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407 mid level software engineer jobs at 210 companies in Thornton, CO

2mo
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Mid-Level Developer (TS/SCI with CI Poly Required)
Aurora, Colorado, United States
$75k-$95k/yr OnsiteFull Time
DeNOVO Solutions
DeNOVO Solutions: Provides defense and intelligence technology, software engineering, and cybersecurity services.
2+ YOETwo to five years of professional software development; TS/SCI with CI Polygraph; Go and API development; containers and CI/CD; mentoring junior developers.
Go, REST, Git, Docker, Kubernetes, Angular, Helm, Traefik, AWS, WebAssembly, wasmCloud, CI/CD
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3d
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Software Engineer - Cloud and Geospatial Data - Mid- Level
Denver, Colorado, United States
$90k-$190k/yr HybridFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
5+ YOEActive TS/SCI clearance, bachelor’s degree, 5+ years software engineering experience, strong Java and AWS skills, geospatial data processing experience, DevOps pipeline familiarity, and Linux/Python knowledge.
Java, AWS, Docker, Kubernetes, Helm, Postgres, GitLab CI/CD, Jenkins, Nexus, Apache Flink, Apache Spark, Apache Iceberg, Python, Linux, Red Hat
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1mo
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Mid-Level Structural Engineer
Billings or Denver or Boise or Hailey or Overland Park
$90k-$120k/yr OnsiteFull Time
WSP
WSPToronto Stock Exchange: WSP: Provides engineering, design, and environmental consultancy services globally.
3+ YOEBachelor's in Civil/Structural, 3–5 years structural engineering experience (substation preferred), EIT, knowledge of ACI/AISC/ASCE codes, structural analysis/finite element and software experience, technical writing, QA/QC, and strong communication.
RISA‑3D, STAAD Pro, MathCAD, LPile, RISA
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1d
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Jr. to Mid-level Software Engineer - Boulder, CO
Boulder, Colorado, United States
$110k-$138k/yr OnsiteFull Time
Davidson Technologies
Davidson Technologies: Delivers engineering and technology solutions for national security missions.
2+ YOEProficiency in C/C++, Python, Linux, and OOP; experience with algorithm development, state estimation, and data analysis; ability to travel up to 10%; active DoD Secret clearance required to start.
Linux, C, C++, Python, Java, Jira, Git, Conan, CMake, Nexus, Bash, grep, awk, cat, head, Confluence, Bitbucket
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Java Software Engineer Level 2 or 3
Aurora or Morrisville or Linthicum
$92k-$171k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
2+ YOERequires active Top Secret clearance with SCI eligibility, Bachelor's degree (level dependent) and 2+ to 5+ years software development experience, strong Java, RESTful APIs/microservices, Git, SQL/NoSQL, Agile experience.
Java, RESTful APIs, microservices, Git, GitHub, GitLab, Bitbucket, SQL, NoSQL, Linux
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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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3w
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Senior Software Engineer
Highlands Ranch or Houston
$93k-$186k/yr OnsiteFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
3+ YOEB.S. in engineering or related, 3+ years software engineering experience, proficiency in C++ and Python, Linux experience, full software lifecycle and debugging experience, real-time simulation and aerospace knowledge preferred.
C++, Python, MATLAB/Simulink, Linux, Perforce
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1w
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Software Engineer
Boulder, Colorado, United States
$120k-$155k/yr OnsiteFull Time
Major League Baseball
Major League Baseball: Professional sports league governing North American baseball teams and media.
3+ YOE3+ years professional software engineering experience; strong iOS development with Swift, UIKit/SwiftUI; mobile architecture, networking, state management, and collaboration in cross-functional teams.
iOS, Swift, UIKit, SwiftUI, tvOS, Apple TV, Android, Android TV, Fire TV
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2mo
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Software Engineer
Tucson or Centennial or Chantilly
$85k-$152k/yr OnsiteFull Time
Rincon Research Corporation
Rincon Research Corporation: Designs high-performance digital signal processing solutions for defense missions
Bachelor’s/Master’s/PhD in Computer Engineering or Computer Science; proficient in modern software practices; C++ and Python on Linux; ability to obtain TS/SCI clearance; US citizenship required.
C++, Python, Linux, Gitlab, CI/CD, Docker, Kubernetes, PIP
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3d
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Software Engineer
Aurora, Colorado, United States
$69k-$158k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients
3+ YOE3+ years software engineering experience, TS/SCI with polygraph required, Bachelor's in a STEM field, experience with cloud environments and building RESTful APIs, proficiency in Python/Java and modern web stacks.
Python, Java, Vue, Node, AWS, Azure, GCP, RESTful APIs, Linux, Docker, Kubernetes, C#, C, C++, JavaScript, React
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2w
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Software Engineer
Fort Collins, Colorado, United States
$120k-$200k/yr OnsiteFull Time
Toyon Research
Toyon Research: Develops advanced technology and analysis for national defense systems.
