Application Developer II

Application Developer IILocation US-MT-BillingsID 2026-4271Category Software & Systems Development Position Type Full-Time Remote No Clearance Required Public Trust (Tier 4) OverviewNow Hiring at AMERICAN SYSTEMSEpsilon, Inc. has joined AMERICAN SYSTEMS! As one organization, we offer expanded resources, streamlined operations, and increased opportunities for growth and development.Join us to be part of a dynamic, collaborative environment dedicated to innovation and customer success.ResponsibilitiesAn Average Day:As the Application Developer II iyou will be responsible for the development, enhancement, maintenance, and modernization of enterprise applications within a Java-based technology stack. You will support full lifecycle application delivery, including requirements analysis, secure design, development, testing, database optimization, and cloud migration efforts. You will also collaborate closely with customers, product owners, enterprise architects, and Agile team members to deliver secure, scalable, and high-performance solutions aligned with mission and business objectives.- Develop and maintain RESTful services and responsive user interfaces that integrate with enterprise systems and databases.- Manage and optimize databases in Oracle and PostgreSQL, including schema updates, indexing, query tuning, and performance analysis.- Troubleshoot and resolve application and database issues to ensure high availability and reliability of mission-critical systems.- Implement secure authentication and authorization mechanisms using OAuth2 protocols and ensuring compliance with federal cybersecurity standards.- Apply secure coding practices and remediate vulnerabilities identified through security assessments.- Collaborate with customers and stakeholders to gather requirements, support solution design, and translate business needs into technical solutions.- Participate in Agile development processes, including daily Scrum, sprint planning, reviews, and retrospectives.- Support enterprise modernization initiatives by partnering with Enterprise Architecture to migrate and refactor applications for AWS cloud environments.- Contribute to continuous improvement initiatives, including code reviews, documentation, DevOps integration, and performance optimization.Qualifications- As a requirement of this position, all candidates must be a U.S. Citizen. In accordance with 8 U.S.C. 1324b(a)(2)(C), we will not consider candidates for this position who do not meet the aforementioned conditions.- Must be able to pass federal background investigation and obtain a Public Trust- Bachelor's degree in Computer Science, Information Technology, or related field (or equivalent experience).- 3-7 years of experience in application development.- Demonstrated experience with Java development, SQL development, SpringBoot, Kendo UI or similar front-end framework, Oracle and PostgreSQL database environments, OAuth2 security implementation, Agile development methodologies- Experience supporting or participating in cloud migration initiatives to AWS.- Ability to participate in on-call support rotation and respond to operational incidents as required.- Must be able to present acceptable identification for customer badging and site access, such as a REAL ID compliant driver license, U.S. Passport, or other approved document from the GSA Required Identification List.EEO StatementEEO Race/Sex/Disability Status/Veteran Status