Jack & Jill seeks a Founding Engineer to architect our fintech SaaS platform in San Francisco. Lead development of secure payment processing systems. Integrate real-time compliance APIs with banking partners. Optimize backend for high-volume transactions using microservices. Daily tasks include prototyping features and iterating with product leads on risk analytics modules. Hold a BS in Computer Science or equivalent. Bring 4+ years in software engineering. Master Ruby on Rails, PostgreSQL, and AWS. Experience with fintech regulations essential. Excel in full-stack development. Thrive on rapid problem-solving. Dynamic startup culture. Competitive pay and equity.