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Skills

Sr Frontend Developer

I love creating something that is clean and minimalistic, attractive and has value, and of course, easy to use.   

Skilled Backend Developer

I possess a penchant for crafting scalable Back-End code, meticulously adhering to established coding standards and best practices.   

AI & Agent Engineer

Proficient in designing, building, and optimizing agentic AI systems, RAG pipelines, and LLM applications.
Consistently delivers production-ready, cost-optimized solutions while setting and surpassing ambitious goals.    

Top quality

Top Qaulity

Teamwork adds new strength to each person
By fostering a culture of teamwork, I leverage diverse talents and perspectives to achieve remarkable outcomes. Together, I strive to exceed expectations and deliver top-tier results in everything I do.

Communication Skill

Communication

I strive to solve our customers' problems through clear communication.
By actively listening and articulating ideas with clarity, I ensure that issues are addressed promptly and solutions are developed collaboratively.

Summary

Fullstack & AI Engineer with hands-on production experience building agentic AI systems using Google's Agent Development Kit (ADK), Vertex AI Agent Engine, and modern RAG architectures. Japan-based with Tokyo industry experience deploying end-to-end LLM applications that combine FastAPI, Next.js, and Model Context Protocol (MCP) tooling. Skilled at turning AI prototypes into production-ready, cost-optimized cloud microservices.
Available immediately for remote AI Engineering roles or visa-sponsored positions.

To connect with me personally

Discord ID: fam_unicorn

My Experience
100
%
Aug 2025 ~ Present

Independent AI Engineer

Freelance — Remote

  • Designed and deployed multi-agent systems on Google Vertex AI Agent Engine, including a Growth Partner Agent with secure authentication and agent-as-a-tool composition.
  • Built a production-grade RAG pipeline using Google's RAG Engine: automated corpus management, chunking, embedding, and custom retrieval tools for client knowledge bases.
  • Delivered self-hosted Nextcloud infrastructure to replace Google Drive, with automated backup scheduling and disaster recovery, cutting cloud storage spend by an estimated 60–70%.
  • Co-explored an early-stage AI venture: applied to Y Combinator and Antler, sharpening GTM and product narrative through applications and interviews.

    • Multi-Agent Systems
    • RAG Engine
    • MCP & Claude Code
    • Cloud Deployment
    100
    %
    Aug 2022 ~ Nov 2025

    Force Equals Inc

    AI Backend Engineer — Remote

  • Deployed six specialized agents responsible for task decomposition, tool selection, RAG search, and business-logic execution, with an escalation function for issue handling.
  • Connected agents to internal APIs, PostgreSQL databases, and external services, with robust error handling, state persistence, and monitoring.
  • Added knowledge-base and structured-data integration, an evaluation pipeline (Ragas), and a caching layer — achieving over 92% factual accuracy on production queries.
  • Built a standalone multimodal backend service (FastAPI) for processing audio, images, and video using YOLOv8 and TTS models.

    • Multi-Agent Backend
    • RAG & Evaluation
    • FastAPI Services
    • Monitoring
    100
    %
    May 2019 ~ Jul 2022

    Oplus 株式会社 (Oplus Inc.)

    Full Stack Developer — Tokyo, Japan

  • Implemented employee shift submission, manager shift creation/modification, real-time work-schedule checking, and attendance tracking.
  • Developed a responsive, user-friendly interface supporting both web and mobile apps.
  • Drove high adoption with powerful yet simple approval, coordination, and oversight tools for administrators.
  • Contributed to rapid iterative development during the platform's early growth phase, helping scale the user base to thousands of enterprises.

    • Shift Management
    • Web & Mobile
    • Real-time Scheduling
    • Attendance Tracking

    FAQ

    Most frequently asked questions you may check before getting started.

    Want to check my previous projects? Simply open "Project" connect Connect with me today to make your vision a reality.

    Yuki Nakamura is a Fullstack & AI Engineer specializing in agentic AI systems, RAG pipelines, and end-to-end LLM applications.
    I'm passionate about turning AI prototypes into production-ready, cost-optimized solutions for clients.

    As a full-stack developer, I offer comprehensive development services including front-end and back-end design and implementation, API integration, and security enhancements. My expertise covers various frameworks and technologies including React, Angular, Node.js, and Python.

    I build agentic AI systems on Google Vertex AI Agent Engine and the Agent Development Kit (ADK), with multi-agent orchestration, secure authentication, and agent-as-a-tool composition. I design production RAG pipelines with Google's RAG Engine and vector databases, and integrate LLMs into existing applications via FastAPI and Model Context Protocol (MCP) tooling.

    Security is paramount in my development process. I implement best security practices including input validation, secure session management, and encryption. For AI systems, I add evaluation pipelines, monitoring, and safe authentication.

    I start with a thorough analysis of the client's requirements, followed by a detailed proposal of solutions. Development is executed in iterations with frequent feedback loops, ensuring alignment with client expectations. The process includes comprehensive testing and deployment support.

    Yes, I have extensive experience designing and integrating RESTful APIs and GraphQL services. This includes authentication, data handling, and optimizing connectivity between front-end and back-end systems. click Here.

    I am proficient in Python and JavaScript / TypeScript (React, Next.js, Node.js), with SQL and Bash. I work daily with FastAPI, LangChain, the Google ADK, Docker, and Google Cloud (Vertex AI, Cloud Run).

    I implement robust data management solutions including database design, data migration, and performance optimization. I work with relational databases like PostgreSQL and MySQL, as well as NoSQL databases like MongoDB.

    Post-launch, I offer maintenance and updates for applications to ensure they operate smoothly and securely. This includes performance monitoring, security updates, and feature enhancements as needed.

    Certainly! Please visit the [Projects] section of my website to see detailed case studies of my past projects, including AI engineering and full-stack development.
    click Here

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