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ION Group

Provides automated software platforms for trading

Senior iOS Engineer

Mobile EngineeringConfirmed live in the last 24 hours
Full-timeNew York, NY, USA$150k - $200k /yrIn-person

About the Job

Requirements

  • At least 8 years of experience designing and building complex, commercial-grade software systems.
  • Proficiency in Swift and experience with native iOS development tools such as SwiftUI, UIKit, SwiftData, and Swift Concurrency (async/await).
  • Experience in financial services.
  • Familiarity with integrating RESTful APIs and third-party libraries.
  • Experience with agile development methodologies.
  • Knowledge of continuous integration and continuous deployment (CI/CD) pipelines for mobile applications.
  • Understanding of mobile user interface and user experience principles and best practices to create intuitive and engaging user experiences.
  • Ability to communicate effectively with and influence technical and non-technical stakeholders.

Responsibilities

  • Develop and maintain robust iOS applications using Swift and SwiftUI or UIKit, ensuring optimal performance and responsiveness.
  • Collaborate with product managers, user interface and user experience designers, and backend developers to define, design, and ship new features.
  • Write clean, maintainable, and efficient code, adhering to best practices and architectural patterns such as model-view-viewmodel (MVVM).
  • Perform unit and integration testing to ensure application quality and stability.
  • Troubleshoot, debug, and optimize application performance.
  • Stay current with the latest mobile technologies, frameworks, and industry trends.
  • Work on-site in the World Trade Center area of New York City.

Desired Qualifications

  • Experience in consumer banking, including account management and onboarding.
  • Experience in fraud management, know your customer (KYC), anti-money laundering (AML), and regulatory reporting.
  • Experience using on-device biometrics for authentication.
  • A strong portfolio of released applications on the App Store.
  • Experience with AppConfig community standards and enterprise app distribution.
  • A college degree in Computer Science or a related field of study, or equivalent experience.
  • Use AI-assisted development tools such as Claude, Claude Code, or Copilot to improve team velocity and code quality, and help the team adopt them responsibly.

About the Company

ION Group

Provides automated software platforms for trading

ION Group delivers software platforms and APIs that automate trading, processing, and risk management for institutional clients in global financial markets. Its products connect to multiple trading venues and exchanges, enabling efficient, accurate transactions and streamlined operations. The company earns revenue from software licensing, subscriptions, and professional services, including customization and support. ION differentiates itself by expanding through acquisitions to stay agile and by offering integrated automation across trading, processing, and risk management, backed by a broad connectivity footprint. The goal is to help clients achieve greater efficiency and reduce operational risk in their financial workflows.

Company size
5,001-10,000
Company stage
Growth Equity (Venture Capital)
Total funding
$438.5M
Headquarters
London, United Kingdom
Founded
1998

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