What if the software you developed directly enabled some of the nation's most critical missions? As a Senior Software Developer, you'll do more than write exceptional code, you'll help build innovative, secure, and scalable solutions that support Intelligence Community operations. If you're passionate about modern software engineering, enjoy collaborating in Agile teams, and thrive on solving complex technical challenges, Leidos wants to hear from you.
On the Maru Program, you’ll join a high-performing team where your ideas are valued, your technical expertise is trusted, and your work has a tangible impact. Working alongside software engineers, architects, DevSecOps engineers, cybersecurity professionals, and mission stakeholders, you'll develop next-generation applications that deliver mission-critical capabilities in a fast-paced Agile environment.
This is your opportunity to build cutting-edge software while contributing to work that truly matters.
What You'll Do
As a Senior Software Developer, you'll play a key role in designing, developing, testing, and deploying secure, scalable applications that support enterprise and mission operations.
Please note Gaithersburg, MD is the program’s primary work location.
Clearance Level Required:Active Top Secret/SCI with the ability to successfully pass a Polygraph examination.
Primary Responsibilities:
- Design, develop, test, deploy, and maintain enterprise software applications using modern development practices.
- Collaborate with Product Owners, Scrum Masters, architects, and fellow developers to deliver high-quality software in Agile sprints.
- Participate in sprint planning, backlog refinement, daily stand-ups, sprint reviews, and retrospectives.
- Develop clean, maintainable, and well-documented code following secure coding standards and best practices.
- Design and implement RESTful APIs, microservices, and distributed application architectures.
- Perform code reviews and mentor junior developers to promote engineering excellence and knowledge sharing.
- Troubleshoot complex application issues and perform root cause analysis to improve system reliability and performance.
- Develop automated unit, integration, and end-to-end tests to ensure software quality.
- Collaborate with DevSecOps teams to implement CI/CD pipelines and automated deployment processes.
- Optimize application performance, scalability, and security across enterprise environments.
- Participate in architecture discussions and contribute to technical roadmaps and modernization initiatives.
- Support production deployments and resolve issues in mission-critical environments
Required Qualifications:
- US citizenship is required per contract.
- Bachelor's degree in Computer Science, Software Engineering, or related field and 8-12 years of prior relevant experience or Master’s with 6-10 years of prior relevant experience.
- 8+ years of professional software development experience.
- Strong proficiency in one or more object-oriented programming languages such as:
- Java
- C#
- Python
- C++
- Experience developing web-based applications and enterprise software solutions.
- Experience designing and consuming REST APIs.
- Experience working with relational and/or NoSQL databases.
- Strong understanding of object-oriented design principles and software design patterns.
- Experience using Git or other distributed version control systems.
- Experience working within Agile Scrum or SAFe development environments.
- Excellent analytical, debugging, and problem-solving skills.
- Strong written and verbal communication skills.
Preferred Qualifications:
- Experience developing cloud-native applications in AWS, Azure, or other cloud platforms.
- Experience with containerization technologies such as Docker and Kubernetes.
- Experience building microservices architectures.
- Familiarity with DevSecOps practices and CI/CD tools including Jenkins, GitLab CI, or Azure DevOps.
- Experience with Infrastructure as Code tools such as Terraform or Ansible.
- Knowledge of message brokers such as Kafka or RabbitMQ.
- Experience with front-end frameworks such as React, Angular, or Vue.js.
- Familiarity with Elasticsearch, Redis, or other enterprise technologies.
- Experience with secure software development lifecycle (SSDLC) practices.
- Security+ certification or other DoD 8570/8140 compliant certification.
#Maru
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:August 6, 2026For 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.
Skills Required
- US citizenship
- Active Top Secret/SCI clearance with ability to pass a polygraph
- Bachelor's degree in Computer Science, Software Engineering, or related field (or Master's with equivalent experience)
- 8+ years of professional software development experience
- Proficiency in object-oriented languages (Java, C#, Python, C++)
- Experience developing web-based and enterprise software solutions
- Experience designing and consuming RESTful APIs
- Experience with relational and/or NoSQL databases
- Strong understanding of object-oriented design principles and design patterns
- Experience using Git or other distributed version control systems
- Experience working within Agile Scrum or SAFe development environments
- Excellent analytical, debugging, and problem-solving skills
- Strong written and verbal communication skills
- Experience with cloud-native platforms (AWS, Azure) and containerization (Docker, Kubernetes)
- Experience building microservices architectures
- Familiarity with DevSecOps practices and CI/CD tools (Jenkins, GitLab CI, Azure DevOps)
- Experience with Infrastructure as Code (Terraform, Ansible)
- Knowledge of message brokers (Kafka, RabbitMQ)
- Experience with front-end frameworks (React, Angular, Vue.js)
- Familiarity with Elasticsearch, Redis, or other enterprise technologies
- Experience with secure software development lifecycle (SSDLC) practices
- Security+ or other DoD 8570/8140 compliant certification
Leidos Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.
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Healthcare Strength — Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
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Retirement Support — Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
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Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.
Leidos Insights
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.
