Technology and Engineering | Sr. iOS Developer; onsite, NYC or Chicago , United

Sr. iOS Developer (onsite, NYC or Chicago)

Job : | 375 Hudson Street New York New York 10014 United States | Others

• At Publicis Sapient, we help organizations unlock value through digital business transformation—building products and platforms that matter to our clients and their customers.
• As a Senior iOS Developer, you will lead the design and development of scalable, high-performance mobile applications using modern iOS frameworks and architectural principles.
• You will collaborate across product, design, and engineering teams to deliver seamless, accessible, and data-driven user experiences while shaping engineering practices and mentoring team members.
• This role combines deep technical expertise with ownership, enabling you to influence mobile strategy, architecture, and delivery in a fast-paced, client-focused environment.

• Strong experience building iOS applications using Swift
• Hands-on expertise with SwiftUI and modern UI architecture
• Proven experience building modular codebases and reusable UI component systems
• Experience working with concurrency models (async/await, Combine, background processing)
• Solid understanding of mobile performance optimization, including memory, CPU, and battery usage
• Experience integrating analytics frameworks and implementing event tracking systems
• Familiarity with feature flagging, experimentation frameworks, and release management practices
• Experience with CI/CD pipelines and mobile build/release tooling
• Strong debugging, problem-solving, and system design skills
• Experience collaborating in cross-functional Agile teams

• Experience building and scaling enterprise-grade mobile platforms
• Deep understanding of accessibility standards and inclusive design practices
• Experience with design systems, token architecture, and UI theming strategies
• Exposure to observability, monitoring, and performance tuning at scale
• Experience mentoring engineers and influencing engineering best practices
• Demonstrated alignment with Publicis Sapient core values such as Learning Mindset, Inclusive Collaboration, and Partnering for Client Impact
• Experience applying AI-assisted workflows in production development environments
• Contributions to open-source iOS projects or technical communities

• An inclusive workplace that promotes diversity and collaboration.
• Access to ongoing learning and development opportunities.
• Competitive compensation and benefits package.
• Flexibility to support work-life balance.
• Comprehensive health benefits for you and your family.
• Generous paid leave and holidays.
• Wellness program and employee assistance.

As part of our dedication to an inclusive and diverse workforce, Publicis Sapient is committed to Equal Employment Opportunity without regard for race, color, national origin, ethnicity, gender, protected veteran status, disability, sexual orientation, gender identity, or religion. We are also committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If you need assistance or an accommodation due to a disability, you may contact us at

Pay Range: $96,000 - $161,000 annual salary

Publicis Sapient is a digital transformation partner helping established organizations get to their future, digitally enabled state, both in the way they work and the way they serve their customers. We help unlock value through a start-up mindset and modern methods, fusing strategy, consulting, and customer experience with agile engineering and problem-solving creativity. United by our core values and our purpose of helping people thrive in the brave pursuit of next, our 20,000+ people in 53 offices around the world combine experience across technology, data sciences, consulting, and customer obsession to accelerate our clients’ businesses through designing the products and services their customers truly value.

Philadelphia, Pennsylvania, United States