Senior Software Engineer * Backend; Java

Senior Software Engineer - Backend (Java)

Remote with Preference for Greenbelt, MD. Occasional travel required for NASA site access and badging.

Ad Hoc is seeking a Senior Software Engineer - Backend (Java) to support the development and modernization of enterprise‑scale web applications and backend systems in a federal environment.

This role is ideal for engineers with strong experience building Java-based applications, supporting distributed systems, and collaborating within agile software development teams. You will contribute to mission‑critical systems supporting government operations and modernization initiatives.

We have a strong preference for candidates located near Greenbelt, Maryland, or candidates willing to travel onsite periodically for badging and program‑related activities.

This role will require the ability to obtain and maintain a government clearance.

• Design, develop, and maintain enterprise‑level Java web applications and backend services
• Build and support RESTful APIs and distributed system integrations
• Develop scalable solutions using Spring Framework and related Java technologies
• Write, optimize, and troubleshoot SQL queries against Oracle databases
• Collaborate with engineers, product teams, QA, Dev Ops, and client stakeholders in agile environments
• Troubleshoot production issues and support ongoing system enhancements
• Participate in code reviews, technical planning, and architecture discussions
• Contribute to software engineering best practices and development standards
• Support application deployment, maintenance, and continuous improvement initiatives

• 8+ years of relevant software engineering experience and a Bachelor’s degree, or equivalent additional experience in lieu of a degree
• 5+ years of hands‑on experience developing Java web‑based applications
• Strong experience with Java, JSP, Spring Web Framework, and REST Web Services
• 3+ years of experience working with Oracle databases and writing SQL queries
• 2+ years of experience developing web applications using JavaScript libraries and frameworks
• Experience with JavaScript, especially jQuery, CSS, HTML, JSON, and XML
• Experience with JBoss, Hibernate or MyBATIS, Maven, rich AJAX web applications, Eclipse, Git, and software development process models
• Strong troubleshooting and debugging skills in enterprise environments
• Experience working within agile software development teams
• Ability to obtain and maintain a government clearance
• Ability to travel onsite to a NASA location for badging and program support
• Strong preference for candidates who can work onsite in Greenbelt, MD as needed

• Experience supporting NASA or federal civilian agencies
• Experience with event‑driven or eventful architectures
• Experience with Spring Batch
• Familiarity with Dev Ops practices and CI/CD pipelines
• Experience modernizing legacy enterprise systems
• Experience working within government consulting or federal contracting environments
• Experience supporting cloud or hybrid‑cloud environments

• Remote role with strong preference for candidates near Greenbelt, MD
• Periodic travel required for NASA badging and onsite activities

• Company‑subsidized health, dental, and vision insurance
• Flexible PTO
• 401(k) with employer match
• Paid parental leave after one year of service
• Employee Assistance Program

The anticipated salary range for this role is $130,000 - $145,000 annually
.

Ad Hoc LLC is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, national origin, ancestry, sex, sexual orientation, gender identity or expression, religion, age, pregnancy, disability, work‑related injury, covered veteran status, political ideology, marital status, or any other factor protected by law.