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Senior iOS Developer (Ad SDK Infrastructure)

Sigma Software · Kraków, Lesser Poland Voivodeship, Poland

Mobile DevelopmentSenior LevelExternal listingfull-timeabout 18 hours ago

About The Role

  • Develop and maintain native iOS SDK functionality using Swift and Objective-C
  • Contribute to feature development for existing open-source SDK products
  • Improve SDK architecture, stability, scalability, and maintainability
  • Support SDK packaging, versioning, and distribution through CocoaPods
  • Ensure high release quality through automated testing and device-based validation
  • Investigate and resolve bugs, integration issues, and publisher-reported problems
  • Collaborate with Backend, Android, QA, and Product teams
  • Optimize SDK performance, reliability, and compatibility across supported iOS environments
  • Participate in release planning and quality assurance activities for SDK releases
  • Provide technical support for third-party integrations and troubleshooting activities
  • At least 5 years of production iOS development experience
  • Strong commercial experience with Swift and Objective-C
  • Hands-on experience developing native iOS SDKs or reusable iOS libraries
  • Strong understanding of SDK architecture principles and mobile platform internals
  • Experience with CocoaPods and SDK packaging/distribution workflows
  • Proven experience with SDK versioning, release processes, and backward compatibility management
  • Practical experience with automated testing and device-based testing approaches
  • Understanding of production support processes and troubleshooting complex integration issues
  • Ability to work independently and take ownership of SDK quality and delivery
  • At least an Upper-Intermediate level of English

WILL BE A PLUS

  • Experience leveraging AI tools for testing and coverage analysis
  • Familiarity with SSPs, ad servers, banner and video advertising, and tracking pixels
  • Experience working with open-source SDKs
  • Experience supporting third-party integrations and publisher-side troubleshooting

PERSONAL PROFILE

  • Committed to high standards and precision in every deliverable
  • Strong sense of ownership and proactive approach in fast-paced, release-sensitive environments
  • Effective both as a collaborative team player and as an independent contributor
  • Self-motivated and result-oriented mindset

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