Software Engineer, Full Stack
Mantle, San Francisco
The role
This position is core to our product and company culture. As Founding Software Engineer, you'll architect and build our consumer-facing platform from the ground up. Your job is to create exceptional web experiences that customers love, while integrating AI agents that handle complex family tasks automatically. You'll own significant parts of our technical infrastructure, work directly with founders on product direction, and make architectural decisions that will scale with millions of users.
What you will do
- Consumer-facing web/mobile application: onboarding flows, user dashboards, account management, and all the core web functionality families interact with daily
- AI agent experiences that integrate seamlessly into the web product, making powerful capabilities feel intuitive and trustworthy
- Robust, scalable infrastructure on AWS supporting both traditional web features and AI workloads
- Payment flows, data visualizations, notification systems, and real-time user interfaces
- Integration layers connecting AI models, third-party services, and internal systems into cohesive user experiences