About Me

My skills, professional experience, education, and certifications.

DX Software Engineer

Sogo & Seibu

Hi 👋 I'm Yuta Asakura

I'm a Software Engineer based in Kawasaki, Japan. With a background spanning enterprise cloud architecture and full-stack web development, I love building things that actually reach users — whether that's migrating hundreds of databases at scale or crafting responsive frontends with React and Next.js. My tech journey took an unconventional path: 8 years in construction before pivoting into software engineering, which gave me a problem-solving mindset you don't pick up in a classroom.

Right now, I work as a DX Software Engineer at Sogo & Seibu, contributing to the in-house technology transformation of one of Japan's most historic retail brands.

🚀 I'm currently deepening my expertise in Next.js, TypeScript, and modern Full stack architecture while pursuing my CS degree at AMA University. I believe the best engineers never stop learning — and I'm always looking for the next challenge that pushes me further.

Skills

TypeScript

JavaScript

React

Next.js

Vue

TanStack Query

Zustand

Zod

Tailwind CSS

HTML

CSS

SASS

ShadCN/Radix UI

Experience

Sogo & Seibu Co., Ltd. (株式会社そごう・西武)

DX Software Engineer

Tokyo, Japan

May 2026 – Present

Department: Systems Department (DX Application Development) Contributing to enterprise digital transformation initiatives for one of Japan’s largest department store groups, supporting the transition from vendor-dependent systems toward in-house software development and modernization. Company Context: Sogo & Seibu operates iconic Japanese department store brands including Seibu (flagship in Ikebukuro) and Sogo, with roots dating back to 1830. Following acquisition by Fortress Investment Group in August 2023, the company is undergoing ambitious digital transformation—transitioning from vendor-dependent IT to building in-house development capabilities (自社開発).

Supporting modernization initiatives for internal enterprise systems and operational workflows across retail and e-commerce business units
Participating in cloud migration and cloud-ready architecture initiatives using Microsoft Azure and modern enterprise tooling
Assisting in the development and improvement of internal DX platforms, business applications, and workflow automation systems
Collaborating with internal stakeholders and external vendors to improve operational efficiency, documentation standards, and system maintainability
Supporting identity and access management (IAM), enterprise authentication, and role-based access control initiatives
Contributing to AI-assisted development workflows using GitHub Copilot and modern developer productivity tooling
Participating in enterprise reporting and analytics modernization efforts, including migration initiatives from legacy Microsoft Access and Excel-based workflows toward Power BI solutions
Working within an international engineering environment alongside teams across Japan and overseas locations

Technologies Used:

Microsoft AzurePower BIOracle DatabaseMicrosoft AccessGitHubGitCopilotVS CodeSalesforceTableauSnowflakeCommerableBacklogAWSPythonLinux

HCLTech (株式会社エイチシーエルジャパン)

Software Engineer (Database Migration Team Lead)

Tokyo, Japan · Hybrid

Apr 2025 – Apr 2026

Leading the database migration workstream for Nissan's enterprise cloud transformation, migrating 234 databases (647TB) across 151 applications from on-premises to AWS Tokyo Region.

Promoted mid-project from individual contributor to Database Migration Team Lead, managing a 5-member team of database SMEs across SQL Server, MySQL, PostgreSQL, and Oracle platforms
Served as primary point of contact for all database-related customer interactions across multi-vendor partnerships (Nissan, AWS, Fujitsu, HCL)
Architected 3 migration strategies (Native Backup/Restore, AWS DMS with CDC, Schema-level via SSMS), achieving 99.9% data integrity across all migrations
Designed multi-stage upgrade pipeline for SQL Server 2008–2019 → RDS 2022, including rollback strategies
Created 200+ page enterprise runbook templates adopted as the standard for all subsequent migration phases
Implemented cost optimization frameworks reducing test environment expenses by 60% through right-sizing
Delivered pilot migrations for 20 applications, establishing the scalable framework for production rollout
Led cross-regional coordination between teams in Japan, India, Singapore, Australia, and the Americas

Technologies Used:

AWSRDSEC2DMSS3VPCIAMCloudWatchMGNMSSQL (2008-2022)Oracle DBPostgreSQLMYSQLSSMSPowerShellAWS CLINative Tools (Backup and Restore)DatapumpCDC ReplicationJiraConfluenceMS TeamsOutlookSharepoint

TierLine Inc. (株式会社ティアライン)

Full-Stack Web Developer

Tokyo, Japan · Remote

Oct 2024 – Mar 2025

Built features for a live sports streaming CMS (VK Sports Bull Koshien) powering live broadcasts, match scheduling, and video replay for Japanese high school baseball tournaments nationwide.

