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2,429 junior developer jobs at 760 companies in Denver, CO

2mo
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Junior Software Developer
Westminster, Colorado, United States
RemoteFull Time
EnviroData Solutions
EnviroData Solutions: EHS software and consulting serving environmental, safety, and quality professionals.
Develop and maintain cloud-based EHS software using ASP.NET, C#, JavaScript, and SQL Server.
ASP.NET, C#, JavaScript, SQL Server
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3mo
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Junior Application Developer
Denver or Springfield or St. Louis or Sterling
$53k-$106k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provider of specialized IT and mission-critical government services.
0+ YOEBachelor's degree in computer science, software engineering, or related discipline; 0–3 years of software development experience; Java or Python experience; TS/SCI clearance with polygraph; web, database, and Agile knowledge.
Java, Python, Git, CI/CD, ArcGIS, GeoServer, OpenLayers, Cesium, Esri ArcGIS Pro, Esri ArcGIS Enterprise
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3w
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Junior Software Engineer
Englewood, Colorado, United States
$65k-$82k/yr HybridFull Time
Nagrastar, Llc: N/A
Experience with software, web service, or web application development; proficiency with Java and Spring framework; relational databases (MySQL, PostgreSQL); experience in at least one of Rust, Golang, JavaScript, TypeScript, C, C++.
Java, Spring, Rust, Golang, C++, QML, JavaScript, MySQL, PostgreSQL, TypeScript, C, Qt, MongoDB, AWS, Docker, Kubernetes, GitLab, Jenkins
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1mo
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Junior Business Applications Developer
Littleton, Colorado, United States
$56k-$75k/yr OnsiteFull Time
LONG Building Technologies
LONG Building Technologies: Privately held Western U.S. building integrator serving commercial and government facilities with HVAC, automation, security, and parts.
Bachelor's degree in computer science or related field; proficiency in at least one programming language; basic web development knowledge; familiarity with SQL/NoSQL databases; experience with Git; ability to gather requirements and communicate effectively.
Python, Java, JavaScript, C#, Ruby, HTML, CSS3, React, Angular, Vue.js, Node.js, Django, SQL, NoSQL, MySQL, PostgreSQL, MongoDB, Git, GitHub, GitLab, .NET, REST APIs, Microsoft Power Automate, Microsoft Power Apps, WordPress, Microsoft SharePoint Online, Microsoft Graph API, Azure, Smartware Studio
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2mo
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Junior Manufacturing Software Engineer
Boulder, Colorado, United States
$78k-$90k/yr OnsiteFull Time
Veolia Water Technologies
Veolia Water Technologies: Veolia Water Technologies is a Veolia subsidiary designing municipal and industrial drinking-water, wastewater, and sludge-treatment systems.
2+ YOEBachelor’s degree in software engineering, information technology, or related field; 2+ years programming experience, preferably in manufacturing; experience with MES, databases, software development tools, and troubleshooting.
Manufacturing Execution Systems (MES), VC++, C#, Java, Python, MySQL, Tableau, Microsoft Visual Studio, Visual Studio Code, Microsoft SQL Server, PostgreSQL, SAP, Git, GitHub, GitLab, Jira
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2w
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Junior Software Engineer
Boulder or Raleigh
$78k-$91k/yr HybridFull Time
Ascend Analytics
Ascend Analytics: Private energy software and consulting serving utilities, developers, investors, and other power-market participants.
BS in Engineering, Computer Science, Data/Information Science, Mathematics or related field; 3.0 GPA; demonstrated coding experience in Python, Ruby, .NET, Java, C++, C#, Kotlin, Rust, or JavaScript; strong programming background; teamwork and communication skills.
Python, SQL, SAS, C#, React, Ruby, .NET, Java, C++, Kotlin, Rust, JavaScript, SQL Server, Oracle, PostgreSQL
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1w
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Junior Software Engineer
Tucson or Gaithersburg or Alexandria or Chantilly or Englewood or St. Louis
$70k-$126k/yr OnsiteFull Time
Leidos
LeidosNew York Stock Exchange: LDOS: Public defense and technology contractor serving government and commercial customers with digital, health, infrastructure, and engineering solutions.
