Sr. Marklogic Developer

Leidos LLC; Plyers Mill Estates (MD); On-site; USD 108,000 - 195,000; Full time

Benefits offered by this job

Paid Time Off

11 paid Holidays

401K with company match

Flexible Schedules

Discounted Stock Purchase Plans

Technical Upskilling

Education and Training Support

Parental Paid Leave

Job summary

Leidos LLC is seeking a Sr. MarkLogic Developer to design, build, and maintain MarkLogic-based applications with business logic in XQuery. The role includes Agile DevOps support to mission-critical systems and cloud environments, with opportunities to influence architecture and project scope through the SDLC.

You will work with MarkLogic databases, Java, JavaScript, Angular, Python, SpringBoot, and Hibernate, contributing to validation, testing, and automated deployments in a SAFe framework.

Qualifications

• 4+ years hands-on development with MarkLogic in enterprise environments.
• Strong knowledge of XQuery, JavaScript, and REST services.
• Experience with Java, OO design and design patterns.
• TS/SCI with polygraph is required for consideration.

Responsibilities

• Design and develop MarkLogic-based solutions integrated with enterprise platforms.
• Develop XQuery, JavaScript, and REST modules on the MarkLogic technology stack.
• Create entity models and develop software using Java, Angular, Python, SpringBoot, and Hibernate.
• Develop and direct software system validation and testing methods using JUnit and Katalon.
• Develop and integrate solutions leveraging automated deployment technologies within a SAFe Agile lifecycle.

Skills

MarkLogic

XQuery

JavaScript

Java

REST

Angular

Python

SpringBoot

Hibernate

JUnit

Katalon

Education

Bachelor's degree or Master's degree

Tools

MarkLogic Java Client API

Job description

Leidos has an exciting opportunity for a Sr. MarkLogic Developer 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!

Job Summary

This Java Developer role with strengths 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.

Basic Qualifications

4+ 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 Significant experience with Java and data processing, manipulation or querying (SQL and NoSQL). Bachelors with 8+ years of relevant experience or a Masters with 6 or more years of relevant experience. Will consider work experience 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 –

#CABARESTON #ASBA #HALO

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.

Original Posting: 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: Pay Range $107,900.00 - $195,050.00 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.

Company Overview

Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.