Senior Java Developer (Microservices) – Backup WebLogic Administrator

Overview International Logic Systems (ILS) is seeking a

Senior Java Developer

with strong experience in building

microservices / webservices

for enterprise and mission-critical applications. This role is primarily development-focused, with the added expectation that the individual can

support WebLogic administration activities as needed

in the absence of the primary WebLogic Administrator.

The ideal candidate brings deep Java expertise, practical middleware knowledge, and a willingness to operate across development and operational boundaries in a regulated Federal environment. The position supports applications currently deployed on

Oracle WebLogic Server , with a planned transition to

IBM WebSphere Liberty .

This is a hybrid role requiring on-site presence two days per week at our Fairfax, VA headquarters.

Responsibilities Application Development (Primary Focus)

Design, develop, and enhance

Java-based microservices and RESTful web services

using modern Java technologies and design patterns.

Implement secure service integrations using

OAuth 2.0

and related authentication/authorization mechanisms.

Develop and optimize data access layers using

Informatica MDM,

Oracle Database,

and

PL/SQL .

Analyze functional and technical requirements and translate them into high-quality, maintainable software solutions.

Apply appropriate architectural and design patterns to ensure scalability, performance, and maintainability.

Perform unit testing, integration testing, debugging, and performance tuning.

Prepare and maintain technical documentation, including design specifications and operational notes.

Collaborate with architects, business analysts, QA, and DevOps teams throughout the SDLC.

Provide technical leadership and guidance to junior developers as needed.

Participate in projects using

the Waterfall methodology

while supporting the organization’s transition toward

Agile practices .

Middleware & WebLogic Support (Secondary / Backup Role)

Provide

backup administration support

for WebLogic Server in the absence of the primary WebLogic Administrator.

Assist with WebLogic installation, configuration, patching, and environment updates.

Troubleshoot and resolve WebLogic-related production and non-production issues.

Support deployment, configuration validation, and runtime monitoring of Java applications.

Work with infrastructure and security teams to support application stability and compliance.

Assist with planning and execution of the future transition from

WebLogic to IBM WebSphere Liberty .

Qualifications Required Qualifications

10+ years of professional experience

in Java application development.

At least 3 years of hands-on WebLogic administration experience , including installation, configuration, and troubleshooting.

Strong experience with:

Java / J2EE

Microservices and REST API development

Oracle Database and PL/SQL

OAuth 2.0 and secure service design

Practical knowledge of middleware platforms such as

Oracle WebLogic

(required) and

IBM WebSphere / Liberty

(preferred or willingness to learn).

Experience working in large-scale, enterprise, or Federal application environments.

Ability to work independently with minimal supervision while collaborating effectively with cross-functional teams.

Strong analytical, troubleshooting, and documentation skills.

Preferred / Nice-to-Have Qualifications

Experience with

IBM WebSphere Liberty

or other lightweight Java application servers.

Familiarity with CI/CD pipelines and DevOps practices.

Experience with Agile or hybrid Agile/Waterfall delivery models.

Prior experience supporting mission-critical or regulated systems (Federal, financial, healthcare, etc.).

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