Senior Software Engineer & SME — Mission-Critical Systems

Leidos; Alexandria (VA); On-site; USD 131,000 - 237,000; Full time

Job summary

Leidos is seeking a highly skilled Software Engineer SME to join the Chinook Program supporting the Intelligence Community. You will lead hands-on technical work across full SDLC, shape architecture, mentor engineers, and collaborate with government and contractor stakeholders to deliver secure, scalable software solutions that support critical national security objectives.

This role requires Top Secret/SCI clearance eligibility, a bachelor's/master’s in a related field, and extensive experience

Qualifications

• U.S. citizenship required by contract.
• Bachelor's degree in Computer Science, Software Engineering, or related field with 12–15 years of experience or Master’s with 10–13 years.
• Proficient with HTML, CSS, JSON, REST APIs; OO languages Python/Java/JavaScript; Go.
• Front-end/back-end frameworks: React, Angular, Vue.js, jQuery, Spring Boot, Django, Node.js, Flask, Svelte.
• Cloud: multi-cloud (AWS, IBM, Google, Azure, Oracle) and AWS services S3/SQS/SNS/EC2/CloudFormation/RDS.
• RDBMS: MySQL, PostgreSQL, SQL Server; NoSQL: OpenSearch/Elasticsearch; OS: Windows, Linux; Git.
• AWS GovCloud/C2S; containerized services via Docker/Kubernetes; DevSecOps with GitLab CI/CD, Jenkins, SonarQube, Nexus, Keycloak, Vault.
• Agile/Scrum tools (JIRA, Confluence); knowledge of GEOINT data types and NSG/OGC WMS/WFS.

Responsibilities

• Serve as senior technical SME and advisor for Chinook mission applications.
• Design, develop, integrate, test, deploy, and maintain modern web apps and backend services.
• Develop scalable, secure software across front-end and back-end tiers.
• Translate requirements into robust software architecture and implementation plans.
• Provide leadership in design, coding standards, reviews, and best practices.
• Develop and maintain RESTful APIs, microservices, and data services.
• Build responsive front-ends with modern web frameworks.
• Design/optimize database schemas and data-processing workflows.
• Troubleshoot complex production issues and support CI/CD/DevSecOps.

Skills

HTML/CSS/JSON/REST APIs

Python/Java/JavaScript

Go

React/Angular/Vue.js

AWS/Azure/Google/Oracle

Docker/Kubernetes

Terraform/CloudFormation

Git/JIRA/Confluence

OpenSearch/Elasticsearch

OGC GEOINT workflows

Education

Bachelor's degree in Computer Science/Software Engineering

Master’s degree in related field

Tools

Docker

Kubernetes

Terraform

CloudFormation

Git

JIRA

Job description

Leidos is seeking a highly skilled Software Engineer SME to join the Chinook Program supporting the Intelligence Community. You will lead hands-on technical work across full SDLC, shape architecture, mentor engineers, and collaborate with government and contractor stakeholders to deliver secure, scalable software solutions that support critical national security objectives.

This role requires Top Secret/SCI clearance eligibility, a bachelor's/master’s in a related field, and extensive experience