Mobile Engineer – iOS

Monstro is an AI-native fintech platform reimagining how people and institutions manage money. We’re building a modern foundation for financial decision‑making—combining intelligence, automation, and elegant design to help users make smarter choices with confidence. Our team includes experienced builders from leading fintech, wealth management, and technology companies, united by a shared goal: to create a category‑defining product that transforms how financial insight is delivered and acted on.

We’re looking for a seasoned Staff level iOS Engineer to join our founding team and lead and evolve the native iOS experience for our financial platform. In this role, you’ll define the technical direction of our iOS architecture while remaining deeply hands‑on, designing and delivering secure, high‑performance systems that help users understand and manage their financial lives. You’ll partner closely with product, design, and backend teams to solve complex problems, scale the mobile platform, and set standards that ensure long‑term quality, reliability, and developer velocity.

Your work will have a lasting impact on the core experience our users depend on every day.

Monstro’s mobile app is central to how users interact with their financial universe. Your work will define the quality, responsiveness, and trustworthiness of that experience. The systems you build must be secure, elegant, and resilient—handling sensitive financial data at scale while remaining intuitive and reliable.

Design, build, and maintain core features using Swift and modern iOS frameworks (Swift

UI, UIKit, Combine, Swift Testing, Swift Data). Deliver smooth, intuitive user experiences that support complex financial workflows. Own feature development end‑to‑end—from architecture to implementation, testing, and release, including Test Flight builds and deployment to the Apple App Store.

Establish scalable iOS application leveraging Swift

UI architectural patterns such as async/await and data flows. Optimize performance, responsiveness, offline/online behavior, and data persistence. Build speed and correctness in a regulated environment.

Integrate the mobile client with backend APIs, financial data systems, and third‑party providers. Work closely with backend engineers to shape efficient API interactions and ensure seamless real‑time data flows within the app.

Implement secure data handling practices required for financial applications. Ensure proper encryption, secure storage, authentication flows, and session management. Build with the rigor necessary for regulated, high‑trust environments.

Partner with product managers, designers, and fellow engineers to deliver cohesive, user‑centered features. Contribute to architectural discussions, planning, and code reviews. Support engineering excellence through documentation, testing, and raising the overall technical bar.

• The iOS experience is fast, secure, and delivers exceptional clarity for users managing complex financial information.
• The mobile codebase is maintainable and scalable, supporting rapid iteration without sacrificing quality.
• Architecture patterns are consistent, well‑documented, and trusted across the engineering org.
• The app consistently meets performance and security standards suitable for a regulated financial environment.
• You’ve elevated the craft, practices, and expectations of mobile engineering at Monstro through thoughtful execution and collaboration.

• 10+ years of professional iOS development experience, with a sustained track record of delivering high‑impact mobile products at scale.
• Recognized expert in Swift and modern iOS development, with deep, hands‑on mastery of Swift
  
  UI, UIKit, Combine, Swift Data, async/await, and modern testing strategies—and the ability to set standards around their use.
• Extensive experience building, shipping, and evolving production iOS applications, including long‑term ownership of mission‑critical systems, core app architecture, or multiple major product surfaces.
• Proven ability to define, evolve, and steward scalable iOS…