AI Builder / AI Agent Engineer – Japan Market

Company

FPT Smart Cloud (FPT.AI)

Location

Vietnam/JP

Employment

Full-time

Market

Japan

1. About the Role

We are looking for an

AI Builder / AI Agent Engineer

to join FPT Smart Cloud's AI Consulting & Delivery team and support the expansion of FPT.AI's AI Agent solutions in the

Japanese market

.

In this role, you will be responsible for

building, integrating, deploying, testing, operating and maintaining AI Agents for enterprise customers

.

You will work closely with Japanese customers, Business Consultants, Solution Architects, Product Managers and Software Engineers to turn business requirements into production-ready AI Agent solutions.

The AI Agents may include

• AI Voice Agents / Voicebots

• Conversational AI Agents

• Customer Service Agents

• Enterprise Knowledge Agents / RAG Agents

• Task-oriented AI Agents

• AI Agents integrated with enterprise applications and workflows

• Other Agentic AI solutions developed or provided by FPT.AI

The position is highly hands-on. You will use FPT.AI platforms and other AI technologies to

configure/build AI Agents, connect enterprise data and systems, test and optimize their performance, deploy them into production, and continuously maintain and improve them.

2. Key ResponsibilitiesA. AI Agent Building & Configuration

• Build and configure AI Agents based on customer business requirements.

• Configure AI Agent workflows, prompts, tools, knowledge bases, business rules and conversation flows.

• Build AI Voice Agents using FPT.AI Voice/Conversational AI platforms.

• Configure RAG / Knowledge Base solutions for enterprise AI Agents.

• Design Agent instructions, system prompts, guardrails and fallback mechanisms.

• Configure multi-step Agent workflows and tool/function calling.

• Customize AI Agent behavior for specific customer domains and business processes.

• Continuously experiment with different models, prompts, retrieval strategies and Agent configurations to improve performance.

B. Enterprise Data & System Integration

• Connect AI Agents with customer enterprise data and knowledge sources.

• Integrate AI Agents with APIs, databases, CRM, contact-center platforms and enterprise applications.

• Configure data ingestion and synchronization pipelines for AI Knowledge/RAG systems.

• Work with customer technical teams to understand APIs, authentication, data structures and system architecture.

• Implement or configure API/function/tool integrations that allow AI Agents to perform business actions.

• Support integration with systems such as CRM, ERP, ticketing systems, knowledge management systems and internal applications.

C. Testing & Quality Assurance

• Design and execute test cases for AI Agents.

• Test conversation flows, knowledge retrieval, tool calling, business logic and edge cases.

• Conduct functional testing, regression testing and scenario-based testing.

• Evaluate AI Agent accuracy, relevance, latency, stability and user experience.

• Analyze failed conversations and identify root causes.

• Optimize prompts, knowledge bases, retrieval strategies and Agent workflows based on test results.

• Support UAT with enterprise customers.

D. Deployment & Go-Live

• Prepare AI Agents for production deployment.

• Configure production environments and deployment parameters.

• Support integration testing and customer acceptance testing.

• Monitor AI Agent performance during pilot and production rollout.

• Troubleshoot issues during go-live and production operation.

• Work with internal Engineering / DevOps / AI teams to resolve technical issues.

E. AI Agent Operation & Maintenance

• Operate and maintain AI Agents after deployment.

• Monitor Agent performance, errors, latency, conversation quality and system health.

• Investigate and resolve production issues.

• Update prompts, knowledge bases, workflows and integrations when business requirements change.

• Continuously improve AI Agent performance based on real customer interactions and operational data.

• Maintain Agent configurations, technical documentation and deployment records.

• Support incident management and root-cause analysis.

F. Customer Collaboration – Japan

• Work directly with Japanese enterprise customers during implementation and operation.

• Understand customer business processes and translate requirements into AI Agent configurations.

• Participate in workshops, requirement clarification, technical discussions, testing and UAT.

• Explain AI Agent behavior, limitations and operational considerations to customers.

• Coordinate with Japanese Sales, Consulting, PM and Solution Architect teams.

• Support PoC, Pilot and production deployment projects.

3. Typical Project Lifecycle

The AI Builder will participate in the full AI Agent lifecycle:

Business Requirement → Solution Design → AI Agent Building → Data / API Integration → Testing → UAT → Deployment → Go-Live → Monitoring → Maintenance → Continuous Optimization

You will therefore be expected to understand not only how to

build an Agent

, but also how to make it

work reliably in a real enterprise production environment

.

