Senior Software Engineer

RTX

. Develop full-stack web-based applications .

Posted 10/8/2026full-timeAurora • Colorado • United StatesSenior💰 $86,800 - $165,200 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in full-stack web application development, including modernizing legacy systems into microservices. Proficient in troubleshooting, maintaining, and documenting software applications while ensuring compliance with security clearance requirements.

Highest-signal resume keywords

Full-Stack Web DevelopmentJava ProgrammingPython ProgrammingActive TS/SCI Security ClearanceExperience with React or Angular

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software DevelopmentSoftware IntegrationMicroservices ArchitectureSystem TroubleshootingTesting and IntegrationConfiguration ManagementReal-Time Software ApplicationsSQLLinux/UnixC++ Programming

Tools & Technologies

GitJIRAGitLabConfluence

Certifications & Qualifications

Bachelor’s Degree in STEMActive TS/SCI with CI Poly Security Clearance

Industry Keywords

Operations and Maintenance ContractEnd-to-End System AnalysisHigh-Level Architecture DecisionsTechnology Stack Determination

Tech Stack

Tools & technologies

AngularJavaLinuxPythonReactSQLTypeScriptUnixC++

About the role

Key responsibilities & impact

Develop full-stack web-based applications
Modernize legacy software into modern microservice and web-based applications
Troubleshoot, maintain, and document software applications
Troubleshoot and isolate sources of system errors or unexpected performance
Perform testing, integration, and delivery of new software baselines
Perform in-depth analysis and assessment with an end-to-end perspective of complex systems in operations

Requirements

What you’ll need

Bachelor’s degree in Science, Technology, Engineering, or Mathematics typically required, or equivalent experience
Minimum of 5 years of prior engineering experience or equivalent experience
Experience coding software in Java, Python, or C++
Experience in software development and/or software integration
Active and transferable TS/SCI with CI Poly U.S. government-issued security clearance required prior to start date
U.S. citizenship required
Full-stack experience with React or Angular preferred
Experience making high-level architecture decisions and determining appropriate technology stacks preferred
Experience in a structured configuration-controlled environment, primarily supporting and maintaining real-time software applications on an Operations and Maintenance contract preferred
Experience with Linux/Unix, Git, and SQL preferred
Experience with JIRA, GitLab, and Confluence preferred

Benefits

Comp & perks

Relocation assistance available
Medical insurance
Dental insurance
Vision insurance
Life insurance
Short-term disability
Long-term disability
401(k) match
Flexible spending accounts
Flexible work schedules
Employee assistance program
Employee Scholar Program
Parental leave
Paid time off
Holidays
Annual short-term and/or long-term incentive compensation programs may be available