Senior Flutter Mobile Engineer — End-to-End Ownership

Kalshi; New York, Northern (NY, KY); Hybrid; USD 180,000 - 250,000; Full time

Job summary

Kalshi, based in New York, is seeking a highly execution-oriented Mobile Engineer to own and scale Kalshi’s mobile application experience. You’ll design, build, ship, and own production-grade features end to end on Flutter, with a focus on notifications and biometric authentication.

You will collaborate with product and design teams to translate business needs into robust engineering solutions, drive architecture decisions for long-term scalability, and mentor other mobile engineers as the team

Qualifications

• 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.

Responsibilities

• 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

Skills

Flutter

Mobile app development

Push notifications

Biometric authentication

API-driven systems

Code quality

React/React Native

Job description

Kalshi, based in New York, is seeking a highly execution-oriented Mobile Engineer to own and scale Kalshi’s mobile application experience. You’ll design, build, ship, and own production-grade features end to end on Flutter, with a focus on notifications and biometric authentication.

You will collaborate with product and design teams to translate business needs into robust engineering solutions, drive architecture decisions for long-term scalability, and mentor other mobile engineers as the team