Senior Mobile Developer – iOS

About Monstro

Monstro is the operating system for governed financial intelligence. We build governance and intelligence infrastructure that enables artificial intelligence to operate safely, explainably, and at institutional scale.

We exist because the level of financial guidance historically available to a small group should be accessible to many more people. By combining AI with deep institutional infrastructure, we help financial institutions deliver more personalized, responsible, and life-changing financial support to millions of individuals.

We’re building mission-critical systems in a highly regulated domain, and we care deeply about doing it right. If you’re motivated by meaningful problems, high standards, and shaping infrastructure that improves financial outcomes, you’ll feel at home here.

About the Role

We’re looking for an iOS Engineer to build the native iOS experience for our financial platform. You’ll design and deliver secure, high-performance features that help users understand and manage their financial lives, while laying the foundation for a long-term mobile architecture. This is a hands-on, collaborative role where your work will directly shape the core experience our users rely on every day.

Why This Role Matters

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.

What You’ll Do

iOS Application Development

Design, build, and maintain core features using Swift and modern iOS frameworks (SwiftUI, 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 TestFlight builds and deployment to the Apple App Store.

Architecture & Scalability

Establish scalable iOS application leveraging SwiftUI architectural patterns such as async/await and data flows. Optimize performance, responsiveness, offline/online behavior, and data persistence. Build for speed and correctness in a regulated environment.

Integration & Data Handling

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.

Security & Compliance

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.

Collaboration & Execution

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.

What Success Looks Like

• 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.

What We’re Looking For

• 5+ years of professional iOS development experience
• Strong proficiency with Swift and modern iOS development ((SwiftUI, UIKit, Combine, Swift Testing, Swift Data, async/await).
• Experience building and releasing production iOS applications
• Understanding of scalable iOS applications
• Experience integrating with RESTful APIs and managing complex data flows
• Strong grounding in secure data handling, encryption, and authentication
• Skilled in debugging, performance tuning, and optimizing for real-world usage
• Experience with multi-language support
• Clear communicator who thrives in a fast-paced environment
• Ownership mindset with a focus on quality, security, and reliability
• Experienced with CI/CD pipelines for iOS, including Apple’s CI/CD pipeline
• Genuine passion for the craft of building software and curiosity to keep learning
• Clear communicator who takes ownership and moves with urgency
• Experience with accessibility best practices is preferred 

Why Monstro?

• Ownership & Impact: Shape the future of AI-powered finance—building a category-defining product used by consumers and institutions around the world.
• Experienced Team: Join a leadership team with a track record of scaling companies from early stage to major exits.
• Principles-Driven Culture: Work in a culture that values speed, ownership, and impact—what most companies achieve in 90 days, we do in 45.
• Comprehensive Compensation Package: Competitive salary, performance bonuses, equity, and robust benefits package, including paid health, vision, dental, and disability coverage.

Compensation Range (New York City): $148,000-$186,000

*The posted range reflects the base salary for this role across the market ranges for each location. Final compensation will depend on a variety of factors, including experience, skills, internal leveling, and market conditions, and will be offered within the stated range in accordance with applicable pay transparency laws.

Ready to Build With Us?

If you’re excited to contribute to a high-bar team building something meaningful, we love to hear from you!