108 javascript react engineer jobs at 48 companies in Loveland, CO

3d
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Application Developer - JavaScript
Vienna or Charlotte or Louisville or Minneapolis or Olympia or Philadelphia or Redlands or San Antonio or St. Louis
$84k-$141k/yr OnsiteFull Time
Esri
Esri: Developing software for digital mapping and spatial data analysis.
2+ YOE2+ years developing web applications with JavaScript; TypeScript and web framework experience preferred. Bachelor's degree in CS/engineering/math/GIS. Familiarity with digital cartography, EM visualization, code management, and CI/CD.
JavaScript, TypeScript, ArcGIS Maps SDK for JavaScript, ArcGIS Experience Builder, React, Angular, Svelte, Vue, WebGL, CI/CD
1w
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Full Stack Engineer - PHP & Javascript (WordPress)
Denver, Colorado, United States
$103k-$155k/yr HybridFull Time
FareHarbor
FareHarbor: Provides booking and business management software for tour operators.
3+ YOE3+ years working with large-scale PHP/JavaScript codebases, strong WordPress and web accessibility knowledge, solid HTML/CSS, UX focus, and experience with modern web performance practices.
PHP, JavaScript, WordPress, Gutenberg, Twig, Photoshop, Sketch, React, Webpack, Vite, Babel
6d
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Staff Software Engineer, HR Experiences
Denver or San Francisco or New York City
$199k-$247k/yr HybridFull Time
Gusto
Gusto: Cloud-based payroll and HR software for small businesses.
8+ YOE8+ years software development experience; experience with Ruby on Rails, JavaScript/React; building AI agents; mentoring engineers; compliance-domain experience preferred.
Ruby on Rails, JavaScript, React, Claude Code, Codex
1mo
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Forward Deployed Software Engineer
Charlotte or Denver
$75k-$95k/yr HybridFull Time
Flagship Specialty Partners
Flagship Specialty Partners: Provides administrative and operational support to oral surgery practices.
0+ YOE0–2 years experience or strong portfolio; strong data fundamentals (data modeling, SQL, ETL); JavaScript/TypeScript + React and Git familiarity; strong quality-control judgment and ability to direct/verify AI coding agents.
Perplexity Computer, Claude Code, JavaScript, TypeScript, React, Vite, Express, Tailwind, Drizzle, SQLite, DuckDB, Docker, GitHub Actions, Fly.io, Git, SQL
5d
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Front End Software Developer
Sterling or Denver or Aurora
$82k-$172k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
5+ YOERequire TS/SCI clearance,5+ years front-end development,BA/BS in CS or related,proficiency in JavaScript/TypeScript and frameworks (React/Angular/Vue),HTML/CSS,Git,REST,available to work onsite in Sterling,VA or Aurora,CO.
Java, Spring Boot, Spring Framework, REST, JavaScript, TypeScript, Vue 3, Bootstrap, Vite, Mockito, JUnit, Cypress, PostGres, MySQL, Redis, AWS DynamoDB, AWS EC2, RDS, S3, SNS/SQS, Lamda, Git, Jira, Confluence, Gitlab CI/CD, SonarQube, SAST, Docker, Kubernetes, React, Angular, Vue.js
1mo
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Software Engineer (Full Stack)
Denver, Colorado, United States
$125k-$165k/yr HybridFull Time
Bayview Asset Management
Bayview Asset Management: Investment management firm specializing in credit and mortgage assets.
6+ YOEBA/BS in CS or engineering required; 6+ years software development experience with C#, JavaScript, SQL/T-SQL, REST/.NET Core; experience with web development, React preferred, relational DB and SDLC (Agile/Scrum).
C#, JavaScript, SQL, TSQL, SQL Server, React, .NET Core, .NET, ADO, HTML, XML, ASP, AJAX, REST, Web services, Git, Jira, TeamCity, Octopus
1mo
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Software Development Engineer - Developer Platform
Boulder, Colorado, United States
$130k-$196k/yr HybridFull Time
Workday
WorkdayNASDAQ: WDAY: Provides cloud-based software for financial and human capital management.
