Senior Software Engineer, Full Stack (FES)

Fanatics Betting & Gaming; United States; On-site; USD 140,000 - 190,000; Full time

Job summary

Fanatics Betting & Gaming is seeking a Senior Software Engineer to design, build, and operate scalable Go services powering the Fan Ecosystem. You will own large technical surface areas end to end, set direction for multi-service initiatives, and mentor other engineers.

The role is hands-on with a backend emphasis, contributing to Go services and the TypeScript/React front ends that support them.

Qualifications

• 5+ years of professional software engineering experience building and operating production systems.
• Strong proficiency in Go (Golang) with experience in concurrency, error handling, testing, profiling, and performance tuning.
• Experience designing, building, and scaling backend services and APIs (REST and/or gRPC) in a distributed, microservices environment.
• Proven experience with JavaScript/TypeScript and React or similar front-end framework.

Responsibilities

• Design, build, test, document, and operate production-grade software with a focus on Go services and APIs.
• Own the technical design of medium-to-large features and systems from approach to completion.
• Mentor and grow engineers on the team and participate in design/architecture reviews.
• Improve reliability, performance, and cost of owned systems; define and track SLOs and operational metrics.
• Collaborate with product managers, designers, and stakeholders to shape the roadmap and technology decisions.

Skills

Go

Backend design

REST/gRPC

TypeScript

React

Distributed systems

Job description

About Us

Fanatics is building a leading global digital sports platform. We ignite the passions of global sports fans and maximize the presence and reach for our hundreds of sports partners globally by offering products and services across Fanatics Commerce, Fanatics Collectibles, and Fanatics Betting & Gaming, allowing sports fans to Buy, Collect, and Bet. Through the Fanatics platform, sports fans can buy licensed fan gear, jerseys, lifestyle and streetwear products, headwear, and hardgoods; collect physical and digital trading cards, sports memorabilia, and other digital assets; and bet as the company builds its Sportsbook and iGaming platform. Fanatics has an established database of over 100 million global sports fans; a global partner network with approximately 900 sports properties, including major national and international professional sports leagues, players associations, teams, colleges, college conferences and retail partners, 2,500 athletes and celebrities, and 200 exclusive athletes; and over 2,000 retail locations, including its Lids retail stores. Our more than 22,000 employees are committed to relentlessly enhancing the fan experience and delighting sports fans globally.

About the Team

Every time a fan places a bet, earns a reward, or checks out on Fanatics - Fanatics Core made that possible. We build the shared foundations - identity, payments, loyalty, wallet, data, and platform - that power sports betting, ecommerce, collectibles, and beyond. We supercharge the business by providing products and capabilities so that teams can focus on what matters most: building delightful experiences for the fans.

Fanatics is uniquely positioned at the intersection of sports commerce, betting, and collectibles, and Fanatics ONE is the loyalty and identity program that ties it all together. As part of the Loyalty SDK team at Fanatics, we build the technology that powers how fans see and interact with FanCash across the entire company. Our SDKs and services sit at the heart of the customer journey, enabling every brand and product team to deliver consistent and seamless loyalty experiences.

Overview

As a Senior Software Engineer at Fanatics, you will design, build, and operate the platforms and services that power the Fan Ecosystem - the systems that connect fans to every Fanatics product and experience. You will own significant technical surface area end to end, set the technical direction for projects that span multiple services and teams, and raise the engineering bar for those around you through mentorship, design leadership, and hands‑on delivery.

This is a hands‑on, full‑stack role with a backend center of gravity. The majority of your work will be building high‑throughput, high‑availability services in Go, with meaningful contributions to the TypeScript/React front ends those services support.

Responsibilities

• Design, build, test, document, and operate high‑quality, production‑grade software with a focus on Go services and APIs
• Own the technical design of medium‑to‑large features and systems: define the approach, weigh trade‑offs, document decisions, and drive them to completion
• Break down ambiguous problems into well‑scoped, deliverable work for yourself and other engineers on the team
• Lead and participate in design and architecture reviews; provide clear, constructive feedback that improves both the design and the designer
• Set the standard in code reviews - for correctness, readability, testability, and operational safety
• Mentor and grow engineers on the team; onboard new hires and act as a technical point of contact for your systems
• Participate in and improve the on‑call rotation: instrument your services, drive incident response, and lead blameless postmortems that result in real fixes
• Improve reliability, performance, and cost of the systems you own; define and act on SLOs and operational excellence metrics
• Identify and pay down technical debt, and make the case for the investments worth making
• Partner closely with product managers, designers, and stakeholders to shape the roadmap and make technology decisions that grow the business
• Influence and help define the principles, guidelines, and best practices of our engineering strategy - then hold the team to them
• Develop deep understanding of our industry, product, feature set, and roadmap, and use it to make better technical decisions

Required Qualifications

• 5+ years of professional software engineering experience building and operating production systems
• Strong, demonstrated proficiency in Go (Golang) - required. You have built and shipped production services in Go and can speak to concurrency patterns, error handling, testing, profiling, and performance tuning in the language
• Proven experience designing, building, and scaling backend services and APIs (REST and/or gRPC) in a distributed, microservices environment
• Demonstrated proficiency in JavaScript or TypeScript, and experience with React or another modern front-end f