Bjak

AI Phone - On-device AI / ML Systems Engineer

South Korea full-time Senior Salary not listed
full-time Senior level Technology & IT Curated
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About the role

About
We are reimagining the phone. AI phones need to be proactive, intuitive, intelligent and low cost. This is a mission critical for rest of the world to adopt intelligence.
There are over 5 billion people using everyday applications such as email, messaging, notes, tasks, and calendars, yet most are not AI-native. Our mission is to build proactive applications and devices that bring intelligence into daily conversations, coordination and workflows, with minimal prompting.
Responsibilities

Evaluate suitable open-weight and commercially available models for on-device execution.

Benchmark model performance on target mobile hardware.

Integrate models into Android applications and system services.

Optimize inference latency, memory consumption and power usage.

Evaluate quantization, compression and model distillation techniques.

Work with CPU, GPU and NPU acceleration.

Evaluate local model capabilities for different workflows.

Build hybrid local/cloud model routing mechanisms.

Identify which tasks can be handled locally and which require cloud inference.

Work with AI agent engineers to integrate local models into the agent runtime.

Requirements

Strong ML systems or inference engineering experience.

Experience deploying and optimizing models.

Strong Python and C++ skills.

Understanding of neural network inference.

Experience with model quantization and performance optimization.

Understanding of hardware constraints and inference benchmarks.

Nice to have

Experience with on-device LLMs.

Qualcomm QNN, MediaTek NeuroPilot or similar acceleration frameworks.

ONNX Runtime, LiteRT, TensorFlow Lite or ExecuTorch.

Android NDK.

Mobile or edge AI deployment.

Multimodal model optimization.

Originally posted on Himalayas

Interview prep

Walk in with sharper answers.

Use this as a quick practice sheet before you speak with the employer.

Senior
Technology & IT Python Phone Device Systems Engineer Senior level

Likely questions

  1. Tell us about work you have done that is close to the AI Phone - On-device AI / ML Systems Engineer role.
  2. How would you approach your first 30 days at Bjak?
  3. Which of Python, Phone and Device have you used recently, and what did it help you achieve?
  4. How have you led people, improved a process, or made a hard decision in a previous role?
  5. How do you handle busy days, changing priorities, or pressure at work?

Prepare before the call

  • A recent example that proves your experience with Python, Phone and Device.
  • One short story with a problem, your action, and the result.
  • Two examples that show the strengths listed on your CV.
  • A clear reason why this role and company interest you.
  • Your availability, preferred work style, and salary expectations.

Ask them

  • What would success look like in the first 90 days?
  • What are the main problems this hire should help solve?
  • How does the team give feedback and measure good work?
  • What does a normal working week look like for this role?
Practice line

I am interested in the AI Phone - On-device AI / ML Systems Engineer role because I can bring practical experience in Python, Phone and Device, learn the team quickly, and contribute to the outcomes Bjak needs from this hire.

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