# Senior Full Stack Engineer

**Company:** [Sphere](https://hotfix.jobs/companies/sphere)
**Location:** San Francisco, CA
**Role:** Fullstack Engineering
**Salary:** $230k – $260k/yr
**Skills:** Python, Django, React, Python Orm, Transaction Data Processing
**Posted:** 2025-09-16

> Builds and owns new product lines like input tax and e-invoicing, plus mission-critical platform features like filing infrastructure and AI components using Python/Django. Ships high-impact features, works directly with customers, and mentors engineers in a fast-paced early-stage environment.

## Job Description

## What You'll Do

* Ship mission critical features that clients will use daily - e.g. filing infrastructure
* Own and manage a feature and drive measurable outcomes
* Work directly with customers like Eleven Labs, Lovable and Deel to improve / optimize that key component of the platform (e.g. improve filing generation and submission speed [x]%)
* Own the end-to-end development of new products lines that will help build out our AI-native revenue-based compliance platform
* Lead / mentor additional engineers in component areas that you have worked in

## Requirements

* 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 Haves

* Experience working with large volumes of transaction data. You’ll be getting very familiar with it!
* Experience with **Django** or **Python ORM**

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**Apply:** https://hotfix.jobs/jobs/16fb9dfb-7219-4570-9744-c276fd7aa620
**Canonical:** https://hotfix.jobs/jobs/16fb9dfb-7219-4570-9744-c276fd7aa620