Engineer III - Multiplatform Engineer (iOS)

Fanatics Inc•New York, NY

63d

About The Position

At Fanatics Betting & Gaming (FBG), a core division of Fanatics' mission to establish the ultimate end-to-end digital sports platform, we're crafting a world where every aspect of a sports fan's passion is catered to. On the engineering side, we're pioneering the use of AI as a code collaborator. We need engineers who have gone beyond experimentation-who actively use Claude Code, Cursor, GitHub Copilot, or similar tools to ship production code faster while maintaining exceptional quality standards. If you have strong opinions about AI-augmented development workflows backed by real experience, we want to talk with you. This Engineer III - Multiplatform (iOS) role entrusts you with significant ownership over the development and optimization of both the Kotlin Multiplatform iOS interop & also building your multiplatform skillset within Kotlin Multiplatform. You'll lead by example, establishing best practices for AI-assisted development while building systems that handle millions of events daily.

Requirements

5+ years of iOS development experience
Demonstrated proficiency coding in Swift & SwiftUI
The bulk of our business logic & ux relies on Kotlin Multiplatform (KM) & Compose Multiplatform (CMP). You should be comfortable learning and developing within this architecture while continuing to grow own our iOS interoperability with KM & CMP
Extensive knowledge of building out versioned Swift Packages to help build out our packages that interop with CMP & KM
Experience with CI/CD pipelines, and automated release processes.
Demonstrated experience using AI tools (Claude Code, Cursor, Copilot, etc.) to ship production code
Has developed personal strategies for validating AI-generated code and identifying common pitfalls
Can compare at least 2-3 AI tools with concrete pros/cons from actual usage
Track record of introducing tools or processes that measurably improved team velocity
Can write clear technical documentation and present architecture decisions to non-technical stakeholders
Team-first mentality with willingness to jump in wherever needed
Actively experiments with and optimizes personal development workflow
Strong written and verbal communication skills
Self-directed problem solver who thrives in ambiguous situations

Nice To Haves

Experience in sports betting industry or genuine interest in sports
Previous experience in high-growth startup environments
Exposure to Swift & iOS development frameworks
Experience with Kotlin Multiplatform (KM)
Contributions to open-source projects or technical community
Background in building developer tools or improving engineering productivity
Experience leading without authority and influencing technical direction across teams

Responsibilities

Continuously build & maintain the iOS packages that support Kotlin Multiplatform & Compose Multiplatform alongside colleagues within a shared library framework
Ensure our iOS performance when building Compose Multiplatform maintains the write SLA's.
Remove bottlenecks and make technical and design approach trade-off decisions short term vs long-term
Contribute to team planning and design discussions, building more expertise around design approaches, driving best practices and improving the speed of delivery
Leverage AI tools to accelerate development velocity while maintaining code quality standards
Establish and document team standards for AI tool usage (prompt patterns, code review checklists, validation strategies)
Measure and report on AI tool ROI through concrete metrics (PR velocity, bug rates, test coverage)
Identify and prevent common AI-generated code pitfalls (over-abstraction, missing edge cases, security vulnerabilities)