Senior Backend Java Engineer: Remote + NASA

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Current job opportunities are posted here as they become available.

Remote with Preference for Greenbelt, MD
Occasional Travel Required for NASA Site Access and Badging

Ad Hoc is a technology company that empowers organizations to deliver scalable, impactful digital services. Using modern, agile methods, our team creates products that meet people’s needs and transform their experience of government.

Our collaborations have shaped some of the defining moments in public‑sector service delivery. We’ve helped build products that connect Veterans to tailored services, help millions access affordable health care, and support important programs across the federal government.

Our culture, communications, and tools are built for remote work, enabling us to bring together top talent nationwide. At Ad Hoc, remote life empowers our teams to design work environments that fit their lives while fostering flexibility, collaboration, and strong outcomes for our customers.

Ad Hoc values acceptance, accountability, and humility. We build small, inclusive teams that collaborate closely with our partners to solve meaningful problems and deliver software that works.

The Federal Civilian business unit supports many customers spanning the federal, commercial, and nonprofit space. Our customers include NASA, the General Services Administration, Office of Personnel Management, the Library of Congress, Health & Human Services, and the FDIC. We partner with these agencies to build new capabilities, deliver products, establish data as a strategic asset for informed decision‑making, modernize legacy systems, and build the digital service infrastructure necessary to scale their mission impact.

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
• 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,…