Senior Full Stack Engineer

About Sphere

AI-powered sales tax, VAT and GST compliance

Tech

Web app - a Django/Python backend and a Nextjs/React front end powers a modern web based platform that offers functionality to 1. monitor indirect tax exposure, 2. register with tax authorities, 3. calculate / collect the correct sales tax within customer billing systems and 4. file / remit the correct indirect tax returns to relevant tax authorities. Tax-focused LLMs - we leverage new scraping tech and LLMs to collect, monitor and process tax rate and tax legislation data across the world. This feeds into our web app / customers systems via API.

The role

**Mission:**Sphere has built the world’s first AI-native tax engine that helps companies like Eleven Labs, Replit, Runway AI, Windsurf (+ many more) automate their sales tax, VAT and GST obligations:* We're growing rapidly (34%+ MoM revenue growth) and helping the fastest growing tech companies around the world including Eleven Labs, Replit, Windsurf, Fathom, Linktree, Photoroom, Sierra AI, Zed etc* We’ve spent the last 1.5 years building local rails into tax authorities in both the US and internationally to properly automate compliance processes (no other vendor has done this)* We're building the world's first AI-native tax engine (which will be the foundation for a broader cross border compliance platform; think Deel for international billing)* We're well funded by Felicis Ventures and YCSphere is looking for a versatile full stack engineer who can jump on different mission critical areas to help accelerate its production - e.g. filing infrastructure, tax engine and new product areas (input tax, withholding tax, e-invoicing). 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**Why this is a massive opportunity:**🌍 Massive TAM: Every business around the world needs this. Compliance isn’t optional.🌬️ Strong macro tailwinds: Businesses are expanding globally at a faster pace, while tax authorities are cracking down on cross-border compliance, driving urgent demand.✨ AI advantage: Incumbents can’t scale beyond the U.S.; our AI-native tax engine can.🔮 Product vision: Indirect tax is just the start; we’re building the Deel for international billing.**What you will do:**_Within weeks:_ * Ship features related to a key component of Sphere’s platform - e.g. filing infrastructure * Own and manage this key component, driving measurable outcomes * Work directly with customers like Eleven Labs, Replit and Windsurf to improve / optimize that key component of the platform (e.g. improve filing generation and submission speed \[x\]%)_Within months:_* Develop expertise across other key components of Sphere’s platform - e.g. tax engine, new products - to manage and execute improvements in this area * Lead / mentor additional engineers in component areas that you have worked in**What’s important to us:*** The Dog: Grit > pedigree.* Ship fast: If it can be done today, do it today.* Self-starter: No hand-holding* Accountability: You’ll be held accountable to objective, measurable targets each month.* In-person: SF only.**Requirements:** * Strong 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._Nice to have:_* Experience working with large volumes of transaction data. You’ll be getting very familiar with it!* Experience with Django or Python ORM

Skills

• Django
• Python
• React