I have over eight years of experience in software development, specializing in .NET Framework and AWS. I have been experienced in Web Development with ASP.NET, Desktop App with WPF, Database with SQL Server, Cloud Solutions with AWS. I focus on collecting the requests, implementing, fixing bugs before release packages, researching and applying new techniques, and supporting my team members as well. I also have hands-on experience on Java, Python, JavaScript and Azure.

Programming Languages: C#, JavaScript/TypeScript. 

Skills: 

• Web Development with C#, ASP.NET

• Database with SQL Server, PostgreSQL, DynamoDb

• Design, provision, implement AWS Cloud Architecture

• IAC with Terraform.

• Desktop app with WPF

• Microservices with Java Spring

• Automation scripts/Data transform with Python

Tools: Visual Studio, Rider, Visual Studio Code, IntelliJ Idea, Git, TFS, Jira, Azure Devops

Health Care Application – Singapore  

Backend Lead, January 2023 – Present

Project description 

• Team size: 15 (developers)  

• The applications gather HealthCare information from hospitals and polyclinics across the country and provide it to users.

Responsibilities 

• Build UI applications and backend API utilizing AWS Services.

• Design and propose cloud solutions with AWS.

• Develop Lambda functions.

• Design SQL Server and DynamoDB database.

• Develop batch jobs for scheduled tasks.

• Build and deploy applications as docker image with ECS

• Collect and build data pipeline with AWS Glue and Python.

Technologies 

• AWS (API Gateway, Lambda, S3, RDS, DynamoDB, ElastiCache, ECS, Batch, SNS, SQS, Glue).

• C#, .NET 8

• SQL Server

• Redis

• Python

• Docker

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Car Title Management/ Floorplan Management – US

Technical Analyst, Oct 2020 – December 2022

Project description 

• Team size: 8 (5 developers, 1 DevOps, 1 QA, 1 SM)  

• Car Title Management Service: The applications (including desktop apps, web APIs, and Windows services) help internal employees to scan, perform OCR, store, and process car titles.  

• Floorplan Management System: Mobile apps with micro-services API for car dealers to manage their floorplans.

Responsibilities 

• Develop and maintain desktop applications, web API for car titles processing.  

• Develop and maintain windows services for automatically performing OCR and saving car titles information.  

• Develop microservices as backend for floorplans services.  

• AWS Migration:

• Design high availability and scalable AWS cloud architecture.

• Rebuild functions to AWS Lambda.  

• Database migration to RDS

• Data migration.

• Create automation runbooks for scheduled tasks.

• Build AMI images.

• Build docker images.

• Deploy micro-services with ECS.

• Provision infrastructure with IAC.

• Create monitoring policies

Technologies 

• AWS (S3, Lambda, EC2, ALB, WAF, Autoscaling, RDS, ECS, SFTP, SnowBall, DataSync)

• Terraform

• C#, .NET 4.x, .NET 6, ASP.Net

• Java Spring

• Python

• SQL Server

• New Relic

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Data ETL – Japan

Team Lead, May 2019 – June 2020

Project description 

• Team size: 4 (developers)

• Create scripts/PostgreSQL functions to get raw data, transform and save as structured data.

• Aggregate data based on specified conditions and build functions for analytics

Responsibilities 

• Estimation, assign tasks, tracking progress

• Create bash scripts and PostgreSQL functions to load raw data from multiple sources (other databases, csv files, geographic, statistical data).

• Clean, transform, and store the data into database.

• Develop PostgreSQL functions for data aggregation, storing the aggregated data in the target database for analytics purposes.

• Build functions, optimize queries for API to search and retrieve data.

Technologies 

• PostgreSQL

• Bash Scripts

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Digital Contracts Remote Signing – US

Developer, Oct 2017 – July 2018

Project description 

• Team size: 4 (developers)

• Applications help stakeholders in real estate transactions to remotely sign digital documents and contracts via smartphones.

Responsibilities 

• Build Backend APIs for mobile applications

• Build Android App with Xamarin

Technologies 

• ASP.Net API  

• SQL Server

• Xamarin Android

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Car Trading Web Applications – Japan

Developer, Oct 2015 – July 2017

Project description 

• Team size: 8 (5 developers, 1 BA, 1 QA, 1 PM)

• Applications help stakeholders in real estate transactions to remotely sign digital documents and contracts via smartphones.

Responsibilities 

• Develop web applications for external users and stakeholders.

• Build and maintain web applications for internal administrators.

• Develop SQL Server Stored Procedures.

• Provide support to end users.

Technologies 

• ASP.Net MVC

• SQL Server

AWS Certified Solutions Architect Associate  

AWS Certified Developer Associate  

AWS Certified SysOps Administrator Associate  

AWS Certified Security Specialty  

AWS Certified Database Specialty  

Microsoft Certified: Azure Fundamentals

Awards: Won Second Prize in the National Informatics Olympiad

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