Senior Full-Stack Engineer — Shape Unified Experiences

Fanatics Inc.; Los Angeles, New York (CA, NY); On-site; USD 144,000 - 180,000; Full time

Job summary

Fanatics Collectibles is seeking a Senior Full Stack Engineer to unite multiple experiences into a shared surface architecture. You will build and own cross‑surface features spanning Live, Marketplace, Instant Rips, Collections, Topps, and future experiences.

The role emphasizes collaborating across backend, mobile, product, and design, delivering scalable, high‑performing services on AWS/Vercel, and driving end-to-end ownership from data model to production metrics.

Qualifications

• 5+ years of professional fullstack development experience with React, Next.js, TypeScript, and Python.

Responsibilities

• Design, build, and maintain fullstack features using Python, FastAPI, Next.js, React, and TypeScript.
• Build scalable, performant services on AWS and Vercel.
• Own features end to end: data model, API contract, front-end implementation, tests, rollout, and post-launch metrics.
• Maintain reusable front-end components, APIs, and libraries used by multiple apps.
• Collaborate with backend, mobile, product, and design teams to ensure winning experiences.
• Use feature flags with instrumentation and data-driven decisions.
• Mentor engineers through code reviews and pairing.

Skills

React

Next.js

TypeScript

Python

AWS

API design

Performance tuning

Testing discipline

Education

Bachelor's degree in Computer Science

Tools

Playwright

Jest

React Testing Library

Pytest

Storybook

Job description

Fanatics Collectibles is seeking a Senior Full Stack Engineer to unite multiple experiences into a shared surface architecture. You will build and own cross‑surface features spanning Live, Marketplace, Instant Rips, Collections, Topps, and future experiences.

The role emphasizes collaborating across backend, mobile, product, and design, delivering scalable, high‑performing services on AWS/Vercel, and driving end-to-end ownership from data model to production metrics.