NGUYEN VAN THANG
Software Engineer passionate about exploring new technologies and building products for a global audience.
May
Fullstack Engineer with 4+ years in fintech, building e-wallet and digital banking systems with Node.js, Golang, and microservices, including core banking integrations (T24 Temenos, NAPAS) for clients across Vietnam, Thailand, and Australia.
J
JITS Innovation Labs
Jan 2025 - Present
Mid-level Full-stack Developer
Thailand, Myanmar
Sails.js
MongoDB
Next.js
Golang
NestJS
Microservice
- Built and maintained scalable backend and frontend services serving 50,000+ monthly users, delivering features 15% ahead of schedule.
- Led zero-downtime migration from MongoDB 6 to 8 for a production financial system.
- Migrated core transaction logic to Golang, achieving a 45% increase in concurrent transaction performance.
- Developed core banking features: interbank transfers, regulatory reports, reconciliation, and bill payments.
- Designed and optimized secure, high-availability backend services for financial transactions.
- Participated in frontend migration from AngularJS to Next.js, utilizing AI-assisted tools to improve development efficiency and application performance.
- Implemented unit testing with Mocha & Chai, achieving 80%+ code coverage to ensure system reliability and maintainability.
BNF Digital Banking
Jan 2026 - Present
Timosleste
Sails.js
MongoDB
Microservices
Kafka
Next.js
- Led a small team of developers (5 members), mentoring junior/fresher engineers to improve code quality, problem-solving skills, and development best practices.
- Integrated interbank transfer flows, handling transaction routing, status tracking, and reconciliation with T24 Core Banking System.
- Developed and integrated real-time transaction processing with T24 Temenos Core Banking System.
- Built event-driven transaction pipelines using Kafka to handle asynchronous processing of banking events (transfers, notifications, reconciliation) with guaranteed delivery and idempotency.
VSF VPAY E-wallet
Aug 2025 - Present
VinGroup - VietNam
Sails.js
MongoDB
Microservices
AWS
- Integrated cash-in/cash-out flows with Techcombank and NAPAS, handling bank transfer reconciliation and real-time balance synchronization.
- Developed bill payment features and integrated multiple third-party service providers (electricity, water, telecom) with idempotent transaction handling and failure recovery.
- Developed transaction history and statement features with advanced filtering, pagination, and date-range queries for high-volume e-wallet data.
- Optimized State Bank regulatory reporting and reconciliation systems using MongoDB Aggregation Pipeline, reducing report generation time for large-scale transaction datasets.
- Extended core e-wallet platform with Vietnam-specific features including local payment methods and compliance with State Bank of Vietnam regulations.
Thailand
NestJS
Kafka
PostgreSQL
Temporal
Grafana
- Built an AI context engine for an electronic transaction platform to provide contextual data processing and orchestration for AI services.
- Implemented Kafka-based CDC streaming between core banking systems and the AI contextual engine, while integrating with the e-wallet core platform.
- Managed workflow orchestration and distributed state handling using Temporal, and integrated AI caller SDKs for service communication.
- Monitored system metrics, observability, and performance dashboards using Grafana and Prometheus.
N
NCC ASIA
Nov 2022 - Dec 2024
Backend Developer
TRUDI
Mar 2024 - Dec 2024
Australia
ASP.NET 8
PostgreSQL
Kafka
Redis
Angular
Express.js
Spring Boot
- Architected CRM reporting service with Redis caching, reducing database load by 30%.
- Led migration from AWS S3 to Minio, cutting storage costs by 20%.
- Optimized PostgreSQL performance through query tuning, indexing strategies, and table partitioning, improving reporting query speed for large datasets.
- Designed Kafka-based data pipeline to synchronize and process system data across services, reducing data processing latency.
- Integrated third-party VoIP service into a Node.js backend to manage and track inbound/outbound calls between sales agents and customers within the CRM workflow.
H
Hanoi University of Mining and Geology
Sep 2021 - July 2025
Software Engineering
Scientific research
Feb 2023 - Aug 2023
Student research
Express.js
Node.js
MongoDB
React
- Developed a geological map website for Bac Kan province, showcasing geotourism sites using WebGL.
- Served as the Team Leader of the scientific research project.
- Collaborated and developed the project based on real geological data from Bac Kan province.
Skills
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