$ whoami

Le Thanh Duy An

Software Developer

Software developer building reliable backend systems, multi-tenant platforms, and cloud-native services.

$ about --current

I work across TypeScript and Java ecosystems, with recent experience building multi-tenant healthcare platforms using NestJS, GraphQL, PostgreSQL, Redis, and AWS. Previously, I developed secure payment integrations and banking services with Java and Spring Boot. I am also pursuing a Master's degree in Information Technology at UIT.

$ skills --list

TypeScript
NestJS
Java
Spring Boot
GraphQL
PostgreSQL
Redis
AWS
Docker
Kubernetes
RabbitMQ
CI/CD

$ cat education.json

Education

Formal study and the academic milestones behind my engineering practice.

Master of Information Technology

University of Information Technology (UIT)

2025 – 2027 (expected)

GPA: In progress

Currently pursuing a master's degree in Information Technology
Exploring spatial and time-series data systems

PostGIS
TimescaleDB

Bachelor of Information Technology

Ho Chi Minh City University of Foreign Languages and Information Technology (HUFLIT)

2021 – 2025

GPA: 3.82/4.0

View academic transcript

Graduated with distinction
Ranked first in the IT Faculty and received a 60% academic scholarship for 2023–2024 and 2024–2025
Ranked second in the IT Faculty and received a 30% academic scholarship for 2022–2023
Received the Lotte Shin Kyuk-Ho Global Scholarship in April 2024
Former Executive Committee member of the HUFLIT IT Faculty Youth Union

Java
C#
.NET
Node.js
NestJS
Angular
Flutter
MySQL
Oracle
MongoDB
Git
Selenium

$ git log --work

Experience

Backend-focused product work across healthcare, banking, and technology education.

Software Developer

H3Tech

Full-time

Sep 2025 – Present·1 yr·Ho Chi Minh City · Remote

Contribute to a multi-tenant backend for a U.S. healthcare client, with a focus on scalability and tenant isolation.
Design tenant-aware schemas and data access patterns using NestJS, GraphQL, TypeORM, and PostgreSQL.
Built a bulk-upload pipeline that processes more than 50,000 records with relational writes in under three seconds.
Cache tenant connection details with Redis to keep isolated database access fast and reliable.
Maintain more than 80% test coverage with Jest unit and integration tests.
Integrate GraphQL APIs with a React frontend in a four-person product team.

TypeScript
NestJS
GraphQL
React
PostgreSQL
Redis
AWS

Backend Developer

Asia Commercial Bank (ACB)

Full-time

Sep 2024 – Oct 2025·1 yr 2 mos·Ho Chi Minh City · On-site

Built secure payment APIs connecting core banking systems with partners including EnViet, PTI, EVNHCM, SSMedia, and VCB.
Implemented SOAP/XML invoice mapping, FTPS image uploads, and RabbitMQ-based asynchronous processing.
Maintained Oracle-backed services for high-volume transaction workflows.
Migrated APIs from Kong Gateway to IBM API Connect and deployed services with Docker, Kubernetes, and Argo CD.
Secured external banking integrations with RSA signing, encryption, and OpenSSL-managed key pairs.
Maintained at least 90% test coverage using JUnit and Mockito.

Java
Spring Boot
Oracle
RabbitMQ
Docker
Kubernetes
Argo CD
IBM API Connect
Kong Gateway
Redis

Collaborative Lecturer

TEKY Academy

Contract

May 2022 – Dec 2022·8 mos·Ho Chi Minh City · On-site

Taught programming, robotics, 3D modeling, and game creation to young learners.
Adapted lessons to individual needs through active listening and structured questioning.
Created an inclusive, hands-on environment for creative problem-solving and computational thinking.