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Principal iOS Mobile Developer (Swift)

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Principal iOS Mobile Developer (Swift) in USA

  • Dev Technology
  • Full time
  • Email
  • Reston, VA

Responsibilities

  • Own the iOS application architecture, performance, memory management, and production releases.
  • Integrate Core ML, ONNX Runtime, and WhisperKit for on-device ML inference, including model loading, lifecycle management, and error recovery.
  • Build a real-time audio pipeline using AVAudioEngine, voice activity detection, and hardware-priority buffer management.
  • Implement resumable multi-file background model downloads using URLSession, including state persistence and network transition handling.
  • Build peer-to-peer transcript sharing between devices using MultipeerConnectivity.
  • Apply Swift concurrency across the application while preventing data races, deadlocks, and memory-related termination on 6GB devices.
  • Ship the application through a federal accreditation pipeline.

Requirements

  • 8+ years of experience shipping production iOS applications in Swift.
  • Direct experience with AVAudioEngine or AudioUnit at the hardware callback level.
  • Experience integrating ML or signal-processing frameworks into iOS applications, such as Core ML, ONNX, or TensorFlow Lite.
  • Proficiency managing memory and performance on constrained devices using Instruments.
  • Experience building resilient background URLSession download or upload systems.
  • Experience with protocol-oriented architecture, multi-module Swift packages, and testable service layers.
  • Ability to hold a security clearance and work in a federal compliance environment.
  • FISMA experience is preferred but not required.

Benefits

  • Generous and flexible time-off policy.
  • Flexible work schedules and telework options, including remote work availability for eligible projects.
  • Career development through mentorship, technical and management training, DevLab hands-on learning, tuition reimbursement, and paid training opportunities.
  • Health plan options with dental and vision coverage, flexible spending accounts, commuter benefits, life insurance, and other benefits.
  • 401(k) matching with a 5% matching contribution.
  • Regular team and company social events.
  • Community engagement programs, donation matching, and time off for volunteer efforts.
  • Position availability is limited to the listed operating states.

Salary: $100k - $160k/yr

Dev Technology

Dev Technology delivers innovative software solutions that empower businesses to streamline operations and accelerate growth. By combining cutting‑edge development practices with a customer‑centric approach, we help clients transform ideas into reliable, scalable products. Our team’s expertise sp...

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