Sr. Software Engineer TS/SCI Polygraph
$131K - $237K/yr
Must have an active TS/SCI Polygraph up front. No exceptions.* You will perform software ... Experience in software development on Agile teams using Agile Developer practices such as Pair ...
$131K - $237K/yr
Must have an active TS/SCI Polygraph up front. No exceptions.* You will perform software ... Experience in software development on Agile teams using Agile Developer practices such as Pair ...
$131K - $237K/yr
Must have an active TS/SCI Polygraph up front. No exceptions.* You will perform software ... Experience in software development on Agile teams using Agile Developer practices such as Pair ...
An active TS SCI within the past 2 years is mandatory. Technology stacks typically include several ... Software Engineers: BSEE/CE/CS or equivalent with a minimum of 3 years in design, implementation ...
An active TS SCI within the past 2 years is mandatory. Technology stacks typically include several ... Software Engineers: BSEE/CE/CS or equivalent with a minimum of 3 years in design, implementation ...
... software development management * Experience with systems engineering methods including systems trades, requirements management, performance characterization, and interface management * Active TS/SCI ...
... software development management * Experience with systems engineering methods including systems trades, requirements management, performance characterization, and interface management * Active TS/SCI ...
San Diego, CA · On-site
$86K - $198K/yr
As a full-stack developer, you can resolve a problem with a complete end-to-end solution in a fast ... TS/SCI clearance * Bachelor's degree or 10+ years of experience in software engineering in lieu of ...
San Diego, CA · On-site
$86K - $198K/yr
As a full-stack developer, you can resolve a problem with a complete end-to-end solution in a fast ... TS/SCI clearance * Bachelor's degree or 10+ years of experience in software engineering in lieu of ...
San Diego, CA · On-site
$86K - $198K/yr
As a full-stack developer, you can resolve a problem with a complete end-to-end solution in a fast ... TS/SCI clearance * Bachelor's degree or 10+ years of experience in software engineering in lieu of ...
San Diego, CA · On-site
$86K - $198K/yr
As a full-stack developer, you can resolve a problem with a complete end-to-end solution in a fast ... TS/SCI clearance * Bachelor's degree or 10+ years of experience in software engineering in lieu of ...
... Developer * Active Secret Clearance * Experience designing and implementing APIs and integrating ... Active TS/SCI Clearance Position Location:onsite, in office in San Diego, CA Expected Start date ...
... Developer * Active Secret Clearance * Experience designing and implementing APIs and integrating ... Active TS/SCI Clearance Position Location:onsite, in office in San Diego, CA Expected Start date ...
San Diego, CA · On-site
$86K - $198K/yr
As a full-stack developer, you can resolve a problem with a complete end-to-end solution in a fast ... TS/SCI clearance * Bachelor's degree or 10+ years of experience in software engineering in lieu of ...
San Diego, CA · On-site
$86K - $198K/yr
As a full-stack developer, you can resolve a problem with a complete end-to-end solution in a fast ... TS/SCI clearance * Bachelor's degree or 10+ years of experience in software engineering in lieu of ...
San Diego, CA · On-site
Required : • Ability to obtain a Top Secret (TS) security clearance, for which U.S. citizenship is required by the U.S. Government • 7+ years of experience in relevant software engineering roles ...
San Diego, CA · On-site
Required : • Ability to obtain a Top Secret (TS) security clearance, for which U.S. citizenship is required by the U.S. Government • 7+ years of experience in relevant software engineering roles ...
... software, star trackers, optical systems, separation systems, radios, and more. Our Space Systems ... PRINCIPAL/SENIOR PRINCIPAL ENGINEER - TS/SCI CLEARANCE Based at Rocket Lab's global headquarters in ...
... software, star trackers, optical systems, separation systems, radios, and more. Our Space Systems ... PRINCIPAL/SENIOR PRINCIPAL ENGINEER - TS/SCI CLEARANCE Based at Rocket Lab's global headquarters in ...
... in Physics, Math, or Engineering coupled with a strong software development skillset. The ... Must have an active TS security clearance. * Demonstrated exposure to college level physics, math ...
... in Physics, Math, or Engineering coupled with a strong software development skillset. The ... Must have an active TS security clearance. * Demonstrated exposure to college level physics, math ...
San Diego, CA · On-site
Required : • This position requires the ability to obtain a Top Secret (TS) security clearance ... Government • 7+ years of experience in relevant software engineering roles • Proficient in ...
San Diego, CA · On-site
Required : • This position requires the ability to obtain a Top Secret (TS) security clearance ... Government • 7+ years of experience in relevant software engineering roles • Proficient in ...
