Senior Software Engineer SME - Mission-Critical, Secure

Leidos; Tucson (AZ); On-site; USD 131,000 - 237,000; Full time

Job summary

Leidos is seeking a Software Engineer SME to lead design, development, and deployment of mission-critical software for the Chinook program. You will mentor engineers, shape architecture, and ensure secure, scalable solutions across front-end and back-end systems.

The role requires hands-on leadership, strong cloud and DevSecOps practices, and collaboration with government stakeholders. Based in multiple locations including Tucson, AZ, you will contribute to pivotal national security initiatives.

Qualifications

• US citizenship is required per contract.

Responsibilities

• Serve as the senior technical SME and technical advisor for mission applications under the Chinook program.
• Design, develop, integrate, test, deploy, and maintain modern web applications and backend services.
• Develop scalable, secure software across front‑end and back‑end tiers.
• Translate mission and technical requirements into robust software architecture and implementation plans.
• Provide technical leadership in software design, architecture, coding standards, code reviews, and engineering best practices.
• Develop and maintain RESTful APIs, microservices, data services, and system integrations.
• Build responsive front‑end interfaces using modern web frameworks.
• Design and optimize database schemas, queries, data‑access layers, and data‑processing workflows.
• Troubleshoot complex application, integration, performance, and production issues.
• Support CI/CD and DevSecOps practices.
• Contribute to containerized and cloud‑enabled environments as applicable.
• Participate in Agile/Scrum ceremonies and technical working sessions.
• Mentor junior engineers and promote best practices.
• Identify opportunities to improve performance, reliability, security, and scalability.
• Evaluate emerging technologies for mission needs.

Skills

REST APIs

Python

Java

JavaScript

Go

React/Angular/Vue

AWS/GovCloud

Terraform/CloudFormation

Docker/Kubernetes

Git/Jenkins

Education

Bachelor's degree in Computer Science or related field

Tools

Git

CI/CD tools

Jira/Confluence

Job description

Leidos is seeking a Software Engineer SME to lead design, development, and deployment of mission-critical software for the Chinook program. You will mentor engineers, shape architecture, and ensure secure, scalable solutions across front-end and back-end systems.

The role requires hands-on leadership, strong cloud and DevSecOps practices, and collaboration with government stakeholders. Based in multiple locations including Tucson, AZ, you will contribute to pivotal national security initiatives.