326 principal engineer jobs at 112 companies in Fraser, CO
5d
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Principal Engineer
London or Dagenham or Boston or East Providence or Denver or Cape Town
HybridFull Time
5+ YOEDeep technical leadership across complex ecommerce architecture, service and event contracts, data flows, reliability, migrations, peak-scale systems, cross-functional alignment, and AI-assisted development.
AI-assisted development, IMFG, Tulip, Backstage
1mo
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Principal Environmental Engineer
San Diego or Concord or Knoxville or Denver or Norfolk or Canton
$175k-$225k/yr RemoteFull Time
15+ YOEMaster's in Environmental Engineering, PE license, 15+ years environmental engineering experience (DoD/CERCLA), leadership experience on federal remediation projects, ability to travel, strong verbal and written communication.
3mo
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Principal Network Engineer
Denver, Colorado, United States
$160k-$180k/yr OnsiteFull Time
15+ YOE15+ years network engineering; 5+ years in service provider functions; routing/switching expertise; security tools experience; minimal travel; leads technical actions.
Cisco, Juniper, BGP, OSPF, EIGRP, Cisco ISE, Palo Alto
1w
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Principal BESS Engineer
Scottsdale or San Diego or San Francisco or Houston or Denver or Princeton
$140k-$195k/yr HybridFull Time
8+ YOERequires 8+ years in utility-scale BESS engineering, integration, development, and commissioning; knowledge of electrical, fire safety, interconnection, controls, and utility standards; Excel and Python skills.
Microsoft Excel, Python, TCP/IP, Modbus/TCP, Power Plant Controller, Energy Management Systems (EMS), Battery Management Systems (BMS), SCADA, UL, IEEE, National Electrical Code, NFPA, UL1973, UL9540/A
2w
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Principal Systems Engineer
Centennial or Louisville
$174k-$239k/yr OnsiteFull Time
15+ YOEBachelor's in related field, typically 15+ years' systems engineering experience, active Secret U.S. security clearance, expertise in requirements, architecture, integration, V&V, and mentoring.
DOORS, CAMEO EA, Rhapsody, Matlab, SysML, Open Mission Systems (OMS), Universal Command and Control Interface (UCI), CCSDS, DTN, TSPI
3mo
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Principal Engineer, Firmware
Longmont, Colorado, United States
$161k-$275k/yr OnsiteFull Time
7+ YOELead firmware architecture for SSDs; 7+ years embedded firmware; C/C++, Python; ASIC/FPGA bring-up; strong communication.
C, C++, Python
1w
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Manufacturing Principal Engineer – Optical
Boulder, Colorado, United States
$118k-$201k/yr OnsiteFull Time
6+ YOEBachelor's degree in engineering or related technical field plus 6 years of experience, or equivalent. Requires optical coating and thin film design experience, and eligibility for TS/SCI clearance.
Microsoft Office
1mo
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Associate Principal Engineer - Civil Engineering (Renewable Civil )
Lakewood, Colorado, United States
$100k-$175k/yr HybridFull Time
7+ YOEBachelor's in Civil Engineering, PE licensure, 7+ years engineering/field experience, proficiency with AutoCAD, MathCAD, SAP2000, PLS-CADD, AutoCAD Civil 3D and Microsoft Office; strong communication and leadership.
AutoCAD, MathCAD, SAP2000, PLS-CADD, AutoCAD Civil 3D, Microsoft Office Suite
3w
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Principal Engineer - Packaging Equipment
Omaha or Chicago or Denver
$109k-$159k/yr RemoteFull Time
7+ YOEBachelor's in Mechanical/Robotics/Packaging Engineering,7+ years food manufacturing packaging design,automation and project engineering experience,USDA/FDA-regulated environment experience,team leadership,automation/robotics expertise.
2mo
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Principal Mission Assurance Engineer
Westminster, Colorado, United States
$136k-$167k/yr OnsiteFull Time
8+ YOEBachelor's in engineering; 8+ years aerospace/DoD; mission assurance expertise; AS9100 experience preferred; strong communication and collaboration skills.
4d
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Engineer Principal – Systems – Space Vehicle
Boulder, Colorado, United States
$118k-$201k/yr OnsiteFull Time
6+ YOEBS or higher in engineering or a related technical field and 6+ years of related experience. Requires technical team leadership, space hardware program experience, communication skills, Microsoft Office proficiency, and U.S. citizenship.
