground up and is looking to drive impact at scale within a fast-paced, cloud-native, Dev Sec Ops  environment.

• Actively and consistently support all efforts to simplify and enhance the customer experience.
• Design, implement, and scale ACV's Application Security Program, aligning with Secure SDLC best practices and taking a Shift Left by default approach.
• Serve as the subject matter expert for secure application architecture, code analysis, and application threat modeling.
• Partner with engineering and security teams to integrate security tools and controls into CI/CD pipelines (e.g., SAST, DAST, SCA, secrets management).
• Conduct and oversee escalated code reviews, security assessments, and pen testing of internal and external applications.
• Lead threat modeling workshops, security training, and awareness initiatives for developers and architects.
• Develop policies, standards, and automation to support a secure-by-default engineering culture.
• Drive remediation efforts by working hands-on with developers to fix critical vulnerabilities.
• Collaborate with compliance and risk teams to meet security…