Bjak

AI Phone - AI Systems / Agent Architect

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.
Focus: Agent runtime, context, memory, orchestration and overall AI system architecture.
Responsibilities

Define the overall AI architecture for the phone.

Design how AI agents interact with the OS and applications.

Define agent runtime and orchestration architecture.

Design context and memory systems that allow AI to understand user activities, preferences and ongoing tasks.

Define how agents execute multi-step workflows across different applications.

Design long-running task execution, state management and recovery mechanisms.

Define model routing between on-device and cloud models.

Evaluate the feasibility of running different AI capabilities locally versus remotely.

Work with Android engineers to define the interfaces required for system-level AI execution.

Establish reliability, observability and evaluation standards.

Requirements

Strong backend and distributed systems engineering experience.

Experience building production AI agent systems or complex orchestration systems.

Strong understanding of LLMs, tool calling, structured outputs and agent execution.

Experience with stateful workflows and multi-step task execution.

Experience with context engineering, retrieval and memory systems.

Strong system design and architecture skills.

Ability to work across backend, AI and platform engineering.

Nice to have

Experience building AI assistants or agent platforms.

Experience with long-running autonomous workflows.

Experience with model routing and inference optimization.

Experience with on-device AI or hybrid local/cloud architectures.

Experience with permission-aware tool execution and agent security.

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 Phone Systems Agent Architect Technology Senior level

Likely questions

  1. Tell us about work you have done that is close to the AI Phone - AI Systems / Agent Architect role.
  2. How would you approach your first 30 days at Bjak?
  3. Which of Phone, Systems and Agent 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 Phone, Systems and Agent.
  • 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 - AI Systems / Agent Architect role because I can bring practical experience in Phone, Systems and Agent, learn the team quickly, and contribute to the outcomes Bjak needs from this hire.

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