Top Principal Engineer Jobs in Denver & Boulder, CO

Analyze and characterize electro-optical payload performance across radiometric, spatial, and spectral domains. Develop modeling and simulation methods, evaluate unresolved imagery, verify requirements, assess environmental impacts, support payload testing and design reviews, and collaborate with systems, hardware, algorithms, calibration, image processing, and mission operations teams.

Lead the mobile engineering team in evolving iOS and Android applications toward an AI-native, thin-client architecture. Define participant API and platform direction, contribute Python to backend services, establish AI-assisted development processes, improve DevOps and continuous delivery, mentor engineers, and partner closely with Product and Design. The role requires principal-level technical leadership, product focus, system architecture expertise, and hands-on use of AI coding agents.

Provides technical leadership on complex, high-impact engineering projects from design through launch. The role involves architecture, company-wide initiatives, engineering excellence, mentoring technical leaders, and establishing standards for scalable, reliable, secure, observable systems. The engineer will collaborate across teams, communicate complex technical topics, and apply customer-focused decision-making and A/B testing techniques.

Provides technical leadership for signal and power integrity across HPE storage platforms. Defines SI/PI strategies, PCB stackups, routing and validation standards; architects high-speed SerDes systems; leads simulations, laboratory correlation, root-cause investigations and cross-functional technical reviews. The role evaluates emerging technologies, mentors engineers, drives innovation through patents and publications, and serves as the final escalation point for complex SI/PI decisions.

Lead SSD hardware development across the product lifecycle: architecture, high-speed SI/PI analysis, PCB/schematic design, lab validation and debugging, manufacturing readiness, cross-functional integration, and mentorship. Apply AI-enabled tools to accelerate validation, automation, and debugging workflows.

The Principal Engineer will lead the design and delivery of core platform capabilities, focusing on scalable systems, AI application, and mentoring engineers while driving architectural decisions and improving operational systems.

Develop and maintain enterprise-scale DevOps solutions, CI/CD pipelines, Infrastructure as Code, and software-defined networking solutions for the C2BMC missile defense program. Build automation using Python and Java, troubleshoot build and cloud environments, improve deployment reliability, document technical systems, and track network enterprise KPIs. The role requires collaboration across engineering teams, occasional after-hours support, on-site work, travel, an active Secret clearance, and DoD 8140 IAT Level II certification.

Principal Engineer serving as the CTO’s technical deputy, leading day-to-day engineering execution, architecture, code reviews, developer support, and delivery. The role requires hands-on full-stack development across databases, backend, frontend, cloud infrastructure, and DevOps. It also champions AI-agent-assisted development by establishing workflows, guardrails, and quality standards. The engineer will mentor teammates, resolve technical blockers, improve reliability and documentation, and collaborate with technical, product, and research stakeholders.

Define Scribd’s technical vision for agentic engineering and establish architecture, patterns, and guardrails for AI-assisted software development. Lead internal developer tools, libraries, platforms, and engineering workflow improvements across codebases, CI/CD, and infrastructure. Partner with engineering leadership on ambiguous cross-organizational initiatives, mentor senior and staff engineers, and drive adoption of coding-agent capabilities throughout the organization.

Lead modernization of spacecraft command and control architecture across C&DH avionics, flight software, communications, ground systems, and mission control. Define roadmaps, interfaces, prototypes, trade studies, and implementation strategies using modern networking and distributed-system technologies while preserving legacy compatibility, reliability, cybersecurity, and mission performance. Provide technical leadership, coordinate stakeholders, and mentor engineering teams.

Lead system-level SSD architecture and design from concept to high-volume manufacturing. Resolve complex multi-domain issues (firmware, hardware, systems), define characterization strategies (power, thermal, performance, reliability), interface with executives and customers, drive continuous improvement, and mentor engineering teams.

Leads the development, analysis, integration, testing, and flight support of guidance, navigation, and control systems for space programs. Responsibilities include defining requirements, performing attitude, orbit, trajectory, agility, stability, and dynamics analyses, supporting hardware and software testing, documenting technical designs, and presenting results to technical and customer audiences. The role also contributes across the program lifecycle from proposals and concept development through procurement, integration, test, and on-orbit support.

Leads architecture, reliability, and automation for cloud network foundations across AWS, GCP, Azure, and internal infrastructure. Designs routing, segmentation, firewalls, connectivity, access, and infrastructure-as-code systems; establishes SLOs, monitoring, incident response, and recovery practices. Builds reusable automation, improves change safety, partners across platform, security, IT, and engineering teams, serves as a senior escalation point, creates operational standards, and mentors engineers.

