Top Principal Engineer Jobs in Denver & Boulder, CO

Lead mission systems analysis and modeling to characterize performance of complex space/air/ground architectures. Develop tools and algorithms, produce analysis reports and presentations, support proposals, and collaborate with cross-functional teams to set system and component requirements.

Design, implement, and maintain software test capabilities for tactical systems. Perform full software lifecycle tasks—requirements, architecture, design, code, test, integration, documentation—and integrate test equipment and emulation infrastructure. Develop automated tests for embedded Linux, C/C++, Python and support containerized deployments. Collaborate across teams, maintain on-site presence, and support lab and production environments for mission-focused systems.

Design and architect enterprise microservice solutions, translate business requirements into detailed designs, lead and mentor engineering teams, oversee feature development and quality, integrate cloud and messaging platforms, and collaborate with architecture, product, and operations to deliver resilient, well-tested software.

Architect, design, and develop cloud-based, event-driven microservices and backend systems (Java/Spring) for video delivery and ad placement. Lead requirements, high/low-level design, prototypes, design reviews, and optimize deployments to AWS using Kafka, Kubernetes, Docker, Terraform, and CI/CD pipelines.

Lead SSD product development from design to manufacturing, ensuring customer success through project management, technical direction, and cross-functional collaboration.

Lead algorithm design and development for Youtopia’s precision nourishment platform, focusing on AI-driven solutions and mentoring engineers while ensuring scalability and performance.

Technical leader responsible for architecting and building high-performance POS payment integrations. Drive platform-level technical strategy, develop Kotlin/JVM services, integrate hardware SDKs and EMV card payments, ensure security/key management, observability, and API design, mentor engineers, and collaborate across teams to deliver scalable, mission-critical payment solutions.

The Principal Engineer, Propulsion Systems will oversee the technical integration and execution of propulsion systems for hypersonic vehicles, leading design, analysis, testing, and ensuring compliance in a fast-paced environment.

This role involves leading RF payload system design, managing supplier interactions, and advancing technologies in digital RF receivers for space applications.

As a Principal Engineer, you'll architect and implement security features for storage products, focusing on cryptography and cybersecurity across development lifecycles.

The role involves defining EMI compliance architecture, supporting hardware development, documenting test results, and leading program lifecycle activities related to space-related electronics.

The Principal Engineer will lead the engineering team in building systems across full stack, improving development efficiency, and expanding products in new markets.

The Principal Engineer will lead technical direction and execution for identity and engagement platforms, modernize systems, and mentor engineers, driving high-quality delivery and collaboration across teams.

Drive firmware architecture for SSD platforms, develop firmware tools, provide debug support, validate customer requirements, and collaborate across engineering teams.

Lead the development and integration of advanced GNC systems for spacecraft. The role involves designing algorithms, subsystem integration, and ensuring technical excellence across multiple aerospace projects.

Lead the development and integration of advanced GNC systems for spacecraft, ensuring technical excellence and reusable designs across multiple programs.

Lead a team of engineers in developing complex electronic systems for space applications, ensuring reliability and performance across project phases.

Lead the engineering architecture for an AI-driven product, focusing on system design, collaborating with AI agents, and ensuring quality and scalability in large-scale SaaS environments.

Lead the Space Vehicle Engineering team in developing, testing, and delivering space systems, ensuring technical performance and managing system engineering activities.

The Principal Electrical Engineer will lead system-level architecture for electrical designs, mentor engineers, drive engineering best practices, and ensure high-quality product delivery from concept to production.

As a Principal Software Engineer for the AAP team at Toast, you will design scalable systems, develop technical strategies, mentor engineers, and enhance data-driven initiatives.

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.

The Sr. Principal Software Engineer designs, develops, and tests software for space technologies, leading a team, making design decisions, and ensuring project success while complying with security requirements.

Lead mission architecture and systems engineering for OPIR space-based infrared sensor systems. Perform trade studies, define CONOPS and architectures, support capture and IRAD concepts, mentor teams, and integrate OPIR data into operational workflows and products. Engage with customers and deliver technical analyses and presentations.

Lead mission architecture, system trades, and CONOPS development for space-based OPIR systems. Drive architecture trade studies, MBSE, capture support, customer engagement, team leadership, and integration of OPIR data into operational workflows. Support new technology concepts, modeling/simulation, and delivery of technical analyses and presentations.