Senior Full Stack Java Developer

Overview Senior Full Stack Java Developer role at Charles River Laboratories. Join an industry-leading company focused on improving lives through innovative drug development and digitalized processes. This position is full-time and permanent, based at Ballina, IRL or Dublin, IRL, and will lead modernization, troubleshooting, and maintenance of the Java J2EE LIMS application with emphasis on converting legacy EJB components to RESTful services.
Job Summary Are you an expert in Java J2EE applications with proven skills in large-scale modernization of corporate systems? Would you like to apply your expertise to ensure full system stability within a cGMP regulated environment?
What you’ll be doing includes leading modernization efforts, collaborating with cross-functional teams, and ensuring compliance with industry standards while modernizing core systems.
Responsibilities Lead the modernization of an existing 1M+ lines Java J2EE application, transitioning from EJBs to RESTful APIs.
Drive the UI migration from Swing to modern JS/TS web framework using WebSwing, ensuring a seamless user experience.
Develop and maintain microservices architecture, optimizing performance and scalability.
Work with Spring, WildFly, and PostgreSQL to enhance backend functionality.
Implement best practices for software development, ensuring compliance with FDA guidelines, cGMP 21 CFR Part 11, MHRA, and GAMP5.
Ensure software documentation, change control procedures, and regulatory requirements are met.
Collaborate with Quality Assurance (QA) and regulatory teams to maintain compliance and data integrity.
Work closely with business analysts, operations, and external vendors to align software development with business needs.
Lead training and knowledge transfer sessions to ensure effective adoption of new technologies.
Participate in Agile development processes and contribute to CI/CD pipelines.
Perform all other related duties as assigned.
Qualifications Skills and Experience:
Bachelor’s degree in Computer Science, Software Engineering, or a related field.
5+ years of hands-on experience in Java J2EE development, with expertise in:
EJB-to-REST conversion
Spring framework
WildFly or similar Java EE application servers
Swing UI modernization to JS/TS web framework (preferably migrating to Svelte)
Strong experience with SQL databases (PostgreSQL preferred) and RESTful API development.
Technical Skills:
Expertise in object-oriented programming (OOP) and design patterns.
Proficiency in JavaScript, ReactJS, Svelte, or other modern frontend frameworks.
Knowledge of unit testing, integration testing, and automated end-to-end testing.
Familiarity with Agile methodologies and Application Lifecycle Management (ALM) tools.
Desirable:
Development in a GxP-regulated environment.
Experience working with LIMS (Laboratory Information Management Systems).
Understanding of cloud-based solutions and DevOps practices.
Physical Demands & Work Environment Must regularly operate a computer and communicate with employees, vendors, and external consultants.
Occasionally move about inside the office to access file cabinets and office equipment.
General office environment with occasional protective equipment when in laboratory areas; may require domestic travel.
About Charles River: Charles River is an early-stage contract research organization (CRO) providing a broad portfolio of discovery and safety assessment services to support clients from target identification through preclinical development. We are committed to diversity and inclusion.

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