Full-Time

Software Engineer

Updated on 8/1/2026

Leidos

Leidos

10,001+ employees

Defense, intelligence, and civil IT solutions

Compensation Overview

$57.9k - $104.6k/yr

+ 401(k) match of 6%

No H1B Sponsorship

Annapolis Junction, MD, USA

In Person

US Top Secret Clearance Required

Category
Software Engineering (1)
Required Skills
WebLogic
Kubernetes
jQuery
Tomcat
Agile
Python
JavaScript
OpenShift
JUnit
Microsoft Windows
Bootstrap
Groovy
Java
Postgres
Docker
Mockito
Version Control
Cryptography
Jenkins
Maven
MongoDB
SCRUM
REST APIs
C/C++
Selenium
DevOps
Oracle
Linux/Unix
Angular
Spring
HTML/CSS

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Requirements
  • A Bachelor of Science degree or equivalent experience is required; additional experience may substitute for the degree.
  • Less than 2 years of prior relevant experience is required.
  • Demonstrated experience with Java is required.
  • Experience with or familiarity with multiple Java frameworks is required, including Spring Boot, Spring Data, Java Enterprise Edition, Java Persistence API, Enterprise JavaBeans, Java Transaction API, Servlet, Jackson, Jersey, Swing, and JavaFX.
  • Experience with or familiarity with multiple programming languages is required, including JavaScript, Python, C, C++, Groovy, and Structured Query Language.
  • Experience with development integrated development environments such as Eclipse, Visual Studio Code, Visual Studio, Rhapsody, and WebStorm is required.
  • Experience with databases such as Oracle, PostgreSQL, MongoDB, and SQL Server is required.
  • Experience with web application user interface development, database structures, Spring Framework, and/or AngularJS, JavaScript Object Notation, HTML, XML, and Extensible Stylesheet Language Transformations is required.
  • Experience with software source control and configuration management tools is required.
  • Experience with technologies underlying cryptographic systems, including symmetric and asymmetric cryptography, ASN.1 encoding, XML canonicalization, and digital signatures, is required.
  • Experience developing on Windows and/or Linux operating systems is required.
  • Documented professional experience with web services is required.
  • A strong understanding of sound software development principles and practices is required.
  • The ability to plan and prioritize personal tasking and communicate effectively verbally and in writing is required.
  • The ability to work independently and with a team in a fast-moving environment while producing high-quality work is required.
  • An active Top Secret/Sensitive Compartmented Information clearance with a polygraph on the first day is required.
Responsibilities
  • Perform software development lifecycle activities independently and as a member of an Agile development team building a complex enterprise system.
  • Translate Agile user stories into implementable concepts through development, unit testing, integration and testing, and deployment of new capabilities.
  • Implement robust testing using the Behavior-Driven Development pattern and DevOps automation, including commercial test automation tools where appropriate.
  • Implement server-side business logic, client web applications, user interfaces, and special-purpose device programming as assigned.
  • Participate in daily stand-ups, Sprint Planning, Program Increment Planning, and related team activities.
  • Analyze and study complex system requirements and use design software tools, formal specifications, data flow diagrams, and accepted design techniques.
  • Apply software engineering principles to produce code that is modifiable, efficient, reliable, understandable, fault tolerant, and reusable.
  • Provide software process management and control throughout the coding portion of the software development process.
  • Promote code reuse and cross-program collaboration while reducing maintenance costs by creating common functions and shared actions for developers and testers.
  • Engineer, author, tune, and document automation scripts in a development environment and deploy them to the test or production bench.
Desired Qualifications
  • Experience with Java Enterprise Edition, including Enterprise JavaBeans, Java Persistence API, Java Transaction API, Java API for XML Binding, Java API for RESTful Web Services, and Java API for XML Web Services; Structured Query Language; application servers such as Tomcat, WebLogic, and JBoss; Spring Framework; and scripting.
  • Experience or familiarity with XML, XML Schema Definition, Simple Object Access Protocol, Web Services Description Language, Extensible Stylesheet Language Transformations, Representational State Transfer, JavaScript Object Notation, YAML, Docker, Podman, Kubernetes, and OpenShift.
  • Experience with JavaScript frameworks including AngularJS, Bootstrap, and jQuery.
  • Experience with testing and mocking frameworks including JUnit, Jupiter, Mockito, Jasmine, Karma, Cucumber, Unified Functional Tester, Selenium, and FITNesse.
  • Experience with build tools including Maven, CMake, RPM, Jenkins, and Nexus.
  • Experience with high-level requirements management, including requirements decomposition, secure systems engineering and development, trade-off analysis, interface control, testing, and continuous integration.
  • Experience developing software on Agile teams using Agile Developer practices such as pair programming, test-driven development, refactoring, and acceptance test-driven development.
  • Experience with Behavior-Driven Development.
  • Experience with secure software development, including Layer 7 Policy.
  • Experience with Scrum, the Scaled Agile Framework methodology, SAFe Agilist Certification, or membership on an Agile team.