5+ YOE5+ years software engineering; 5+ years JVM backend (Java or Kotlin) with Spring Boot; 5+ years TypeScript/JavaScript and React; 3+ years cloud-native (GCP or AWS); Bachelor\u0002s or equivalent experience; EM/agentic system familiarity.
JVM, Java, Kotlin, Spring Boot, TypeScript, JavaScript, React, GCP, AWS, OpenAI-compatible APIs, OpenAI-compatible endpoints, Model Context Protocol (MCP), Cursor, Claude Code, Windsurf, Cline, SSE, WebSockets, Jest, React Testing Library, JUnit, Cypress, LangChain, Kubernetes, Helm, HTML, CSS
1mo
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Staff Software Engineer
Santiago or Denver or San Francisco or Nashville
$66496k-$78230k/yr HybridFull Time
Checkr
Checkr: Provides AI-powered background checks and identity verification services.
10+ YOE10+ years software development, 3+ years project leadership, backend expertise (Ruby, Node.js), frontend proficiency (JavaScript, React), bachelor’s or equivalent, fluent English, hybrid availability in Santiago (3 days/week).
Ruby, Node.js, JavaScript, React
3d
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Engineer I - Software
Boulder or Broomfield or Westminster
$65k-$110k/yr OnsiteFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Provides advanced defense, aerospace, and security technology solutions.
BS in engineering or related required; experience with satellite ground systems, ground-system tools, cloud, web services, and back-end/front-end languages; eligible for Top Secret/SCI clearance.
COSMOS, ECLIPSE, OS/COMET, OASIS, AWS, Lambda, Docker, Kubernetes, Spring, Jersey, Flask, CherryPy, Ruby on Rails, JavaScript, Angular, React, JavaFX, Python, Qt, SQL, NoSQL, JPA/ORM, Java, C++, Rust, Ada
1mo
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Software Engineer
Silver Spring or Stennis Space Center or Boulder or Asheville
$64k-$70k/yr RemoteFull Time
Alpha Omega
Alpha Omega: Delivering digital transformation and IT solutions for federal agencies.
4+ YOE4+ years experience, Linux and programming proficiency (Python, R, Scala, C++, Java, C#, JavaScript), front-end (React/Angular), APIs/REST, Git, Kafka/NiFi/Spark/RabbitMQ, strong communication and problem-solving; Public Trust clearance and U.S. citizenship required.
Linux, Python, R, Scala, C++, Java, C#, JavaScript, React, Angular, Git, Kafka, NiFi, Spark, RabbitMQ, JSON, XML, Docker, Podman, Terraform, AWS EKS, AWS Step Functions, AWS Lambda, Amazon Aurora, Amazon DynamoDB, Elasticsearch, Atlassian Jira, Confluence
5d
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Mobile Developer, ServeManager
Denver, Colorado, United States
$96k-$135k/yr HybridFull Time
InfoTrack
InfoTrack: Software platform connecting law firms to courts and litigation services.
3+ YOE3+ years building production mobile apps; strong React Native, TypeScript, modern JavaScript; experience debugging iOS/Android, REST APIs, testing tools; understanding of mobile security and privacy.
React Native, TypeScript, JavaScript, Xcode, Android Studio, REST APIs, TestFlight, Google Play, App Store, Jest, React Native Testing Library, Expo, EAS, Google Play
1mo
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Staff Software Engineer
San Francisco or Denver or Nashville or Santiago
$190k-$264k/yr HybridFull Time
Checkr
Checkr: AI-powered platform for background checks and identity verification.
10+ YOE10+ years software development experience, 3+ years project leadership; backend expertise (Ruby, Node.js), frontend familiarity (JavaScript, React); experience building scalable systems with automated testing and observability; strong communication and mentoring skills.
Ruby, Node.js, JavaScript, React
1mo
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Full Stack Developer
Wheat Ridge, Colorado, United States
OnsiteFull Time
Excel Driver Services
Excel Driver Services: Provides commercial driver license training and safety certification.
Experience building full-stack web and mobile apps using C#/.NET, JavaScript, React Native, HTML/CSS, SQL and Git/GitHub; strong communication, documentation, and collaborative skills.
