Principal Engineer

About Us: Marriott International Inc., headquartered in Bethesda, Maryland, USA, was founded in May 1927 by J. Willard Marriott and Alice S. Marriott with a modest nine-seat A&W root beer stand. Guided by the family's leadership and core principles, Marriott International today has grown into a global hospitality giant, operating approximately 9,000 properties and over 30 leading brands in more than 140 countries and territories. Role Title: Principal Engineer, Mobile – iOS Position Summary: Serves as a technical subject matter expert (SME) for the iOS Platform, providing strategic technical advisory and hands-on support for the Marriott Bonvoy app. Defines Target Architecture for iOS, advises on the Mobile Platform Roadmap and priorities, and regularly delivers high-impact code. Leads architecture and framework initiatives, partners with other Principal Engineers, Engineering Directors, Enterprise Architecture, and squad Tech Leads to advise on solutioning for major features and adherence to architecture and security standards. Performs code reviews, coaches developers, and recommends improvements around workflow, tools, and standards.Stays abreast of the Apple ecosystem to remain an expert authority on iOS and device capabilities. Researches and explores tools, solutions, frameworks, and industry trends. Leads proof of concepts and objectively assesses technologies against goals and constraints. Educates the mobile engineering community, internal and external. Job Responsibilities: Managing Application Development Standards, Processes, and Tools Facilitates consistency of service delivery across client groups. Ensures compliance with standard application development tools and processes for SDLC (waterfall and agile), estimating, and deployment. Monitors projects for adherence to defined application development processes. Communicates opportunities for broader IT standards and policies. Communicates important application development policy changes. Managing Day-To-Day Relationships with Teams: Manages application development projects in partnership with IT teams, business partners, and providers. Provides project management, oversees reporting, leads project reviews, and manages relationships to promote delivery of services that meet or exceed client expectations. Drives timely resolution of escalated service delivery problems. Manages and improves service level reporting. Assists with application development and maintenance of service provider project management standards and tools. Participates in client portfolio and demand management processes. Implementing and Managing Continuous Improvement Program: Drives adoption of CMMi or similar metrics for continuous improvement. Demonstrates improvement through quality, consistency, and client satisfaction metrics. Works with service providers, IT teams, and business partners to implement continuous improvement activities. Responds to feedback to continually improve client satisfaction. Management Competencies: Leadership: Communication: Conveys information and ideas convincingly. Leading Through Vision and Values: Keeps vision and values at the forefront. Managing Change: Initiates and manages change, serves as a role model. Problem Solving and Decision Making: Identifies issues, develops solutions, chooses a course of action. Professional Demeanor: Exhibits confidence and represents the company. Strategy Development: Develops and executes business plans. Managing Execution: Building a Successful Team: Builds cohesive teams, inspires engagement. Strategy Execution: Ensures successful execution of business plans. Driving for Results: Sets high standards, proactively takes action. Building Relationships: Customer Relationships: Develops and sustains stakeholder relationships. Global Mindset: Supports diverse employees and partners. Strategic Partnerships: Develops collaborative relationships, leverages shared services. Generating Talent and Organizational Capability: Developing Others: Supports skill development, offers challenging assignments. Organizational Capability: Adapts assignments and processes to support goals. Learning and Applying Professional Expertise: Business Acumen: Manages operations, generates innovative solutions. Technical Acumen: Applies professional skills in functional areas. Technical Intelligence: Identifies technological opportunities and threats. Technology Life Cycle: Understands technology timelines. IT Systems: Knowledge of IT systems supporting the business. IT Resources: Secures and manages IT resources. Continuous Learning: Identifies new learning opportunities. Strategy Knowledge: Applies skills to strategic challenges. Basic Competencies: Computer skills, mathematical reasoning, oral and reading comprehension, effective writing. Skills and Experience: Required: 8+ years of application development leadership experience, including: Enterprise-scale native mobile application development on iOS. Expert-level iOS architecture and coding abilities in Swift, SwiftUI, and knowledge of Objective-C. Extensive experience developing large-scale apps supporting millions of users in iOS. Experience with Automation, CI/CD, Release Management, and App Store deployments. Familiarity with Enterprise-level SDKs for Analytics, Networking, Customer Engagement, Application Performance Monitoring. Strong understanding of API platforms, backend services, database, and networking components of full-stack infrastructure. Experience with MVVM architecture, UIKit, Combine, and GraphQL. Undergraduate/graduate degree or equivalent education + experience. Preferred: Demonstrated success leading medium- to large-scale initiatives/transformations. Proven knowledge of Agile methodology (preferably SAFe Agile). Experience with mixed and offshore delivery models. Good process management, negotiating, influencing, and problem resolution skills. Proven ability to prioritize and execute tasks in a high-pressure environment. Knowledge of business environment, service requirements, and hospitality culture. Knowledge of/familiarity with Android platform. Ability to assess customer/client needs, creatively approach solutions, and influence appropriate courses of action. Ability to communicate technology lifecycles and strategies. Solid understanding of IT financial structures and ability to manage corporate financial processes and standards. Strong verbal and written communication skills. Ability to accomplish results through others, especially in a managed service environment. Experience using AI/ML and LLMs to automate code generation, documentation, testing, or feature development in mobile apps. Education and Certifications: Undergraduate degree or equivalent experience/certification. Work Location: Hyderabad, India. Work Mode: Hybrid. Marriott’s core values: At Marriott, our core value make us who we are. We believe that success is never final. As we change and grow, the beliefs that are most important to us stay the same—putting people first, pursuing excellence, embracing change, acting with integrity, and serving our world. Being part of Marriott Tech Accelerator means being part of a proud history and a thriving culture.