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Senior Software Tool Developer (SWE-3) - Careers at Leidos

Leidos

Senior Software Tool Developer (SWE-3) - Careers at Leidos

full-timePosted: Feb 3, 2026

Job Description

Senior Software Tool Developer (SWE-3) at Leidos

Leidos is seeking a Senior Software Tool Developer (SWE-3) to join our cutting-edge team in the Intel Sector, based in Annapolis Junction, MD. This role is pivotal in delivering mission-critical solutions for Security Engineering, Computer Network Operations (CNO), Mission Software, SIGINT, and Cryptographic Key Management. Be part of a fast-paced environment driving rapid prototyping, new development, and advanced technology research to push the boundaries of intelligence analysis.

Key Responsibilities

  • Drive end-to-end capability development, transforming research concepts, software prototypes, and algorithms into deployable tools for cryptanalytic engineering and analysis.
  • Leverage expertise in enterprise Java to enhance existing tools, incorporating new parameters, performing architecture reviews, and managing releases, testing, debugging, and user support.
  • Collaborate closely with mission stakeholders, researchers, and end users to create innovative, daily-use tools that elevate cryptanalytic tradecraft.

Required Qualifications

  • Bachelor's degree with 11+ years of software development experience or equivalent.
  • Proficiency in JAVA, Python, Rust, C++, TypeScript, Visual Studio, and GitLab.
  • Active TS/SCI with Polygraph clearance.

Desirable Skills

  • Graph representation and transformation to alternative structures.
  • Digital logic emulation and object-oriented re-architecture.
  • File parsing, generation, and optimization frameworks.

Why Leidos?

Join a team that outthinks, outbuilds, and outpaces the status quo. Enjoy competitive benefits including PTO, 11 paid holidays, 401K with 6% match, flexible schedules, education support, and more. Make a real impact on national security in a collaborative, prototype-driven program. Learn more about our LOE program.

Pay Range: $107,900 - $195,050 USD annually. Apply today to disrupt and innovate!

Locations

  • Annapolis Junction, Maryland, United States

Salary

107,900 - 195,050 USD / yearly

Estimated Salary Rangehigh confidence

107,900 - 195,050 USD / yearly

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • Javaintermediate
  • Pythonintermediate
  • Rustintermediate
  • C++intermediate
  • TypeScriptintermediate
  • Visual Studiointermediate
  • GitLabintermediate
  • Graph representation and transformationintermediate
  • Digital logic emulationintermediate
  • Object-oriented re-architectureintermediate
  • File parsing and generationintermediate
  • Optimization frameworksintermediate

Required Qualifications

  • Bachelor's degree plus 11 years of relevant software development experience or equivalent (experience)
  • Active TS/SCI with Polygraph clearance (experience)
  • Enterprise Java application development proficiency (experience)
  • Experience with software architecture review, automated testing, debugging, and version control (experience)

Responsibilities

  • Perform end-to-end capability development from research concept to deployment for cryptanalytic tools
  • Develop innovative software prototypes and algorithms for cryptanalytic engineering and analysis
  • Lead development on existing tool base, including new feature implementation and maintenance
  • Conduct software and architecture reviews, transition planning, and release management
  • Collaborate with mission stakeholders, researchers, and end users to meet operational needs

Benefits

  • general: Paid Time Off
  • general: 11 paid Holidays
  • general: 401K with 6% company match and immediate vesting
  • general: Flexible Schedules
  • general: Discounted Stock Purchase Plans
  • general: Technical Upskilling
  • general: Education and Training Support
  • general: Parental Paid Leave

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Leidos logo

Senior Software Tool Developer (SWE-3) - Careers at Leidos

Leidos

Senior Software Tool Developer (SWE-3) - Careers at Leidos

full-timePosted: Feb 3, 2026

Job Description

Senior Software Tool Developer (SWE-3) at Leidos

Leidos is seeking a Senior Software Tool Developer (SWE-3) to join our cutting-edge team in the Intel Sector, based in Annapolis Junction, MD. This role is pivotal in delivering mission-critical solutions for Security Engineering, Computer Network Operations (CNO), Mission Software, SIGINT, and Cryptographic Key Management. Be part of a fast-paced environment driving rapid prototyping, new development, and advanced technology research to push the boundaries of intelligence analysis.