Leidos is a large technology and engineering company that serves defense, intelligence, healthcare, and civil government customers. It provides scientific, engineering, and IT solutions to help ensure safety, health, and efficiency, from upgrading air traffic control to strengthening cybersecurity for critical missions. The company delivers integrated systems and services—software, research, cyber defense, and digital modernization—through programs that span government and commercial clients. Leidos stands out through its long history as SAIC’s split-off and rapid growth via major acquisitions, creating a broad, mission-focused portfolio across defense, space, intelligence, and civilian sectors. Its overarching goal is to help customers solve hard problems with advanced technology, enabling safer operations and better public services.

Company Size

10,001+

Company Stage

IPO

Headquarters

Reston, Virginia

Founded

1969

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Simplify Jobs

Simplify's Take

What believers are saying

  • The July 2026 Rune partnership enables AI-driven predictive sustainment for Indo-Pacific military logistics.
  • June 2026 JMT SATCOM tool cuts military reporting time by 85% using modular commercial software.
  • Luke Thomas' VP appointment in 2026 expands VA-focused healthcare modernization with decade of VA growth experience.

What critics are saying

  • Amentum's 2024 Consolera acquisition directly erodes Leidos' federal health revenue base within 6–12 months.
  • Booz Allen Hamilton's 2025 CDAO win blocks Leidos' expansion into high-value FBI and DHS AI contracts.
  • Accenture Federal Services' $3B 2025 VA T4NG2 contract competes directly with Leidos' veterans affairs expansion efforts.

What makes Leidos unique

  • Leidos uniquely merges Dynetics defense research with HeadWay Mission OS for integrated AI solutions.
  • Its 2016 Lockheed Martin IT merger created the largest federal technology contractor outside traditional giants.
  • Leidos operates as a Fortune 500 firm with 50,000+ employees focused on national security and digital modernization.

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Benefits

Medical, dental, & vision insurance

Health Savings account

Income protection

PTO

Paid parental leave

Jury duty pay

Bereavement leave

401(k) Retirement Plan

Employee Stock Purchase Plan

Family Benefits

Growth & Insights and Company News

Headcount

6 month growth

8%

1 year growth

8%

2 year growth

8%
Arora Engineers
Jul 22nd, 2026
Arora welcomes Enrique Melendez, Director of Aviation Technology Planning.

Arora welcomes Enrique Melendez, Director of Aviation Technology Planning. Arora Engineers (Arora) is proud to welcome Enrique Melendez, C.M., PMP, as Director of Aviation Technology Planning. Enrique brings more than 30 years of aviation technology leadership experience, helping airports around the world modernize operations through innovative IT, security, systems integration, and digital transformation solutions. Throughout his career, he has partnered with airports, airlines, and federal agencies to deliver technology strategies that improve operational efficiency, enhance the passenger experience, and prepare airports for the future. As Director of Aviation Technology Planning, Enrique will lead the expansion of Arora's Airport Technology Planning and Advisory services, supporting clients with airport technology master planning, digital airport initiatives, operational technology (OT) consulting, systems integration, technology roadmaps, and owner advisory services. He will also help strengthen Arora's aviation consulting practice by building relationships with airport leaders and advancing innovative technology solutions that complement the firm's engineering and design expertise. Enrique joins Arora following leadership roles with The JW Group, Leidos, Jacobs, Faith Group, and ARINC, where he led major airport technology programs across North America and internationally. His experience spans more than 80 airports and includes pioneering work in airport operations centers, common-use systems, enterprise data strategies, biometrics, artificial intelligence, and intelligent airport technologies. Beyond his consulting experience, Enrique is an active leader in the aviation industry. He is a Certified Member of the American Association of Airport Executives (AAAE) and serves on the Airports Council International (ACI) Board of Directors, where he is a member of the IT and Security Committee, the BIT Steering Group, and Co-Lead of the Data Analytics Working Group. He has also served on the Airport Consultants Council (ACC) Board of Directors and as former Chair/Vice-Chair of the Information Technology & Systems Committee. Additionally, Enrique is a former BWI Airport Commissioner, a TSA Airport Security Design Guideline Chapter Leader, a Transportation Research Board/Airport Cooperative Research Program (TRB/ACRP) IT Panel Member, and a member of the Project Management Institute (PMI). Please join Arora Engineers in welcoming Enrique to Arora Engineers. Arora Engineers look forward to the expertise and leadership he will bring as Arora Engineers continue delivering innovative infrastructure solutions for its aviation clients.

