- Provided guidance and led 5 developers, and coordinated all development work in a timely manner. - Worked closely with the Project Manager, UI/UX Designer, and QA Engineer in ensuring project success. - Managed technical development that is in line with our established architecture, technical designs, and development standards. - Developed and maintained an auditing system on exchange users via TypeScript, GraphQL, Apollo Federation, AWS ECS Fargate for account managers to review. - Designed and developed Restful APIs for exchanges to comply with the travel rules via TypeScript, Middy, AWS API Gateway, SQS, Lambda, Dynamodb. - Designed and delivered a SaaS product that integrates multiple travel rule protocols, KYT(Know Your Transaction), and sanction screening services via Golang, Gin, GORM, PostgreSQL, React, TypeScript, Docker, AWS API Gateway, Lambda, RDS. - Developed and maintained IaC(Infrastructure as Code) by AWS CDK to quickly replicate infrastructure between multiple environments. - Developed and maintained CI/CD workflow by GitHub Actions and AWS Codebuild.

- Developed and maintained CoolWallet applications for Android using Java. - Developed and maintained cross-platform components for Android and iOS using React native, Redux Saga. - Planned and implemented code that integrated third-party exchange APIs(Changelly, Shapeshift). - Designed and implemented systems for WalletConnect and ERC20 tokens creation protocols.

- Developed and maintained internal applications for data storage using Java - Implemented an APP lock that prevents an operator from closing the APP and keeps the APP activated permanently. - Designed and developed an application to enhance the data search efficiency via barcode scanning using Java, Retrofit, Greendao.

- Developed and maintained internal ERP system using PL-SQL, Oracle Form, Oracle Report. - Designed and developed ERP supplemental applications for data visualization using Java. - SOP preparation for the ERP supplemental applications and educated users on using the ERP supplemental applications. - Provided troubleshooting to help users solve any problems with the ERP related applications.