Senior iOS SDK Engineer — Secure Payments (HCE, Hybrid Paris)

IDEMIA; Paris; Hybrid; EUR 90,000 - 120,000; Full time

Job summary

IDEMIA Secure Transactions, a division of IDEMIA Group, is the leading technology provider focusing on safer payments and connections. We are seeking a Senior Developer to join our SDK development team in Paris to enable contactless transactions on iOS devices.

You will design and implement HCE contactless payment functionality, optimize Kotlin Multiplatform performance, and contribute to security audits and documentation in a collaborative Scrum environment.

Qualifications

• Experience in working with iOS SDKs, preferably with payments/fintech solutions.
• Experience with Kotlin Multiplatform would be an asset.
• Knowledge of iOS 17.4 minimumOS version.
• GenAI-assisted development with tools like GitHub Copilot CLI to create Skills, Specs and MCP Servers.
• Fluent in English and French for team and stakeholder communication.

Responsibilities

• Design and implementation of HCE contactless payment functionality.
• Knowledge of Kotlin Multiplatform SDK performance and security optimization.
• Knowledge of cryptography.
• Participation in scrum meetings.
• Preparatory work for security audits and functional audits.
• Preparation of technical documentation.
• Collaboration with external teams and clients during implementations.
• Resolving customer production issues.
• Participation in code reviews.

Skills

Swift

Kotlin Multiplatform

Cryptography

Multilingual comms

Education

Bachelor’s or Master’s degree in Computer Science or related field

Tools

Git

Swift Package Manager

Jenkins

CI/CD

Job description

IDEMIA Secure Transactions, a division of IDEMIA Group, is the leading technology provider focusing on safer payments and connections. We are seeking a Senior Developer to join our SDK development team in Paris to enable contactless transactions on iOS devices.

You will design and implement HCE contactless payment functionality, optimize Kotlin Multiplatform performance, and contribute to security audits and documentation in a collaborative Scrum environment.