Senior iOS Frontend SDK Engineer (Payments)

Quantum Technologies. LLC; San Leandro (CA); On-site; USD 120,000 - 160,000; Full time

Job summary

A leading technology firm in California is seeking an experienced iOS Developer to design and develop high-performance mobile SDKs for payment solutions. This role involves optimizing SDK components, ensuring security compliance, and collaborating with product and backend teams to create innovative payment experiences. The ideal candidate has over 10 years of iOS development experience, expert-level Swift skills, and a strong background in mobile security mechanisms. A Bachelor's or Master's degree in Computer Science is preferred, with responsibilities including technical support and documentation creation.

Qualifications

• 10+ years of iOS development experience.
• Expert-level proficiency in Swift; working knowledge of Objective-C.
• Strong experience designing and maintaining mobile SDKs/frameworks.
• Hands-on experience with security mechanisms, REST APIs, and memory management.
• Strong communication, documentation, and problem-solving abilities.

Responsibilities

• Design, develop, and maintain iOS Frontend SDKs using Swift and/or Objective-C.
• Integrate payment and authentication APIs for secure transactions.
• Optimize mobile SDK performance and ensure compliance with security standards.
• Develop automated tests and documentation for SDK reliability.
• Collaborate with product and engineering teams to define solutions.

Skills

iOS development experience

Swift proficiency

Objective-C knowledge

Mobile SDKs/frameworks experience

Mobile security mechanisms

Performance tuning

REST APIs experience

Strong communication skills

Detail-oriented

Education

Bachelor’s or Master’s in Computer Science

Tools

Xcode

Swift Package Manager

CocoaPods

Instruments

XCTest

Job description

A leading technology firm in California is seeking an experienced iOS Developer to design and develop high-performance mobile SDKs for payment solutions. This role involves optimizing SDK components, ensuring security compliance, and collaborating with product and backend teams to create innovative payment experiences. The ideal candidate has over 10 years of iOS development experience, expert-level Swift skills, and a strong background in mobile security mechanisms. A Bachelor's or Master's degree in Computer Science is preferred, with responsibilities including technical support and documentation creation.