ION · 1 day ago
Senior iOS Engineer, New York
New York, United States
Full-time
Onsite
Senior Level
$150K/yr - $170K/yrION is a specialist strategy, design, and technology consulting company dedicated to the financial services industry. They are seeking a Senior iOS Engineer who will play a critical role in developing and maintaining robust iOS applications, collaborating with various teams to design innovative solutions for clients.
AccountingFinanceSoftwareAsset ManagementFinancial Services
Responsibilities
Develop and maintain robust ios applications using Swift and SwiftUl/UIKit, ensuring optimal performance and responsiveness
Build and deploy cross-platform mobile applications for iOS (and Android using the Flutter framework and Dart programming language, leveraging a single codebase
Collaborate with product managers, UIVUX designers, and backend developers to define, design, and ship new features
Write clean, maintainable, and efficient code, adhering to best practices and architectural patterns (e.g., MVVM)
Develop and maintain robust and scalable iOS applications using Swift and Apple's development ecosystem
Perform unit and integration testing to ensure application quality and stability
Troubleshoot, debug, and optimize application performance
Stay up-to-date with the latest mobile technologies, frameworks, and industry trends
Qualification
Required
Proficiency in Swift and experience with native iOS development tools such as Xcode, SwiftUl, and UIkit
Strong command of the Flutter framework and Dart programming language for building cross-platform applications
Experience with state management solutions in Flutter (e.g., Provider, BLOC, Riverpod)
Familiarity with integrating RESTful APIs and third-party libraries
Understanding of mobile UI/UX principles and best practices to create intuitive and engaging user experiences
Experience with version control systems, particularly Git
Preferred
A strong portfolio of released applications on the App Store
Experience with agile development methodologies
Knowledge of continuous integration and continuous deployment (CI/CD) pipelines for mobile applications
Benefits
Discretionary bonus
Paid holidays
401(k)
Comprehensive medical, dental, and vision coverage
Life insurance
Short and long-term disability
Commuter FSA
Family Building Benefits
Company
ION
ION Group provides solutions for electronic trading, position management, pricing, risk management, and downstream processing for clients.
Founded in 1998
10001+ employees
H1B Sponsorship
ION has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (2)
2024 (1)
2022 (2)
2021 (4)
Funding
Current Stage
Late StageLeadership Team
Rich Grossi
Chief Executive Officer, ION Corporates
Sandra Timmoney
Chief of Staff to the CEO, Corporates
Recent News
2025-12-19
2025-12-04
2025-12-03
Company data provided by crunchbase