> Markdown version of [/jobs/ext/1400843-sr-java-developer-government-systems-modernization](https://www.wearedevelopers.com/jobs/ext/1400843-sr-java-developer-government-systems-modernization). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr. Java Developer (Government Systems Modernization) - **Company:** Zachary Piper - **Location:** Reston, VA, United States (Remote available) - **Experience:** Expert - **Salary:** $87,100.0 - $157,450.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Microsoft Windows, Artificial Intelligence, Apache HTTP Server, Apache Tomcat, Component-Based Software Engineering, Application Integration Architecture, Systems Engineering, Cluster Analysis, Code Review, Information Systems, Databases, System Configuration, Relational Databases, Java Platform Enterprise Edition (J2EE), Intelligence Analysis, Python (Programming Language), Oracle (Applications), SAP Business Suiteing, Secure Coding, Software Engineering, Apache Solr, Systems Integration, Management of Software Versions, VMware Infrastructure, Apache Zookeeper, Primefaces, Enterprise Software Applications, Fastapi, Information Technology, Deployment Automation, Devsecops, Service Stack - **Published:** July 23, 2026 - **Apply:** https://www.careerjet.com/job/useaff40438906f09fdab396525885355c/eaa ## About the Role Clearance Requirement: Ability to obtain and maintain a TS/SCI clearance (U.S. Citizenship required) Preferred Clearance: TS/SCI with current, in-scope Polygraph, * 13+ years of experience in software development, systems engineering, information technology, or a related field with comparable responsibilities. * Bachelor's degree may substitute for 4 years of experience. * Master's degree may substitute for 6 years of experience. Technical Qualifications * Expert-level experience in enterprise Java application development. * Strong Python development experience. * Experience developing and supporting applications on Windows-based VMware infrastructure. * Expertise with Apache Solr and Zookeeper, including: * Solr administration and clustering * Version upgrades * Solr index migration and optimization * Experience with Apache Tomcat administration and deployments. * Experience with Apache Directory Studio and directory service integrations. * Experience integrating applications with Oracle 19c and relational databases. * Experience supporting SAP Business Intelligence reporting frameworks. * Strong knowledge of secure coding practices and government compliance requirements. * Excellent troubleshooting, analytical, and problem-solving skills. * Strong written and verbal communication skills. Clearance Requirements * Ability to obtain and maintain a TS/SCI security clearance. * U.S. Citizenship required., * Active TS/SCI clearance with a current, in-scope Polygraph. * Experience with the PrimeFaces UI framework. * Experience supporting large-scale government modernization or migration initiatives. * Experience working within classified or highly regulated environments. * Familiarity with DevSecOps practices and automated deployment pipelines. ## Description We are seeking an experienced Senior Java Developer to support the modernization of a mission-critical government information system. The ideal candidate will have extensive experience developing and maintaining enterprise Java applications and a proven track record of upgrading complex software systems within secure, highly regulated environments. In this role, you will lead modernization efforts across a diverse technology stack, including Apache Solr with Zookeeper, Apache Tomcat, Apache Directory Studio, Oracle 19c, SAP Business Intelligence reporting frameworks, and Java/Python applications deployed on Windows-based VMware infrastructure. The successful candidate will possess strong expertise in secure software development, application modernization, system integration, and Solr index migration and optimization. You will collaborate with security, infrastructure, database, and business stakeholders to ensure successful upgrades with minimal operational disruption., Application Development & Modernization * Plan and execute technology stack upgrades for enterprise Java applications supporting government programs. * Develop, maintain, and enhance Java- and Python-based application components. * Modernize and refactor legacy application code to align with current development standards and best practices. * Implement secure coding practices in compliance with government security requirements. * Analyze existing systems and recommend improvements for performance, scalability, and maintainability. Infrastructure & Integration * Upgrade and maintain Apache Solr environments utilizing Zookeeper coordination services. * Perform Solr version upgrades, including index migration, optimization, and validation. * Configure, deploy, and manage applications within Apache Tomcat environments. * Integrate enterprise applications with Oracle 19c and other relational database systems. * Support directory services integrations using Apache Directory Studio. * Design, implement, and maintain SAP Business Intelligence reporting framework integrations. * Troubleshoot and resolve application, database, and infrastructure issues. Collaboration & Documentation * Partner with security, infrastructure, database, and business teams to ensure successful project delivery. * Coordinate upgrade activities while minimizing operational impact. * Develop and maintain technical documentation, system configurations, architecture diagrams, and deployment procedures. * Participate in code reviews and promote development best practices. * Support testing, validation, and deployment activities across multiple environments., Description Leidos is seeking a Lead AI Software Developer to join the Air Traffic Business Area within the Homeland Sector, supporting the development of the Leidos Common Autom… + 13 hours ago, Description Leidos is looking for a Software Developer focusing on System Management supporting our Federal Aviation Administration (FAA) Terminal Flight Data Manager (TFDM) prog… + 24 days ago + ## Related Videos - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Kubernetes and Microservices with Multi-Model Databases](https://www.wearedevelopers.com/videos/382-kubernetes-and-microservices-with-multi-model-databases) - [DevSecOps: Injecting Security into Mobile CI/CD Pipelines](https://www.wearedevelopers.com/videos/273-devsecops-injecting-security-into-mobile-ci-cd-pipelines) - [Intro to FastAPI](https://www.wearedevelopers.com/videos/462-intro-to-fastapi) - [Fault Tolerance and Consistency at Scale: Harnessing the Power of Distributed SQL Databases](https://www.wearedevelopers.com/videos/1146-fault-tolerance-and-consistency-at-scale-harnessing-the-power-of-distributed-sql-databases) - [DevSecOps: Security in DevOps](https://www.wearedevelopers.com/videos/36-devsecops-security-in-devops) ## Related Articles - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [93 Java Interview Questions You Should Prepare For](https://www.wearedevelopers.com/magazine/14-93-java-interview-questions-you-should-prepare-for) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Résumé-Driven Development: How IT trends affect the job market for software developers](https://www.wearedevelopers.com/magazine/59-resume-driven-development-how-it-trends-affect-the-job-market-for-software-developers)