Senior Mobile Engineer - Fanatics Markets

About the Team

Fanatics Markets is the real-money prediction and trading app where you can invest in moments you care about. Built on a secure platform, we let users predict real-world outcomes and trade on events they actually follow — from sports and entertainment to political elections and beyond. Our mission is to redefine how fans engage with the moments and markets that matter most. We're looking for the right people to help us build the future of prediction markets.

Overview

As a Senior Mobile Engineer, you'll contribute to a multi-platform app built on Kotlin Multiplatform, shipping features across Android, iOS, and additional targets from a shared codebase. You'll own complex work end-to-end, write code that sets the quality bar for the team, and help shape architecture decisions in a fast-moving product environment. Our engineering strategy centers on KMP and Compose Multiplatform to deliver high-quality, consistent experiences across platforms — and the engineers who build it are expected to help keep that bar high.

Responsibilities

• Build and ship production-quality features across Android and shared KMP layers, taking ownership from design through deployment with minimal oversight
• Implement features across core product domains — connecting Compose Multiplatform UI to shared business logic through clean MVI state management
• Contribute to a layered, multi-module architecture, respecting module boundaries and shared platform contracts
• Partner with shared platform teams to implement against declared interfaces, keeping app-specific logic cleanly separated from shared platform concerns
• Collaborate with product, design, and QA to deliver reliable, pixel-accurate experiences across multiple platform targets
• Write testable, well-structured Kotlin leveraging coroutines, flows, KSP-based codegen, and dependency injection patterns consistent with the team's standards
• Conduct thorough code reviews, maintaining module boundary discipline and build system conventions
• Participate in the on-call rotation, helping diagnose and resolve issues across platforms
• Mentor junior engineers and contribute to a culture of continuous learning on the team

Experience and Skills

• 5+ years of experience building scalable, consumer-facing Android applications with strong command of MVI architecture
• Strong Kotlin proficiency — coroutines, flows, idioms, and best practices — with the ability to apply and share these effectively across the team
• Experience with Kotlin Multiplatform — comfortable developing and scaling shared business logic in a multi-module KMP codebase
• Hands-on experience with Compose or Compose Multiplatform, building design-system-compliant UI across platform targets
• Proficiency in Gradle multi-module projects, including convention plugins and dependency management
• Experience with CI/CD pipelines and automated mobile testing practices
• Comfortable working across shared platform and library boundaries — implementing against declared interfaces without leaking platform-specific logic into shared modules
• Clear communicator able to articulate technical decisions to peers, product, and design stakeholders
• Agile/SCRUM experience with a track record of consistent, quality delivery
• Team-first mentality with a drive to raise the bar continuously

Bonus

• Compose Multiplatform experience across Android, iOS, desktop, and wasm targets
• Experience with KSP-based codegen and Koin or similar DI in a KMP environment
• Familiarity with feature flag systems and mobile observability tooling
• Experience with backend services, distributed systems and event-driven architectures

Depending on the role, your interview and onboarding experience may include in-person components, such as onsite interviews or Launching into Better: LIVE—a multi-day cultural immersion in New York City for full-time, non-seasonal hires. These sessions are designed to build connection and bring our culture to life, though specific travel and participation requirements will be confirmed based on your role and location. Your recruiter will provide clear guidance at each stage of the process.

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