Principal AI/Product Engineer

Mannan Javid is a Principal Engineer with over 10 years of experience across fintech, healthcare, and national security. Most recently, they were a Principal Engineer at Capital One, where they shipped features for over 3 million daily users and delivered a revenue-generating product in two months. They are the founder of Spirit & Hammer, consulting and shipping AI products end-to-end, including building an agent harness for a security startup, releasing Sun Signal for circadian timing, and SkillGuard to protect agent skills and harness environments from malicious injection. They also have a Mannan MCP server. They are looking for senior/staff product or AI engineering roles, full-time or contract.