iOS Mobile Developer (Swift)

Dev Technology; Reston (VA); On-site; USD 100,000 - 160,000; Full time

Benefits offered by this job

Generous time-off

Flexible schedules

Mentorship program

Tuition reimbursement

Health plans

401K matching

Job summary

Dev Technology is seeking an experienced iOS Engineer to build an on-device translation platform for federal mission environments in Reston, VA. You will own the iOS app architecture, performance, and production releases, integrating on-device ML models and coordinating cross-service workflows.

You will work with Core ML, ONNX Runtime, and WhisperKit, ensure memory efficiency on 6 GB devices, and implement real-time audio pipelines with AVAudioEngine.

Qualifications

• 5+ years shipping production iOS apps in Swift.
• Experience with AVAudioEngine or AudioUnit at the hardware callback level.
• Track record integrating ML frameworks into iOS apps (Core ML, ONNX, TensorFlow Lite).
• Memory and performance optimization on constrained devices.
• Experience with background URLSession and resilient download/upload systems.
• Proficiency with protocol-oriented design and multi-module Swift packages.
• Ability to work in a federal compliance environment with security requirements.

Responsibilities

• Own the iOS application: architecture, performance, memory management, and production releases.
• Integrate on-device ML inference frameworks—loading, lifecycle, error recovery—without training models.
• Build real-time audio pipeline: AVAudioEngine, VAD, buffer management with priority.
• Apply Swift concurrency to avoid data races and jetsam kills on limited device memory.

Skills

5+ years Swift

AVAudioEngine

ML frameworks

Memory optimization

URLSession

Swift packages

Protocol-oriented design

Security/compliance experience

Tools

Core ML

ONNX Runtime

WhisperKit

Job description

iOS Engineer — On-Device Translation Platform | DHS/ICE Mission Environment

What You'll Build

A real-time speech translation app that runs entirely on-device: audio capture → speech recognition → translation → text-to-speech, coordinated across multiple services on hardware-constrained iPhones. You'll integrate vendor-provided ML models, manage background OTA model delivery from AWS, build peer-to-peer device communication, and ship to production through a federal accreditation pipeline.

What You'll Own

• The iOS application: architecture, performance, memory management, and production releases
• Integration of on-device ML inference frameworks (Core ML, ONNX Runtime, WhisperKit) — loading, lifecycle, error recovery — not training the models
• Real-time audio pipeline: AVAudioEngine, voice activity detection, buffer management at hardware-thread priority
• Swift concurrency across all of the above without data races, deadlocks, or jetsam kills on 6 GB devices

What You Bring

• 5+ years shipping production iOS apps in Swift
• Direct experience with AVAudioEngine or AudioUnit at the hardware callback level
• Track record integrating ML or signal-processing frameworks into iOS apps (Core ML, ONNX, TensorFlow Lite, or similar)
• Proficiency managing memory and performance on constrained devices using Instruments
• Experience with background URLSession and resilient download/upload systems
• Comfort with protocol-oriented architecture, multi-module Swift packages, and testable service layers
• Ability to hold a clearance and work in a federal compliance environment (FISMA experience is a plus, not a requirement – you'll have security and compliance teammates)

The estimated salary range for this position is $100,000 - $160,000. This salary range is not a guarantee of compensation. The offered salary will be based on factors including relevant experience, geographic location, internal equity, and applicable contractual requirements. *Compensation may fall outside this range when appropriate.

Who We Are

Dev Technology is a growing IT company with an employee-centric culture that works on mission-critical projects for the federal government. We partner with our federal customers to deliver technology services and solutions, and to drive our client's missions forward through innovation. We use Agile and DevSecOps principles to provide services including application development, biometrics and identity management, cloud and infrastructure optimization, IT and legacy modernization, and data management.

Benefits

• Generous and flexible time-off policy
• Flexible work schedules and telework options, including remote work availability for eligible projects
• Career development opportunities including a mentorship program, technical and management training through Dev University, hands-on learning through DevLab, tuition reimbursement, and paid training opportunities
• Industry-leading benefits including a choice of two health plans that include dental and vision, flexible spending account, commuter benefits, life insurance, and more
• 401K matching with a 5% matching contribution
• Regular team and company social events including our annual party, happy hours, fitness challenges, and more
• A focus on community engagement including company wide support activities, employer match for donations, and time off for volunteer efforts

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

Dev Technology Group operates in the following states: AL, AR, AZ, CO, DC, FL, GA, ID, IL, IN, MD, MA, ME, MI, MN, MO, MS, NC, NJ, OH, OR, PA, SC, TN, TX, VA, WV.

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