New

Senior Ios Developer

TEKsystems
$55.00 - $60.00 / hr
life insurance, sick time, 401(k), retirement plan
United States, Illinois, Bannockburn
Feb 06, 2026
Key Responsibilities: iOS Engineering -Build and maintain modern iOS apps using Swift, SwiftUI, and UIKit. -Architect modular, testable, scalable applications with MVVM and DI. -Implement reactive and asynchronous flows using Combine and async/await. -Integrate with REST APIs and implement offline persistence (Core Data/Realm/SQLite). -Optimize performance using Instruments (e.g., memory usage, CPU, launch time). App Distribution & DevOps -Manage modules and internal frameworks using SPM. -Own CI/CD workflows for iOS builds (Fastlane or equivalents). -Configure and manage TestFlight distribution and release automation. Quality & Collaboration -Write and maintain unit and UI tests (XCTest). -Participate in code reviews, technical discussions, and architectural planning. -Work closely with Product Engineering, Backend teams, and Android developers. App Ownership -Take independent ownership of features, releases, and roadmap items. -Guide the team on best practices, modern iOS development patterns, and release processes. Skills swift, mvvm, application development, apple ios, android, api development Top Skills Details swift,mvvm,application development,apple ios Additional Skills & Qualifications -Android knowledge or experience supporting Android apps (highly preferred by the team for crossskill coverage). -Experience working in healthcare, HIPAAregulated environments, or other highcompliance systems (not required, but helpful). -Understanding of backend service development or API design principles. -Experience collaborating with backend teams on REST API improvements. -Understanding of backend service development or API design principles. -Experience collaborating with backend teams on REST API improvements. -Familiarity with modular architecture, feature modules, and dynamic frameworks. -Experience with analytics platforms (Firebase, Amplitude, Mixpanel, Segment, etc.). -Experience managing A/B testing or inapp experiments. Experience Level Expert Level Job Type & LocationThis is a Contract to Hire position based out of Bannockburn, IL. Pay and BenefitsThe pay range for this position is $55.00 - $60.00/hr. Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: * Medical, dental & vision * Critical Illness, Accident, and Hospital * 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available * Life Insurance (Voluntary Life & AD&D for the employee and dependents) * Short and long-term disability * Health Spending Account (HSA) * Transportation benefits * Employee Assistance Program * Time Off/Leave (PTO, Vacation or Sick Leave) Workplace TypeThis is a hybrid position in Bannockburn,IL. Application DeadlineThis position is anticipated to close on Feb 9, 2026. h4>About TEKsystems: We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company. The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law. About TEKsystems and TEKsystems Global Services We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com. The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.