Manage VAT, GST, and sales tax worldwide with Sphere’s global tax compliance software. Automate registration, calculation, and filing seamlessly. Backed by Y Combinator, a16z and Felicis.
About the role
Sphere is looking for senior full stack engineers who will own and build out new product lines (input tax, withholding tax, e-invoicing, tariffs) as well as mission critical parts of the Sphere platform (filing infrastructure, tax engine and AI / agentic related features). These areas are key levers towards scaling Sphere and growing ARR, meaning that your work will have a direct impact on the growth of the business on a daily basis.
What they're looking for
- Experience in Python . Our core application backend and data pipeline services are built with Python and Django
- While frontend / React may not be your primary focus, you’re not afraid to dive in when needed
- Very strong attention to detail. When you work with numbers this is a non-negotiable - it’s not enough to be 99% right
More about this role
Every breakthrough in trade infrastructure has followed the same pattern: reduce a transaction cost, expand the market. Containerization for goods. SWIFT for money. Stripe for payments. Compliance is one of the last and largest — and the hardest, because trade rules aren't data to be looked up. They're a complex adaptive system with 190+ sovereign jurisdictions, in different languages, changing constantly, reacting to each other.
Sphere built the system that solves it. Our AI (TRAM) ingests global trade law, interprets it, resolves conflicts across jurisdictions, and produces compliance determinations more reliable than human experts. We handle the entire lifecycle — calculation, registration, filing, remittance — at millisecond latency with zero downtime.
Backed by a16z and YC. $21M Series A, 30%+ month-over-month growth, customers include ElevenLabs, Replit, Deel, Runway, and Lovable.
Small team, global surface area . Everyone owns a domain that would be a full team at a larger company. San Francisco, in office.
The problem keeps compounding. Expanding into input tax, withholding, e-invoicing, tariffs — each multiplies the complexity. Tens of millions of transactions today,...
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