Bjak

AI Phone - On-device AI / ML Systems Engineer

United Kingdom
Level
Mid
Work type
Hybrid

Not stated in the posting: salary, visa.

Open. First seen 4 November 2026.

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.

What this role asks for

Particular to this role

C++ · TensorFlow

Rare in Bjak's other 299 open postings.

Standard for data science / ML roles

LLM · Python

Common in data science / ML postings at any company.

Compared with Bjak's other open jobs.

The team: ActAI - Realware NEW TEAM

This team is new: its 84 open roles were posted Nov 4, and Bjak had none in it before. You would be one of its first people.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

Android (54 of 84), LLM (36 of 84), C++ (30 of 84), Java (18 of 84), Kotlin (18 of 84), Linux (12 of 84), Machine Learning (12 of 84)

OTHER ROLES ON THIS TEAM

From the team and dates on Bjak's own job board.

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