Senior Java Fullstack Engineer#26-39577

$74.74-$78.79 per hour

O Fallon, MO

Hybrid

Job Description

Our client, a Credit Card Company, is looking for a Senior Java Fullstack Engineer for their O Fallon, MO/Hybrid location.

Responsibilities:

This job independently executes key elements of projects/processes within the Software Engineering area by applying in-depth knowledge of their discipline and area best practices to effectively resolve problems and roadblocks as they occur.

Contributes to the development and maintenance of high-quality, scalable software solutions, supporting security and operational resilience with guidance.

Participates in code reviews, providing feedback to help uphold quality standards and best practices.

Assists in designing, developing, and delivering software solutions that align with business needs and organizational standards, with oversight.

Creates and maintains technical artifacts, such as requirements documents, design specifications, and test plans, supporting project documentation efforts.

Supports system maintenance activities, including incident management, root cause analysis, and problem resolution in production environments, with supervision.

Assists in evaluating emerging technologies and frameworks, supporting Proof of Concept (PoC) efforts and solution assessments.

Contributes to solution and technology roadmaps, providing input to support strategic planning and innovation initiatives.

May contribute to solution development for new products/services and/or manage smaller project/initiatives as an experienced individual contributor with specialized knowledge within the Software Engineering area.

Team is responsible for building and maintaining applications that support this administration platform. This is a true Full Stack role.

Develop enterprise applications using a Java technology stack with Angular or React as front-end technologies.

Participate in gathering and refining business requirements.

Ensure software designs align with Client's Enterprise Architecture and leverage enterprise services.

Ensure product development meets Client's business needs.

Apply Client standard development methodologies, follow technology standards, and ensure projects are appropriately documented.

Ensure software and system design support the goal of zero downtime in production.

Work closely with business partners on product definition, roadmaps, business case development, and overall team direction.

Respond to operational and business concerns related to future programs, projects, or enhancements to ensure consistent delivery of quality services.

Support appropriate certifications and compliance requirements, including PCI, GLBA, Safe Harbor, and others.

Drive performance engineering of the enterprise software architecture and provide guidance, advice, or training to other application developers.

Improve and expand the existing platform by ensuring it is resilient, secure, and scalable.

Use AI tools effectively as part of daily development work, including tools such as Claude Code, Copilot, or similar platforms.

Requirements:

Required Skills:

Java

Spring Boot

REST APIs

Hibernate

JPA

AWS

Oracle Database

Full Stack development (Angular preferred, React acceptable)

Communicate clearly

Desired Skills:

Production support experience

Troubleshooting skills

Log analysis (Splunk or similar tools)

Root cause analysis

Ability to diagnose production issues

Qualifications:

Bachelor's degree in information systems, Information Technology, Computer Science, Engineering, or equivalent work experience.

More than 7 years of industry experience.

Excellent communication skills, with the ability to interact across multiple organizational levels and with internal and external customer groups.

Strong analytical and problemsolving abilities, with the ability to quickly adapt to new technologies, methodologies, and systems.

High energy, strong attention to detail, and the ability to function independently under pressure with a high degree of initiative and selfmotivation.

Strong interpersonal and relationshipbuilding skills, with a solid track record of developing internal and external partnerships.

Proficiency with J2EE, Java 8 or higher, JSP, Servlets, Spring 5, Hibernate, and databases such as Oracle and SQL Server.

Experience with SQL and NoSQL databases such as MySQL, PostgreSQL, and MongoDB.

Experience with web services (SOAP/RESTful), servers (WebSphere, JBoss, Tomcat), HTML, JavaScript, jQuery, React or Angular, and IDEs such as Microsoft Visual Studio or Eclipse is a plus.

Experience with tools such as Maven, Gradle, Jenkins, Chef, and Sonar, as well as methodologies such as Waterfall and Agile.

Experience with LLM integration, prompt engineering, and agentic patterns.

Java Full Stack Engineering

Java 8+, J2EE, Spring, Hibernate

Angular/React frontend development

REST/SOAP

APIs and enterprise application development

CloudNative Architecture & DevOps

CloudNative / AWS or Other Cloud Platforms

CI/CD and engineering tools like Jenkins, Maven, Gradle, Chef, and Sonar

GenAI / AIEnabled Engineering

Ability to leverage GenAI tools to improve developer productivity

Apply AIassisted coding, testing, documentation, and troubleshooting

Explore practical GenAI use cases for modernization, automation, and platform efficiency.