Key Responsibilities

  • Drive end-to-end capability development, transforming research concepts, software prototypes, and algorithms into deployable tools for cryptanalytic engineering and analysis.
  • Leverage expertise in enterprise Java to enhance existing tools, incorporating new parameters, performing architecture reviews, and managing releases, testing, debugging, and user support.
  • Collaborate closely with mission stakeholders, researchers, and end users to create innovative, daily-use tools that elevate cryptanalytic tradecraft.

Required Qualifications

  • Bachelor's degree with 11+ years of software development experience or equivalent.
  • Proficiency in JAVA, Python, Rust, C++, TypeScript, Visual Studio, and GitLab.
  • Active TS/SCI with Polygraph clearance.

Desirable Skills

  • Graph representation and transformation to alternative structures.
  • Digital logic emulation and object-oriented re-architecture.
  • File parsing, generation, and optimization frameworks.

Why Leidos?

Join a team that outthinks, outbuilds, and outpaces the status quo. Enjoy competitive benefits including PTO, 11 paid holidays, 401K with 6% match, flexible schedules, education support, and more. Make a real impact on national security in a collaborative, prototype-driven program. Learn more about our LOE program.

Pay Range: $107,900 - $195,050 USD annually. Apply today to disrupt and innovate!

Locations

  • Annapolis Junction, Maryland, United States

Salary

107,900 - 195,050 USD / yearly

Estimated Salary Rangehigh confidence

107,900 - 195,050 USD / yearly

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • Javaintermediate
  • Pythonintermediate
  • Rustintermediate
  • C++intermediate
  • TypeScriptintermediate
  • Visual Studiointermediate
  • GitLabintermediate
  • Graph representation and transformationintermediate
  • Digital logic emulationintermediate
  • Object-oriented re-architectureintermediate
  • File parsing and generationintermediate
  • Optimization frameworksintermediate

Required Qualifications

  • Bachelor's degree plus 11 years of relevant software development experience or equivalent (experience)
  • Active TS/SCI with Polygraph clearance (experience)
  • Enterprise Java application development proficiency (experience)
  • Experience with software architecture review, automated testing, debugging, and version control (experience)

Responsibilities

  • Perform end-to-end capability development from research concept to deployment for cryptanalytic tools
  • Develop innovative software prototypes and algorithms for cryptanalytic engineering and analysis
  • Lead development on existing tool base, including new feature implementation and maintenance
  • Conduct software and architecture reviews, transition planning, and release management
  • Collaborate with mission stakeholders, researchers, and end users to meet operational needs

Benefits

  • general: Paid Time Off
  • general: 11 paid Holidays
  • general: 401K with 6% company match and immediate vesting
  • general: Flexible Schedules
  • general: Discounted Stock Purchase Plans
  • general: Technical Upskilling
  • general: Education and Training Support
  • general: Parental Paid Leave

Target Your Resume for "Senior Software Tool Developer (SWE-3) - Careers at Leidos" , Leidos

Get personalized recommendations to optimize your resume specifically for Senior Software Tool Developer (SWE-3) - Careers at Leidos. Takes only 15 seconds!

AI-powered keyword optimization
Skills matching & gap analysis
Experience alignment suggestions

Check Your ATS Score for "Senior Software Tool Developer (SWE-3) - Careers at Leidos" , Leidos

Find out how well your resume matches this job's requirements. Get comprehensive analysis including ATS compatibility, keyword matching, skill gaps, and personalized recommendations.

ATS compatibility check
Keyword optimization analysis
Skill matching & gap identification
Format & readability score

Tags & Categories

Jobs in Annapolis Junction MDLeidos CareersDefense IT JobsSIGINT Software EngineeringHiring in United StatesEngineeringInformation TechnologySecurity

Answer 10 quick questions to check your fit for Senior Software Tool Developer (SWE-3) - Careers at Leidos @ Leidos.

Quiz Challenge
10 Questions
~2 Minutes
Instant Score

Related Books and Jobs

No related jobs found at the moment.