Top Principal Software Engineer Jobs in Denver & Boulder, CO

Lead design, development, and testing of complex software systems for space/defense applications. Architect solutions, write and review code, manage version control, troubleshoot issues, document processes, mentor and lead engineering teams, drive technical strategy and adoption of new technologies, and communicate with non-technical stakeholders while ensuring project performance and schedule.

Provide technical leadership for cross-functional teams, create and communicate technical vision and strategy, lead new initiatives without defined procedures, remove roadblocks, resolve issues, mentor engineers, and perform related duties. Remote role based in Canada; GM does not provide immigration sponsorship.

Own cross-team, platform-level engineering initiatives end-to-end: architecture, migrations, observability, on-call, and customer outcomes. Drive AI-native tooling and agentic AI adoption, mentor senior engineers, and set technical standards across teams.

Lead design and implementation of scalable, cloud-native Java data platforms. Mentor teams, optimize data pipelines and canonical models, drive architecture and quality, collaborate with product and customers, and ensure high-performance, secure enterprise solutions.

Build and maintain a TypeScript/JavaScript SDK for IP video playback across web, smart TVs, and set-top boxes. Design clean APIs, implement video playback components (MSE/EME/DRM), optimize reliability and performance, collaborate with cross-functional teams, and support operations to ensure high-quality streaming for millions of users.

This role involves leading technical projects across multiple teams, designing scalable systems, collaborating with cross-functional teams, and mentoring engineers, focusing on payroll and tax systems at Gusto.

As a Senior Principal Engineer, you'll define and drive the technical strategy for customer experience platforms, lead architectural decisions, and mentor engineering teams to enhance customer and agent experiences.

Lead design, build, deployment, and operation of highly resilient, high-throughput configuration and publishing systems. Define long-term architecture and strategy, mentor senior engineers, diagnose and fix performance bottlenecks, and leverage AI tools to improve engineering productivity and platform capabilities.

Lead design and build of scalable backend systems and data platforms; own architecture and production deployments; improve reliability, performance, and observability; mentor engineers and collaborate with Product, Data Science, SRE, and Security.

Lead architecture and technical direction for an AI-first SaaS product (Growth Studio). Define scalable services, APIs, data flows, and AI-enabled workflows; guide integrations, run architecture/code reviews and POCs; mentor engineers; produce technical documentation; and partner with product, UX, QA, and ops to deliver reliable, secure, and maintainable platform capabilities for GovCon customers.

Lead long-term technical strategy and execution across multiple teams, architecting and evolving foundational frontend/backend systems and platforms at massive scale. Drive AI/ML adoption, solve ambiguous, high-impact problems, remain hands-on in critical system design and implementation, and align senior leaders on roadmaps and engineering standards.

Lead architecture, design, and delivery of PET product features; write production full‑stack code; champion testing, observability, CI/CD and operational readiness; mentor engineers and collaborate with product to shape technical roadmap.

Design and develop software applications for space systems, providing technical leadership and mentoring while ensuring high availability and security practices.

The Principal Software Engineer designs, develops, and tests software for space systems. Responsibilities include coding, technical leadership, system architecture, and mentoring, while adhering to best practices and software development methodologies.

Designs and implements embedded satellite command-and-control, mission planning, and data analysis software. Performs full software lifecycle tasks—requirements, architecture, design, coding, testing, integration, documentation, and support—while working on-site and collaborating across business and technical teams.

Design, implement, test, and integrate embedded satellite command/control, mission planning, and data analysis software. Perform full software lifecycle activities (requirements, architecture, coding, testing, integration, documentation) and maintain cross-team relationships while supporting program portfolios and on-site operations.

Lead development of embedded satellite command-and-control, mission planning, and data analysis software. Perform full software lifecycle (requirements, architecture, design, coding, testing, integration, documentation, support), maintain CI/CD and containerized/cloud services, produce UML designs, and collaborate across engineering and business units to deliver high-quality, testable systems.

Lead architecture, modernization, and development of Group Insurance applications. Modernize mainframe monoliths into Java microservices and micro-frontends on cloud, mentor distributed Agile teams, collaborate with enterprise architecture, product owners and infrastructure, and enable test automation and integrations. Approximately 10% domestic travel.

Design, develop, test, integrate, and support embedded satellite command-and-control, mission planning, and data analysis software. Perform full software lifecycle activities, maintain CI/CD and containerized infrastructures, generate UML artifacts, follow formal development practices, and collaborate across engineering and business units. On-site presence required.

Develop and maintain embedded satellite command-and-control, mission planning, and data analysis software. Perform full software lifecycle tasks (requirements, architecture, design, code, test, integration, documentation) and collaborate across engineering and business units. Support CI/CD, containerization, and associated test infrastructure.

Design, implement, test, and integrate embedded satellite command-and-control, mission planning, and data analysis software. Perform full software life-cycle activities, create UML models, follow formal development practices, and maintain on-site presence while collaborating across teams and supporting program test infrastructure.

Develop and maintain embedded satellite command-and-control, mission planning, and data analysis software. Perform full software lifecycle tasks (requirements, architecture, design, code, test, integration, documentation). Build and support test infrastructure, CI/CD and containerized deployments. Work onsite regularly and collaborate across engineering and program teams. Requires active TS/SCI clearance and experience with modern cloud, embedded, and software engineering practices.

Designs and implements embedded satellite command-and-control, mission planning, and data analysis software. Performs full software lifecycle activities (requirements, architecture, design, coding, testing, integration, documentation, support) and maintains on-site engagement. Works across programs using CI/CD, containerization, cloud, and modern web/back-end/front-end technologies.

Develop, test, and maintain embedded software for satellite, airborne, and ground systems. Perform full software lifecycle activities (requirements, architecture, design, code, test, integration, documentation). Support test infrastructure, CI/CD, containerized deployments, and collaborate across engineering teams while working on-site.

Design, develop, test, and maintain embedded satellite command & control, mission planning, and data analysis software. Perform full software lifecycle work (requirements, architecture, code, integration, test, documentation), collaborate across teams, and support on-site development and deployment activities.