Senior IOS Developer

We’re reinventing the market research industry. Let’s reinvent it together. At Numerator, we believe tomorrow’s success starts with today’s market intelligence. We empower the world’s leading brands and retailers with unmatched insights into consumer behavior and the influencers that drive it. We are looking for a Senior iOS Developer to lead development and maintenance of our native iOS application in a shared mobile platform environment. This role requires strong hands-on experience with native iOS engineering, including Objective-C-based production applications, UIKit-driven app flows, SDK integrations, and release management across multiple schemes and environments. As a Senior iOS Developer, you will work across the branded app layer and a broader ecosystem of internal mobile frameworks. You will be expected to improve code quality, own technical decisions, support production releases, and help the team navigate integration-heavy mobile development involving notifications, deep linking, attribution, and App Store delivery processes.

Key Responsibilities

• Design, develop, test, and maintain native iOS functionality across multiple app schemes and environments
• Work confidently in an Objective-C-heavy codebase, while contributing where needed to Swift-based or framework-integrated components
• Lead integration of internal mobile frameworks and third-party SDKs used for notifications, attribution, analytics, and application services
• Own technical implementation for deep linking, notification flows, app lifecycle behavior, and environment-specific configuration
• Support App Store and non-production release processes, code signing, provisioning, and build automation
• Troubleshoot complex issues across app code, embedded frameworks, and runtime configuration
• Collaborate with product owners, backend engineers, QA, and other mobile engineers to deliver robust software solutions
• Drive code reviews, mentoring, and engineering best practices across the iOS team
• Improve application stability, maintainability, and release quality over time
• Document architectural decisions, platform integrations, and release-critical technical details

What You'll Bring to Numerator

• 5+ years of experience in native iOS development with production ownership of shipped mobile applications
• Strong proficiency in Objective-C and solid working knowledge of Swift
• Strong experience with UIKit, application lifecycle management, AppDelegate-based flows, and native iOS platform APIs
• Experience working with Xcode project configuration, multiple schemes, entitlements, provisioning profiles, and code signing
• Strong understanding of push notifications, notification service extensions, deep links, universal links, and app-level routing
• Experience integrating SDKs such as Firebase, attribution/analytics tools, or other third-party mobile services
• Experience with Fastlane or similar tooling for iOS build and release automation
• Strong debugging skills across app code, embedded frameworks, and release configuration issues
• Experience with Git-based workflows and collaboration in cross-functional Agile teams
• Strong communication skills and the ability to mentor and guide other engineers
• Strong experience using AI-assisted engineering tools such as GitHub Copilot, ChatGPT, or similar to improve developer productivity, accelerate debugging and code analysis, support documentation, and streamline delivery, with sound judgment around code quality, security, maintainability, and validation.

Good to Have

• Experience working in large or framework-heavy native iOS applications
• Familiarity with App Tracking Transparency and attribution/deep-linking flows
• Experience with crash reporting, diagnostics, and release observability tooling
• Exposure to highly localized applications and region-specific mobile delivery concerns

Our Technology Stack

• Objective-C / Swift
• UIKit / Native iOS SDK
• Xcode / Fastlane
• Push Notifications / Notification Service Extensions
• Deep Links / Universal Links
• Firebase / Adjust
• Git / CI/CD Tooling