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Principal/Senior iOS Developer [Remote, NO C2C]

Engineering | Remote | Full Time and Contract

Job Description

JOB TYPE: Freelance, Contract Position - No agencies (See notes below)

LOCATION: Remote (Must be US citizen/permanent resident to apply)

HOURLY RANGE: Our client is looking to pay $85 - $110 USD / HR

ESTIMATED DURATION: 40Hrs/Week - long-term, ongoing project


Braintrust ( is a user-controlled talent network, where you keep 100% of what you earn and actually get to own the platform. We've been onboarding some big clients and specifically need a Native iOS Developer for our client.  



Our client is looking for a Senior Native iOS Developer to enhance the iOS app (written in Swift) to add features using BLE/NFC, custom UI components/visualization, etc.

This is a fully native app build from day one using the latest tech (Swift, Combine, etc). You will have the ability to work with BLE/NFC, integrate with a lot of external IoT/sensor devices.

You will optimize performance with huge amounts of data being processed by the app in an offline-first approach, challenging and rewarding.

Hopefully, you will be obsessed with a premium look & feel & attention to detail.



  • Custom chart components updated with real-time data (Reactive)
  • Ability post/search/interact with messages
  • Performance Tuning, battery resource consumption optimization & increase automated test coverage


  • Swift
  • SwiftUI
  • Custom UI components
  • Modular Design
  • Automated/Unit Testing
  • Strong communication skills
  • Based in the US


Qualified candidates will be invited to do a screening interview with the Braintrust staff. We will answer your questions about the project, and our platform.  If we determine it is the right fit for both parties, we'll invite you to join the platform and create a profile to apply directly for this project.  

C2C Candidates: This role is not available to C2C candidates working with an agency. If you are a professional contractor who has created an LLC/corp around their consulting practice, this is well aligned with Braintrust and we’d welcome your application.  

Braintrust values the multitude of talents and perspectives that a diverse workforce brings. All qualified applicants will receive consideration for employment without regard to race, national origin, religion, age, color, sex, sexual orientation, gender identity, disability, or protected veteran status.