Principal Security Engineer
Aiwyn · Remote (US based)
About this role
## Principal Security Engineer ### About Aiwyn Aiwyn is the first complete platform for modern Accounting Firms. Backed by top-tier investors like Bessemer, KKR, and Revolution, we build category-defining technology with world-class people, processes, and products. We’re replacing brittle, decades-old accounting practice management systems with software accounting firms can actually trust—and we have rare product-market fit in an industry that’s about to change permanently. ### About the Role We’re looking for a **Principal Security Engineer** to help strengthen and mature engineering security at Aiwyn. This is a **hands-on technical leadership** role focused on securing our **SaaS platform**, **development infrastructure**, and **software delivery systems**. You’ll partner closely with engineering leadership and teams to identify risks, improve security practices, and build the tooling and automation needed to make secure development easier. You’ll play a key role in advancing our engineering security capabilities, with a particular focus on **software supply chain security**, **vulnerability management**, and **secure development practices**. ### What You’ll Do - **Software Supply Chain Security:** Improve security across CI/CD pipelines, build infrastructure, dependencies, and deployment processes; establish secure, reliable software delivery practices. - **Vulnerability Management:** Own and improve vulnerability scanning and remediation capabilities, including tooling, automation, prioritization, and integration into engineering workflows. - **Product & SaaS Security:** Partner with engineering teams to strengthen application, cloud, and infrastructure security; address risks around customer data, access controls, APIs, and third-party integrations. - **Security Architecture:** Lead threat modeling and security reviews for critical systems; help teams identify risks and make sound architectural decisions. - **AI Security:** Explore how emerging AI capabilities (including tools/models such as Daybreak and Mythos) can improve security engineering; help teams understand and address risks introduced by AI-assisted development, agents, and LLM integrations. - **Security Strategy:** Partner with engineering leadership to identify gaps, prioritize improvements, and establish practical security standards and processes. - **Technical Leadership:** Own security initiatives from design through implementation; influence technical decisions; help build security expertise across engineering. ### What We’re Looking For - Strong engineering background in software, platform, infrastructure, or security engineering, with hands-on experience building and operating complex systems. - Solid security fundamentals and practical experience improving security in software development, cloud infrastructure, or production environments. - Experience with software delivery security (CI/CD, vulnerability management, supply chain security, or related areas). - Understanding of SaaS security, including protecting customer data, securing applications, and operating cloud-based services. - AI-forward mindset and interest in emerging AI security capabilities. - Technical leadership and ownership—able to drive complex initiatives, collaborate across teams, and balance security with engineering needs. ### Experience That Would Be Valuable (Nice to Have) - Software supply chain security (SLSA, SBOMs, artifact signing, build provenance) - Security scanning and rem
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