Senior IOS Engineer (Duo)

Cisco•Ann Arbor, MI

2d•Hybrid

About The Position

Duo Security, part of Cisco, makes security simple through cloud-delivered multi-factor authentication. The Auth Experience Mobile team owns Duo Mobile for iOS and supporting services, serving more than four million people and processing well over 100 million pushes monthly. Cross-platform engineers partner with product and design to build accessible, human-centered security experiences. We value ownership, pragmatic decisions, craftsmanship, collaboration, and responsible AI-assisted development. This role shapes trusted authentication at global scale.

Requirements

Bachelor’s degree in computer science or a related technical field.
6+ years of software engineering or related experience.
3+ years of professional engineering experience shipping and supporting production native iOS apps.
Swift experience and maintaining or integrating Objective-C.
iOS SDK and SwiftUI or UIKit experience building performant, maintainable apps.
Automated test design and production mobile release support experience.
Mobile API or backend integration and client or service production diagnosis experience.
Experience using AI coding assistants and other generative AI tools.

Nice To Haves

Advanced SwiftUI or UIKit, Swift concurrency, application lifecycle, UI layout, or animation experience.
Cybersecurity, authentication, cryptography, Keychain, secure data persistence, or advanced networking experience.
Backend services, observability, analytics, staged rollout, or mobile incident response experience.
Experience applying WCAG, ADA, or platform accessibility practices to inclusive mobile experiences.
Technical leadership through architecture, code review, mentoring, testable design, or cross-team delivery.

Responsibilities

Lead complex Duo Mobile iOS capabilities with Swift, Objective-C, core iOS SDKs, and SwiftUI.
Own outcomes from ambiguous requirements through architecture, implementation, tests, rollout, telemetry, and production support, including supporting services.
Raise quality through durable design, rigorous review, delivery tooling, and responsible AI-assisted development.
Partner across product, design, security, backend, and mobile to balance accessibility, reliability, user experience, and threat resistance.
Mentor teammates and shape technical direction.

Benefits

medical, dental and vision insurance
a 401(k) plan with a Cisco matching contribution
paid parental leave
short and long-term disability coverage
basic life insurance
grants of Cisco restricted stock units
10 paid holidays per full calendar year
1 floating holiday for non-exempt employees
1 paid day off for employee’s birthday
paid year-end holiday shutdown
4 paid days off for personal wellness
16 days of paid vacation time per full calendar year (non-exempt employees)
flexible vacation time off program (exempt employees)
80 hours of sick time off provided on hire date and each January 1st thereafter
up to 80 hours of unused sick time carried forward from one calendar year to the next
Additional paid time away may be requested to deal with critical or emergency issues for family members
Optional 10 paid days per full calendar year to volunteer
annual bonuses (non-sales roles)
performance-based incentive pay (sales roles)