Senior Full-Stack Engineer, AI-Powered Compliance Platform

Sphere is seeking a Senior Full Stack Engineer to own and build out new product lines (input tax, withholding tax, e-invoicing, tariffs) and critical platform components. You will contribute to scaling the AI-native compliance platform and drive ARR growth with end-to-end ownership.

You will ship mission-critical features, manage a dedicated component, and collaborate with clients to improve filing generation and submission speed, while mentoring other engineers in your areas of expertise.