Microsoft Office, Earned Value Management (EVM), Model-Based Systems Engineering
3mo
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Principal Engineer
Denver, Colorado, United States
$180k-$200k/yr HybridFull Time
10+ YOE10+ years in technical leadership; BA/BS in Computer Science; Ruby/Rails, TypeScript/React, Go, Python; AI-native workflow experience; agentic apps; scaling complex products.
Ruby, Rails, TypeScript, React, Go, Python, AI tooling
2mo
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Principal Analytics Engineer
United States or Denver
$165k-$240k/yr RemoteFull Time
12+ YOE12+ years in analytics engineering or data engineering with analytics partnership; expert SQL and Python; data governance tooling; cross-functional leadership.
SQL, Python, dbt, Snowflake, data governance tooling
1mo
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Principal / Sr Principal Algorithms Software Engineer
Boulder, Colorado, United States
$155k-$180k/yr OnsiteFull Time
5+ YOEActive in-scope U.S. Government Secret clearance required, ability to obtain TS/SCI, 5+ years relevant experience for principal roles (8+ for Sr Principal), Python and C++ development, Linux and command-line utilities, algorithm and state estimation experience, strong statistics and analysis skills, willingness to travel up to 10%.
Python, C++, Linux, grep, awk, cat, head
1mo
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Engineer Senior Principal II - Launch Systems - $10K Sign-On Bonus
Broomfield or Boulder
$150k-$254k/yr OnsiteFull Time
10+ YOEBS in engineering plus 10+ years experience (or advanced degree substitution), ability to obtain/maintain Top Secret/SCI polygraph, launch and mission systems integration experience, technical leadership, MBSE/JIRA/Linux familiarity.
MBSE, Linux, JIRA, EVM, CAM
3mo
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Principal Software Engineer
Denver, Colorado, United States
$190k-$245k/yr OnsiteFull Time
10+ YOEExpert-level C++ development; architect large-scale cross-platform systems; lead engineering initiatives; strong communication.
C++, Qt, REST, JSON, QML, QtWidgets, Git, CMake, QMake
3mo
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Principal Software Engineer
Boulder or New York City
$200k-$240k/yr HybridFull Time
10+ YOE10+ years software engineering; 5+ years adtech infrastructure; backend focus; experience with AI tooling; distributed systems; OpenRTB knowledge.
Java, Kafka, Redpanda, AWS, Databricks, Datadog, ONYX
3mo
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Principal Software Engineer
Denver, Colorado, United States
$225k-$270k/yr HybridFull Time
12+ YOEBachelor's in CS or equivalent; 12+ years software engineering; 5+ years in identity/security; hands-on leadership; strong Java; CIAM expertise.
Java, PostgreSQL, MySQL, OAuth, OpenID Connect, SAML, SCIM
3mo
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Principal Water Engineer (Denver, CO, US)
Denver or Lenexa or Lone Tree or Houston or Dallas or Fort Worth
$160k-$230k/yr HybridFull Time
15+ YOESenior-level water treatment process design leader with 15+ years in municipal/industrial water; PE preferred; travel up to 50%; proficient in process modeling software.
AFT Fathom, AFT Arrow, Biowin, GPS-X, HYSYS, Aspen Plus, WatPro, AqMB, SIMBA
2mo
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Senior Principal Engineer – Ground/Application Software
Broomfield or Westminster or Boulder or Colorado or United States
$133k-$226k/yr OnsiteFull Time
8+ YOEBS in engineering +8 years (or higher degree substitution), active Top Secret/SCI, experience in embedded/satellite software, CI/CD, containerization, cloud (AWS), C/C++, Python, UML, and formal software practices.
CI/CD, Containerization, C/C++, Rust, Python, Ruby, AWS, Lambda, Docker, Kubernetes, Spring, Jersey, Flask, CherryPy, Ruby on Rails, JavaScript, Angular, React, JavaFX, Qt, SQL, NoSQL, JPA/ORM, UML, Cameo, PlantUML, MATLAB, gtest, ctest, MQTT, AMQP, Kafka, Nginx, Apache, Postgres, DevSecOps
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