iOS Systems & Full-Stack Engineer

Who We Are HeadSpin, a PartnerOne portfolio company, is a global digital experience intelligence and omnichannel testing platform dedicated to perfecting mobile, web, and OTT experiences. With real devices and real SIMs deployed across 60+ locations in 50+ countries , HeadSpin enables enterprises to test, monitor, and optimize their applications and networks under genuine user, device, and carrier conditions. Our platform supports the full spectrum of quality assurance needs, including functional testing, non-functional testing such as performance, load, and stress validation, network connectivity testing, platform and environment verification, benchmarking, hardware and battery testing, integrity and compliance checks, and robust security testing. Teams also benefit from specialized capabilities across API testing, UX testing, media/DRM validation, and cross-device integration workflows. Powered by advanced data analytics and AI/ML-driven insights, HeadSpin provides deep visibility into more than 130 user experience and performance KPIs, enabling rapid issue identification, faster release cycles, and consistently high-quality digital experiences. Trusted by global leaders in telecom, banking, retail, media, and gaming, HeadSpin helps organizations streamline development, eliminate manual QA bottlenecks, and deliver optimized digital experiences at scale. Role Overview We are looking for a highly skilled iOS Engineer who lives and breathes the Apple ecosystem but isn't afraid to dive into the server-side. You won't just be building apps; you will be navigating the internals of iOS, and building the APIs that power these interactions. This role is perfect for a developer who enjoys "how things work" under the hood—from XCTest and mobile-subsystems to scalable backend services in Python or Go. Key Responsibilities Backend API Development (50-60%): During key infrastructure sprints, you will focus heavily on building, scaling, and maintaining the Python or Go services. iOS Core Development (40-50%): Design and maintain complex iOS applications and frameworks using Swift and Objective-C. System-Level Engineering: Deep dive into iOS internals (processes, security, and automation frameworks) to support custom hardware or software integrations. Backend Integration: Develop, test, and maintain robust, scalable APIs in Python (FastAPI/Flask) or Go to support mobile features and data synchronization. Ecosystem Troubleshooting: Provide high-level technical support for the entire Apple stack, including code-signing, provisioning, MDM (Mobile Device Management), and CI/CD pipelines. Collaboration: Work closely with infrastructure teams to ensure mobile devices are correctly isolated and containerized within our broader service environment. Required Technical Skills 1. The iOS Power User Expertise in Swift and a strong working knowledge of Objective-C . Deep understanding of iOS Internals : Process management, keychain, background tasks, and system performance tuning. Experience with XCUITest and mobile automation tools (e.g., Maestro, Appium, or custom XCTest runners). Mastery of the Apple Deployment cycle: Certificates, Provisioning Profiles, App Store Connect, and TestFlight. 2. The API / Backend Hybrid Proficiency in either Python or Go . Experience designing RESTful or gRPC APIs . Knowledge of Docker and containerization strategies for isolating service environments. Understanding of networking protocols (WebSockets, HTTP/2, SSH tunneling). Good understanding of Design patterns and Data Structures and Algorithms. Required Experience : • Minimum 4 years of software development experience in IOS development and backend technologies. Required Education • Four year Bachelor’s degree in computer science or Information Technology. Location • India (remote) Soft Skills & Mindset Support-Oriented: Willingness to provide "on-call" or deep-dive technical support when Apple ecosystem updates break existing workflows. Architecture First: Ability t