Designs, simulates, tests, and documents RF passive and active circuits for phased-array antennas, receivers, transmitters, oscillators, and RF subsystems operating from VHF through 20 GHz. Leads RF hardware realization, testing, troubleshooting, and production readiness while mentoring engineers and technicians. The role also involves customer interaction, technical leadership, measurement analysis, circuit-board and chip-and-wire design, and coordination across internal and external facilities.

Lead software quality assurance for aerospace and defense mission ground systems across development, operations, maintenance, and sustainment. Perform baseline audits, release approvals, compliance assessments, verification and validation oversight, anomaly tracking, process improvement, and mission procedure reviews. Support customer and program reviews, Agile ceremonies, software assurance planning, configuration management, vulnerability identification, and lifecycle compliance. Mentor QA peers and coordinate with engineering, operations, mission assurance, configuration management, and program teams.

Leads software quality assurance for space mission ground systems throughout development, operations, maintenance, and sustainment. Responsibilities include release approvals, baseline audits, configuration management, verification and validation oversight, anomaly tracking, process compliance, mission procedure reviews, customer and program meetings, vulnerability identification, assurance planning, and mentoring QA personnel. The role supports aerospace and defense programs using Agile and Waterfall processes and requires coordination with engineering, operations, configuration management, and program leadership.

Leads software quality assurance for aerospace and defense mission systems across development, operations, maintenance, and sustainment. Responsibilities include software audits, release approvals, configuration management, verification and validation oversight, anomaly tracking, process compliance, mission procedure reviews, customer and program meetings, vulnerability identification, assurance planning, and mentoring QA peers. The role supports ground systems, payloads, spacecraft buses, simulators, and operational software while ensuring compliance with contractual, industry, and government standards.

Develops and maintains Ethernet network controller device drivers and supporting software for USB- and PCIe-based devices across Linux, Windows, QNX, VxWorks, and other embedded platforms. Responsibilities include driver design, integration, debugging, documentation, customer issue resolution, hardware bring-up, protocol analysis, and collaboration with global hardware, firmware, validation, and support teams.

Leads operational engineering and planning for spacecraft manufacturing, assembly, integration, and test programs. Responsibilities include production planning, design for manufacturing, electronics assembly process improvement, cost estimation, technical issue resolution, program coordination, and development of manufacturing processes. The role leads multidisciplinary efforts, supports design reviews and production documentation, mentors junior engineers, and works onsite across office, laboratory, production, and cleanroom environments.

Leads operational engineering and planning for spacecraft manufacturing, assembly, integration, and test programs. Responsibilities include production planning, design for manufacturing, electronics assembly problem resolution, process improvement, cost estimation, technical leadership, design reviews, and mentoring junior engineers. The role coordinates multidisciplinary efforts to meet cost, schedule, and technical objectives across concurrent production programs, with work performed primarily onsite in office, laboratory, production floor, and cleanroom environments.

Leads multidisciplinary operational engineering and planning for spacecraft manufacturing, assembly, integration, and test. Responsibilities include production planning, design reviews, build documentation, process development and improvement, issue resolution for electronics assemblies, cost estimation, technical proposal support, and mentoring junior engineers. The role requires coordinating concurrent production efforts, influencing program outcomes, and maintaining cost, schedule, and technical performance across complex programs.

Leads application definition and system enablement for precision analog, mixed-signal, and data-converter products. Responsibilities include defining device specifications, evaluating architecture trade-offs, testing new silicon, designing and bringing up evaluation hardware, developing application collateral and simulation models, resolving complex customer issues, delivering technical training, and mentoring applications engineers. Requires deep expertise in precision analog or ADC/DAC applications, bench evaluation, PCB bring-up, SPICE simulation, and cross-functional product development.

Designs, automates, deploys, monitors, and troubleshoots operational C2BMC network capabilities. Develops infrastructure-as-code and configuration management processes, resolves routing, switching, firewall, security, and availability issues, and collaborates with engineering, cybersecurity, and operations teams. Supports mission events, tests, exercises, deployments, and real-world operations, including occasional nights, weekends, and travel. Requires an active Top Secret clearance and IAT Level II or higher certification.

Develop and integrate radar signal-processing algorithms and mission capabilities. Translate system requirements into algorithm designs, perform radar performance and threat analyses, model mission scenarios, conduct simulations and trade studies, and support software integration. The engineer will work throughout the systems engineering lifecycle, assess operational effectiveness, influence system architecture, collaborate across integrated product teams, and provide technical leadership.

Leads the architecture, design, integration, testing, verification, and delivery of high-reliability space-based electronics boxes. Responsibilities include requirements flow-down, PWA and FPGA design oversight, component selection, test strategy, anomaly resolution, technical documentation, risk management, execution planning, stakeholder collaboration, and mentoring junior engineers. The role requires on-site work at least three days per week and may involve laboratory, production, cleanroom, and occasional travel environments.