2+ YOEUS citizenship required; active Top Secret/SCI clearance with ability to pass polygraph; Bachelor's in CS/SE or related with 2-4 years experience or Master's with less than 2 years; experience with web, OOP, frameworks, cloud, databases, Git, CI/CD.
HTML, CSS, JSON, Ajax, REST APIs, Python, Java, JavaScript, React, Angular, Vue.js, jQuery, Spring Boot, Django, Node.js, Flask, Svelte, AWS, Azure, MySQL, PostgreSQL, SQL Server, Windows, Linux, Git, GitLab CI, Jenkins, JIRA, Confluence, Docker, Kubernetes, OpenSearch, Elasticsearch, IBM, Google, Oracle, S3, SQS, SNS, EC2, CloudFormation, RDS, GeoServer, PostGIS, OGC APIs, ESRI ArcGIS, Terraform, Ansible
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6h
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Data Engineer (junior career)
Palmdale or Littleton or Marietta or Fort Worth
$71k-$131k/yr OnsiteFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Global security and aerospace driving innovative defense solutions.
2+ YOEDegree in Computer Science or related field; 2-4 years data engineering experience; 1+ years AI/ML support; Python and SQL proficiency; Agile and Git; ability to obtain special program clearance; active U.S. Secret clearance.
Python, SQL, Git, SAP HANA, Neo4j, Eqube
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1mo
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Junior/Mid-Level IT Software Engineer - .NET/Web
Centennial or Lincoln or Brownsville or Boise or Madison
$90k-$130k/yr HybridFull Time
Nelnet
NelnetNew York Stock Exchange: NNI: Public diversified holding providing student-loan servicing, education technology, payment processing, government services, and consumer lending.
2+ YOEBachelor's degree or equivalent experience preferred; 2–5+ years of software development preferred. Requires C#/.NET, Angular, TypeScript/JavaScript, SQL, Git, testing, secure coding, agile delivery, and communication skills.
C#, .NET, TypeScript, JavaScript, Angular, SQL, SQL Server, Git, NIST
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3w
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Junior Software Test Automation Engineer
Greenwood Village or Austin
$100k-$128k/yr OnsiteFull Time
York Space Systems
York Space SystemsNYSE: YSS: U.S. space and defense prime building spacecraft and integrated mission solutions for national-security, government, and commercial customers.
0+ YOEBachelor's degree in Aerospace Engineering, Computer Science, Software Engineering, or related field; 0-2 years experience; proficiency in Python, Git, Linux, bash scripting; familiarity with CI/CD pipelines and test documentation; permanent U.S. work authorization.
Python, Git, Linux, bash, Docker, Docker Compose, Cypress, Playwright, Selenium, SQL, Influx, MongoDB, C#
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1mo
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Junior Mechanical Engineer
Huntsville or Denver
OnsiteFull Time
Performance Drone Works
Performance Drone Works: American defense technology mass-manufacturing aerial robotic systems and software for defense and public-safety customers.
0+ YOEBachelor's degree in mechanical engineering, 0–2 years of experience, SolidWorks or similar 3D CAD proficiency, hands-on hardware skills, and ability to obtain and maintain U.S. security clearance.
SolidWorks, SolidWorks PDM, 3D printing, CNC, GD&T, PPE
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1mo
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Mechanical Engineer: Junior & Senior Level Openings
Denver, Colorado, United States
$85k-$140k/yr OnsiteFull Time
Maybell Quantum Industries
Maybell Quantum Industries: Private U.S. quantum hardware manufacturer building dilution refrigerators for research institutions and commercial quantum developers.
2+ YOEBachelor's degree in mechanical or aerospace engineering; 2-3 years (junior) or 4-8 years (senior) mechanical design experience; proven track record of bringing concepts to reality.
Ansys, ASME Y14.5
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2mo
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Junior Structural (Buildings) Engineer
Denver or Seattle or Tacoma or Portland or Virginia Beach or United States
$79k-$109k/yr OnsiteFull Time
WSP
WSPTSX: WSP: Global engineering and professional services consulting firm.
