IDE

Professional Summary

  • 4 years building aerospace R&D systems and global financial infrastructure
  • Owns backend features end-to-end within Japanese enterprise SDLC environments
  • Deep experience with transactional systems, database design, messaging stacks, and AWS-based automation

Technical Skills

Languages:
Java, C#, Python

Backend & Frameworks:
Spring Boot, MyBatis, REST API Design, OpenAPI

Databases:
PostgreSQL, CockroachDB, DB2, Oracle, SQL Server

Messaging & Integration:
MQTT, IBM MQ, JSON APIs

Cloud & Infrastructure:
AWS (EC2, Lambda, IAM, CloudWatch, VPC, Elastic IP), Docker, Linux

Tools & Workflow:
Git, Gradle, Jenkins, Postman, CI-based PR workflow

Process:
Japanese SDLC (基本設計 / 詳細設計), Agile Scrum

Professional Experience

Backend Engineer – Aerospace / UAS Systems (2024–Present)

Client: NEC (via ADI, Haken)

Worked across multiple aerospace R&D systems including flying car UAS infrastructure, air traffic management platforms, and drone safety & routing systems in Japan.

Responsibilities:

  • Owned backend features end-to-end (Requirements → DB design → 基本設計 / 詳細設計 → Implementation → Testing → PR)
  • Designed relational database schemas (PostgreSQL, CockroachDB)
  • Implemented transactional business logic using Spring Boot (@Transactional)
  • Developed REST APIs aligned with OpenAPI specifications
  • Implemented MQTT-based messaging and asynchronous processing components
  • Optimized SQL queries and pagination for large datasets
  • Implemented operational safety validation logic
  • Produced technical documentation in Japanese
  • Collaborated within a 20-engineer multi-company Japanese team
Focus Stack
Languages & Frameworks Java, Spring Boot, MyBatis
Data & Messaging PostgreSQL, CockroachDB, MQTT
Infrastructure & Tooling AWS, Docker, Gradle, Git

Backend Engineer – Finastra (2019–2022)

Banking Payment Systems

Backend development for Payment Fusion serving large commercial banks worldwide.

Responsibilities:

  • Implemented payment product features compliant with SWIFT, SEPA, and QATCH standards
  • Developed financial message flow logic using IBM MQ
  • Ensured compatibility across DB2, Oracle, and SQL Server
  • Provided real-time production support for banking client environments
  • Collaborated directly with bank-side engineers during deployments
  • Participated in Agile sprint cycles and release coordination
Focus Stack
Core Backend Java, Spring Boot
Messaging IBM MQ
Databases DB2, Oracle, SQL Server
Tooling Jenkins, Git

Education & Development

Japanese Language Studies – Kyoto (2022–2024)

Full-time Japanese language study focused on business communication and professional integration in Japan.

Selected Engineering Projects

AWS-Based Server Automation Platform with Discord Integration (Ongoing)

Designed and implemented an event-driven AWS infrastructure to automatically manage multiplayer servers through a Discord bot integrated with AWS Lambda.

Key Contributions:

  • Automation & Control: Discord bot slash commands trigger AWS Lambda workflows, with EC2 start/stop orchestration and lifecycle rules tied to active players.
  • Cost & Monitoring: Integrated AWS Cost Explorer for month-to-date visibility, tuned instance families (t2/t3a/t3g/c6a) for CPU-credit efficiency, and aligned runtime with usage patterns to cut spend.
  • Infrastructure & Ops: Managed Elastic IPs, VPC networking, and IAM; automated Linux server provisioning via SSH to keep multiplayer hosts patched and healthy.
Tech Stack
AWS EC2, AWS Lambda, IAM, CloudWatch, Cost Explorer API, VPC, Elastic IP, Linux, Python (boto3), Discord API, SSH

IMU Noise Filtering and AR Integration (Undergraduate Thesis, 2019)

Research project focused on improving motion tracking through sensor fusion and filtering algorithms.

Tech Stack
Python, Jupyter Notebook, Unity (C#), ARCore, Android Studio

Portfolio Site

This website built using Jekyll and GitHub Pages.

Tech Stack
Jekyll, HTML/CSS