About
Hi there! I'm The Ngoc, a Backend Software Engineer with 3.5+ years of experience building scalable microservices and cloud infrastructure. I specialize in Node.js/NestJS, Python/FastAPI, PostgreSQL, and AWS/Kubernetes, with a strong foundation in system design, DevOps practices, and performance optimization.
Currently working at Zigvy on HRForte—an enterprise HR management platform serving 2,000+ users across Southeast Asia. I've led cloud infrastructure modernization, migrating 3 production microservices (400+ REST APIs) from EC2/ECS to AWS EKS, which reduced deployment time by 47%. I've also architected AI-powered systems and optimized critical API performance by 65% through query optimization, Redis caching, and indexing strategies.
What I do:
- Backend Development: Build and maintain production REST APIs using Node.js (NestJS) and Python (FastAPI), applying Domain-Driven Design (DDD) and CQRS patterns
- Cloud Infrastructure: Design and deploy scalable infrastructure on AWS using Kubernetes, Docker, Terraform, and GitOps practices
- Performance Optimization: Improve system performance through database optimization, caching strategies, and architectural improvements
- AI/ML Integration: Develop AI-powered features using FastAPI, OpenAI API, and vector databases like Qdrant
Technical Expertise:
- Languages: TypeScript, Python, JavaScript
- Backend: Node.js, NestJS, FastAPI
- Databases: PostgreSQL, Redis, Qdrant
- Cloud/Infra: AWS (EKS, ECS, Lambda, SQS), Kubernetes, Docker, Terraform
- DevOps: GitHub Actions, ArgoCD, GitOps, Prometheus, Grafana
- Architecture: REST APIs, Event-Driven Architecture, DDD, CQRS
I'm passionate about building reliable, scalable systems that solve real-world problems. I believe in clean code, continuous learning, and collaborating effectively with cross-functional teams.
Let's connect! I'm always excited to discuss backend architecture, cloud infrastructure, or explore collaboration opportunities.
Stack
Experience
Zigvy
Active- Cloud Migration Leadership: Led cloud modernization migrating 3 production microservices (400+ REST APIs) from EC2/ECS to AWS EKS, serving 2,000+ users and reducing deployment time by 47%.
- API Development: Developed and maintained 60+ production REST APIs using Node.js (NestJS) and PostgreSQL (30GB dataset), applying Domain-Driven Design (DDD) and CQRS patterns.
- Cost Optimization: Reduced AWS infrastructure costs by $200/month through Spot Instances, Karpenter autoscaling, and Kubernetes resource right-sizing while maintaining production reliability.
- AI-Powered Systems: Designed and deployed AI-powered HR chatbot using FastAPI, OpenAI API, and Qdrant, achieving 98% answer accuracy and ~5s latency.
- Performance Optimization: Optimized critical API performance by 65% through query optimization (EXPLAIN ANALYZE), Redis caching, indexing, and table partitioning.
- CI/CD & GitOps: Built GitOps-based CI/CD pipelines using GitHub Actions and ArgoCD, improving release reliability and auditability. Containerized legacy .NET Core monolith and FastAPI/NestJS microservices using Docker.
- Observability: Implemented monitoring using Prometheus and Grafana (15 dashboards, 36 alerts) for production systems visibility.
- Security & Compliance: Established ISO 27001-aligned security controls including Calico network policies, VPC segmentation, IAM least-privilege access, AWS Flow Logs, and continuous compliance monitoring via Scrut integration.
- International Collaboration: Worked effectively with cross-functional teams across Singapore, USA, and Vietnam, utilizing professional English communication skills to deliver complex projects on time.
- Agile Practices: Actively participated in sprint planning, code reviews, and retrospectives, fostering a culture of continuous improvement and knowledge sharing.
- English Communication
- Node.js
- NestJS
- TypeScript
- Python
- FastAPI
- Kubernetes
- Docker
- AWS (EKS, ECS, Lambda, SQS, EC2, RDS)
- Terraform
- PostgreSQL
- Redis
- Qdrant
- REST APIs
- CI/CD (GitHub Actions, ArgoCD)
- GitOps
- Prometheus
- Grafana
- OpenAI API
- DDD
- CQRS
- ISO 27001
- Agile
Education
Projects
A multi-country Human Resources and Payroll SaaS platform for Southeast Asia, enabling HR consultancies to manage payroll, compliance, and workforce operations across Vietnam, Philippines, Indonesia, Cambodia, and Thailand in a unified platform. Serves 2,000+ users with 400+ REST APIs.
Key Technical Initiatives:
Cloud Infrastructure & Migration:
- Led migration of 3 production microservices from EC2/ECS to AWS EKS, reducing deployment time by 47%
- Containerized legacy .NET Core monolith and FastAPI/NestJS microservices using Docker
- Implemented GitOps-based CI/CD with GitHub Actions and ArgoCD for release reliability
- Reduced AWS infrastructure costs by $200/month through Spot Instances, Karpenter autoscaling, and resource right-sizing
Backend Development:
- Developed and maintained 60+ production REST APIs using Node.js (NestJS) and PostgreSQL (30GB dataset)
- Applied Domain-Driven Design (DDD) and CQRS patterns for scalable architecture
- Optimized critical API performance by 65% through query optimization (EXPLAIN ANALYZE), Redis caching, indexing, and table partitioning
Observability & Security:
- Implemented monitoring with Prometheus and Grafana (15 dashboards, 36 alerts)
- Established ISO 27001-aligned security controls: Calico network policies, VPC segmentation, IAM least-privilege access, AWS Flow Logs
AI-Powered HR Chatbot (Integrated Feature):
- Built conversational interface using FastAPI, OpenAI API, and Qdrant vector database
- Achieved 98% answer accuracy with ~5s latency per query
- Transformed HR support by providing instant, accurate responses to employee queries
Impact: Successfully modernized infrastructure, improved performance, and delivered AI-powered features that enhanced user experience for 2,000+ users across multiple countries.
- Node.js
- NestJS
- TypeScript
- PostgreSQL
- Redis
- Kubernetes
- Docker
- AWS (EKS, ECS, RDS)
- Terraform
- GitHub Actions
- ArgoCD
- GitOps
- DDD
- CQRS
- English Communication
- System Design
Get in Touch
Let's work together
Thanks for stopping by! I'm always open to new opportunities, creative collaborations, or a good conversation. I'd love to hear from you.