Senior Java Developer

Location:

100% Onsite - 651 Boas Street, Harrisburg, PA 17121 Schedule:

5 days onsite per week Clearance/Work Authorization:

Must be authorized to work in the U.S. Duration:

08/25/2025 - 06/30/2026

Job Description: We are seeking an experienced

Sr. Java Developer

to join our team onsite in

Central Pennsylvania (Harrisburg area) . This role is essential to the design, development, testing, and deployment of secure, scalable enterprise web applications and services. The ideal candidate will possess deep technical expertise in

Java/J2EE development , strong SOA and web services experience, and the ability to lead and collaborate across the full software development lifecycle.

Key Responsibilities:

Design, develop, and deploy complex enterprise applications using Java/J2EE. Build secure SOA web services leveraging

OWSM ,

UDDI , and

Oracle Identity Manager (LDAP) . Develop SOAP and RESTful APIs using

Spring Web Services

and

JAX-RS . Participate in all phases of project life cycle, including architecture, development, testing, and deployment. Implement BPEL orchestration and human tasks. Develop front-end components using

VueJS

and

NodeJS . Utilize

WebSphere Application Server ,

WebLogic , and

Tomcat

for server-side deployments. Program with

XML ,

JAXB ,

SAX ,

DOM , and use tools like

XSLT ,

XPath , and

XQuery . Use IDEs such as

Eclipse ,

JDeveloper , or

Spring Tool Suite . Implement threading, garbage collection tuning, and performance optimization. Apply

JDBC ,

OpenJPA ,

Hibernate , and other ORM tools for backend data access. Write complex SQL and PL/SQL stored procedures on

Oracle

databases. Follow best practices in

SOA , including reusable service design, loose coupling, and high availability. Contribute to and review architectural decisions, coding standards, and design documents. Use tools such as

GIT ,

Ant , and scripting (Shell/Perl) for builds and automation. Ensure security using

Web Service Security

and

Java Security frameworks . Work closely with other developers, architects, and stakeholders to deliver secure, scalable solutions.

Required Skills:

8+ years of hands-on Java/J2EE development experience. Experience developing enterprise web applications in a

SOA architecture . Proven background in

SOAP and RESTful services ,

Spring Framework , and

Java design patterns . Strong front-end development skills with

VueJS

and

NodeJS . Deep understanding of

distributed systems ,

threading , and

performance tuning . Strong SQL and database development experience with

Oracle . Solid debugging and troubleshooting capabilities. Experience with

Agile development methodologies .

Preferred Qualifications:

Experience with

WebLogic ,

WebSphere , or other JEE application servers. Familiarity with

Unix/Linux

and

Windows

environments. Scripting experience with

Shell

or

Perl . Experience with

Enterprise Integration Patterns ,

OOP ,

AOP , and

Java Design Patterns . Familiarity with

SVN ,

ClearCase , or

Microsoft Visual SourceSafe . Prior experience in

B2B integration environments . Familiarity with

configuration management ,

automated builds , and

CI/CD pipelines .

Work Location Requirement:

This position is

100% onsite . All candidates must live within

approximately 1 hour

of

The Labor and Industry Building in Harrisburg, PA .