Software Engineer III – Flight Software, Clearance Required

Sierra Space

. Design, develop, and test software applications for space systems and technologies .

Posted 10/28/2026full-timeCentennial • Colorado • United StatesMid-LevelSenior💰 $129,776 - $178,441 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and architecting complex software systems, with proficiency in multiple programming languages and methodologies such as Agile and Scrum. Provides technical leadership and mentorship while adhering to best practices in software development and maintaining security clearance requirements.

Highest-signal resume keywords

Software ArchitectureAgile MethodologiesPython ProgrammingU.S. Security ClearanceMentorship and Leadership

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software Development PrinciplesKernel-Level ProgrammingC++ ProgrammingJava ProgrammingBash ScriptingPowerShell ScriptingAnsibleDockerCI/CD PipelinesSoftware Design Patterns

Soft Skills

Problem-SolvingCollaborationTechnical Leadership

Tools & Technologies

GitJIRAConfluenceJenkinsGitHubGitLabBitbucketMySQLPostgreSQLMongoDB

Certifications & Qualifications

Active Top Secret ClearanceFull-Scope Polygraph Clearance

Industry Keywords

Space SystemsSoftware TestingNetwork ProtocolsSecurity PrinciplesStatic Analysis Tools

Tech Stack

Tools & technologies

AnsibleAWSAzureChefCloudDockerJavaJenkinsKubernetesMongoDBMySQLPostgresPuppetPythonC++

About the role

Key responsibilities & impact

Design, develop, and test software applications for space systems and technologies
Write clean, maintainable code adhering to best practices and coding standards
Architect and implement complex software systems
Collaborate with team members to understand project requirements
Utilize Git and version control systems to manage code changes
Participate in code reviews
Troubleshoot and resolve software-related issues
Document software configurations, processes, and procedures
Stay current with software development and space technology trends
Mentor and guide other engineers, providing technical leadership and support

Requirements

What you’ll need

Bachelor's degree in a related field, or equivalent work experience in lieu of degree, or master's plus 3 years of experience
Typically 5+ years of related experience
Expertise in one to multiple programming languages and advanced understanding of software development principles
Ability to design and architect complex software systems
Experience with Agile and Scrum/Kanban methodologies
Strong problem-solving skills
Ability to mentor and guide other engineers
Active Top Secret with SCI eligibility U.S. Security Clearance required
Current full-scope polygraph U.S. Security Clearance required
U.S. Citizenship required
Preferred: kernel-level programming; Python, C++, Java; Bash, PowerShell; Ansible, Puppet, Chef; JIRA, Confluence, Jenkins; GitHub, GitLab, Bitbucket; MySQL, PostgreSQL, MongoDB; AWS, Azure, Google Cloud; Docker; Kubernetes; network protocols and security principles; CI/CD pipelines and automated testing; software design patterns; SysML/UML; static analysis tools

Benefits

Comp & perks

Medical, dental, and vision plans
401(k) with 150% match up to 6%
Life insurance
3 weeks paid time off
Personal and professional development opportunities
Reasonable accommodations for applicants with disabilities