Senior Backend Engineer (Infrastructure)

🌍 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:

Find solutions to Sphere's toughest scaling, performance, and latency problems

Work closely with engineering team to define tooling to help us ship even faster

Participate in an On Call rotation to solve critical production events

Work directly with customers like Eleven Labs, Replit, Windsurf, and partners like Stripe, Chargebee, on their latency and availability requirements.

Within months:

Influence and implement the next generation of Sphere's database, real-time queue, and container orchestration infrastructure

Work across our engineering organization to introduce and scale best practices with cloud-native technologies like Amazon ALB, ECS/EKS, Temporal, AWS SQS, Amazon Aurora PostgreSQL, Elasticache Redis, and S3

Build abstractions within Terraform to simplify the architecture and increase velocity and ownership