Senior Software Engineer-iOS

Takes day-to-day direction from assigned Product Leader/Owner to lead technical workgroups and/or functions as a technical expert. Operates as a key member of the team/squad to resolve and makes decisions on more complex, non-routine service requests with limited to moderate risk. Performs research, analysis, design, creation and implementation of applications to meet current and future user requirements. Defines and creates the next generation of solutions to drive Marriott value. Monitors multiple projects by Service Provider to successful completion, maintaining scope within the time and budget constraints. Creates solutions that serve our business leveraging current and leading-edge technologies in an innovative and impactful manner., + Trains and/or mentors other team members, and peers as appropriate

• Provides financial input on department or project budgets, capital expenditures or other cost/resource estimates as requested

• Identifies opportunities to enhance the service delivery processes.

Delivering Technology

• Performs more complex quantitative and qualitative analyses for service delivery processes and projects.

• Facilitates achievement of expected deliverables and obligations of Services Providers

• Validates completeness of requirements prior to Service Provider solutioning

• Ensures all projects follow the defined development and business case processes

• Ensures proper coordination with appropriate IT and vendor relations teams

• Provides consultation for routine and complex systems development

• Ensures early warning to the business stakeholder executives regarding degraded or missed service levels

• Coordinates with Operations and Infrastructure teams for deployment and production support activities

IT Governance

• Follows all defined IT standards and processes (i.e. IT Governance, SM&G, Architecture, etc.), and provides input for improvements to the appropriate process owners as needed

• Maintains a proper balance between business and operational risk

• Follows the defined project management standards and processes

Service Provider Management

• Validates that Service Providers develop and manage respective aspects of a project plan, including schedules, deliverables, and appropriate metrics.

• Makes short term plans for the team to effectively utilize resources

• Monitors Service Provider outcomes

• Reviews estimates of work effort for client project provided by Service Providers for accuracy

• Facilitates timely resolution of service delivery problems and minimizes the impact to clients

• 6+ years’ experience in software development with expert level expertise i n multiple programming languages and methodologies

• 5+ years hands-on experience with iOS native application development languages, frameworks and tools (e.g., Swift, SwiftUI, Combine, Objective-C)

• Experience leveraging AI-assisted development tools to accelerate software engineering workflows, including code generation, code analysis, debugging, refactoring, and defect investigation

• Strong verbal and written communication skills with the ability to articulate complex technical and quality concepts in clear, business friendly terms

• Undergraduate degree or equivalent experience/certification

Preferred:

• Experience with Swift Concurrency including async/await, actors, and structured concurrency for modern asynchronous programming

• Experience with iOS test automation frameworks and tools such as XCTest and XCUITest, with the exposure to write and maintain automated tests

• Experience with CI/CD tooling and quality gates, including integration of automated testing into build pipelines

• Understanding of quality practices and testing methodologies in an agile environment, with ability to collaborate with QA teams on test strategy and coverage

• Experience with iOS analytics, crash reporting, and experimentation frameworks to inform quality improvements and engineering decisions

• Excellent knowledge of working with dynamic data using services (e.g., JSON, REST APIs, GQL, etc.)

• Experience with Data Modeling, Networking, and Push Notification frameworks

• Experience with Apple Watch

• Active contributions to OSS projects

• Experience in Agile software methodologies such as Scrum or SAFe

• Experience with DevOps tools such as Git, JIRA, Jenkins, Dynatrace

• Experience developing apps for large, critical user bases

• Experience developing apps supporting UI for varying screen sizes (e.g., phones and tablets)

• Experience with 3rd Party SDK integrations and other open source libraries

• Experience packaging and publishing applications on the App Store

• Understanding of latest trends in mobile and web technologies

• Demonstrated understanding of mobile industry trends, development products and environments as well as best practices for mobile application design and development

• Demonstrated ability to anticipate future software engineering opportunities

• Technology leadership experience in a sourced environment

• Ability to accomplish results through others, particularly by establishing relationships, effective controls and leading in a managed service environment

• Relevant technology certifications

All positions offer a 401(k) plan, stock purchase plan, discounts at Marriott properties, commuter benefits, employee assistance plan, and childcare discounts. Benefits are subject to terms and conditions, which may include rules regarding eligibility, enrollment, waiting period, contribution, benefit limits, election changes, benefit exclusions, and others. Click here (https://life.marriott.com/wp-content/uploads/2025/09/benefitsoverviewp_2025edits_8.19.25.pdf) to learn more.

Full-time positions also offer coverage for medical, dental, vision, health care flexible spending account, dependent care flexible spending account, life insurance, disability insurance, accident insurance, adoption expense reimbursements, paid parental leave and educational assistance.

Washington Applicants Only : Employees will accrue paid sick leave, 0.077 PTO balance for every hour worked and be eligible to receive a minimum of 9 holidays annually.

Marriott HQ is committed to a hybrid work environment that enables associates to Be connected. Headquarters-based positions are considered hybrid, for candidates within a commuting distance to Bethesda, MD; candidates outside of commuting distance to Bethesda, MD will be considered for Remote positions.

Marriott International is the world’s largest hotel company, with more brands, more hotels and more opportunities for associates to grow and succeed. Be where you can do your best work, begin your purpose, belong to an amazing global team, and become the best version of you.