Nextmark

iOS Developer

Contractor · Remote · 10 openings

In this role, you'll apply your expertise to help train next-generation AI systems. Your work will shape how models learn, reason, and perform through high-quality, real-world input. No prior experience in AI is required — your domain knowledge is what matters.

Key Responsibilities

  • Develop, test, and deploy advanced iOS applications using Swift, UIKit, and SwiftUI while following best coding practices.
  • Integrate and manage API connections for robust data handling and real-time app functionality.
  • Collaborate closely with cross-functional teams including designers, product managers, and backend developers to deliver cohesive and innovative app features.
  • Optimize application performance, ensuring speed, responsiveness, and reliability across all supported devices.
  • Implement solid architectural patterns such as MVC, promoting scalability and maintainability.
  • Ensure seamless user experiences by focusing on UI/UX principles and intuitive app design.
  • Participate in rigorous testing, debugging, and deployment processes to maintain high app quality and meet App Store requirements.

Required Skills & Qualifications

  • Expert-level proficiency in Swift programming language.
  • In-depth experience with UIKit and SwiftUI for building sophisticated mobile interfaces.
  • Strong understanding of MVC architectural patterns.
  • Demonstrated expertise in API integration and mobile networking.
  • Proven track record of delivering high-performance, stable, and maintainable iOS applications.
  • Excellent written and verbal communication skills; ability to convey technical concepts clearly to both technical and non-technical stakeholders.
  • Keen attention to detail and a passion for delivering outstanding mobile experiences.

Preferred Qualifications

  • Experience in deploying and maintaining apps on the Apple App Store.
  • Familiarity with automated testing frameworks and continuous integration for iOS.
  • Background in collaborating with distributed or global teams.

$30–$90/hr

Remote