Northridge, CA · On-site
$90K - $165K/yr
... in Physics, Math, or Engineering coupled with a strong software development skillset. The ... Must have an active TS security clearance. * Demonstrated exposure to college level physics, math ...
New
Quick apply
Northridge, CA · On-site
$90K - $165K/yr
... in Physics, Math, or Engineering coupled with a strong software development skillset. The ... Must have an active TS security clearance. * Demonstrated exposure to college level physics, math ...
New
$86K - $198K/yr
As a full-stack developer, you can resolve a problem with a complete end-to-end solution in a fast ... TS/SCI clearance * Bachelor's degree or 10+ years of experience in software engineering in lieu of ...
$86K - $198K/yr
As a full-stack developer, you can resolve a problem with a complete end-to-end solution in a fast ... TS/SCI clearance * Bachelor's degree or 10+ years of experience in software engineering in lieu of ...
... software development management * Experience with systems engineering methods including systems trades, requirements management, performance characterization, and interface management * Active TS/SCI ...
Quick apply
... software development management * Experience with systems engineering methods including systems trades, requirements management, performance characterization, and interface management * Active TS/SCI ...
... software development management * Experience with systems engineering methods including systems trades, requirements management, performance characterization, and interface management * Active TS/SCI ...
... software development management * Experience with systems engineering methods including systems trades, requirements management, performance characterization, and interface management * Active TS/SCI ...
Seal Beach, CA · On-site
$66.46 - $75.96/hr
Required Skills: • Active TS/SCI with adjudicated polygraph • 5+ years'experience in ... tier software applications • Experience with Java and Javascript/React • Experience with ...
Seal Beach, CA · On-site
$66.46 - $75.96/hr
Required Skills: • Active TS/SCI with adjudicated polygraph • 5+ years'experience in ... tier software applications • Experience with Java and Javascript/React • Experience with ...
San Diego, CA · On-site
STR is hiring experienced Lead Software Engineers to join our multidisciplinary cyber/networking ... Required : • This position requires the ability to obtain a Top Secret (TS) security clearance ...
San Diego, CA · On-site
STR is hiring experienced Lead Software Engineers to join our multidisciplinary cyber/networking ... Required : • This position requires the ability to obtain a Top Secret (TS) security clearance ...
$157K - $224K/yr
STR is hiring experienced Lead Software Engineers to join our multidisciplinary cyber/networking ... This position requires the ability to obtain a Top Secret (TS) security clearance, for which U.S ...
$157K - $224K/yr
STR is hiring experienced Lead Software Engineers to join our multidisciplinary cyber/networking ... This position requires the ability to obtain a Top Secret (TS) security clearance, for which U.S ...
Seal Beach, CA · On-site
$179K - $212K/yr
Active TS/SCI with Polygraph Required U.S. Citizen required Position Overview OMNI is seeking a Satellite Systems Software Engineer to support a cutting-edge national security space program. In this ...
Seal Beach, CA · On-site
$179K - $212K/yr
Active TS/SCI with Polygraph Required U.S. Citizen required Position Overview OMNI is seeking a Satellite Systems Software Engineer to support a cutting-edge national security space program. In this ...
$157K - $224K/yr
STR is hiring experienced Lead Software Engineers to join our multidisciplinary cyber/networking ... This position requires the ability to obtain a Top Secret (TS) security clearance, for which U.S ...
$157K - $224K/yr
STR is hiring experienced Lead Software Engineers to join our multidisciplinary cyber/networking ... This position requires the ability to obtain a Top Secret (TS) security clearance, for which U.S ...
| Aspect | Software Developer Ts | Software Engineer |
|---|---|---|
| Credentials | Bachelor's in CS or related field, certifications like Microsoft or AWS | Bachelor's or higher in CS, often with additional certifications |
| Work Environment | Development teams, tech companies, startups | Design, development, and testing in tech firms, consulting, or enterprise |
| Industry Usage | Commonly used in tech and software companies | Broader, including systems and software development roles |
| Search & Comparison Intent | Focus on coding, development tasks, and technical skills | Broader scope including system design and architecture |
While both roles involve software creation, Software Developer Ts primarily focus on coding and implementing features, whereas Software Engineer often encompasses system design and architecture responsibilities. The roles overlap significantly, but the title 'Software Engineer' may imply a broader scope of work.
