Senior iOS Developer (Ad SDK Infrastructure)

Sigma Software is seeking a Senior iOS Developer to join a high-impact AdTech project focused on building and maintaining production-grade mobile advertising SDKs. You will work on critical infrastructure used by publishers globally, ensuring high stability and performance in a complex, quality-oriented environment.

Key responsibilities

• Develop and maintain native iOS SDK functionality using Swift and Objective-C.
• Improve SDK architecture, stability, scalability, and overall maintainability.
• Manage SDK packaging, versioning, and distribution through CocoaPods.
• Ensure high release quality through automated testing and rigorous validation.
• Collaborate with cross-functional teams to resolve integration issues and support third-party publishers.

Requirements

• At least 5 years of professional experience in iOS development.
• Strong commercial expertise in both Swift and Objective-C.
• Proven hands-on experience developing native iOS SDKs or reusable libraries.
• Deep understanding of SDK architecture, versioning, and backward compatibility.
• Experience with CocoaPods and complex release management workflows.
• Upper-Intermediate level of English proficiency.

What we offer

• Opportunity to work on technically challenging, high-scale mobile monetization solutions.
• Collaboration with experienced engineering teams in a professional environment.
• Exposure to production-critical SDK development and open-source projects.
• A culture that values high standards, precision, and proactive ownership.