Senior Software Engineer – React, React Native

FanDuel

Senior Software Engineer enhancing core React Native for FanDuel's Sportsbook. Collaborating with engineers to improve performance, reliability, and development experience.

Posted 4/13/2026full-timeEdinburgh • 🇬🇧 United KingdomSeniorWebsite

Tech Stack

Tools & technologies

AndroidiOSJavaJavaScriptKotlinReactReact NativeSwiftTypeScript

About the role

Key responsibilities & impact

Enhancing the core React Native codebase for the Sportsbook app, focusing on performance, scalability, and maintainability
Profiling and optimising app startup and runtime performance across the React Native stack (rendering, bundle size, memory, JS/native thread work, etc.)
Building and maintaining shared frameworks, tooling, libraries, and components that support feature teams
Improving developer experience through better tooling, documentation, templates, CI reliability, and build performance
Contributing to technical design discussions and leading multi-phase improvements, breaking work into incremental, testable deliveries aligned with team priorities
Supporting continuous improvement initiatives that raise quality, reduce toil, and improve operational readiness within the domain
Joining our on-call rota, sharing out of hours support duties as part of our incident response process

Requirements

What you’ll need

Significant experience delivering production React Native applications (OR strong React skills with interest in mobile development)
Strong TypeScript skills and a solid understanding of React patterns, architecture, and maintainable code practices at scale
Practical experience profiling and improving performance in React Native applications (startup time, rendering, responsiveness, memory, etc.)
Experience with React Native native modules / bridging; native Android (Kotlin/Java) and/or iOS (Swift) experience is a plus
Familiarity with mobile development best practices, testing strategies, and CI/CD pipelines
Experience working in Agile teams and contributing to collaborative technical standards
A quality-focused mindset with strong problem-solving skills and the ability to evaluate trade-offs in ambiguous situations.

Benefits

Comp & perks

Opportunities for learning & growth
Mentoring and coaching from experienced engineers

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

React NativeTypeScriptKotlinJavaSwiftperformance profilingmobile developmentCI/CDAgiletestable code practices

Soft Skills

problem-solvingcollaborationquality-focused mindsetcommunicationleadershiporganizational skillsincremental deliverycontinuous improvementdeveloper experience enhancementtechnical design discussions