Many banking, accounting, insurance, and enterprise ERP cores run on Java, Spring Framework / Spring Boot, and Hibernate / JPA backed by Oracle, SQL Server, or PostgreSQL. Whether you need to maintain and optimize an existing Java accounting system, fix Hibernate N+1 query bottlenecks, or expose clean REST/GraphQL APIs to a modern React frontend, you need an experienced enterprise polyglot engineer.

If you want to hire a freelance Java, Spring Boot, and Hibernate enterprise backend programmer, I am Aldian Fazrihady.

Enterprise Java, Spring & SQL Engineering

1. Transactional Accounting & ERP Core Development

I have built full double-entry accounting applications with Spring, Hibernate, Oracle, and JUnit/Mockito (Spring Hibernate Accounting App) with strict ACID transaction boundaries and comprehensive unit test coverage.

2. Advanced Cross-RDBMS SQL Optimization (Oracle, SQL Server, MySQL, PostgreSQL)

I tune complex enterprise SQL queries, execution plans, and ORM mappings across Oracle, Microsoft SQL Server, MySQL, and PostgreSQL (Enterprise SQL & RDBMS Reference).

Hire a Freelance Java & Enterprise Backend Programmer

About the Author — Hire Freelance Programmer Aldian Fazrihady

Aldian Fazrihady is a Top-Rated Senior Freelance Programmer, Freelance Full Stack Developer, and AI Application Engineer with 15+ years of production software engineering experience and Google Cloud Professional Cloud Architect & Data Engineer certifications. He specializes in building custom LLM & autonomous AI agents, RAG pipelines, Next.js/React PWAs, Python (Django/FastAPI), Go microservices, and serverless cloud infrastructure on Google Cloud Run and AWS.

Hire Aldian Fazrihady on Upwork | Book 1-Day Programming Service ($100 USD via Polar) | View Live AI Portfolio | Portfolio Directory | Send a Direct Message

Related Engineering Articles

Freelance Programmer Specializations & Category Hubs