Senior Software Engineer

Reposted 2 Days Ago
Be an Early Applicant
Gaithersburg, MD
In-Office
126K-228K Annually
Senior level
Information Technology • Software
The Role
Responsible for all phases of software development including design, coding, testing, and integration, while collaborating with multidisciplinary teams and documenting processes.
Summary Generated by Built In
Leidos is seeking Senior Software Engineers in Gaithersburg, MD for its Air Traffic Management projects to include Federal Aviation Administration and international clients. Successful candidates will be responsible with all phases of software development ranging from: design and coding to integrating and reviewing software components, from testing and bug fixing to documentation, building and presenting demos to stakeholders.

If this sounds like the kind of environment where you can thrive, keep reading!

Areas of Responsibility:

  • Analyze system requirements and create detailed software requirements specifications for implementation in various software development phases
  • Developing software in Java/J2EE in an agile environment
  • Conduct testing and validation of software components, including unit testing and integration testing, to ensure reliability and functionality
  • Participate in design reviews, code reviews, and other team activities to provide technical expertise and ensure alignment with project goals
  • Stay current with industry trends and advancements, contributing insights and recommendations for continuous improvement
  • Support troubleshooting efforts and provide technical assistance to resolve software-related issues during development and post-production phases
  • Document software designs, specifications, and test procedures to maintain comprehensive records and facilitate knowledge sharing within the team
  • Collaborate with multidisciplinary engineering teams to implement software solutions that meet system specifications and performance criteria

Required Qualifications:

  • Bachelor’s degree in Computer Engineering/Computer Science or Electronics & Electrical /Telecommunications Engineering with 10+ years experience OR a Master's degree in Computer Engineering/Computer Science or Electronics & Electrical /Telecommunications Engineering with 8+ years experience
  • Ability to obtain and maintain a public trust security clearance
  • U.S. Citizen
  • Object Oriented Programming
  • C and C++ programming languages
  • Real-Time Programming on High Availability Systems
  • Multi-threaded programming
  • Low Level Operating Systems (OS) Customization (RedHat), Hypervisors, and VMs
  • CAS / Hardware Integration
  • Low level communication software (TCP-IP, UDP, SCTP)
  • System Maintenance Concepts 

Preferred Qualifications:

  • Ada programming language
  • Knowledge of AI/ML tools and concepts in software development
  • Experience with the Federal Aviation Administration’s En-Route Automation Modernization (ERAM)
  • Knowledge of XML

At Leidos, we don’t want someone who "fits the mold"—we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, “what’s next?” before the dust settles on “what’s now.”

If you’re already scheming step 20 while everyone else is still debating step 2… good. You’ll fit right in.

Original Posting:September 19, 2025

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 $126,100.00 - $227,950.00

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.

Top Skills

Ai/Ml Tools
C
C++
Java/J2Ee
Low Level Operating Systems
Real-Time Programming
Sctp
Tcp-Ip
Udp
XML
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The Company
Alexandria, VA
27,104 Employees

What We Do

We Are Leidos

For 50 years we have been tackling some of the biggest problems that face our nation and our world.

OUR MISSION
Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020.

Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®.

Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos.

Your most important work is ahead.

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