Sr. Software Engineer, Frontend (Flutter/iOS)

About Binance.US: 

Binance.US is America’s home to buy, trade, and earn digital assets. As a licensed and regulated U.S. crypto platform, we provide secure, reliable access to more than 190 of the world’s most popular cryptocurrencies, all with some of the lowest fees in the industry. We’re a remote-first team of innovators building the bridge between traditional finance and Web3, helping bring financial freedom within reach for all. To learn more, visit www.binance.us. All roles supporting Binance.US are employed via BAM Management US Holdings Inc. or BAM Management Canada Holdings Inc.

About This Role:

The Sr. Software Engineer, Frontend (Flutter/iOS) is part of the Engineering team and reports to our Manager, Engineering. As Sr. Software Engineer, Frontend (Flutter/iOS), you will be responsible for supporting the transition of our mobile platform from native iOS and Android to a unified Flutter/Dart codebase. You will partner with Android engineers, backend engineers, designers, and product managers to deliver high-quality mobile solutions and ensure continuity and stability during the platform migration.

Core Responsibilities:

• Maintain, enhance, and support our production native iOS application written in Swift.

• Collaborate on the design and development of a new Flutter/Dart codebase, ensuring performance and scalability.

• Build cross-platform mobile features in partnership with Android engineers, backend developers, and product teams.

• Contribute to shared tooling, CI/CD pipelines, and deployment workflows.

• Uphold high engineering standards and best practices throughout the hybrid mobile migration.

• Troubleshoot and resolve integration, compatibility, and performance issues in both native and cross-platform stacks.

• Provide mentorship to fellow mobile engineers, especially on iOS and native integrations.

Preferred Skills/Experience:

• 5+ years of professional mobile development experience, including 3+ years of iOS development using Swift.

• At least 1-2 years of hands-on experience with Flutter/Dart or demonstrated ability to adopt new cross-platform technologies.

• Experience supporting production iOS apps through multiple OS cycles.

• Understanding of platform interoperability, including Flutter platform channels and native SDK integration.

• Proficiency in CI/CD and release workflows: Fastlane, App Store Connect, TestFlight.

• Familiarity with performance monitoring tools like Xcode Instruments, Flutter DevTools, and Firebase.

• Strong architectural judgment, especially in platform migrations or codebase rewrites.

• Bonus: Exposure to Android development (Kotlin) and full cross-platform transitions.

Salary:

The starting pay range for this role is between USD$200,000 to $220,000 per year for all U.S. remote locations. The actual base pay will vary, and is dependent upon many factors, such as transferable skill sets, work experience, business needs, and market demands. The base pay range is subject to change.

Our Mission:
At Binance.US, our mission is to create a more inclusive financial system through Web3 technologies. As a U.S. regulated crypto platform, we’re committed to earning trust through compliance and empowering people to do more with their money, bringing financial freedom within reach for all.

Our Values:
Our values shape how we work, make decisions, and support our users every day:

• Act with Integrity: We do what’s right, even when no one is watching.

• Be Collaborative: We work together with respect and transparency to achieve shared goals.

• Customers First: We listen to, advocate for, and prioritize our users in every decision we make.

• Do the Work: We take ownership, follow through, and deliver results that move the mission forward.

• Embrace Change: We stay adaptable and curious, thriving in a fast moving industry.

Our Benefits:

We believe in supporting our people with flexibility, balance, and opportunities to grow. One of the ways we demonstrate this commitment is through our benefit offerings.

• Time & Family: Unlimited PTO (for salaried FTE roles); 12 weeks fully paid Parental Bonding Leave.

• Well-Being: Mental wellness benefits; free 1:1 virtual visits with a licensed mental wellness professional; comprehensive competitive health benefits.

• Remote-First Culture: Fully remote, cameras-on culture with work-from-home equipment reimbursements available to new hires.

• Professional & Financial Growth: Annual professional development budget; free 1:1 virtual visits with a career coach; 401k plan with employer match.

BAM Management US Holdings Inc. and BAM Management Canada Holdings Inc. are Equal Opportunity Employers and comply with all applicable federal, state, and local fair employment practice laws. Our mission is to give our customers access to a broad array of digital assets, and we thrive because of the diverse and inclusive team that we are building. We do not discriminate against qualified employees, applicants, or any other covered persons because of race, color, religion, creed, gender identity, sex, sexual preference, sexual identity, pregnancy, national origin, ancestry, citizenship, age, veteran status, physical disability, mental disability, medical condition, military status, or any other applicable legally protected characteristic.

Depending on your location, data privacy laws may regulate the way we manage the data of job applicants. Our full notice outlining how data will be processed as part of the application procedure for applicable locations is available here. By submitting your application, you are agreeing to our use and processing of your data as required.

We comply with Federal Transparency in Coverage regulations by providing a link to machine readable files related to the health plans offered to our employees. The machine-readable files are formatted to allow researchers, regulators, and application developers to more easily access and analyze data including negotiated service rates, and out-of-network allowed amounts between health plans and healthcare providers.