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105 assistant engineer jobs at 74 companies in Thornton, CO

2mo
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Assistant Engineer
Denver, Colorado, United States
$32-$42/hr OnsiteFull Time
Wood Rodgers
Wood Rodgers: Provides multidisciplinary engineering, planning, and surveying services for infrastructure.
0+ YOEBachelor's in civil engineering required; 0–5 years experience; EIT or ability to obtain within 6 months; proficiency with AutoCAD, Civil3D, and Microsoft Office; strong written and verbal communication.
AutoCAD, Civil3D, Microsoft Office
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1w
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Assistant Distribution Engineer- Distribution Modernization (Denver)
Denver, Colorado, United States
$80k-$115k/yr OnsiteFull Time
Burns & McDonnell
Burns & McDonnell: Engineering, architecture, and construction services for global infrastructure.
ABET-accredited bachelor's in engineering required, FE or EIT preferred, 3.0 GPA preferred, internship/consulting experience preferred, basic distribution knowledge, Microsoft Office proficiency, strong communication and analytical skills, legally authorized to work.
Microsoft Office
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1w
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Assistant Distribution Engineer- Distribution Modernization (Denver)
Denver, Colorado, United States
$80k-$115k/yr OnsiteFull Time
Burns & McDonnell
Burns & McDonnell: Engineering, construction, and architectural firm for critical infrastructure.
Bachelor's degree in engineering or related field from an ABET-accredited program; strong analytical, communication, teamwork, and computer skills. Permanent work authorization required.
Microsoft Office Suite
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1w
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Assistant Chief Engineer
Loveland, Colorado, United States
$60k-$67k/yr OnsiteFull Time
Atrium Hospitality
Atrium Hospitality: Operates and manages a portfolio of branded hotels and resorts.
2+ YOE2+ years hands-on engineering experience, basic computer skills, ability to lift 50 lbs and stand for long periods, flexible to work early mornings/evenings/weekends/holidays; HVAC certification and hotel experience preferred.
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3w
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Assistant Chief Engineer
Denver, Colorado, United States
$74k-$97k/yr OnsiteFull Time
Marriott International
Marriott InternationalNASDAQ: MAR: Operates and franchises a global network of hotels and resorts.
4+ YOEHigh school or 2-year degree plus technical HVAC-R/electrical/plumbing training; minimum 4 years engineering/maintenance experience (or 2 years with associate degree); supervisory experience; budgeting and preventative maintenance skills.
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Mechanical Engineer
Aurora, Colorado, United States
$120k-$135k/yr OnsiteFull Time
Delta Solutions & Strategies
Delta Solutions & Strategies: Provides technical consulting and engineering services to the military.
Bachelor's in mechanical engineering; registered PE in Colorado; TS/SCI required or actively seeking (Secret already attained); experience with O&M of HVAC, plumbing, and utility systems; ability to lift up to 100 lbs with assistance.
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Senior Integration Engineer
New York or Denver or United States or Europe
$125k-$160k/yr HybridFull Time
Gen II Fund Services
Gen II Fund Services: Provides fund administration services to private capital asset managers
5+ YOE5+ years integration engineering; deep Azure Function Apps, Logic Apps Standard, Azure Service Bus, and API/Service Bus configuration; strong C#; CI/CD, IaC (Bicep), Snowflake desirable; active use of AI-assisted development; bachelor's degree required.
Azure Function Apps, Logic Apps Standard, Azure API Management, APIM, Azure Service Bus, Bicep, C#, Snowflake, LLMs, codegen, Claude, CI/CD, IaC, WDL
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Engineering Developer
Lone Tree, Colorado, United States
OnsiteFull Time
Aircraft Performance Group
Aircraft Performance Group: Develops flight operations software for performance analysis and planning.
3+ YOE3+ years software development experience; strong C#/.NET and Windows desktop (WinForms); experience with 2D graphics, geospatial math, AI-assisted development, and aviation domain knowledge.
C#, .NET, WinForms, PHP, Swift, GDI+, SVG, SkiaSharp, Anthropic Claude, Claude Code, GitHub Copilot, Git, CI/CD, Ollama, llama.cpp, LM Studio
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Entry-Level Geotechnical Engineer
Denver, Colorado, United States
$68k-$89k/yr OnsiteFull Time
Langan
Langan: Provides integrated engineering, environmental, and site development consulting services.
Plan and execute field investigations, monitor foundation and earthwork construction, analyze geotechnical problems, and assist in preparing geotechnical reports.
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QA/UAT Engineer
Toronto or Vancouver or San Francisco or Denver or New York City
$100k-$150k/yr RemoteFull Time
Nylas
Nylas: Provides APIs for email and calendar integration.
3+ YOE3+ years QA/SDET experience; strong test automation, API and browser testing, Go familiarity, CI/CD and cloud-native tooling, and experience with AI-assisted testing tools.
Go (Golang), gRPC, REST, Playwright, Cypress, Selenium, Claude Code, Codex, Cursor, Postman, grpcurl, k6, Docker, Kubernetes, GitHub Actions, kubectl, GitOps, TypeScript, Python
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Network Engineer, Foundation & Support
Denver or Reston or Menlo Park
$162k-$227k/yr OnsiteFull Time
Meta
MetaNASDAQ: META: Develops social networking platforms and virtual reality technologies.
