Senior Flutter Mobile Engineer — End-to-End Ownership

Kalshi; New York (NY); 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

What is Kalshi?

Kalshi has defined a new category: prediction markets. Kalshi allows people to trade on the outcome of any events and turn any question about the future into a financial asset. Kalshi fought for years and legalized prediction markets in the US for the first time in history, is currently the fastest growing financial market in America, and has thousands of markets across politics, economics, financials, weather, tech, AI, culture and more.

We believe prediction markets have the potential to be the largest financial market because they turn anything into a financial position.

• Our vision: well… build the largest financial market on the planet.

• Our mission: bring more truth to the world through the power of markets.

Our culture is simple: we hire really talented people, work really hard, and enjoy the climb. We are looking for ambitious and exceptional people to join our (relatively small) team to help us build the next generation of financial markets.

Role Roadmap

We’re looking for a highly execution-oriented Mobile Engineer to own and scale Kalshi’s mobile application experience. This role is responsible for building the core trading and user-facing platform on mobile, with clear ownership over feature delivery, performance, and long-term technical direction.

You’ll be a primary operator on our mobile stack — designing, building, shipping, and owning production-grade mobile features end to end. As Kalshi scales, this role will grow in scope and impact, with increasing influence over architecture, reliability, and team development. Success in this role comes from strong technical judgment, comfort owning complex systems, and a bias toward shipping high-quality user experiences quickly

What You'll Do

• 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

What You Bring

• 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

Bonus:

• Experience with React or React Native

NYC Pay Transparency Disclosure

Base Salary Range: $180,000–$250,000
This range reflects current market data for this role. Kalshi has minimal hierarchy and broad variance in experience levels within each title; if your compensation expectations exceed this range, we encourage you to reach out — we’re always happy to discuss.

Our Culture

Meritocracy is at our core, and we value people who take ownership and figure (usually hard) things out. We dream big. We love our craft deeply and are proud of what we put out in the world. We are committed to our vision of building something big… but also useful: a product that brings more truth through the power of markets.

Kalshians are Kalshi’s most important asset: we pick Kalshians carefully, so we trust them fully on day 1.

Commitment to Equal Opportunity

Kalshi is committed to creating a culture of inclusion and belonging, and we are proud to be an equal opportunity employer. We believe it is our collective responsibility to uphold these values and encourage candidates from all backgrounds to join us in our mission. All qualified applicants will be treated with respect and receive equal consideration for employment without regard to race, color, creed, religion, sex, gender identity, sexual orientation, national origin, disability, uniform service, veteran status, age, or any other protected characteristic per federal, state, or local law. If you are passionate about what you do and want to use your talents to support our mission and values, we’d love to hear from you.