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45 software engineer front end developer jobs at 31 companies in Longmont, CO

2w
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Front End Software Developer
Sterling or Sarasota or Denver or Aurora
$82k-$172k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
5+ YOERequires 5+ years of front-end development, bachelor's degree, JavaScript/TypeScript, HTML/CSS, Git, REST APIs, Agile collaboration, TS/SCI with CI poly, and Security+ certification or willingness to obtain.
TypeScript, Java, Spring Boot, Spring Framework, REST, JavaScript, Vue 3, Bootstrap, Vite, Mockito, JUnit, Cypress, PostgreSQL, MySQL, Redis, AWS DynamoDB, AWS EC2, AWS RDS, Amazon S3, Amazon SNS, Amazon SQS, Git, Jira, Confluence, GitLab CI/CD, SonarQube, SAST, React, Angular, Docker, Kubernetes, GitLab, WebSockets
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2w
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Front End Software Developer
Sterling or Sarasota or Denver or Aurora
$82k-$172k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
5+ YOERequires 5+ years of front-end development, a bachelor's degree, JavaScript/TypeScript, HTML/CSS, Git, REST APIs, Agile collaboration, TS/SCI with CI poly, and Security+ certification or willingness to obtain it.
TypeScript, Java, Spring Boot, Spring Framework, REST, JavaScript, Vue 3, Bootstrap, Vite, Mockito, JUnit, Cypress, PostgreSQL, MySQL, Redis, AWS DynamoDB, Amazon Web Services, Amazon EC2, Amazon RDS, Amazon S3, Amazon SNS, Amazon SQS, Lambda, Git, Jira, Confluence, GitLab CI/CD, SonarQube, SAST, React, Angular, Vue.js, HTML, CSS, Docker, Kubernetes
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1mo
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Front End Software Engineer
Englewood or Denver
$140k-$180k/yr OnsiteFull Time
Altamira Technologies
Altamira TechnologiesNYSE: PSN: Provides data analytics and engineering for national security missions.
Bachelor's in a related field, TS/SCI clearance required, experience with Java/JavaScript/Python and front-end frameworks, strong communication and problem-solving skills.
Java, Python, JavaScript, Angular, React, ElasticSearch, TypeScript, ELK, Redis, Web Services (REST), Docker, LXC, Kubernetes, Helm, Machine Learning, Android, NoSQL, SQL, Xmidas, Digital Signal Processing, Svelte
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2mo
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Front End Software Engineer
San Francisco or Denver or New York City
$150k-$200k/yr OnsiteFull Time
Candid Health
Candid Health: Automates medical billing and revenue cycle management for healthcare providers.
3+ YOEBachelor's in CS or similar, 3+ years software engineering experience, proficiency with HTML, CSS, React, TypeScript and API development; familiarity with SSR, GraphQL, Tailwind, Firebase, and Codegen; strong UX instincts.
HTML, CSS, React, TypeScript, API, GraphQL, Tailwind, Firebase, Codegen
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2w
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Sr Software Engineer/Front-End Developer
Denver, Colorado, United States
$97k-$165k/yr OnsiteFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Provides advanced defense, aerospace, and security technology solutions.
4+ YOEBachelor's degree plus 4 years experience (or equivalent), US person required, Top Secret/SCI clearance required or obtainable, experience with modern front-end frameworks, RESTful APIs, Git, and agile methods.
HTML5, CSS3, LESS, SASS, Bourbon, Twitter Bootstrap, JavaScript, jQuery, Backbone.js, Ember.js, D3, Git, GitHub, Rails, Express, Django, Angular, React, Java, Kubernetes, Docker, Jenkins, Puppet
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2w
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Frontend Software Engineer - Senior (TS Clearance)
Denver, Colorado, United States
OnsiteFull Time
Solerity
Solerity: Provides IT and engineering services for federal government agencies.
Senior frontend engineering experience with modern web development, JavaScript, RESTful APIs, Git/GitHub, agile methods, and Angular or React; active Top Secret clearance required and TS/SCI with Poly eligibility.
HTML5, CSS3, LESS, SASS, Bourbon, Twitter Bootstrap, JavaScript, jQuery, Backbone.js, Ember.js, D3, RESTful APIs, Git, GitHub, Rails, Express, Django, Angular, React, Java, Kubernetes, Docker, Jenkins, Puppet, SAFe, Scrum, Lean
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1mo
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Frontend Engineer
Toulouse or San Francisco or Golden
OnsiteFull Time
Loft Orbital
Loft Orbital: Deploy and operate satellite missions for organizations and governments.
Proficiency in TypeScript, HTML, CSS, experience with Vue.js or React, SPA development, GraphQL APIs, and unit/integration testing (e.g., Vitest, Jest, Cypress). Web Components and geospatial libraries are a plus.
