Senior Software Engineer, Full Stack (FES)

fanaticsinc; United States; Remote; USD 122,000 - 200,000; Full time

Job summary

Fanatics Inc. is seeking a hands-on backend engineer to design, build, and operate high-throughput services with a backend focus and full-stack exposure. You will own significant technical surface area across production systems used by multiple consumer products.

The role emphasizes Go-based services, REST/gRPC APIs, and frontend collaboration using JavaScript/TypeScript with React. Strong skills in cloud platforms, databases, and observability are essential, with on-call duties and mentorship

Qualifications

• 5+ years of professional software engineering on production systems.
• Strong proficiency in Go with concurrency and performance tuning.
• Experience building scalable backend services in microservices.

Responsibilities

• Design, build, and operate production-grade services and APIs in Go.
• Lead technical design for medium and large features and drive delivery.
• Mentor engineers and participate in on-call incident response.
• Improve reliability and cost efficiency of owned systems.
• Drive architectural reviews and code quality improvements.
• Identify tech debt and align with product roadmap.

Skills

Go

Distributed systems

REST/gRPC

JavaScript/TypeScript

React

Databases

Cloud platforms

CI/CD IaC

Job description

Role overview

Join a core platform team that builds the shared foundations powering multiple consumer products. The work centers on high-throughput, high-availability backend services, with meaningful contributions to the web front-ends those services support. It's a hands-on full-stack position with a backend center of gravity, suited to someone who wants to own significant technical surface area end to end.

Responsibilities

• Design, build, and operate production-grade services and APIs, primarily in Go
• Lead technical design for medium and large features: define approach, weigh trade-offs, document decisions, and drive delivery
• Break ambiguous problems into well-scoped work for yourself and other engineers
• Run design and architecture reviews, and raise the bar in code review for correctness, readability, and operational safety
• Mentor engineers, onboard new hires, and serve as a technical point of contact for owned systems
• Participate in on-call rotations, drive incident response, and lead blameless postmortems
• Improve reliability, performance, and cost of owned systems against defined SLOs
• Identify and pay down technical debt, partnering with product, design, and stakeholders on roadmap decisions

Requirements

• 5+ years of professional software engineering experience on production systems
• Strong demonstrated proficiency in Go (Golang), including 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
• Proficiency in JavaScript or TypeScript with React or another modern front-end framework
• Solid grounding in relational and/or NoSQL databases, caching, and event streaming (e.g. Kafka, SQS/SNS)
• Experience with cloud infrastructure (AWS, GCP, or Azure), containers, CI/CD, and infrastructure-as-code, plus strong operational instincts for observability and debugging under pressure

Nice to have

• Experience with identity and access management (authentication, authorization, SSO, OAuth 2.0, OIDC, SAML, JWT, MFA)
• Familiarity with CIAM platforms such as Okta, Auth0, ForgeRock, AWS Cognito, or Ping
• Background in account security, fraud prevention, PII handling, or compliance-driven engineering (KYC, GDPR, CCPA)
• Build or integration experience for high-traffic, event-driven consumer products or shared platform services

Benefits and work setup

• Base salary range of $121,600 to $200,000 USD, depending on location, experience, and qualifications