iOS App Developer Needed for Mission-Critical Mobile App Backend

Silverline Labs

Freelance · Remote · Flexible hours

About the role

Silverline Labs is launching an integration effort to unify billing, CRM, and internal APIs within its iOS ecosystem. We need a focused iOS App Developer to design and implement the glue code that connects these services while maintaining a seamless user experience.

Key responsibilities

• Design and build Swift modules that consume REST APIs from billing, CRM, and internal services.
• Implement secure authentication flows across multiple back‑ends.
• Collaborate with backend engineers to define data contracts and error handling.
• Write unit and UI tests to ensure reliability during integration.
• Document integration patterns for future maintenance.

Must-have skills

• Strong proficiency in Swift and iOS SDK.
• Hands‑on experience with RESTful API consumption and JSON parsing.
• Understanding of authentication mechanisms (OAuth, token refresh).
• Ability to work independently in a remote, freelance setting.

Nice to have

• Familiarity with Combine or RxSwift for reactive data handling.
• Experience integrating third‑party billing or CRM platforms.
• Knowledge of CI/CD pipelines for iOS apps.