10+ YOE10+ years automation experience in large-scale networking, Linux and Python proficiency, knowledge of Optical/L2/L3, REST APIs, network devices, and experience leveraging AI-assisted tools; Bachelor's in CS or equivalent required.
Linux, REST APIs, Python, Claude, Copilot, Code generation models, C, C++, Go, Rust
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1w
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Assistant Chief Building Engineer
Denver, Colorado, United States
$95k-$105k/yr OnsiteFull Time
CBRE
CBRENYSE: CBRE: Provides global commercial real estate services and investment management.
5+ YOEHigh school diploma or equivalent with 5+ years related experience, Universal CFC required; certifications in HVAC, electrical, mechanical, refrigeration, process controls, plumbing, carpentry or engine repair preferred; ability to lift 50+ lbs.
Microsoft Word, Microsoft Excel, Microsoft Outlook
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2w
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Device Certification Engineer I
Littleton, Colorado, United States
$72k-$103k/yr OnsiteFull Time
EchoStar
EchoStarNasdaq: SATS: Global provider of satellite solutions and wireless communications services.
1+ YOE1-3 years mobile device testing experience; Bachelor's in EE/CS/Telecom; knowledge of 4G/5G/Wi-Fi/Bluetooth, iOS/Android/ADB, log analysis, AI-assisted tools, and strong written communication.
Android Debug Bridge (ADB), Jira, iOS, Android
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1mo
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Staff SSD Systems Design Engineer
Longmont, Colorado, United States
$146k-$247k/yr OnsiteFull Time
Micron Technology
Micron TechnologyNASDAQ: MU: Manufacturer of semiconductor memory and data storage products.
Bachelor's in EE/CompE/CS (or equivalent), strong knowledge of PCIe/NVMe and SSD architecture (FTL, NAND), experience with lab tools (oscilloscopes, analyzers), use of AI-assisted tools, and proficiency in Python/C++/Bash.
PCIe, NVMe, FTL, oscilloscopes, analyzers, debug platforms, AI Assisted tools, Python, C++, Bash, JIRA, Confluence, DFMEA
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Software Engineer
Denver, Colorado, United States
$115k-$135k/yr HybridFull Time
Litera
Litera: AI-powered document and workflow software for legal professionals.
3+ YOE3+ years professional software engineering experience; bachelor's degree in CS/Software Engineering or equivalent; experience with full‑stack web apps, APIs, source control, Agile, and AI-assisted development.
Azure, AWS, Google Cloud, CI/CD, containerization, AI-powered development tools, GenAI, Agile
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Mobile Engineer
Denver, Colorado, United States
$90k-$200k/yr HybridFull Time
Zero Homes
Zero Homes: Platform for planning and managing residential electrification and heat pump installations.
5+ YOE5+ years professional software engineering experience building native iOS (Swift/SwiftUI) and Android (Kotlin/Jetpack Compose) apps; experience with observability and product analytics (PostHog); familiarity with AI-assisted coding tools.
SwiftUI, Jetpack Compose, Swift, Kotlin, Claude Code, Cursor, Codex, PostHog, ARKit, ARCore
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2mo
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Quantitative Developer
Denver, Colorado, United States
$110k-$125k/yr HybridFull Time
Janus Henderson
Janus HendersonNYSE: JHG: Provides global asset management and investment advisory services.
Experience building enterprise-scale quantitative models and deploying them in production; strong SDLC knowledge; proficient with AI-assisted engineering and documentation.
AI tools
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1mo
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Assistant Inspector – Bridge Inspection
Denver or Tempe or Tucson or Boise or Las Vegas or Salt Lake City or South Jordan or Albuquerque or Meridian
$61k-$88k/yr OnsiteFull Time
WSP
WSPToronto Stock Exchange: WSP: Provides engineering, design, and environmental consultancy services globally.
0+ YOEBachelor's in civil/structural engineering, 0–1 years relevant experience, valid driver's license, comfort working outdoors/at heights, proficiency with Microsoft Office and digital data collection tools, strong documentation and analytical skills.
Microsoft Office, AASHTOWare BrM, Under Bridge Inspection Units (UBITs), drones, tablets
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Engineering Team Lead, Owned & Operated E-commerce
Denver or United States
$150k-$180k/yr RemoteFull Time
Havenly
Havenly: Online interior design and home furnishing retail platform.
Hands-on engineering experience with ecommerce platforms (Shopify Hydrogen/Liquid, Magento), full-stack systems experience, prior engineering leadership/mentoring, AI-assisted development experience, and strong prioritization and communication skills.
Claude Code, Codex, Cursor, Shopify Hydrogen, Shopify Liquid, Magento, Sanity CMS, React Router, TypeScript, Cloudflare, Oxygen, NetSuite, PHP, Node, Python, GraphQL, dbt, Airflow, Snowflake, AWS, Terraform, Docker
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2mo
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Senior Data Engineer
New York or Denver
$140k-$170k/yr HybridFull Time
Gen II Fund Services
Gen II Fund Services: Global fund administration for private capital asset managers.
5+ YOE5+ years data engineering experience with Snowflake and Python; experience building medallion (Bronze/Silver/Gold) architectures, Fivetran ingestion, Streamlit apps, BI enablement, and AI-assisted development.
Snowflake, Snowflake Streams, Snowflake Tasks, Snowflake Stored Procedures, Fivetran, Streamlit, Python, pytest, Microsoft Power BI, Qlik, Claude, LLMs, SQL
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