Principal Software Engineer

RTX

. Architect and design full stack web-based applications .

Posted 10/8/2026full-timeAurora • Colorado • United StatesLead💰 $107,500 - $204,500 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in architecting and designing full stack web-based applications, with a strong focus on modernizing legacy software into microservices. Proficient in troubleshooting, maintenance, and documentation of software applications within a structured configuration-controlled environment.

Highest-signal resume keywords

Full-Stack DevelopmentJava ProgrammingPython ProgrammingActive TS/SCI Security ClearanceExperience with Linux/Unix

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software DevelopmentSoftware IntegrationMicroservices ArchitectureTesting and IntegrationSystem AnalysisSQLReact DevelopmentAngular DevelopmentTroubleshootingPerformance Analysis

Tools & Technologies

GITJIRAGitlabConfluence

Certifications & Qualifications

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

Industry Keywords

Configuration-Controlled EnvironmentOperations and Maintenance ContractReal-Time Software Applications

Tech Stack

Tools & technologies

AngularJavaLinuxPythonReactSQLTypeScriptUnixC++

About the role

Key responsibilities & impact

Architect and design full stack web-based applications
Help modernize legacy software into modern microservice and web-based applications
Support troubleshooting, maintenance, and documentation of 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

Typically requires a Bachelor’s degree in Science, Technology, Engineering, or Mathematics (STEM preferred) and a minimum of 8 years of prior engineering experience or equivalent experience
Experience with 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 developing a React or Angular based application
Experience making high-level architecture decisions and determining the appropriate tech stack
Experience working in a structured configuration-controlled environment supporting and maintaining real-time software applications on an Operations and Maintenance contract
Experience with Linux/Unix, GIT, and SQL
Experience with JIRA, Gitlab, and Confluence

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