Senior Staff Engineer - Mobile, Fanatics Markets

About Fanatics Markets

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.

Role Overview 

As a Senior Staff Mobile Engineer, you’ll be responsible for powering the rapidly growing Fanatics Markets app. In your role, you'll be recognized as a technical leader, combining strategic thinking with hands-on execution. You'll lead ambitious projects, setting the standard for your team through innovative solutions. Your bold decisions will strike the right balance between addressing immediate business needs and ensuring long-term technical excellence. Through your leadership, you’ll foster a culture of excellence and innovation, leaving a lasting impact on both your immediate team and the broader mobile development community.

We embrace principles of data-driven development, operational excellence, and continuous process optimization to deliver a stable, scalable platform. Central to our strategy is Kotlin Multiplatform, which empowers us to deliver high-quality features quickly and consistently across multiple ecosystems. By focusing on object-oriented design, modern coding practices, open-source frameworks, and third-party platform integrations, we continuously innovate and deliver at speed in this exciting and fast-moving market. 

Responsibilities

• Own the multiplatform engineering strategy — lead architecture, development, testing, and deployment of high-quality, scalable software across Android and shared Kotlin Multiplatform (KMP) layers, setting the technical direction for the team and broader organization
• Develop a deep understanding of the industry, product, and roadmap, translating that knowledge into team strategy, cross-team influence, and long-term technical vision
• Lead end-to-end technical execution of complex, multi-quarter features and systems from ideation and architecture through deployment and continuous refinement, across multiple platforms
• Define and enforce engineering principles, guidelines, and best practices across Android and KMP surfaces, raising the bar for the entire mobile organization
• Partner with the client platform team to define and grow shared client standards, best practices, and a unified UI experience library that scales across platforms and the organization
• Drive high-impact technical decisions in close partnership with product, design, and senior stakeholders — balancing immediate business goals with long-term scalability across platforms
• Steer team planning and design discussions, introducing multiplatform-first approaches to solve technical challenges and optimize design patterns organization-wide
• Champion improvements to software quality, testability, operational metrics, and team documentation, holding the organization to a higher standard
• Mentor and grow engineering talent at all levels, fostering a culture of continuous learning and providing technical coaching that compounds across the team and organization
• Lead incident resolution as part of the on-call rotation, ensuring swift diagnosis and remediation of critical issues across platforms, while proactively removing roadblocks to maintain momentum on complex, multi-team projects
• Conduct and model rigorous code reviews, sharing expertise to improve quality and elevate standards across the codebase

Qualifications

• 10+ years of experience building highly scalable Android applications, with a strong track record of sr. staff-level technical leadership and cross-platform ownership
• Expert-level Kotlin — deep mastery of coroutines, flows, language idioms, and best practices; proven ability to drive standards and mentor engineers at all levels in its effective use
• Kotlin Multiplatform (KMP) fluency — the bulk of our business logic strategy is built on KMP; you bring hands-on experience developing and scaling shared business logic within this ecosystem and can lead others in doing the same
• Multiplatform architecture expertise — strong command of MVI and other reactive architecture patterns, with the ability to apply them consistently across Android and shared KMP layers
• Strong reactive and async programming skills — deep experience with reactive programming patterns and asynchronous data processing at scale
• Gradle and build system proficiency, including multi-module projects, custom plugins, and dependency management in large codebases
• Experience with CI/CD pipelines, SDK versioning strategies, and automated release management for mobile applications and libraries
• Hands-on experience with Jetpack Compose and modern Material Design, with deep knowledge of Android platform best practices, trends, and end-user considerations
• Excels at conveying complex technical concepts clearly to diverse audiences, from engineers to executives and non-technical stakeholders
• Proven track record of driving Agile/SCRUM process improvements and delivery excellence across teams in fast-moving, large-scale enterprise environments
• Team-first mentality with the drive to raise the bar continuously

Strong Desired

• Compose Multiplatform experience — building shared UI across Android and other targets
• Swift / iOS development exposure — ability to navigate and contribute to cross-platform conversations with iOS counterparts
• Experience designing and building backend services with Spring Boot or similar Java frameworks
• Familiarity with large-scale distributed systems and event-driven architectures

Salary Range: $204,250 – $268,750 USD per year

The base salary for this role is based on job-related knowledge, skills, and experience and may vary depending on the successful candidate’s geographic location. Remote employees may also be eligible for a home office setup stipend. For information about our benefits, please visit https://benefitsatfanatics.com/

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.