Yoh, A Day & Zimmermann Company · 3 hours ago
Sr. iOS Developer- app Performance- W2 only no corps
United States
Contract
Remote
Senior Level
$56/hr - $80/hrYoh, A Day & Zimmermann Company is seeking a Senior iOS Developer with expertise in building high-performance native iOS applications and managing the software delivery lifecycle. The role focuses on developing and optimizing applications, maintaining automated build/test pipelines, ensuring code quality, and managing release processes.
AccountingConsultingHuman ResourcesBookkeeping and PayrollStaffing Agency
No H1B
Hiring Manager
Renu Goel
Responsibilities
Design and develop robust, scalable, and resource-efficient native iOS applications
Maintain and optimize automated build/test pipelines to ensure seamless delivery
Drive code responsiveness and performance through rigorous profiling and 'Shift-Left' testing (XCTest)
Orchestrate the end-to-end deployment process from beta distribution to App Store submission
Improve the existing codebase with a focus on modularity, reusability, and modern best practices
Qualification
Required
Expert Swift & SwiftUI: In-depth knowledge of SwiftUI, Combine, and modern declarative UI development alongside UIKit
Architecture & Data: Strong grasp of MVVM, Dependency Injection, and data persistence via Core Data and the iOS Keychain
Performance Optimization: Proficiency in using Instruments for memory management, thread safety (Swift Concurrency/GCD), and UI responsiveness
DevOps & Delivery: Hands-on experience setting up CI/CD pipelines (Bitrise/Jenkins) and managing the full App Store/TestFlight release process
Data Integration: Familiarity with background processing, networking (REST/GraphQL), and external hardware/sensor data ingestion
Preferred
Experience with app Performance will be a plus
Benefits
Medical, Prescription, Dental & Vision Benefits (for employees working 20+ hours per week)
Health Savings Account (HSA) (for employees working 20+ hours per week)
Life & Disability Insurance (for employees working 20+ hours per week)
MetLife Voluntary Benefits
Employee Assistance Program (EAP)
401K Retirement Savings Plan
Direct Deposit & weekly epayroll
Referral Bonus Programs
Certification and training opportunities
Company
Yoh, A Day & Zimmermann Company
When progress demands experience, that’s where we come in.
Founded in 1940
1001-5000 employees
Funding
Current Stage
Late StageLeadership Team
Peter Melomo
Vice President, Sales Strategy & Professional Consulting Services
Tom Enright
VP Recruiting - Specialty Practices
Recent News
Philadelphia Business Journal
2025-01-11
Company data provided by crunchbase