Looking for a job

Hai Tran

@haitran

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Java Backend Engineer at NAB Vietnam building payment services and modernizing Kafka-based banking platforms.

Vietnam

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What I'm looking for

I'm prepared to take on broader backend engineering ownership across system design, cross-team delivery, and production reliability.

At NAB Vietnam, I build backend services for banking and payments. On the Digital Payments Hub, I designed REST APIs for payment approvals and implemented decline and cancellation actions for NAB Internet Banking.

On NAB’s Transaction Lifecycle Manager, I built and enhanced Kafka-based payment microservices and strengthened transaction reliability through improvements to reversal handling, duplicate prevention, recovery, and routing. I also modernized services from Java 11 to Java 17 and Spring Boot 2 to Spring Boot 3.

Previously, I engineered backend features for Mit.dk, a secure digital mailbox platform, and built Java enterprise applications at Axon Active. My work has also included automated testing, production support, and performance testing across banking, trade finance, and digital communication systems.

Experience

Work history, roles, and key accomplishments

Current

Java Software Engineer

Current

NAB Vietnam

Dec 2022 - Present (3 years 10 months)

Design and deliver REST APIs for payment-approval lists and implement decline/cancel decision actions. Drove black-box testing infrastructure and CI pipelines, sustaining 80%+ code coverage.

Java 8 Spring MVC JDBC Oracle OpenAPI Swagger JWT JUnit5 Mockito SonarQube Docker Harness Jenkins AWS OpenSearch

Java Software Engineer

Netcompany Vietnam

Jun 2021 - Oct 2022 (1 year 4 months)

Engineered backend features for a national-scale digital mailbox platform, delivering login, payment, and communication capabilities. Improved reliability with monitoring and Kubernetes-based scaling.

Java 11 Spring Boot Kafka PostgreSQL Redis Kubernetes Elasticsearch Liquibase Kibana Groovy Gatling Grafana

Java Software Developer

Axon Active

Aug 2018 - Nov 2020 (2 years 3 months)

Built Java-based enterprise web applications for BPM, project management, purchasing, and cost calculation. Applied TDD practices and delivered customer management modules.