AI Application Engineer (Online Travel Service)

Skillhouse ·www.skillhouse.co.jp

Location Setagaya-ku, Tokyo, Japan
Salary JPY 8,000,000 - 11,000,000 / year
Type Full time
Level Mid
Source Shazamme
Software/Web Development English Site
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A Global IT Service firm is seeking an AI Application Engineer. 

Responsibilities:
- You will lead the development of next-generation AI agents
- Working closely with business stakeholders, you will drive the system design, implementation, and production operations of autonomous AI agents that support both end users and accommodation partners
- Design and develop AI agents for key business use cases such as search, booking, and customer support, including orchestration across MCP, tools, and backend systems
- Define functional and non-functional requirements for AI agents based on business needs and user pain points
- Implement and continuously improve AI agent and MCP platforms using LLM APIs (e.g., OpenAI, Vertex AI, Azure OpenAI) and modern agent frameworks
- Design context management through knowledge bases and RAG architectures, and integrate with internal and external APIs/systems (e.g., tool invocation, multi-agent communication)
- Define conversation-quality metrics, build automated evaluation and test cases, and continuously drive quality improvements based on user logs and feedback
- Own deployment, monitoring, and troubleshooting in production environments, and plan A/B tests to evaluate the effectiveness and improve the system
- Establish and refine development processes (e.g., Docker, CI/CD), providing technical leadership to the team through code reviews, mentoring, and knowledge sharing

Required skills:
- 5+ years of experience developing systems that incorporate machine learning/AI
- 2+ years of experience leading projects end to end, from system design to production release, for systems using machine learning/AI (experience with AI agent–related products is a strong plus)
- Hands-on experience developing AI agents/MCP using AI agent frameworks such as OpenAI Agent SDK, Google ADK, etc.
- Experience in context engineering to personalize AI agent behavior and optimize response quality
- Experience designing evaluation framework for AI agents and automating evaluation workflows
- Experience working in cross-functional teams
- Experience validating impact based on the product KPIs, and driving continuous improvement through A/B testing

Why should you apply:
- This is a long-term opportunity with a chance to become a permanent employee 
- You will be working with international team members 
- Free breakfast, lunch and dinner at the cafeteria 


Company Details: 
A global company with a strong presence in multiple business areas. It has achieved sustained growth both domestically and internationally, including in the U.S. and Europe. The company boasts a diverse and international environment and is committed to equal opportunity, offering a wealth of career opportunities. Due to the diverse nature of our business, we handle a wide range of technologies! You can also choose the environment you are most comfortable with, such as Windows/Mac! Meals in the company cafeteria are also free. Our chefs are always coming up with new menu items, so you can enjoy your meal without getting bored!

Working hours: 9:00 - 17:30 (Mon-Fri)
Working Style: Hybrid (4 days in office, 1 day work from home)
Holidays: Saturday, Sunday, and National Holidays, Year-end and New Year Holidays, Paid Holidays, Other Special Holidays
Services/Benefits: Social insurance, Pension Plan,Childbirth, Childcare, and Caregiving, Transportation and so on.
Interview Process: 3 times

Frequently asked questions

Who is hiring for the AI Application Engineer (Online Travel Service) role?
Skillhouse is hiring for the AI Application Engineer (Online Travel Service) position, a Shazamme client. Apply directly on the employer's career site.
Where is the AI Application Engineer (Online Travel Service) job located?
The AI Application Engineer (Online Travel Service) role with Skillhouse is based in Setagaya-ku, JP.
What does the AI Application Engineer (Online Travel Service) role pay?
Skillhouse lists the AI Application Engineer (Online Travel Service) role at JPY 8,000,000–11,000,000 per year.
Is the AI Application Engineer (Online Travel Service) role full-time or contract?
This is a full time position at Skillhouse.
What experience level is the AI Application Engineer (Online Travel Service) role?
The AI Application Engineer (Online Travel Service) position is aimed at mid-level candidates.
How do I apply for the AI Application Engineer (Online Travel Service) role at Skillhouse?
Apply directly on Skillhouse's career page via the Apply button on this listing. ZammeJobs links straight through to the employer's ATS — no third-party form, no resume database.
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