Full-Time
Full Stack Software Developer
Posted on 12/13/2025
Leidos
10,001+ employees
Defense, intelligence, and civil IT solutions
Compensation Overview
$87.1k - $157.4k/yr
Company Historically Provides H1B Sponsorship
St. Louis, MO, USA
In Person
US Citizenship, US Top Secret Clearance, Canada Citizenship, Canada Top Secret Clearance, UK Citizenship, UK Top Secret Clearance Required
 Software Engineering (1) |
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- Requires BS degree and 4+ years of prior relevant experience or Masters with 2+ years of prior relevant experience.
- Must have an active Top Secret to be considered and ability to obtain TS/SCI clearance prior to start and willingness and ability to obtain a Polygraph
- Minimum 3 years of experience with REACT or modern JavaScript framework.
- Minimum 3 years of experience with Python, C# development framework
- At least 3 years of experience with unit testing, continuous integration tools, and Gitlab version control
- Proactive self-starter demonstrates a positive, willing attitude and excellent oral and written communication skills.
- Experience in either software development projects or software integration projects in a service-oriented environment (Cloud, SOA, Web-Services) or virtualization environment.
- Organizational Skills: Can plan and prioritize work. Follows tasks to their logical conclusion and makes sure that everything has been done to the right standard. Good attention to detail.
- Communications: Ability to communicate clearly and efficiently to team members and clients, verbally and in writing. Able to present ideas in a variety of ways depending upon audience and context.
- The applicant must possess deep understanding of core AWS services, like compute, storage and be able to develop and deploy cores services (Lambda, EC2s).
- C#/Java and JavaScript/TypeScript, Python, Shell scripting.
- This role includes creation and documentation of new and existing functionality within software version control repositories (gitlab) and utilizing DevOps principals and tools to deliver new features within an Agile construct.
- Participate in program Agile software development initiatives (standup, planning, Increment planning) to support innovation and enhancement of custom applications through iteration/functionality testing utilizing Atlassian (Jira/Confluence)
- Primary responsibilities will involve using cloud computing expertise to provide the system administration and modification of existing GOTS code to integrate open-source software solutions for display in a web application. This role includes API development and database integration for interaction with Redux and React frameworks, using various open-source packages for visualization and data filtering and code modifications that shall apply best practices in unit and build testing.
- Participate and collaborate with team members to assess tickets to ensure proper testing and delivery of functionality per User Story Acceptance Criteria
- AWS Developer Solutions Mindset
- At least 3 years of experience with Linux and/or Windows system administration
- At least 2 years of experience with DoD Aeronautical Datasets
- At least 1 year of experience with AWS cloud formation templates
- At least 1 year of experience with Node, NPM, Swashbuckle, REST API, Sass
- AWS Solutions, Developer, DevOps certification
- Team Collaboration tools (Jira, Confluence)
- Active TS/SCI with Polygraph
- DOD 8570 Compliant Certification (Sec+)
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
Simplify's Take
What believers are saying
- Leidos won $2.7B US Army hypersonic weapons contract in 2026 accelerating production.
- Leidos secured $869M AI contract for battlefield decision-making across domains.
- Leidos raised 2026 revenue guidance to $18.2B after Q1 $4.4B beat.
What critics are saying
- Amadeus acquires Idemia PS for $1.4B, disrupting Leidos biometric partnership within 6 months.
- CFIUS blocks Hanwha Ocean partnership, forfeiting Leidos multi-billion Navy contracts in 12 months.
- TSA diverts $12B funds, delaying Leidos eGates deployments and causing revenue shortfalls in 3 months.
What makes Leidos unique
- Leidos' Gibbs & Cox designed 70% of U.S. Navy surface combatants since WWII.
- Leidos merged with Lockheed Martin IS&GS in 2016, creating largest defense IT provider.
- Leidos originated as employee-owned SAIC founded by J. Robert Beyster in 1969.
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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
Company News
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.
Leidos (NYSE: LDOS) doubles energy reach with $2.4B Entrust deal. Filing Impact Filing Sentiment Rhea-AI Filing summary. Leidos Holdings, Inc., through its subsidiary Leidos, Inc., has completed its acquisition of KENE Parent, Inc., known as ENTRUST Solutions Group, for $2,400,000,000 in cash under a previously announced Stock Purchase Agreement. The deal transfers all issued and outstanding Entrust shares to Leidos, with the price subject to customary cash, debt, expense and net working capital adjustments. ENTRUST adds more than 3,100 professionals focused on electric grid engineering and natural gas infrastructure and effectively doubles Leidos' presence in the energy infrastructure market. Leidos highlights that ENTRUST broadens its power delivery engineering capabilities, expands its base of utility customers, and supports the energy growth pillar of its NorthStar 2030 strategy. Leidos reported approximately $17.2 billion in annual revenue for the fiscal year ended January 2, 2026. Insights. Leidos closes a sizable, strategic $2.4B energy infrastructure acquisition. The company has finalized its all-cash $2,400,000,000 purchase of ENTRUST Solutions Group, acquiring all outstanding shares under a Stock Purchase Agreement. ENTRUST brings more than 3,100 specialists in electric grid and natural gas infrastructure, immediately expanding Leidos' capabilities and customer reach in utility markets. Management states the deal effectively doubles Leidos' presence in the energy infrastructure market and supports the energy growth pillar of its NorthStar 2030 strategy. With Leidos reporting about $17.2 billion in annual revenue for the year ended January 2, 2026, this is a meaningful bolt-on transaction, though financial accretion, synergies and integration progress are not quantified in this disclosure. 8-K event classification. 4 items: 1.01, 2.01, 7.01, 9.01 03/30/2026 - 06:09 AM Faq. What did Leidos (LDOS) acquire in this 8-K filing? Leidos, through its subsidiary, acquired all outstanding shares of KENE Parent, Inc., known as ENTRUST Solutions Group. ENTRUST provides engineering, consulting, design and data solutions for utilities and operators, strengthening Leidos' energy infrastructure and grid modernization capabilities across North America. How much did Leidos (LDOS) pay to acquire ENTRUST Solutions Group? Leidos paid approximately $2,400,000,000 in cash to acquire ENTRUST, with the price subject to customary adjustments for cash, debt, transaction expenses and net working capital. The consideration is all-cash and transfers all issued and outstanding shares of ENTRUST to Leidos' subsidiary. When did Leidos (LDOS) complete the ENTRUST acquisition? Leidos completed the ENTRUST acquisition on March 27, 2026, when its subsidiary closed the previously announced Stock Purchase Agreement. A related press release dated March 30, 2026, announced the closing and described how the deal fits within Leidos' long-term NorthStar 2030 energy strategy. How does the ENTRUST acquisition affect Leidos' energy infrastructure business? The acquisition effectively doubles Leidos' presence in the energy infrastructure market by adding more than 3,100 professionals with electric grid and natural gas expertise. It broadens power delivery engineering capabilities and expands Leidos' utility customer base, supporting its energy-focused growth pillar. How large is Leidos compared with the ENTRUST transaction value? Leidos reported approximately $17.2 billion in annual revenue for the fiscal year ended January 2, 2026. Against this backdrop, the roughly $2.4 billion all-cash ENTRUST acquisition represents a significant but not transformational investment in its energy infrastructure strategy. Filing exhibits & attachments. 4 documents Press releases.
