Senior Mobile Engineer — Flutter & End-to-End Apps

Kalshi; United States; On-site; USD 180,000 - 250,000; Full time

Job summary

Kalshi is hiring a highly execution-oriented Mobile Engineer to own and scale Kalshi’s mobile application experience on Flutter. You’ll design, build, test, and ship core features end to end with focus on performance and reliability.

You will collaborate with product and design, own app architecture, manage state, and integrate with backend APIs. This role includes mentoring teammates as the platform grows, delivering exceptional user experiences.

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 architecture

State management

API integration

Ownership mindset

Collaboration

Tools

React

React Native

Job description

Kalshi is hiring a highly execution-oriented Mobile Engineer to own and scale Kalshi’s mobile application experience on Flutter. You’ll design, build, test, and ship core features end to end with focus on performance and reliability.

You will collaborate with product and design, own app architecture, manage state, and integrate with backend APIs. This role includes mentoring teammates as the platform grows, delivering exceptional user experiences.