Full-Time

On-device AI Frameworks Engineer

Updated on 9/3/2026

Argmax

Argmax

11-50 employees

Open-source on-device AI inference platform

No salary listed

Union City, NJ, USA

Hybrid

Three days per week on-site in Manhattan, NY (Palo Alto, CA also available).

Category
Software Engineering (1)
Required Skills
Python
iOS/Swift

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Requirements
  • 3+ years of hands-on experience in SDK or Frameworks development for iOS or macOS
  • Fluency in Swift
  • Fluency in profiling and optimizing native applications
  • Familiarity with at least one of Core ML, MLX Swift, LiteRT, ONNX, WebGPU or ExecuTorch
Responsibilities
  • Productionize research prototypes: The Applied Research team will come to you with a Python prototype that provides the blueprints for a new feature ([example](https://www.argmaxinc.com/blog/customize-speech-to-text)) for one of our AI Frameworks. You will collaborate with them in turning this standalone prototype into a production-ready implementation in a test-driven development fashion. This collaboration may include experimentation and benchmarking that leads to top-tier AI research conference submissions ([example](https://icml.cc/virtual/2025/47854)).
  • Contribute to SDK and Frameworks design: As the number of supported models and workloads grow, you will see around corners and recommend scalable design patterns to absorb the code growth while minimizing technical debt.
  • Support Enterprise customers: You will directly work with the engineering teams of Enterprise customers during their onboarding journey. This could range from a Q&A session to customizing an Argmax feature to fit a particular customer requirement.
Desired Qualifications
  • 5+ years of hands-on experience in SDK or Frameworks development for iOS or Android
  • Track record of significant open-source contributions
  • Fluency in Swift, Kotlin and Python
  • Direct experience with Core ML, MLX Swift and LiteRT

Argmax enables on-device AI by running foundation models directly on user devices via an open-source platform and SDK, allowing offline, private, real-time, and cost-predictable inference without relying on cloud servers. Its FMOD suite includes WhisperKit Pro for speech-to-text and speaker recognition, and DiffusionKit Pro for running diffusion models, designed to work on a wide range of devices including older models. The company monetizes with Pro and Enterprise plans that use fixed per-device pricing and unlimited usage, targeting developers and enterprises in sectors like social media, gaming, and healthcare. Led by founders with deep Apple experience in on-device inference, Argmax aims to accelerate adoption of edge AI and provide private, secure, reliable, and scalable AI at the device level.

Company Size

11-50

Company Stage

Seed

Total Funding

$8M

Headquarters

Palo Alto, California

Founded

2023

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Simplify Jobs

Simplify's Take

What believers are saying

  • Salesforce Ventures led Argmax's $8 million seed, funding hiring and go-to-market expansion.
  • Superwhisper doubled free-trial conversion after switching onboarding to Parakeet powered by Argmax.
  • WhisperKit Pro and SpeakerKit Pro keep shipping, reinforcing Argmax's open-core developer moat.

What critics are saying

  • Argmax remains speech-focused; Cactus says it lacks LLMs, embeddings, and cloud fallback.
  • Apple Core ML and Meta ExecuTorch commoditize on-device inference, crushing Argmax pricing power.
  • Android GA on March 18, 2026 broadens reach, but Apple dependence still threatens survival.

What makes Argmax unique

  • Ex-Apple founders Atila Orhon, Zach Nagengast, and Brian Keene know Neural Engine optimization.
  • Argmax Pro SDK 2, launched April 7, 2026, adds speakers and custom vocabulary.
  • Detail, Heidi Health, and ModMed use Argmax for on-device transcription and editing.

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Benefits

Health Insurance

401(k) Company Match

Company Equity

Remote Work Options

Hybrid Work Options

Growth & Insights and Company News

Headcount

6 month growth

8%

1 year growth

8%

2 year growth

8%
Salesforce Ventures
Feb 9th, 2026
Welcome, Argmax! | Salesforce Ventures

Foundation models on device.