Leidos has an exciting opportunity for a MarkLogic Developer SME in our Intel Security Sector's Analysis Solutions Business Area Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security!
This Java Developer role with expertise in developing MarkLogic based applications provides Agile DevOps support to mission-critical systems. You will have the opportunity to build and maintain systems, software, and cloud environments, while providing operations and maintenance for critical systems. In this role, you will also design, develop, and implement applications utilizing MarkLogic databases with business logic written in XQuery. Additionally, based on a DevOps framework, you will participate in and/or direct major deliverables of projects through all aspects of the software development lifecycle, including scope and work estimation, architecture and design, coding, and unit testing.
Job Responsibilities
Design and develop solutions integrating MarkLogic with existing enterprise platforms and systems.
Develop XQuery, JavaScript, and REST modules on the MarkLogic technology stack.
Develop Entity models and participate in software programming initiatives using HTML, CSS, JavaScript, Java, Angular, Python, SpringBoot, and Hibernate.
Develop and direct software system validation and testing methods using Junit and Katalon.
Develop and integrate custom software solutions leveraging automated deployment technologies; while supporting the Agile software development lifecycle following Program SAFe practices.
Analyze (though proof of concept, performance, and end-to-end testing) and effectively coordinate Infrastructure needs driven by developed software to meet customer mission needs.
Implement MarkLogic-based application processes to support Governance, Risk and Compliance initiatives.
Basic Qualifications
7+ years of hands-on application development utilizing the MarkLogic framework.
Strong analytical and design skills, with the ability to translate business requirements into efficient and effective technical designs within large-scale, well-structured enterprise environments.
Significant experience in the development of service-oriented architecture applications.
Good understanding of Object-Oriented Design and Design Patterns.
Significant experience implementing the MarkLogic java-client-api within an enterprise application.
Strong knowledge of XQuery, FLWOR queries, JavaScript, MarkLogic, SPARQL, RDF data, XML Data, triple-stores, XML Processing.
In-depth experience with Java and data processing, manipulation or querying (SQL and NoSQL).
Masters with 15 or more years of relevant experience or a PhD with 13 or more years of relevant experience. Additional years of experience may be substituted in lieu of a degree.
TS/SCI with a polygraph is required for consideration.
Preferred Qualifications
Experience developing in or deploying to AWS.
At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you – apply today.
CABARESTON
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.
January 21, 2026
For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Pay Range $154,050.00 - $278,475.00
The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
Leidos is a Fortune 500® innovation company rapidly addressing the world’s most vexing challenges in national security and health. The company's global workforce of 48,000 collaborates to create smarter technology solutions for customers in heavily regulated industries. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $15.4 billion for the fiscal year ended December 29, 2023.
Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®.
Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos.
Your most important work is ahead, visit careers.leidos.com for our latest opportunities.
