# Senior Backend Engineer (Infrastructure)
**Company:** [Sphere](https://hotfix.jobs/companies/sphere)
**Location:** San Francisco, CA
**Salary:** $230K-$260K
**Skills:** Kubernetes, AWS, GCP, Azure, Postgres, Python, Django, Terraform, Amazon Aurora, Elasticache Redis, Temporal, Aws Sqs, Amazon Alb, ECS, EKS
**Posted:** 2026-02-19
> Build and scale infrastructure for high-availability, low-latency tax compliance platform handling millions of global transactions. Manage Kubernetes clusters, Postgres at scale, and cloud-native services while participating in on-call and collaborating with customers.
## Job Description
## Responsibilities

- Find solutions to Sphere's toughest scaling, performance, and latency problems
- Work closely with engineering team to define tooling to help ship faster
- Participate in on-call rotation to solve critical production events
- Work directly with customers like Eleven Labs, Replit, Windsurf, and partners like Stripe, Chargebee on latency and availability requirements
- Influence and implement next generation of Sphere's database, real-time queue, and container orchestration infrastructure
- 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 architecture and increase velocity and ownership

## Requirements

- Experience managing **k8s clusters** in **AWS/GCP/Azure** at scale
- Extensive experience shipping high-quality architectures for mission critical systems (focus on high availability, high load, low latency)
- Experience with **Postgres** at scale

## Nice to Have

- Experience working with large volumes of transaction data
- Strong experience in **Python** (core application backend and data pipeline services built with Python and **Django**)
- Passionate about developer experience
- Very strong attention to detail
**Apply:** https://hotfix.jobs/jobs/senior-backend-engineer-infrastructure-at-sphere-ce704967-c2c8-410f-9711-debab4f0168d
**Canonical:** https://hotfix.jobs/jobs/senior-backend-engineer-infrastructure-at-sphere-ce704967-c2c8-410f-9711-debab4f0168d