Staff Mobile Engineer: Kotlin & Cross-Platform Architect

Fanatics; Leeds; On-site; GBP 90,000 - 130,000; Full time

Job summary

Fanatics Betting & Gaming is seeking a Staff Software Engineer – Mobile to lead Kotlin/Jetpack Compose mobile architecture and cross-platform strategy. You will influence KMM/Compose Multiplatform adoption, mentor engineers, and drive reliable, scalable mobile experiences for iCasino across Fanatics platforms.

You will partner with product, design, and backend teams to deliver high-quality user experiences, while owning incident response and developer tooling improvements.

Qualifications

• 8+ years of professional software engineering experience with mobile focus.
• Proven expertise in Kotlin and Jetpack Compose.
• Experience with Kotlin Multiplatform Mobile (KMM) and Compose Multiplatform.
• Strong understanding of mobile architecture, performance, and reliability.

Responsibilities

• Define and evolve the mobile architecture and cross-platform strategy, with a focus on scaling KMM and Compose Multiplatform across the organisation.
• Lead complex technical design and architectural decisions, balancing speed, scalability, maintainability, and user experience.
• Build and contribute to shared mobile platforms, libraries, and reusable components, enabling consistency and velocity across teams.
• Deliver high-impact features and platform improvements hands-on, particularly in Kotlin and Jetpack Compose.
• Drive adoption of best practices in mobile engineering, including modularisation, state management, testing, and performance optimisation.
• Partner closely with product managers, designers, and backend engineers to deliver intuitive, high-performance user experiences.
• Identify and execute on opportunities to reduce technical debt, improve system design, and enable faster iteration across teams.
• Own and improve developer experience, including tooling, CI/CD pipelines, and release processes.
• Define and influence mobile observability, performance monitoring, and reliability standards.
• Play a key role in incident response and on-call practices, helping improve production stability and response effectiveness.
• Mentor and guide engineers across teams, contributing to a strong culture of technical excellence and continuous learning.
• Influence engineering direction across squads, aligning teams to a cohesive mobile platform vision.
• Contribute to hiring, onboarding, and raising the technical bar across the organisation.
• Develop a deep understanding of the iCasino product, customer segments, and how we deliver entertainment-first experiences at scale.
• Be open to occasional travel to Fanatics offices and events for planning, collaboration, and team-building activities.

Skills

Kotlin

Jetpack Compose

KMM

Compose Multiplatform

Mobile architecture

Incident ownership

Technical leadership

Job description

Fanatics Betting & Gaming is seeking a Staff Software Engineer – Mobile to lead Kotlin/Jetpack Compose mobile architecture and cross-platform strategy. You will influence KMM/Compose Multiplatform adoption, mentor engineers, and drive reliable, scalable mobile experiences for iCasino across Fanatics platforms.

You will partner with product, design, and backend teams to deliver high-quality user experiences, while owning incident response and developer tooling improvements.