$131K - $237K/yr
Full-time
Medical, Retirement, PTO
Posted 23 days ago
8.4
Based on 146 frontline employees who took The Breakroom Quiz
55th of 427 rated business services
Description
Leidos has an exciting opportunity for a Sr. Software Engineer! *Must have an active TS/SCI Polygraph up front. No exceptions.*
You will perform software development lifecycle (SDLC) activities as both an individual and a member of our top-notch agile development team building a large complex enterprise system. Development includes the full range of turning Agile user stories into implementable concepts, through development, unit testing, integration and test, and deployment of the new capabilities for the large complex enterprise system. Following the Behavior-driven Development (BDD) pattern, developers are responsible for implementing robust testing leveraging DevOps automation and, where appropriate, use of test automation commercial tools. There are a range of opportunities for server-side business logic implementation as well as client web application and user interface (UI) development. Java, Python, embedded C/C++, Java cryptographic framework, XML, web UI (i.e., Angular, JavaScript, CSS, HTML, etc.) and special purpose device programming opportunities are available.
Primary Responsibilities
You will actively participate in daily stand-ups, Sprint Planning, Program Increment (PI) Planning, and other related team activities; analyze and study complex system requirements, use design software tools, provide support using formal specifications, data flow diagrams, and other accepted design techniques and will use sound software engineering principles to ensure that developed code is modifiable, efficient, reliable, understandable, fault tolerant, and reusable. You will provide software process management and control throughout the coding portion of the software development process and will promote code reuse and cross-program collaboration while reducing maintenance costs by creating common functions and shared actions for developers and testers. You will engineer, author, tune and document automation scripts in a development environment and deploy to the test/production bench.
Basic Qualifications
Must have a BS degree and 12 – 15 years of prior relevant experience or Masters with 10 – 13 years of prior relevant experience. Additional experience may be substituted for a degree.
Must have demonstrated experience with Java.
Must have experience or familiarity with multiple Java frameworks: Spring to include Boot and Data, Java Enterprise Edition (JEE) (i.e., JPA, EJB, JTA, Servlet), Jackson, Jersey, Swing, JavaFX.
Must have experience or familiarity with multiple of the following languages such as Javascript, Python, C/C++, Groovy, Structured Query Language (SQL).
Must have experience with development IDEs (Integrated Development Environments) such as Eclipse, Visual Studio Code, Visual Studio, Rhapsody, WebStorm.
Must have experience with databases such as Oracle, PostgreSQL, MongoDB, SQL Server.
Must have experience with Web Application User Interface Development, knowledge of databases and structures, Spring Framework, and/or experience working with AngularJS, JSON, HTML, XML, XSLT.
Must have experience with software source control and configuration management tools.
Must have experience with technologies underlying cryptographic systems (symmetric and asymmetric cryptography, ASN.1 encoding, XML canonicalization, digital signatures).
Must have experience developing on Windows, and/or Linux operating systems.
Must have documented professional experience with web services.
Must have a strong understanding of sound software development principles and practices.
Must be able to plan and prioritize personal tasking and be able to communicate effectively verbally and in writing.
Must be an independent thinker, capable of performing high quality work, both independently and with a team in a fast-moving environment.
Preferred Qualifications
Experience with the following: Java Enterprise Edition (JEE) (i.e., EJB, JPA, JTA, JAX-B, JAX-RS, JAX-WS), SQL, application servers (Tomcat, WebLogic, JBoss), Spring framework, scripting.
Experience or familiarity with multiple of the following technologies: XML/XSD/SOAP/WSDL/XSLT, REST, JSON, YAML, Containers (Docker, Podman, Kubernetes, OpenShift).
Experience with Javascript frameworks: AngularJS, Bootstrap, JQuery.
Experience with Testing and Mocking frameworks: JUnit, Jupiter, Mockito, Jasmine, Karma, Cucumber, Unified Functional Tester (UFT), Selenium, FITNesse.
Experience with build tools: Maven, CMake, RPM, Jenkins, Nexus.
Experience with high level requirements management including requirements decomposition, secure systems engineering and development, trade-off analysis, interface control, and testing and continuous integration.
Experience in software development on Agile teams using Agile Developer practices such as Pair Programming, Test Driven Development (TDD), Refactoring, and Acceptance Test Driven Development (ATDD).
Experience with Behavior Driven Development (BDD).
Secure Software development (i.e., Layer 7 Policy).
Experience with the Scrum, Scaled Agile Framework (SAFe) methodology, SAFe Agilest Certification, or experience as a member of an Agile team.
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:December 8, 2025For 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.
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.
About 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 $16.7 billion for the fiscal year ended January 3, 2025. 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 at www.leidos.com/careers/pay-benefits.
Securing Your Data
Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.
Commitment to Non-Discrimination
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.
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At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers' success. We empower our teams, contribute to our communities, and operate sustainable practices. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community.
It services
10,000+ Employees
Reston, VA, US