Hybrid Java & Database Engineer

e&e IT Consulting Services, Inc.; Harrisburg (Dauphin County); Hybrid; USD 90,000 - 130,000; Full time

Job summary

e&e IT Consulting Services, Inc. seeks a Java and Database Developer for a hybrid contract role in Harrisburg, PA. You will develop Java applications, design and optimize SQL for relational databases, and support enterprise integrations and batch processes in a production environment.

Responsibilities include troubleshooting issues, maintaining legacy systems, and ensuring data integrity across interfaces. Strong SQL, Java, Spring Boot, and IBM MQ experience are required for this challenging

Qualifications

• Approximately 3–5 years of professional experience developing and supporting Java applications and relational databases.
• Strong hands-on experience with relational database development, including complex stored procedures, triggers, views, joins, scripts, query tuning, and data reconciliation.
• Experience developing and maintaining applications using Java and Spring Boot.
• Experience with Spring Batch, Spring Web, REST APIs, JDBC/JPA, and service-layer development.
• Working knowledge of SAP ASE/Sybase or a comparable relational database platform.
• Experience with Microsoft SQL Server/T-SQL, Oracle PL/SQL, or another procedural SQL environment is transferable.
• Experience supporting enterprise integrations using REST APIs, IBM MQ, or comparable messaging technologies.
• Understanding of distributed application concepts including dependencies, retries, timeouts, failover, idempotency, and recovery.
• Experience supporting scheduled processing, message-based workflows, secure file transfers, and application logging.
• Strong production troubleshooting skills with the ability to diagnose application, integration, and database issues.
• Working knowledge of Maven, unit testing, mocking frameworks, debugging, and code review practices.
• Ability to work independently, take ownership of technical issues, and deliver complete and thoroughly tested solutions.
• Strong communication skills with the ability to clearly explain technical findings, issues, and resolutions.
• Ability to successfully complete a required criminal background check.

Responsibilities

• Develop, debug, maintain, and optimize complex SQL, stored procedures, triggers, views, scripts, and database business logic.
• Develop and maintain Java applications using Java 21, Spring Boot 3.x, Spring Batch, Spring Web, JDBC/JPA, and REST APIs.
• Support batch processing, scheduled jobs, file transfers, FTP/SFTP integrations, and message-based workflows.
• Maintain and troubleshoot enterprise integrations involving IBM MQ, REST APIs, messaging platforms, notifications, and connected application systems.
• Investigate and resolve production incidents, application errors, failed integrations, data discrepancies, and database-related issues.
• Participate in a weekly on-call rotation to support production systems and business-critical services.
• Maintain legacy Java and database applications by tracing existing business logic, diagnosing defects, and implementing targeted fixes and enhancements.
• Perform controlled refactoring while protecting existing business behavior, data integrity, and integration contracts.
• Improve application and database performance, reliability, logging, availability, maintainability, and recovery capabilities.
• Perform data reconciliation and data-quality analysis to identify and resolve inconsistencies across systems.
• Tune database queries and application components to improve performance and stability.
• Test, debug, review, and validate Java and database changes prior to production release.
• Collaborate with analysts, testers, DBAs, developers, and operations teams to deliver reliable, thoroughly tested solutions.
• Document technical changes, troubleshooting findings, integration behavior, and operational procedures.

Skills

Java

Spring Boot

SQL

Database development

REST APIs

JDBC/JPA

IBM MQ

Maven

Git

Docker

Kubernetes

CI/CD

Tools

Maven

Git

Jenkins

Azure DevOps

GitHub Actions

Job description

e&e IT Consulting Services, Inc. seeks a Java and Database Developer for a hybrid contract role in Harrisburg, PA. You will develop Java applications, design and optimize SQL for relational databases, and support enterprise integrations and batch processes in a production environment.

Responsibilities include troubleshooting issues, maintaining legacy systems, and ensuring data integrity across interfaces. Strong SQL, Java, Spring Boot, and IBM MQ experience are required for this challenging