Mobile Developer – iOS

Monstro

Mobile Developer – iOS at Monstro building native iOS applications for a financial platform. Designing secure, high-performance features for users to manage their financial lives.

Posted 6/9/2026full-timeNew York City • New York • 🇺🇸 United StatesMid-LevelSenior💰 $148,000 - $186,000 per yearWebsite

Tech Stack

Tools & technologies

iOSSwift

About the role

Key responsibilities & impact

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
Establish scalable iOS application leveraging SwiftUI architectural patterns such as async/await and data flows
Optimize performance, responsiveness, offline/online behavior, and data persistence
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

Requirements

What you’ll need

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

Benefits

Comp & perks

Competitive salary
performance bonuses
equity
paid health
vision
dental
disability coverage

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

SwiftSwiftUIUIKitCombineSwift TestingSwift Dataasync/awaitRESTful APIsdebuggingperformance tuning

Soft Skills

clear communicatorownership mindsetfocus on qualityfocus on securityfocus on reliabilitycuriosity to keep learningability to thrive in fast-paced environmentcollaborationcontribution to architectural discussionsattention to detail