Hyun Joon Park Email & Phone Number

South Korea

백엔드 개발자

토스 모바일 서버 개발

Seoul

Implement Payment Server Periodic Payment (2021.8 to 2022.7)- Added Payment Server Subscription Payment- Modeling and service design, including Notification Service, Payment Queued Event Service, and PutSubscriptionTransaction.- Creating Domain Event Propagation Codes Using Amazon MQ- Enhance payment stability by receiving payment events using bill Id- Add PubSub settings for regular payment and event listening in the Play Store- Set App Store's regular payment event Webhook- Add Spring Batch, Spring Quartz, and Payment-batch projectsDevelopment and maintenance of authentication servers (2021.4 to 2021.7)- Line login, Facebook login, Apple login development- Changed Apple Public Key (JWKS) to request new from AppleRestApiService every time.- Add kakao Unlink API- Adding Email Verification Logic- Add ValidateEmail, SendAuthenticationEmail, CheckAuthenticationEmailrpc, EmailAuthenticationHistory API- Authentication server asymmetric key exchange and JWKS support- - Add NewJwtService, PemUtils, JwkSetRestController, Add GetJwks rpc for supplying JWKS- Change to replace with asymmetric key tokens while maintaining backward compatibilityPayment Server Single Payment and Payment Admin Configuration- Add administration-related logic such as Refund, Manual Refund, and payment event generation- Developed to support Stripe, Naver Pay, KCP, and Kakao Pay payment methods- Change project structure to isolate deployment units and make adding features easier.- Separate existing payment-server into multi-module projects such as util, test, model, infra, service, server, admin, etc- Add logic and GrpcExtensions for handling exceptions, introduce springmockk and add mocking test cases- Centralized management of error value control due to parameter validation- Attempt to deploy Proto Validation- Spring Bean Validation and AOP Settings for Parameter Validation

- Node with typescript, docker-compose, sequelize - ECS call TakeScreenShot Lambda using Private API Gateway- OAuth2 Server with JWK Set with caching interface- Admin with custom action- Async Worker with SQS, Celery

Seoul

- Java Spring- VisitorGroup, Loyalty, Cohort Report Client Side develop & RealtimeController Develop- Dervied Measure Operation using ANTLR & CaptureGroup seperate logic Server Side Develop

- Web Server OAuth logic reform & add email verification. - Apply normalization to user table and do db migration.- Atomize and documentate REST API error handling.- User inflow detection logic change.

Seoul, Gangnam

Pluto Network (Decentralized Scholarly Communication on Ethereum)- Paper Search Web Client Develop (Connect with REST API, React, typescript, Lambda, Serverless)- Declaration Web Client Develop (Animation, Responsive Styling, Image uploading following Lambda & SNS Share) - Google Analytics Manage (Default View, Filter setting)

Seoul, Yeouido

- WAF SSL Issuing Client & Web Client Develop (SSL CA Cost reduce) - Client Health Check Alarm Server Refactoring

Seoul, Seolleung

- Admin Page Develop (User Action / Marketing Index Tracking)