4. Technology Scope

The candidate will work with FPT.AI platforms and technologies, including but not limited to:

FPT.AI Platforms

• FPT.AI Agent

• FPT.AI Voice Agent / Voicebot

• FPT.AI Engage

• FPT.AI Knowledge / Enterprise Knowledge solutions

• FPT.AI Chat / Conversational AI

• FPT GenAI Studio

• Other FPT.AI Agentic AI platforms and products

AI / GenAI Technologies

• LLMs

• Generative AI

• AI Agents / Agentic AI

• RAG

• Prompt Engineering

• Function Calling / Tool Calling

• Knowledge Base

• Embeddings / Vector Search

• STT / TTS

• Conversational AI

• Guardrails and AI evaluation

Integration Technologies

• REST API

• JSON

• Webhooks

• SQL / Databases

• Authentication / Authorization

• CRM / ERP / Contact Center systems

• Enterprise applications

• Cloud platforms

Note

The role is not limited to FPT.AI technologies. Candidates may be required to work with third-party AI models, Agent frameworks, cloud services and enterprise technologies depending on customer requirements.

5. Required QualificationsTechnical Skills

• 2+ years of experience in software engineering, AI engineering, solution engineering, implementation engineering or a related technical role.

• Experience building, configuring or implementing

AI / GenAI applications

.

• Understanding of

LLM, Generative AI and AI Agent concepts

.

• Experience with

Prompt Engineering and RAG

is preferred.

• Experience integrating systems through

REST APIs

.

• Basic understanding of databases and data structures.

• Ability to troubleshoot technical issues and analyze system behavior.

• Ability to work with logs, test results and operational data.

• Basic programming/scripting skills in

Python, JavaScript/TypeScript or similar languages

.

AI Agent Skills

Candidates should have a strong interest in hands-on AI Agent development and be comfortable with:

• Designing Agent instructions and prompts.

• Building Agent workflows.

• Connecting Agents to tools/APIs.

• Configuring knowledge bases and RAG.

• Testing Agent responses and business scenarios.

• Debugging Agent behavior.

• Evaluating AI output quality.

• Iteratively optimizing Agents based on production feedback.

Experience with platforms such as

Microsoft Copilot Studio, Google Vertex AI, AWS Bedrock, LangChain, LangGraph, Dify, Salesforce Agentforce, Kore.ai, Cognigy, Yellow.ai

or similar platforms is a strong advantage.

6. Japan Market Requirements

Because this role will primarily support Japanese enterprise customers, the following are highly valued:

Japanese Language

• Japanese: JLPT N2 or above

preferred.

• Able to communicate with Japanese customers in technical/business discussions.

• Able to read Japanese technical documents, specifications and customer requirements.

• Japanese business communication and working etiquette are highly valued.

Customer-facing Capability

• Comfortable working directly with enterprise customers.

• Able to clarify ambiguous requirements and convert them into concrete technical tasks.

• Strong communication and documentation skills.

• Ability to explain technical concepts in a simple and structured manner.

• Willingness to work in a customer-oriented delivery environment.

Experience working with Japanese customers or in Japan is a strong advantage.

7. Preferred Qualifications

Candidates with one or more of the following will have an advantage:

• Experience implementing

AI Agent / GenAI solutions for enterprise customers

.

• Experience with

Voicebot / Contact Center AI / Conversational AI

.

• Experience with RAG / Enterprise Search / Knowledge Management.

• Experience with LLM APIs such as OpenAI, Gemini, Claude or equivalent.

• Experience with Agent frameworks such as LangChain / LangGraph or similar.

• Experience with cloud platforms: AWS, Azure or Google Cloud.

• Experience with CRM, ERP, Contact Center or enterprise workflow systems.

• Experience in PoC → Pilot → Production deployment.

• Experience supporting production AI systems.

• Experience working with Japanese customers.

• Japanese JLPT N1 is a strong plus.

• English communication skills are a plus.

8. Personal CompetenciesCustomer-oriented

Able to understand the customer's real business problem rather than simply implementing technical requirements.

Problem-solving

Able to investigate issues systematically and find practical solutions in ambiguous and rapidly changing AI environments.

Hands-on & Execution-oriented

Willing to configure, test, debug and operate AI Agents directly rather than only producing technical documents.

Fast Learner

Generative AI and Agent technologies evolve rapidly. The candidate should be able to quickly learn new models, platforms and tools.

Attention to Detail

AI Agents are highly sensitive to prompts, data quality, business rules and edge cases. Strong attention to detail is essential.

Collaboration

Able to work effectively with

• Japanese customers

• Business Consultants

• Project Managers

• Solution Architects

• AI Engineers

• Software Engineers

• Product Managers

• Operation / Customer Success teams

09. Career Opportunity

This role provides an opportunity to become a core member of FPT.AI's

AI Agent delivery capability for the Japanese market

.

Successful candidates can grow toward

AI Builder → Senior AI Builder → AI Agent Solution Engineer → AI Agent Solution Architect → AI Consulting / Delivery Lead