Vue.js, TypeScript, HTML, CSS, GraphQL, Vitest, Jest, Cypress, Web Components (Lit), Leaflet, Mapbox, CesiumJS
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Senior Software Engineer (Frontend) - Scribd Core
San Francisco or Ottawa or Phoenix or Toronto or Los Angeles or Denver or Salt Lake City or Atlanta or Chicago or Houston or Portland or New York City or Vancouver or San Diego or Washington, D.C. or Sacramento or Jacksonville or Seattle or Mexico City or Austin or Miami or Boston or Dallas
$124k-$226k/yr HybridFull Time
Scribd
Scribd: Subscription-based digital library for e-books, audiobooks, and documents.
6+ YOERequires 6+ years of frontend software engineering experience, JavaScript/TypeScript and React expertise, modern web framework experience, architecture knowledge, performance optimization, testing, and strong collaboration skills.
JavaScript, TypeScript, React, Next.js, Microfrontend, monorepos
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2w
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Software Engineer II – Portal (Front End)
Atlanta or Cincinnati or Denver or Salt Lake City or Cincinnati
$92k-$139k/yr HybridFull Time
Global Payments
Global PaymentsNYSE: GPN: Provides payment technology and software solutions for businesses.
5+ YOE5+ years software development, 3+ years Angular front-end development, 2+ years ExpressJS, relational databases, REST APIs, cloud services, SDLC, architecture, and strong communication skills.
AWS, Node.js, TypeScript, Angular, Playwright, MariaDB, AWS EC2, Amazon S3, Amazon API Gateway, Git, GitHub, CI, Jira, Confluence, Qualys, Jenkins, ExpressJS, Postgres, REST APIs, SDLC, Agile, CI/CD
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2mo
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Software Engineer II – Portal (Front End)
Atlanta or Denver or Cincinnati or Salt Lake City
$92k-$139k/yr HybridFull Time
Worldpay
Worldpay: Global payment processing and merchant technology solutions for businesses.
6+ YOE6+ years software development experience; 3+ years Angular front-end; 2+ years ExpressJS; experience with Node.js, TypeScript, relational databases, REST APIs and AWS; strong communication and SDLC knowledge.
Node.js, TypeScript, Angular, Playwright, MariaDB, AWS EC2, AWS S3, API Gateway, Git, GitHub, CI, JIRA, Confluence, Qualys, Jenkins, ExpressJS, Postgres, REST APIs
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2w
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Software Engineer – Frontend Web Developer
Littleton or Denver
$134k-$181k/yr OnsiteFull Time
Four Sea Group
Four Sea Group: Technical mission support and software engineering for aerospace.
4+ YOEBachelor’s degree or equivalent practical experience, 4+ years of software or frontend development, active Top Secret clearance, and experience with frontend applications, JavaScript, APIs, Git, Agile, and accessible interfaces.
HTML5, CSS3, LESS, SASS, Bootstrap, Bourbon, JavaScript, Angular, React, Git, GitHub, GitLab, Rails, Express, Django, RESTful APIs, Jenkins, Puppet, Docker, Kubernetes, D3, SAFe
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1mo
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Junior Front-End Developer
Westminster, Colorado, United States
$88k-$155k/yr OnsiteFull Time
Parsons
ParsonsNYSE: PSN: Provides engineering and technology services for infrastructure and defense.
2+ YOEBachelor's or equivalent, 2+ years related experience, working knowledge of Python and JavaScript, familiarity with PyQT/ReactJS/Dash/Streamlit, HTML/CSS, basic AI/ML concepts, and ability to work onsite in Denver.
Python, JavaScript, PyQT, ReactJS, Dash, Streamlit, HTML, CSS, Git, Azure Machine Learning, Roboflow
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3d
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UI/UX Front End Engineer
Boulder, Colorado, United States
$78k-$117k/yr RemoteFull Time, Contract
Lynker
Lynker: Science and technology solutions for government and environmental agencies.
5+ YOEBachelor's degree or equivalent experience, 5+ years of web development and UI/UX engineering, Drupal 10 theming, HTML5, CSS3/SASS, JavaScript, TypeScript, and Git experience.
Drupal 10, Twig, HTML5, CSS3/SASS, JavaScript, TypeScript, Flexbox, CSS Grid, Git, Leaflet, OpenLayers, Chart.js, D3.js, Docker, DDEV, Lando
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1w
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Sr Software Engineer - Denver, CO
Denver, Colorado, United States
$77k-$116k/yr HybridFull Time
Forged Fiber 37
Forged Fiber 37NYSE: T: Operator of open-access fiber broadband networks.
4+ YOERequires 4+ years of frontend development, strong Ember.js, JavaScript and TypeScript experience, automated testing, CI/CD, application architecture, troubleshooting, and a technical bachelor's degree or equivalent experience.