1+ YOEMaster’s degree in structural or civil engineering, 1–3 years of relevant experience, structural codes knowledge, analytical skills, and familiarity with structural design software. Immediate U.S. work authorization required.
ETABS, SAP2000, RISA-3D, RAM Concept, SAFE, Revit, AutoCAD
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1w
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Software Engineer Sr.
Littleton, Colorado, United States
$110k-$205k/yr HybridFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Global security and aerospace driving innovative defense solutions.
Ability to obtain DoD Interim Secret clearance; working knowledge of C#, Java, or C++; network programming (TCP, UDP, IPC); object-oriented development; unit testing with GTest, JUnit, JMockit; leadership/mentoring of junior engineers.
Java, C#, C++, Python, SELinux, GitLab, Netbeans, VSCode, Jenkins, Atlassian Suite, CPPUnit, JUnit, JMockit, Eggplant, GTest, Perl, Bash, Fortify, Sonarqube
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3w
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Engineer, Development
Atlanta or Denver
HybridFull Time
KPMG US
KPMG US: Private U.S. professional-services partnership providing audit, tax, advisory, and consulting services to businesses and public-sector organizations.
1+ YOEMinimum one year of recent software development experience; high school diploma or GED required, bachelor's degree in computer science or related field preferred; experience with Python, .NET, C#, Angular, SQL, Azure, and ML frameworks preferred.
Angular, TypeScript, Python, .NET, C#, SQL, Azure, Azure OpenAI, PyTorch, TensorFlow, scikit-learn
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1mo
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ServiceNow Developer
Dallas or San Diego or Sacramento or Richmond or Raleigh-Durham or Phoenix or Pasadena or Orlando or Newport Beach or Nashville or Greenville or Denver or Tampa or Fort Lauderdale or Charlotte or Boston or Baltimore or Colorado Springs or Seattle or Austin or Atlanta
OnsiteFull Time
DPR Construction
DPR Construction: Self-performing general contractor for technically complex and sustainable building projects.
2+ YOERequires 2–4 years of full-stack development, software engineering, or related experience, with expertise in modern frameworks, APIs, databases, CI/CD, testing, and secure cloud-native solutions.
ServiceNow, RESTful, GraphQL, CI/CD
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Software Engineer Intern
Denver, Colorado, United States
$34/hr HybridFull Time, Internship
Ibotta
IbottaNYSE: IBTA: Public performance-marketing platform delivering digital promotions and cash-back rewards to brands and consumers.
Junior pursuing a bachelor's degree in computer science or related field, with programming exposure, testing and CI/CD knowledge, and familiarity with APIs, microservices, distributed architectures, databases, and AI tools.
Amazon Web Services (AWS), Python, Java, Ruby, JavaScript, TypeScript, CI/CD, REST APIs
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1d
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Application Engineer Intern
Denver, Colorado, United States
$25/hr HybridInternship
Janus Henderson
Janus Henderson: Private global asset manager helping institutional and individual clients invest across equities, fixed income, multi-asset and alternatives.
College sophomore or junior pursuing Bachelor's or higher in Computer Science or related; strong CS fundamentals, OOP, SQL, Git, DevOps; authorized to work in U.S.; full-time student at internship time.
Java, C#, Python, TypeScript, SQL, Git, GitHub Actions, Azure DevOps, GitHub Copilot, Docker, Azure, AWS, REST APIs
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3w
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Application Developer - Senior
Westminster, Colorado, United States
$97k-$165k/yr HybridFull Time
BAE Systems
BAE SystemsLSE: BA.: Global defense, aerospace, and security technology.
4+ YOEBachelor’s degree in computer science or related technical field and 4+ years of related experience, including 4+ years developing applications with Python. Requires Agile/Scrum, REST APIs, databases, testing, and software design expertise.
Python, Agile, Scrum, Web API REST, Microsoft SQL, Entity Framework, C#, .NET, CI/CD
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