Senior iOS Developer

ITCAN Pte Limited; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

ITCAN Pte Limited seeks an experienced Senior iOS Developer to design, develop, and maintain secure, scalable mobile applications for enterprise use. The role emphasizes secure coding, data protection (Keychain), secure networking, and authentication using OAuth 2.0, OIDC, SAML 2.0, and JWT, collaborating with backend, security, QA, and product teams to deliver reliable mobile solutions.

Stay current with iOS technologies and security best practices, mentoring junior engineers and contributing

Qualifications

• Bachelor's degree in CS/SE/IT or equivalent experience.
• Hands-on iOS development using Swift and iOS SDK.
• Strong understanding of iOS architecture, patterns, and software engineering principles.
• Experience designing secure, scalable mobile applications.
• Knowledge of Keychain and local storage protection.
• Experience with secure mobile networking (HTTPS, TLS, certificate validation).
• Understanding OWASP Mobile Security principles and vulnerabilities.
• Experience implementing OAuth 2.0, OIDC, SAML 2.0, and JWT.
• Experience integrating RESTful APIs and handling sensitive data.
• Strong debugging, analytical, and problem-solving skills; proficient with Git.

Responsibilities

• Design, develop, test, and maintain secure, high-performance iOS applications.
• Architect scalable mobile client solutions for enterprise use.
• Apply secure coding practices throughout the development lifecycle.
• Implement data protection (Keychain, local storage) and secure networking.
• Develop secure mobile networking with HTTPS/TLS and proper validation.
• Implement authentication/authorization using OAuth 2.0, OIDC, SAML 2.0, JWT.
• Follow OWASP MAS principles to prevent vulnerabilities.
• Conduct code reviews, security assessments, and performance optimization.
• Identify and resolve defects, memory leaks, and bottlenecks.
• Collaborate with backend, security, QA, product teams to deliver secure solutions.
• Integrate with RESTful APIs and backend services securely.
• Ensure quality via unit/integration testing and automation.
• Stay updated on iOS tech and security threats; mentor juniors.

Skills

Swift

iOS SDK

Architectural patterns

Secure coding

RESTful APIs

Auth protocols

OWASP MAS

Code reviews

Team collaboration

Testing

Education

Bachelor's degree in Computer Science/Software Engineering/Information Technology

Tools

Git

Job description

Job Summary

We are seeking an experienced Senior iOS Developer to design, develop, and maintain secure, scalable, and high-performance mobile applications. The ideal candidate will have strong expertise in iOS application development, mobile architecture, application security, and secure networking.

Responsibilities

• Design, develop, test, and maintain secure and high-performance iOS applications to meet business requirements
• Architect and implement robust, scalable, and maintainable mobile client solutions for enterprise use
• Apply secure coding practices throughout the mobile application development lifecycle to prevent vulnerabilities
• Implement secure data persistence, encryption, and sensitive data protection mechanisms such as Keychain and local storage safeguards
• Develop secure mobile networking solutions using HTTPS, TLS, certificate validation, and relevant security protocols
• Implement authentication and authorization mechanisms using OAuth 2.0, OpenID Connect (OIDC), SAML 2.0, and JSON Web Tokens (JWT) to ensure secure user access
• Apply OWASP Mobile Application Security (MAS) principles to identify, prevent, and mitigate mobile application vulnerabilities
• Conduct code reviews, security assessments, and performance optimization to improve application quality and security
• Identify and resolve application defects, security vulnerabilities, memory leaks, and performance bottlenecks
• Collaborate with backend engineers, security teams, QA engineers, product owners, and other stakeholders to deliver reliable and secure mobile solutions
• Integrate mobile applications securely with RESTful APIs and backend services
• Ensure application quality through unit testing, integration testing, debugging, and automated testing practices
• Stay up to date with emerging iOS technologies, mobile security threats, and industry best practices to continuously improve development standards
• Provide technical guidance and mentorship to junior developers and contribute to engineering standards and best practices

Required competencies and certifications

• Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related field, or equivalent practical experience
• Strong hands‑on experience in iOS application development using Swift and the iOS SDK
• Solid understanding of iOS application architecture, design patterns, and software engineering principles
• Experience designing and implementing secure, scalable, and high-performance mobile applications
• Strong knowledge of secure data storage and persistence mechanisms, including Keychain and appropriate local storage protection
• Experience implementing secure mobile networking using HTTPS, TLS, certificate validation, and other relevant security mechanisms
• Strong understanding of mobile application security principles, threat modeling, and secure coding practices
• In-depth knowledge of OWASP Mobile Application Security principles and common mobile security vulnerabilities
• Experience implementing authentication and authorization technologies, including OAuth 2.0, OIDC, SAML 2.0, and JWT
• Experience integrating RESTful APIs and handling sensitive data securely
• Strong debugging, troubleshooting, analytical, and problem-solving skills
• Experience with Git and collaborative software development workflows