Resume

Basic Information

Key	Value
Name	Takaya Ebino
Date of Birth	March 18, 1999
Education	Osaka University, School of Engineering, Applied Science and Engineering

Summary & Key Strengths

Software engineer with 3 years of full-stack engineering experience, specializing in payment system development and team management as a Scrum Master.

Core Strengths:

Extensive hands-on experience in payment system design and implementation (Amazon Pay, GMO, Stripe)
Database design for complex requirements and system design with eventual consistency in microservice environments
Team management experience leading a 7-member team as Scrum Master
Full-stack development using Ruby on Rails, Java/Spring Boot, TypeScript (React/Vue)

Technical Achievements:

Stable operation of high-traffic live streaming applications
Implementation of multiple payment services (Amazon Pay, Apple Pay, Google Pay)
Led a phased payment system migration project (Stripe→GMO)
Infrastructure construction and maintenance in AWS environments

Technical Skills

Languages

Frameworks & Technologies

Specialized Areas

Payment system design and implementation (Amazon Pay, GMO Payment Gateway, Stripe)
System design with eventual consistency in microservice environments
Database design for complex requirements
Team management (Scrum Master)
Infrastructure construction and maintenance in AWS environments

Professional Experience

STORES, Inc. | Software Engineer (February 2025 - Present)

[Project 1] STORES Payment and STORES Integration Enhancement
Period: February 2025 - May 2025 | Team Size: 8 people | Technology: Java 8, Spring Boot

Responsibilities & Achievements:

Implemented STORES login support for STORES Payment using OIDC
Developed data integration features with STORES onboarding service
Handled service design with eventual consistency across multiple services
Enhanced inter-service integration through improved usability

[Project 2] STORES Booking Payment System Migration
Period: June 2025 - December 2025 | Team Size: 4 people | Technology: Rails 8, Ruby 3.4

Responsibilities & Achievements:

Server-side implementation of GMO payments and frontend implementation including 3D Secure authentication
Achieved independence from Stripe dependency for review and deposit operations
Realized cost reduction and improved stability through in-house payment system development

DeNA Co., Ltd. | Software Engineer (April 2022 - December 2024)

[Project] Voice Pococha
Period: July 2022 - December 2024 | Team Size: 7 people | Technology: Ruby on Rails, Vue(TypeScript)

Year 1 (July 2022 - June 2023): Engineer

Server development and operation of high-traffic live streaming application
Database design and development for new features
CS investigation and incident response in AWS infrastructure environment
Container-based development and operations using Docker and AWS ECS

Year 2 (July 2023 - June 2024): Development Leader

Project progress management and coordination as development leader for 6-month projects
Database design for new features considering scalability
Progress management of team development using Scrum methodology

Year 3 (July 2024 - December 2024): Scrum Master

Supported team productivity improvement as Scrum Master for 7-member engineering team
Progress management of member tasks for each sprint
Support for task estimation and sprint planning

Payment Feature Achievements:

Implementation of Amazon Pay payment functionality
Implementation of Apple Pay payment functionality using GMO Payment Gateway
Implementation of Google Pay payment functionality using GMO Payment Gateway

Additional Professional Experience

Glasp, Inc. | Frontend Engineer (Contract)

_Period: April 2024 - May 2024

Team Size: 3 people

Technology: Next.js, Firebase_

Frontend development using Next.js and Firebase
Component development using SSR with Next 14
NoSQL database design using Firestore

Purpom Media Lab, Inc. | Full-Stack Engineer (Contract)

_Period: July 2023 - February 2024

Technology: Next.js, NestJS + Prisma(TypeScript)_

Ad Delivery Management Service (October 2023 - February 2024)

Frontend development using Next.js, REST API, and OpenAPI
Component-driven development using React Material UI

Care Benefit Operations Tool (July 2023 - October 2023)

Frontend development using Next.js and GraphQL
GraphQL development using Apollo Client
Backend development and testing using NestJS and Prisma
Creation of Services and Resolvers using @nestjs/graphql
Creation of unit tests and integration tests using Jest

DeNA Co., Ltd. | Internal Student Intern (June 2021 - October 2021)

Pococha Web
Period: June 2021 - October 2021 | Team Size: 6 people | Technology: Next.js(TypeScript), Storybook, Cypress, MSW

Component-driven SPA development using Next.js, Storybook, and MSW
Creation of common components and improvement of existing components within the project
E2E test improvement using Cypress
Introduced E2E (End-to-End) testing on Circle CI and improved test coverage

Education

Osaka University, School of Engineering, Applied Science and Engineering (April 2018 - March 2022)

Self-Introduction

Engineer who continues to grow in both technical skills and leadership

Through my 2 years and 9 months of experience at DeNA, I have gradually built my career from engineer to Scrum Master, developing both technical and management skills. I have particular experience in payment system design and implementation, having worked with multiple payment services including Amazon Pay, GMO Payment Gateway, and Stripe. I am currently handling a payment system migration project at STORES, Inc.

I also have experience in scalable system development, including system design with eventual consistency in microservice environments and stable operation of high-traffic live streaming applications. I look forward to leveraging these experiences to tackle even greater technical challenges in the future.