iOS Mobile Developer (Swift)

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

Benefits offered by this job

Generous time-off policy

Flexible telework options

Tuition reimbursement

Health plans with dental and vision

Job summary

Dev Technology Group is seeking an iOS Engineer for an on-device translation platform in Reston, VA. You will own the on-device real-time translation app, performance tuning, and memory management, while integrating Core ML/ONNX and WhisperKit within a constrained iPhone environment.

You will implement AVAudioEngine-based audio pipelines, Swift concurrency, and ensure robust production releases with secure, compliant processes for federal customers.

Qualifications

• 5+ years shipping production iOS apps in Swift (must-have).
• 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).

Responsibilities

• Own the iOS application architecture, performance, memory management, and production releases.
• Integrate on-device ML inference frameworks and manage loading, lifecycle, and error recovery.
• Maintain real-time audio pipeline using AVAudioEngine and VAD with careful threading priorities.
• Apply Swift concurrency across modules without data races or jetsam issues on 6GB devices.

Skills

5+ years shipping iOS apps

AVAudioEngine / AudioUnit expertise

ML/framework integration in iOS (Core 

Tools

AVAudioEngine

AudioUnit

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 6GB 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.

As a Washington Post Top Workplace award winner for the past THIRTEEN years in a row, the Top Workplaces USA for the past five years, and a recipient of the Companies As Responsive Employers (CARE) Award for the past six years, Dev Technology employees enjoy:

• 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
• To learn more about working at Dev Technology, visit Working At Dev Technology Group

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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