Software Engineer, Mobile

• Own the development and evolution of Kalshi’s mobile application, with responsibility for quality, performance, and user experience
• Design, build, test, and ship customer-facing mobile features end to end
• Build and maintain a production-grade mobile application using Flutter, including core platform features like notifications and biometric authentication
• Collaborate closely with product and design partners to translate business and user needs into thoughtful technical solutions
• Architect user interfaces, manage application state, and integrate cleanly with backend APIs
• Make and execute on software architecture decisions that support long-term scalability and reliability
• Operate with a strong sense of ownership over deployment, maintenance, and ongoing improvement of the mobile app
• Mentor and support other mobile engineers as the team grows, helping establish strong engineering practices and standards

• 5+ years of industry experience building customer-facing software
• Strong mastery of Flutter and experience shipping production-grade mobile applications
• Hands-on experience with core mobile features such as push notifications, biometric authentication, and device-level integrations
• Strong technical fundamentals in application architecture, state management, and API-driven systems
• Ability to own work end to end, from design and implementation through testing and deployment
• Comfort operating in a fast-paced, scaling environment with evolving requirements
• Strong collaboration skills and a product-oriented mindset
• A bias toward execution, code quality, and delivering exceptional user experiences

Experience with React or React Native