REST APIs & Service Design
Maintainable Spring Boot services with explicit contracts and practical boundaries.
Highlights
What I build and improve
Database & Query Optimization
Data models, indexes, and measured query improvements for operational workloads.
Event-Driven Processing
Kafka consumers and synchronization workers for reliable asynchronous workflows.
Service Integration
gRPC and REST adapters that normalize data from multiple internal services.
Search & Document Workflows
Elasticsearch-backed operational search and template-driven document generation.
Tech Stack
Tools I ship with
CORE STACK
- Java (Spring Boot)
- Kafka
- EMQX / MQTT
- Redis
- Oracle DB
- PostgreSQL
- MongoDB
- Elasticsearch
INFRASTRUCTURE
- Kubernetes
- Rancher
- GitLab CI
- MinIO / S3
Featured Projects
Products and production systems
An NDA-safe view of logistics systems I have contributed to, focused on responsibilities, architecture, and engineering decisions.
Connected platform
Fleet Operations Platform
Three connected backend services separate operational workflows, administration and dispatch, and read-oriented data intelligence.
Names, boundaries, and relationships are generalized and anonymized for confidentiality.
C1 architecture summary
Elements
- Fleet Operations Staff (person)
- Administrator / Dispatcher (person)
- Fleet Operations Platform (software system)
- Approved Operational Data Sources (external system)
Relationships
- Fleet Operations Staff use the Fleet Operations Platform for workflow, lookup, and reporting.
- Administrators and dispatchers use the Fleet Operations Platform for planning, resources, and coordination.
- The Fleet Operations Platform exchanges approved REST or gRPC requests, responses, and events with Approved Operational Data Sources.
Service 01 / Operational CoreNDA-safe
Fleet Operations Core
The central backend service for fleet workflows, interactive lookup, operational statistics, and document generation.
Java 17Spring BootRESTKafkaRedisPostgreSQLgRPC
- Operational workflows
- Service integration
- Document output
Service 02 / AdministrationNDA-safe
Fleet Administration & Dispatch
A backend service for planning, resources, devices, configuration, and coordination across fleet operations.
Java 17Spring BootRESTKafkaRedisPostgreSQLgRPC
- Planning context
- Resource coordination
- Event synchronization
Service 03 / Data IntelligenceNDA-safe
Fleet Data Intelligence Hub
A data-focused backend service for multi-source synchronization, aggregation, operational search, and normalized lookup.
Java 17Spring BootKafkaElasticsearchPostgreSQLgRPC
- Data synchronization
- Aggregated lookup
- Search-oriented reads
Academic Projects
Academic Blog at FPTU
A team-built academic blogging platform with documented APIs and a structured relational data model.
- Led the team and coordinated project documentation.
- Designed the database and implemented backend APIs.
ASP.NET REST APISQL Server
FPT Software Academy Training Management System
A training management application developed during the FPT Software internship program.
- Designed database structures and implemented CRUD features.
- Tested functionality and fixed application defects.
Spring BootMySQL
Contract Management System
A web application for managing contract information and supporting operational workflows.
- Contributed to database and REST API design.
- Built full-stack features and supported deployment.
ASP.NET REST APIReactSQL Server
Experience
Where I have contributed
Aug 2024 to Present
GTEL OTS
Middle Backend Developer
- Develop and maintain Java 17+ and Spring Boot microservices for vehicle lookup, journey data, operational statistics, and record exports.
- Design Oracle, PostgreSQL, and MongoDB data models; optimize SQL queries, indexing, partitioning, transactions, and persistence with Spring Data JPA/Hibernate.
- Build resilient Kafka consumers and asynchronous synchronization workers with retry, idempotency, and dead-letter handling.
- Use Redis for caching, distributed locking, rate limiting, and temporary state coordination.
- Integrate microservices through gRPC and REST APIs; implement JWT/OAuth2 authentication, RBAC authorization, and API security practices.
- Optimize backend latency, throughput, and scalability for high-concurrency operational workloads.
- Build, deploy, and troubleshoot services with Maven/Gradle, Docker, Kubernetes, and CI/CD pipelines.
- Write unit and integration tests; monitor services through Prometheus, Grafana, ELK, and log analysis.
- Participate in code reviews, technical design discussions, cross-functional collaboration, and mentoring junior developers.
Internship
FPT Software
Internship
- Contributed to a Spring Boot training-management project and strengthened backend fundamentals.
2019 to 2023
FPT University, Ho Chi Minh City
Software Engineering
Good classification
English
Intermediate - able to communicate and read technical documentation
Contact
Let's connect
Ho Chi Minh CityOnsiteHybridRemote