OmniAir Consortium
Jun 15th, 2026
First successful end-to-end over-the-air Misbehavior Detection and automated V2X security enforcement.

First successful end-to-end over-the-air Misbehavior Detection and automated V2X security enforcement. June 15, 2026 At the OmniAir Maryland Plugfest on Wednesday, June 3, with a focus on Cybersecurity, OmniTrust, and Leidos successfully demonstrated the first end-to-end over-the-air (OTA) misbehavior detection workflow, triggering a complete V2X security response pipeline after eight years of technology introduction and evolution. Rather than stopping at message generation and validation, the demonstration exercised the full operational chain, showing how misbehavior can be detected, reported, processed, and enforced across a live, interoperable environment. The demonstrated workflow aligns with established V2X security standards: message signing and verification follow IEEE 1609.2; certificate provisioning and revocation are managed in accordance with IEEE 1609.2.1; and misbehavior reporting and processing are consistent with SAE J3287. Qualcomm provided the V2X platform and misbehavior detection capabilities, OmniTrust supplied the Security Credential Management System (SCMS) services, and Leidos integrated the end-to-end workflow and validation processes. During the verification demonstration, a misbehaving Basic Safety Message (BSM) broadcast via Cellular-V2X direct Radio is detected by the Misbehavior Detection and Reporting software. This triggers a sequence of automated security actions. A misbehavior report was generated and securely uploaded to a Security Credential Management System (SCMS) provider, where both the report and the associated BSM signature were validated. The SCMS provider then issued an updated Certificate Revocation List (CRL), which was distributed across the network. On-board units (OBUs) and roadside units (RSUs), including the originating device, successfully updated their CRLs, preventing the misbehaving device from signing or transmitting additional messages. The most significant aspect of the demonstration was that every participating device independently received, processed, and enforced the updated CRL without interoperability issues. The exercise also included two distinct V2X modules built on different hardware platforms, Intelligent Transportation System (ITS) protocol stacks, and security implementations, validating cross-vendor interoperability under realistic operating conditions. Building on this success, OmniTrust and Leidos utilized OmniAir's test cases developed specifically for SAE J3287 standards, which verified interoperability for misbehavior detection and reporting (MBD/MBR) with multiple independent SCMS providers, including SAESOL Tech and Autocrypt. These achievements directly support the broader objectives of the USDOT Misbehavior Test Tool, which is designed to verify V2X message integrity, identify anomalous behavior, and confirm that communications originate from trusted, properly credentialed sources. By enabling end-to-end misbehavior detection and response, the tool strengthens the integrity of safety-critical data and reinforces confidence in connected vehicle communications. More broadly, this milestone highlights the value of industry collaboration in advancing interoperable V2X security. Rather than validating isolated components, the Plugfest testing exercised a complete security workflow spanning detection, reporting, credential management, and enforcement across multiple vendors and implementations. The successful execution of this end-to-end process represents an important step toward scalable, secure, and resilient connected-vehicle deployments, demonstrating that connected-vehicle systems can not only communicate effectively but also respond appropriately to security threats and misbehavior. With the methodology proven, misbehavior attributes can be expanded to encompass critical BSM elements, thereby providing trusted communications. About OmniAir Consortium OmniAir Consortium is the leading industry association promoting interoperability and certification for ITS, tolling, and connected vehicles. OmniAir's membership includes public agencies, private companies, research institutions, and independent test laboratories. Learn more at www.omniair.org.

ATC Network
May 19th, 2026
Leidos to highlight innovative models for Air Traffic modernisation at Airspace World 2026.

