Looking for a job

Trung Tính Nguyễn

@tinhnt

Message

I build reliable Java backend systems for finance, healthcare, e-commerce, and ticketing.

Vietnam

Message

What I'm looking for

I'm looking to build reliable backend systems, own services from design through production, and work asynchronously with collaborative teams that value clear documentation, code review, automation, and continuous improvement.

I'm currently building Spring Boot microservices for a Norwegian ERP accounting platform at Genie IT Solution, owning invoicing, expense tracking, and ledger reporting services from API contracts through production support.

I design REST APIs, JPA/Hibernate data models, and PostgreSQL queries that keep reporting responsive as data grows. I've automated invoice aggregation and expense matching, while protecting money-touching endpoints with idempotency, validation, and audit logging.

Previously at Cozwork JSC, I led a team of 2+ developers delivering high-traffic healthcare, e-commerce, and airline-ticketing products. I built microservices, integrated airline APIs and payment gateways, and delivered integrations with Shopify, Zapier, Klaviyo, and HubSpot.

I also build LedgerBase and Viesol, my own SaaS products, handling backend development, integrations, infrastructure, and automated self-hosted deployments end to end.

Experience

Work history, roles, and key accomplishments

Current

Java Backend Engineer

Current

Genie IT Solution

May 2024 - Present (2 years 4 months)

Develop and maintain Spring Boot microservices for an ERP accounting platform, owning services for invoicing, expense tracking and ledger reporting from API contract through production support. Design REST APIs and JPA/Hibernate data models against a PostgreSQL schema, using indexing and query profiling to keep reporting endpoints responsive as data volume grows.