a16z portfolio
Sphere
Building the world's first AI-powered, cross-border compliance engine.
15 open roles
Tax Support Specialist
Indirect Tax Filings Specialist
E-Invoicing Lead
VAT Lead
SALT Lead
GTM Engineer
AI Agent Infrastructure Lead
Founding Forward Deployed Engineer
Founding CSM
Senior Backend Engineer (Infrastructure)
Founding Growth Lead
Lead AI Engineer
Founding Account Executive (Europe)
Senior Full Stack Engineer
Founding Product Engineer