2+ YOEMS in engineering/computer science/physics/math or BS+2 years industry experience; experience with software architecture, team development, version control, and Docker; US citizenship and ability to qualify for DoD clearance.
Python, C++, Docker, Kubernetes, Reinforcement Learning (RL), Large Language Models (LLMs), Computer Vision
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2w
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Structural Engineer – Mid Level – Hydropower Focus (Hybrid)
Seattle or Salt Lake City or Denver or Minneapolis or Ann Arbor
$85k-$115k/yr HybridFull Time
Barr Engineering
Barr Engineering: Engineering and environmental consulting for industrial and natural resource projects.
4+ YOEBachelor's in structural or civil engineering, PE or eligibility, 4 years' relevant experience, valid driver's license, ability to travel and perform limited fieldwork, proficiency with AutoCAD/Revit and structural analysis software.
AutoCAD, Revit, RISA 3D, STAAD Pro, SAP
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1mo
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Software Engineer
Aurora, Colorado, United States
$69k-$158k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.
3+ YOE3+ years software engineering experience; proficiency with Python, Java, web stacks (Vue/Node), Agile, cloud (AWS/Azure/GCP), RESTful APIs; TS/SCI clearance with polygraph required; Bachelor’s degree in a STEM field.
Python, Java, Vue, Node, AWS, Azure, GCP, RESTful APIs, Linux, Docker, Kubernetes, C#, C, C++, JavaScript, React
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2mo
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Software Engineer Staff
Littleton, Colorado, United States
$150k-$180k/yr OnsiteFull Time
OASYS
OASYS: Provides technology services and products for government and defense.
Full-time software engineer with C/C++ experience; US citizen; ability to obtain Secret clearance; onsite in Littleton, CO.
C, C++, RTOS, GreenHill, VxWorks
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2d
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AI & ML Software Engineer
Fort Collins, Colorado, United States
$144k-$273k/yr HybridFull Time
Hewlett Packard Enterprise
Hewlett Packard EnterpriseNYSE: HPE: Providing global edge-to-cloud infrastructure and IT solutions for businesses.
Experience building production AI/ML software using Go, Python, and React; strong software engineering fundamentals; experience with distributed systems, observability, and lifecycle of ML solutions.
Go, Python, React, LLM, High Performance Computing (HPC)
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3d
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Flight Software Engineer
Denver or Denver
$115k-$165k/yr HybridFull Time
Bay Systems Consulting
Bay Systems Consulting: Provides engineering and technology support services to government agencies.
Bachelor's in CS/Aerospace/Software Engineering, software verification experience, leadership, advanced Python, Linux and MATLAB knowledge, strong analytical and problem-solving skills.
Python, Linux, MATLAB, C++, IBM DOORS
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2w
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Software Engineer II
Denver, Colorado, United States
$88k-$171k/yr OnsiteFull Time
Walmart
WalmartNYSE: WMT: Multinational retail operating discount stores and supermarkets.
3+ YOEBachelor's degree or 3 years software engineering experience; familiarity with C#/.NET, cloud-deployed microservices, SQL and messaging systems; strong communication and critical thinking.
C# 12, .NET 8, ASP.NET Core, Microsoft SQL Server, Aurora PostgreSQL, Mongo, MassTransit, RabbitMQ, Swagger/OpenAPI, RestSharp, xUnit, Moq, AWS
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3w
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Software Engineer 2
Earth City or Hopkins or Englewood
$98k-$116k/yr OnsiteFull Time
U.S. Bank
U.S. BankNYSE: USB: Provider of personal, business, and institutional financial services.
3+ YOE3+ years software engineering experience, bachelor’s degree or equivalent, strong SDLC/DevOps knowledge, mortgage domain experience preferred, strong communication and problem-solving skills.
Git, Jenkins, Azure DevOps, GitHub Actions, Terraform, Kubernetes, Docker
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2mo
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Software Engineer II
Lone Tree or Englewood
$94k-$130k/yr HybridFull Time
Sierra Nevada Corporation
Sierra Nevada Corporation: Develops mission-critical aerospace and national security technology systems.
2+ YOEBachelor's degree in Computer Science or Software Engineering; 2+ years of software development experience; ability to obtain/maintain Secret U.S. Security Clearance.
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3w
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Advanced Software Systems Engineer
Boulder, Colorado, United States
$119k-$128k/yr HybridFull Time
General Dynamics Mission Systems
General Dynamics Mission SystemsNYSE: GD: Engineers secure communication and mission-critical defense technology systems.
3+ YOEBachelor's in systems engineering (or related) with 5+ years or Master's with 3+ years, DoD Secret clearance required, U.S. citizenship, experience with systems-level software development, MBSE, cloud and DevOps tooling.
Model-Based Systems Engineering (MBSE), AWS, Azure, RHOSP, VIO, Kubernetes, Rancher, Docker, OpenShift, Ansible, Terraform, Terragrunt, Packer, STIG, RMF
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