Modernized the existing development environment: Dockerized the application, upgraded Java and Node.js versions, updated Yarn and project dependencies to improve build stability
Implemented a complex new delivery type (Self-Delivery Test) end-to-end: schedule registration modals with business rule validation, relay stadium screen UI updates, and CSV bulk import/export
Built AWS MediaLive integration including a scheduled batch service to automatically start/stop transcoder channels, real-time channel status polling, and channel ID extraction from database URLs
Developed Slack webhook notification system for real-time operational alerts and an automated reminder email batch processor with scheduled jobs
Collaborated in daily Agile standups with client (Asahi Shimbun/IIJ), managed Gitflow branching with code reviews, and deployed to AWS EC2 with Docker

Technologies Used:

ReactTypescriptJavaSpringbootMYSQLMyBatisAWSEC2GradleAWS MediaLiveYarnGitGithubBacklogBootstrapSlackSlack API

Watanabe Construction Industry Co. (株式会社渡部建設工業)

Construction Worker / Foreman

Yokohama, Kanagawa, Japan

Apr 2016 – Jun 2024

8 years in construction developing leadership, team coordination, and project management skills that now inform my approach to software engineering.

Supervised construction teams to complete scaffolding and building projects on time, ensuring safety and quality compliance
Coordinated with project managers, engineers, and contractors to optimize workflows and maintain project schedules
Trained and mentored team members on scaffolding techniques, safety protocols, and equipment use, fostering collaboration and skill development

Education

AMA University

Bachelor of Science in Computer Science

2024 – 2027

Currently pursuing while working full-time. Deepening knowledge in data structures, algorithms, database systems, software engineering, and web development.

Le Wagon Tokyo

Full-Stack Web Development Bootcamp

Computer Software Engineering

2024 – 2024

Intensive 400-hour full-time coding bootcamp focused on modern web development and AI integration. Collaborated on a full-stack project from ideation to production using Ruby, Ruby on Rails, JavaScript, PostgreSQL, Docker, Heroku, and OpenAI APIs. Designed, implemented, and deployed an AI-powered CRM-like tool (PRM) for managing personal relationships.

Southville International School and Colleges

Bachelor of Science in Information Technology

2012 – 2016

Certifications

Claude Certified Architect - Foundations

Anthropic

ID: fwfqcv9j4k3p

Earned Apr 2026

About Me

Hi 👋 I'm Yuta Asakura

Skills

Experience

Education

Certifications

Claude Certified Architect - Foundations

Microsoft Certified: Azure Fundamentals (AZ-900)

GitHub Copilot (GH-300)

GitHub Foundations (GH-900)

AWS Certified Solutions Architect – Associate (SAA-C03)

AWS Certified Developer – Associate (DVA-C02)

AWS Certified SysOps Administrator – Associate (SOA-C02)

AWS Certified Data Engineer – Associate (DEA-C01)

AWS Certified Machine Learning Engineer – Associate (MLA-C01)

AWS Certified AI Practitioner (AIF-C01)

AWS Certified Cloud Practitioner (CLF-C02)

Full-Stack Web Development Bootcamp

TOEIC Listening & Reading: 980

About Me

Hi 👋 I'm Yuta Asakura

Skills

Experience

Education

Certifications

Claude Certified Architect - Foundations

Microsoft Certified: Azure Fundamentals (AZ-900)

GitHub Copilot (GH-300)

GitHub Foundations (GH-900)

AWS Certified Solutions Architect – Associate (SAA-C03)

AWS Certified Developer – Associate (DVA-C02)

AWS Certified SysOps Administrator – Associate (SOA-C02)

AWS Certified Data Engineer – Associate (DEA-C01)

AWS Certified Machine Learning Engineer – Associate (MLA-C01)

AWS Certified AI Practitioner (AIF-C01)

AWS Certified Cloud Practitioner (CLF-C02)

Full-Stack Web Development Bootcamp

TOEIC Listening & Reading: 980