Available for freelance & contract
Nguyen Van Thanh
Senior Backend & Cloud Engineer
10+ years designing and building large-scale distributed systems for banking, fintech, and enterprise platforms. Specialized in Spring Boot microservices, AWS, high-volume payment & remittance systems, and event-driven architectures.
Core Expertise
Backend
JavaSpring BootSpring WebFluxREST APIsSOAP APIsMicroservicesEvent-driven systemsTransaction processing
Cloud & DevOps
AWS (EC2, S3, RDS, Lambda, API Gateway)DockerKubernetesCI/CDProduction monitoring & observability
Databases
PostgreSQLOracleMySQLDB2
System Design
Distributed systemsScalable backend designIntegration architectureWorkflow/BPM systems
Experience
2022 – Present
Singapore
Singtel / NCS
Senior Software Engineer (Data & Platform)
- —Designed and built high-throughput backend services for cross-border remittance systems
- —Developed event-driven microservices for real-time transaction processing
- —Optimized PostgreSQL performance for large-scale financial datasets
- —Built observability systems for production monitoring and issue detection
- —Delivered secure, compliant systems with audit logging and encryption
2021 – 2022
Vietnam
MoneyTap
Senior Software Engineer
- —Built backend services for credit lifecycle management (loan, repayment, interest)
- —Integrated banking and payment gateway APIs with strong consistency guarantees
- —Developed API mocking framework using WireMock for parallel development
2019 – 2020
Thailand
Onelink
Senior Software Engineer (IoT & Data Systems)
- —Built real-time telemetry ingestion system for vehicle tracking data
- —Designed streaming pipelines for GPS and sensor data processing
2017 – 2019
Vietnam
Techcom Security
Senior Software Engineer (BPM Systems)
- —Developed workflow-based backend systems for financial operations automation
- —Built REST APIs supporting business process analytics and reporting
2014 – 2017
Vietnam
MB Bank
Senior Software Engineer (BPM & Loan Systems)
- —Designed end-to-end loan processing workflows (approval, appraisal, asset management)
- —Built high-volume transactional backend systems for banking operations