Leidos to highlight innovative models for Air Traffic modernisation at Airspace World 2026. Tuesday, May 19, 2026 10:01 AM - Lisbon, Portugal. Leidos (NYSE:LDOS) will highlight new approaches to air traffic management (ATM) modernisation at Airspace World 2026, the world's largest ATM event organized by the Civil Air Navigation Services Organisation (CANSO). With a focus on improving efficiency, resilience and collaboration across the aviation industry, Leidos and its partners will be demonstrating innovative solutions designed to help air navigation service providers (ANSPs) modernize operations and manage increasingly complex airspace. At Airspace World 2026, Leidos and its partners will share how this shift is being applied in practice through the following sessions: * 26 May at 12:00 (GMT+1) From Critical Corridor to Competitive Advantage: How Kazakhstan is Turning Strategic Airspace into a Model for Modern ATM Kazaeronavigatsia Director General, Faat Bogdashkin, will join Leidos SkyLine Portfolio Manager Kenneth Folger to discuss Kazakhstan's national ATM transformation. With passenger traffic projected to reach 26 million by 2030 and rapid expansion of international routes, the ANSP is modernizing to enhance safety, scalability, and operational efficiency across a critical global air corridor. * 27 May at 13:30 (GMT+1) Advancing ATM Through ANSP and Industry Partner Co-Development Leidos Senior Director of ATM, Will Estrada, will explore how co-development enables ANSPs to accelerate modernization through closer collaboration with industry partners. This approach supports more agile delivery, reduces reliance on proprietary solutions, and helps build long-term internal capability. "Airspace World provides an important platform to share what's working in real-world operations," said Jim Preaskorn, vice president of Air Traffic at Leidos. "We look forward to showcasing how we're helping ANSPs modernize systems in a way that improves performance today while preparing for future demand." "Air traffic management is undergoing a period of significant transformation," said Simon Hocqueard, CANSO President & CEO. "Collaboration between ANSPs, airlines and industry partners is critical to delivering the future capabilities of air traffic management. Airspace World brings together global leaders to share expertise and show innovations that drive progress across the world's airspace." As a platinum sponsor of Airspace World 2026, Leidos will also showcase demonstrations of its SkyLine-X(TM) air traffic management system. Attendees are invited to attend these sessions and visit the Leidos at booth H1-D52 or visit leidos.com/airspace-world to learn more.

MilitaryLeak
May 16th, 2026
Leidos awarded US Department of War contract to build 3,000 Low-Cost Containerized Munitions (LCCM).

Leidos awarded US Department of War contract to build 3,000 Low-Cost Containerized Munitions (LCCM). May 16, 2026 America's warfighters will receive an initial 3,000 Leidos (NYSE: LDOS) Low-Cost Containerized Munitions (LCCM) through a framework agreement with the Department of War that advances President Donald J. Trump and Secretary of War Pete Hegseth's "Arsenal of Freedom" initiative. The new cruise missile is expected to significantly enhance the country's ground-launched combat capability, demonstrating Leidos' ability to rapidly scale defense production and deliver decisive capabilities to the U.S. military. Leidos will expand its workforce and enhance its facilities in Huntsville, Alabama, and McEwen, Tennessee, to produce the LCCM. Consistent with the DoW's desire to utilize commercial products, development of Leidos' LCCM is company-funded, leveraging the technologies in its AGM-190A Small Cruise Missile (SCM) program. "We're answering the Department of War's call to revolutionize the procurement of critical capabilities at scale, with a focus on speed to operational capability," said Leidos Chief Executive Officer Tom Bell. "This agreement reflects the department's appreciation of Leidos' defense tech prowess and their trust in our proven history in delivering advanced missile technologies." Leidos started LCCM work in December, reaching a conceptual design with the Pentagon that is capable of achieving all mission objectives. Full system design, development and test will result in production beginning in 2027. At approximately twice the size of the AGM-190A, the LCCM offers increased mission effectiveness and fuel capacity to maximize range. Building on the Leidos Small Cruise Missile's heritage, the LCCM leverages key design features including a modular airframe and a common Weapon Open Systems Architecture (WOSA) to enable rapid integration, upgrades and mission adaptability. The design also utilizes Leidos' established supply chain and scalable production approach. While initially ground-launched, LCCM's modular design could also support maritime platform integration and air-launched variants. Leidos' decision to fund development and expand its production capabilities reflects its commitment to advancing operational capabilities through its NorthStar 2030 strategy. Leidos is a proven leader in the design, development and integration of advanced missile systems, launchers and precision strike technologies for the U.S. military. In addition to the AGM-190A, Leidos is the prime contractor for the U.S. Army's Indirect Fire Protection Capability Increment 2 (IFPC 2) system and supports next-generation hypersonic strike capabilities through its work on the Common Hypersonic Glide Body. The company also delivers precision munitions integration and advanced guidance and sensor technologies that strengthen integrated air and missile defense architectures. Post Views: 61

Yahoo Finance
Mar 31st, 2026
Leidos raises $1.39B in notes to fund Entrust acquisition, secures $454.9M Air Force cloud contract

Leidos Holdings raised $1.39 billion through senior notes maturing in 2029 and 2036 to fund its acquisition of KENE Parent, the owner of Entrust. The notes include a special mandatory redemption clause at 101% of principal if the transaction isn't completed by mid-August 2026. The Virginia-based defence and technology company also secured a $454.9 million contract to modernise the US Air Force's Cloud One platform, partnering with Amazon and Google to enhance security and automation. Founded in 1969, Leidos serves defence, intelligence, civil and health markets, offering solutions in cybersecurity, data analytics and systems engineering. The company maintains strategic flexibility to use the note proceeds for general corporate purposes if needed.