Senior Product Engineer

Sphere has built the world’s first AI-native tax engine that helps companies like Lovable, 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 Lovable, 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 YC

Sphere is looking for a passionate product engineer to help build out new features / products on our roadmap and take our customer experience to the next level.

They’ll be working directly with customers, our design and eng team as well as our CEO / Founder to bring Sphere’s product vision of becoming the world’s first cross‑border compliance engine to life.

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 :

Work / listen to many of our customers on what their main pain points are and prioritize lowest hanging fruit features that can help solve their problems

Collaborate extensively with design on bringing those features to life

Executing and shipping features, end‑to‑end, on a daily basis

Doing customer support where necessary to understand our customers and how they think as much as possible

Within months :

Own our feature / product roadmap in conjunction with the CEO / Founder (you will work a lot together)

Build / implement more rigorous customer feedback / analysis processes to allow us to better prioritize roadmap

Requirements :

Strong experience with React. Our entire front end is built in react.

Strong experience with Figma. In order to collaborate efficiently with design.

Customer obsession. You’re going to be talking to a lot of people in the finance realm (Controller, Heads of Finance, Heads of Tax). You need to like them and obsess over them.

Very strong attention to detail. When you work with numbers this is a non‑negotiable - it’s not enough to be 99% right.

Strong organization skills. We get hundreds of feature requests every day. How you monitor, organize and prioritize these is key.

Nice to have :

Experience working with large volumes of transaction data. You’ll be getting very familiar with it!

Experience in Python and Django. Our core application backend and data pipeline services are built with Python and Django

Experience using tools like PostHog and Sentry

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.

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