Projects: 

• Calculate api - is a micro service for calculate promotions discounts with checkout.

- Mentoring team members implement new promotion features.

- Implementing backend application with Golang, and use fx package make feature modularize.

- Implementing application connect MongoDB and use ODM(mgm).

- Implementing application connect PostgresSql and use ORM(bun).

- Using gRPC to tandem core system.

- Implementing monitor with Grafana and New Relic.

- Implementing CICD with bitbucket pipeline and terraform create CD role.

- Implementing Auto Scaling with helm and AWS EKS. 

• Cart service - is a micro service for storing the shopping cart data. 

- Researching AWS RDS for make service can accept 5000 rpm data , and setup postgreSQL by terraform. and using TypeORM    transaction set serializable isolation to avoid race condition.

- Implementing backend application from search NestJS, Typescript, TypeORM and PostgresSql, develop all function independently within half a year.

- Using gRPC to tandem core system.

- Implementing monitor with Grafana and New Relic.

- Implementing CICD with bitbucket pipeline and terraform create CD role. 

- Implementing Auto Scaling with helm and AWS EKS.

• CRM Feature module - it contains multiple promotions and CRM feature.

- Optimizing checkout time by enhance apply promotion calculation time, 40% reduction in required time by filter out cannot apply promotions, ex: invalid products or category, or invalid coupon code.

- Develop and maintain multiple promotion application logic, ex: priority order, full item, full amount. calculate the maximum discount amount, and modularize various types of discounts to reduce the modified test range.

- E-commerce user credit and member point apply to discount order total amount. 

• Sync Social User - is an AWS API Gateway to pass social platform user data enqueue AWS SQS, and dequeue by ruby worker.

- Building API Gateway and SQS with Terraform.

- Implementing dequeue worker with ruby gem shoryuken.

- Cooperating with cross border team for sync social platform data. 

• FB live shopping - sync j live shopping cart data to core system

- Implementing deployment AWS Lambda storing shopping cart data to DynamoDB with serverless.yml.

- Integrate fb live cart and e-commerce shopping cart with cross border team. 

• Cross border 7-11 pick up/post - Integrate 7-11 api to implementing cross border delivery

- Tandeming 7-11 cross border api.

- Collaborating with 7-11 engineer and PM to implement logistic functions.

- Using deploy job(Backburner) to get shipping label.

• Job Service - is for Import a great amount of data.

- Using Sidekiq to duque greate amount data, ex. 30000 users, 20000 products.