At a Glance
At Affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most.
Affirm values information security as a critical part of the company’s continued success. Our mission is to make information security programmatic and cultural in Affirm, enabling the company to succeed in building honest financial products. The Security team posture increases security and reduces risk while securely enabling access to information for those who need it!
The Senior Product Security Engineer candidate will have experience building and architecting software as part of a larger team. The ideal candidate will work effectively with product and engineering teams to evaluate and influence product requirements, design, and implementation to improve the security of Affirm’s products.
Partner with Affirm product teams to ensure that security is included in every phase of the product development lifecycle.
Conduct threat modeling and architecture reviews to ensure threats are understood, documented, and mitigated.
Review and analyze product source code to identify security vulnerabilities and provide recommendations for secure implementation.
Seek out opportunities to automate processes when appropriate.
Identify emerging classes of vulnerabilities and developing solutions for them before they’re a problem.
Assist product teams in the development of security focused test cases to enforce security requirements.
Advise product teams on business security requirements early in the product development lifecycle.
Decompose large, cross-team projects into individual tasks. Manage scope across teams and drive toward project closure.
Deep understanding of web application architecture and design principles
Experience using modern software development and delivery techniques to develop cloud-based services. Python, Kotlin, Java, AWS, and Azure experience preferred.
Knowledge of common security flaws and resolution as published by OWASP, SANS, etc.
Experience with PCI or other regulated environments.
Experience conducting threat models for complex, distributed products using standard threat modeling techniques and methodologies.
Experience with standard authentication mechanisms, including SAML and OAuth2.
Understanding of continuous integration / continuous deployment processes and tools.
BS degree in related field or equivalent experience. MS degree in a related field or equivalent experience is a plus.
Base Pay Grade - N
Equity Grade - 9
Employees new to Affirm typically come in at the start of the pay range. Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills.
Base pay is part of a total compensation package that may include equity rewards, monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents.)
USA base pay range (CA, WA, NY, NJ, CT) per year: $195,000 - $255,000 USD.
USA base pay range (all other U.S. states) per year: $173,000 - $233,000 USD.
#LI-Remote
Remote-first with flexibility built inAffirm is proud to be a remote-first company. Most roles can be done from almost anywhere within the country of employment. Some positions may occasionally require in-person work at an Affirm office, and a few are office-based due to the nature of the work. All new hires will be invited to attend an in-person onboarding experience.
Benefits designed for youOur benefits reflect our commitment to care, transparency, and flexibility. Here are a few highlights:
We’re committed to providing an inclusive interview process, including accommodations for candidates with disabilities. If you need support, we’re happy to help.
For positions based in San Francisco or Los Angeles: Affirm considers qualified applicants with arrest and conviction records, as required by law.
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Source: Affirm careers · View original posting
Industry
financial services
Employees
2,400
935 engineers
Compiled from public job postings, careers pages, and company materials. Data may not reflect current state — verify during interviews.
Security Philosophy
Security Team
Section 2 — People and structure. Org model: Public evidence indicates a dedicated, centralized Application Security function that partners closely with product, engineering, infrastructure, risk, compliance, and other teams; the available posting does not establish whether engineers are permanently embedded. (Product Security Engineer II job posting, LinkedIn) Leader 1: Jeera Lert — Staff Security Engineer; LinkedIn: https://www.linkedin.com/in/jeeralert. Public profile states, "I lead the Red Team program at Affirm" and describes work spanning application, cloud, infrastructure, identity, and offensive security. (LinkedIn, accessed) Leader 2: Jared Stewart — Staff Security Engineer focused on enterprise security, SaaS security, identity, cloud security, and security automation; LinkedIn URL not identified in the available results. (SAINTCON 26 speakers page, accessed) Team size estimate: Search query used: "Affirm application security team LinkedIn". A reliable AppSec-specific employee count was not publicly available; result range: no defensible estimate. The available evidence identifies individual security engineers and a dedicated AppSec job opening but does not establish total team size. Active AppSec job postings: 1 clearly identified public posting — Product Security Engineer II. (LinkedIn Jobs; updated) Common skill and workflow patterns: application-risk assessment; secure design review; code and system-flow analysis; vulnerability triage, validation, severity assessment, remediation guidance, tracking, and reporting; collaboration with engineering; lightweight tooling and automation; secure coding guidance; reusable review patterns; and developer-facing documentation. (Product Security Engineer II job posting, LinkedIn) Common source pattern for findings: internal testing, bug bounty reports, security tooling, penetration tests, and other sources. (Product Security Engineer II job posting, LinkedIn)
Key Initiatives
Section 3 — Programs and workflows. Security Champions program Found/not found: No public evidence of a formal Security Champions program in the available results. Related security-culture activity: Jeera Lert’s public profile says he created and leads "Red Team Rundown," a voluntary technical series for approximately 900 engineers. (LinkedIn, accessed) Shift-left in CI/CD Public evidence supports early risk identification and code-informed analysis, but no specific public details were found for pre-commit hooks, IDE plugins, mandatory pipeline gates, or named CI/CD integrations. (Product Security Engineer II job posting, LinkedIn) Vulnerability management Intake sources: internal testing, bug bounty reports, security tooling, penetration tests, and other sources. (Product Security Engineer II job posting, LinkedIn) Workflow: triage, validation, severity assessment, remediation guidance, tracking, and reporting, with prioritization based on real-world risk. (Product Security Engineer II job posting, LinkedIn) Secure SDLC ceremonies Publicly described activities include secure design decisions, examination of system designs, data flows, trust boundaries, authentication and authorization models, code paths, and potential abuse cases. (Product Security Engineer II job posting, LinkedIn) New programs or tool rollouts in the last 6 months A public May 2026 session described Affirm’s lean cloud SecOps program with AWS and Expel, including onboarding AWS accounts, GuardDuty and CloudTrail coverage, 15-plus integrations, automation, and human handoffs; this is security-operations rather than AppSec-specific. (Expel LinkedIn post) A public profile states that Jeera Lert built an agentic security-testing platform using Python, FastAPI, Playwright, and security tooling to automate end-to-end application assessments while retaining human control over dangerous actions; the timing and production status are not independently established. (LinkedIn, accessed)
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