Principal iOS Mobile Developer (Swift)

3 hours ago

Reston, VA, USAStaff+

Base Salary

$100k - $160k/yr

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.

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.

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.

AWSiOSSwift