<p></p><p>At Robots & Pencils, we’re looking for a Senior iOS Engineer to work on real-time document delivery and synchronization within mission-critical mobile applications. You’ll focus on building and maintaining systems that ensure train crews have reliable, timely access to critical documents, even in offline or high-latency environments.</p><p>This is a senior, hands-on role where you’ll leverage your expertise in Swift/SwiftUI, APNS, and real-time data synchronization to design, implement, and troubleshoot complex document management solutions. You’ll also work on offline-first architectures, data persistence strategies, and conflict resolution to guarantee the integrity and availability of time-sensitive information.</p><p><strong>Key Responsibilities</strong></p><p>· Design and implement real-time document synchronization solutions for mobile applications</p><p>· Integrate and troubleshoot APNS (Apple Push Notification Service) for timely document delivery</p><p>· Develop offline-first architecture and data persistence strategies for critical documents</p><p>· Assess, diagnose, and recommend technical solutions for complex data sync challenges</p><p>· Maintain and enhance document management and delivery systems within iOS applications</p><p>· Apply Swift/SwiftUI expertise to develop scalable and reliable mobile features</p><p>· Evaluate alternative approaches to real-time communication and document synchronization</p><p>· (Optional / Nice to Have) Maintain UIKit/Storyboard components and manage iOS version compatibility updates</p><p>· Ensure document versioning, conflict resolution, and reliability for mission-critical applications</p><p>· Collaborate closely with cross-functional teams to deliver high-quality, production-ready solutions</p><p> </p><p><strong>Required Skills & Qualifications</strong></p><p>· Advanced understanding of APNS (Apple Push Notification Service) implementation and troubleshooting</p><p>· Expertise in real-time document synchronization solutions and architectural patterns</p><p>· Experience with document management and delivery systems in mobile applications</p><p>· Strong ability to assess, diagnose, and recommend technical solutions for complex data sync challenges, particularly for time-sensitive document delivery</p><p>· Proficiency in Swift/SwiftUI for iOS development</p><p>· Understanding of offline-first architecture and data persistence strategies for critical documents</p><p>· Problem-solving skills for evaluating alternative approaches to real-time communication and document sync</p><p><strong>Nice to Have</strong></p><p>· Experience with UIKit/Storyboards</p><p>· Familiarity with iOS version compatibility updates</p><p>· Background in mission-critical or safety-sensitive applications</p><p>· Experience with document versioning and conflict resolution</p><p><strong>Why Join Robots & Pencils?</strong></p><p>At Robots & Pencils, we don’t just build software; we create meaningful technology that helps people live healthier lives. You’ll work alongside passionate engineers, designers, and innovators in a collaborative, remote-friendly environment. With continued growth, now is the perfect time to join our team and make a direct impact on the future of digital health.</p><p></p>