Christopher Craige joins Leidos as VP, USAF strategic account executive. The latest appointment at Leidos underscores the growing focus on strengthening Air Force partnerships and advancing air and space priorities across the defense sector. Attend the 2026 Air and Space Summit to join the conversation shaping next-generation air and space capabilities. Register now! In a LinkedIn post, the company said Craige will help strengthen its relationship with the Department of the Air Force and support air and space strategic initiatives. Who is christopher Craige? Craige most recently served as chief operating officer at Business Executives for National Security. He is a distinguished graduate of the U.S. Air Force Academy with over three decades of leadership experience. He served as a command pilot flying the F-15E, C-130 and MC-12, including combat operations in Iraq and Afghanistan. He held senior roles across joint service commands and worked with military branches, federal agencies and congressional stakeholders. He commanded operations at Incirlik Air Base in Turkey during NATO's response to the Syrian civil war and later led an Air Expeditionary Wing in Kabul, Afghanistan. Craige also served as a combatant command strategist focused on Africa, chief of staff for a major command overseeing Europe and Africa operations, and the Air Force's military aide to the vice president. How does Leidos support Air Force operations? Leidos supports the Air Force through cloud modernization, managed IT services and mission systems support. The company secured a task order worth up to $455 million to provide Cloud One architecture and shared services. In addition, Leidos won a $149 million contract from the service to provide managed services for Project Night Owl, including network, application, infrastructure and security support for a critical national security system. The company has also partnered with the Air Force to launch an IT help desk facility at the Pentagon.
John Solly, a former Department of Government Efficiency operative, has been identified as the individual accused in a whistleblower complaint of planning to share sensitive Social Security Administration data with his new employer. Multiple sources confirmed Solly's identity to WIRED. Since October, Solly has served as chief technology officer for the health IT division of government contractor Leidos, which holds contracts with SSA potentially worth up to $1.5 billion. The complaint alleges Solly told colleagues he stored SSA's Numerical Identification System and death master file data on a thumb drive and sought help transferring it to a personal computer. Solly, through legal counsel, denied any wrongdoing. Leidos also stated it found no evidence supporting the allegations. At SSA, Solly supported DOGE initiatives including Digital SSN and death master file cleanup.
Leidos secures $454.9m contract to modernise USAF Cloud One platform. Leidos will partner with AWS, Azure, Google Cloud, and Oracle to modernise the US Air Force's multi-cloud environment. Leidos has secured a $454.9m contract to upgrade the US Air Force's Cloud One platform, a central technology resource supporting mission-critical operations across the Department of Defense (DoD). The initiative involves collaboration with major cloud service providers, including Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform, and Oracle Cloud Infrastructure. The project aims to enhance the security and automation of the platform while streamlining operations and reducing costs for Air Force teams managing cloud environments. According to Leidos, these improvements are expected to facilitate quicker management of cloud operations and simplify the adoption and scaling of cloud services across additional Air Force units. The Cloud One programme aims to accelerate cloud adoption throughout the Air Force globally, bolster cyber defences, and support operational readiness. Leidos digital modernisation division president Steve Hull said: "Modernising Cloud One helps the Air Force deploy mission-critical operations faster and defend them more effectively. It also creates a secure, repeatable cloud foundation that other Department of War organisations can adopt, helping to remove barriers to cloud adoption and enabling teams to move faster and more securely to help meet mission demands and maintain a strategic edge." GlobalData Strategic Intelligence US tariffs are shifting - will you react or anticipate? Don't let policy changes catch you off guard. Stay proactive with real-time data and expert analysis. By GlobalData Cloud One serves as the primary platform providing secure access to cloud technologies and services from leading vendors such as AWS, Microsoft Azure, Oracle Cloud Infrastructure, and Google Cloud. Within this programme, Leidos provides solutions that facilitate the Air Force's move to cloud-based systems. The company states that this project is consistent with its NorthStar 2030 strategy, which prioritises large-scale technology and cybersecurity modernisation efforts for the federal government. Last month, Oracle received an $88m firm-fixed price task order from the US Department of the Air Force to supply Oracle Cloud Infrastructure services specifically for the programme.