Ember.js, JavaScript, TypeScript, HTML5, CSS, Octane, Glimmer Components, Tracked Properties Services, Ember Data, CI/CD, Go, Node.js, Java, WCAG
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1d
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Staff Software Engineer
United States or Denver
$130k-$170k/yr RemoteFull Time
Ping Identity
Ping Identity: Provides identity and access management software for enterprise security.
10+ YOE10+ years of front-end development experience with React and JavaScript, strong HTML/CSS skills, scalable architecture, API integration, testing, CI/CD, and performance optimization; bachelor's or master's degree or equivalent experience.
React, HTML5, CSS3, JavaScript, Redux, Redux Toolkit, Jest, Vitest, React Testing Library, Enzyme, Playwright, Cypress, GitHub, GitLab, Vite, Kubernetes, Cassandra, Kafka, Redis, OAuth, OIDC, i18next, formatjs/react-intl, New Relic, LaunchDarkly, Sentry, Datadog RUM, OpenTelemetry, Next.js, Remix
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2d
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Software Engineer, Full Stack
Greenwood Village or Denver or United States or Singapore
$100k-$135k/yr HybridFull Time
CoBank
CoBank: Provides financial services to rural communities and agribusinesses.
2+ YOERequires 2 years of front-end/back-end development and Agile experience, plus 1 year with React, TypeScript, Node, and cloud platforms. Bachelor's degree preferred; AI/ML experience preferred.
React, HTML/CSS, Node.js, SQL, Python, Docker, Kubernetes, AWS, Windows PowerShell, Software Development Lifecycle (SDLC), CI/CD, Git, TypeScript, Microsoft Azure, Google Cloud, Amazon SageMaker, TensorFlow, Scikit-learn
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2w
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Sr Staff Fullstack Developer (Frontend focused)
Exton or Boulder or Huntsville or Dayton
$136k-$204k/yr OnsiteFull Time
Synopsys
SynopsysNasdaq: SNPS: Provides software and IP for semiconductor design and manufacturing.
4+ YOEBachelor's with 8 years, master's with 6, or PhD with 4; front-end and back-end development expertise, cloud deployment, web components, Git, Agile, and testing experience.
HTML5, CSS3, JavaScript, React, Angular, C#, Java, Python, Node.js, Docker, Kubernetes, AWS, Microsoft Azure, Git, Jasmine, Karma, Jest, Vitest, Ansys
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1mo
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Sr. Software Engineer - Full Stack - UI
Denver or Broomfield
$90k-$120k/yr HybridFull Time
Swisslog Healthcare
Swisslog Healthcare: Provides pharmacy and hospital transport automation solutions.
7+ YOEBachelor's or master's degree in computer science or equivalent experience; 7+ years software development, 4+ years front-end/UI development, full-stack delivery, Linux and Windows, problem-solving, and communication skills.
TypeScript, Angular, React, SignalR, Vue, CSS, Node.js, .NET Core, C#, Java, Spring Boot, REST, GraphQL, Kafka, RabbitMQ, OAuth2, OIDC, Entra ID, Azure, AWS, GCP, Docker, Kubernetes, GitHub Actions, Azure DevOps, Terraform, Bicep, Microsoft SQL Server, Web Components, Progressive Web Apps (PWA), Next.js, Angular Universal, OWASP, Linux, Windows
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4w
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Software Development Engineer - Workday Everywhere
Boulder, Colorado, United States
$130k-$196k/yr HybridFull Time
Workday
WorkdayNASDAQ: WDAY: Provides cloud-based software for financial and human capital management.
3+ YOE3+ years software engineering experience, full-stack (front-end and back-end), JavaScript/TypeScript proficiency, cloud (AWS/GCP/Azure), DevOps and IaC (CDK/Terraform), CI/CD experience, mentoring and AI integrations experience.
JavaScript, TypeScript, AWS, GCP, Azure, CDK, Terraform, Jenkins, GitHub Actions, REST, GraphQL, Datadog, CloudWatch, Grafana, Google Workspace, Salesforce, MCP, A2A, Workday XO, OMS/event flows, Slack, Microsoft Teams
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2mo
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Software Engineer I - Ground Software
Greenwood Village or Austin or Laurel
$70k-$125k/yr HybridFull Time
York Space Systems
York Space SystemsNYSE: YSS: Designs and manufactures modular spacecraft platforms and mission solutions.
0+ YOEEarly‑career full‑stack engineer; 0–1 years experience; bachelor's (or pursuing) in CS or related; foundational React/Angular knowledge; familiarity with TypeScript, C#, REST, Git, SQL, front-end tools; ability to obtain security clearance.
React, TypeScript, C#, .NET, Docker, Kafka, REST, Yarn, Babel, Material-UI, Git, SQL, TanStack Query
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