![]() ![]() I joined the team as a fresh graduate and improved rapidly. I actively participated in technical design discussions and development. We aimed to deliver cloud-native containerized microservices to achieve high availability, scalability and reliability. The backend team changed the direction to provide multi-tenancy backend services to support different channel apps.Īs the demand raised, the team decided to perform technology refresh to a microservices solution with. SingHealth and NUHS planned to extend the features on their own mobile application (Health Buddy and OneNUHS), and these features had already existed in HealthHub. I also develop tools to generate usage statistics from millions of audit logs. ![]() Besides the backend services to serve the end-user, I have to build an intranet admin portal for the operation team to perform production support. ![]() NET Framework, ASP.NET and Microsoft SQL Server. The backend services are mainly developed with Microsoft technology, including. When I just started working in IHiS, I joined the backend team of HealthHub. I am proud to contribute to this project and overcome the challenge.ĪWS services used: Lambda, SQS, API Gateway, DynamoDB, CloudWatch. This system has benefited the entire Singapore population to overcome the pandemic. To simplify the repetitive deployment, we used Terraform to manage AWS infrastructure as code and set up approval-control CI/CD with Azure Pipelines. We had a weekly release to enhance the system as the requirements often changed. Within two weeks, we successfully deployed a resilient system to production. Beyond the paper discussion, we also performed load tests and found all the possible bottlenecks. During the development stage, I participated in many solution architecture discussions. I picked up the knowledge quickly with guidance from two experienced teammates. However, I decided to take the challenge and recommended myself as AWS developer. Most of the team did not have experience with AWS services, including me. However, a highly available, scalable and reliable system is required for the COVID-19 vaccination programme.Īfter rounds of brainstorming, the management decided to implement the systems with AWS Serverless services, mainly Amazon SQS and AWS Lambda. Around end of 2020, Singapore government secured the COVID-19 vaccine stocks. ![]()
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