Senior Software Engineer - Mission-Critical, Secure, Agile

Koitecc Solutions; Gaithersburg (MD); On-site; USD 108,000 - 195,000; Full time

Job summary

Leidos in Gaithersburg, MD is seeking a Senior Software Developer to design, develop, test, and deploy secure, scalable applications for mission-critical operations within the Maru Program. You will collaborate with product owners, architects, DevSecOps, and stakeholders in an Agile environment.

This role requires Active Top Secret/SCI clearance with polygraph, US citizenship, and 8+ years of software development experience.

Qualifications

• US citizenship is required per contract.
• Bachelor's degree in Computer Science or related field with 8–12 years of experience or Master’s with 6–10 years.
• 8+ years of professional software development experience.
• Proficiency in one or more object‑oriented programming languages such as Java, C#, Python, or C++.
• Experience designing REST APIs and enterprise software solutions.
• Experience with 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.

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

Skills

Java

C#

Python

C++

Education

Bachelor's degree in Computer Science, Software Engineering, or related field

Master’s degree (preferred) with 6-10 years of experience

Tools

Git

Docker

Kubernetes

Job description

Leidos in Gaithersburg, MD is seeking a Senior Software Developer to design, develop, test, and deploy secure, scalable applications for mission-critical operations within the Maru Program. You will collaborate with product owners, architects, DevSecOps, and stakeholders in an Agile environment.

This role requires Active Top Secret/SCI clearance with polygraph, US citizenship, and 8+ years of software development experience.