C#/.NET, JavaScript, HTML, CSS, SQL, React Native, Git, GitHub, Unity
1w
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Senior Algorithm Developer
Broomfield or Fort Collins
$190k-$252k/yr OnsiteFull Time
Anduril Industries
Anduril Industries: Defense technology building autonomous military hardware and software.
8+ YOE8+ years experience and bachelor's in CS/Engineering/Math/Physics (or equivalent); strong C++ and Python skills; foundation in linear algebra, probability, statistics; ability to obtain Top Secret SCI clearance.
C++, Python, SQL, NoSQL, JavaScript, React, Node.js, MATLAB, Simulink
2mo
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Design Engineer
Austin or Denver or Indianapolis or Los Angeles or Minneapolis or Nashville or New York or Salt Lake City or San Francisco or Seattle
$150k-$170k/yr RemoteFull Time
Givebutter
Givebutter: Fundraising and CRM platform for nonprofit organizations.
4+ YOE4+ years frontend engineering; strong JS/TypeScript; HTML/CSS; modern frameworks (Astro/React/Next.js/Svelte); animation and analytics integration; accessible, performance-focused frontend; Git workflows; collaboration with design and product teams.
JavaScript, TypeScript, Astro, React, Next.js, Svelte, GSAP, Framer Motion, View Transitions API, Lottie, PostHog, LaunchDarkly, Segment, Amplitude
3w
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App Engineer
Denver, Colorado, United States
$100k-$115k/yr HybridFull Time
Janus Henderson
Janus HendersonNYSE: JHG: Provides global asset management and investment advisory services.
Proficient PHP and WordPress multisite development, React/Gutenberg block development, SCSS/CSS, JavaScript (ES6+), Git, Composer, npm, Docker, Jira; experience working in Agile teams and integrating third-party APIs.
PHP, WordPress, WordPress VIP, React, JavaScript (ES6+), SCSS, Git, Docker, Composer, npm, Jira, GitHub Copilot, PHP Unit, Veracode
1mo
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Software Engineer
Denver, Colorado, United States
$120k-$150k/yr HybridFull Time
Litera
Litera: AI-powered document and workflow software for legal professionals.
3+ YOE3–5 years software development experience; strong C# and TypeScript/JavaScript; .NET/.NET Core, ASP.NET Core, REST APIs, SQL, Entity Framework; web technologies and frameworks; CI/CD and Git workflows; prompt engineering.
C#, TypeScript, JavaScript, .NET, .NET Core, ASP.NET Core, REST APIs, SQL, Entity Framework, HTML, CSS, React, Angular, Vue, LLM, Git, GitHub, Microsoft Azure, Microsoft Azure DevOps, Microsoft Azure Data Factory, Docker, Kubernetes, AWS, SSAS, MDX, DAX, SSIS, Power BI, SQL Agent Jobs, Stored Procedures, Views
1mo
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Principal Software Test Automation Engineer
Lafayette, Colorado, United States
$122k-$184k/yr OnsiteFull Time
Medtronic
MedtronicNew York Stock Exchange: MDT: Develops and manufactures medical devices and digital health solutions.
7+ YOEBachelors in Computer Science/Engineering, 7+ years in software QA/test automation, 5+ years in medical device or regulated industries, scripting and programming (Python, Bash, JavaScript, Perl, C/C++), Linux, UML, test automation frameworks, Cypress/Jest/Supertest/React, RabbitMQ/REST, FDA QSR and IEC 62304 knowledge, leadership and mentoring expe...
Python, Bash, JavaScript, Perl, C/C++, Linux, UML, Cypress, Jest, Supertest, React, RabbitMQ, REST, Agile, Test-driven development
1mo
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Senior Full Stack AI Engineer
Denver, Colorado, United States
HybridFull Time
Ombud
Ombud: AI-powered sales automation and response management software
6+ YOE6+ years full-stack experience; deep Python; JavaScript/TypeScript and React competence; production LLM integration experience (Anthropic/OpenAI/Google); RAG/embeddings/vector DB knowledge; system design and end-to-end production ownership.
LlamaIndex, Qdrant, Anthropic Claude, OpenAI, Google, Python, JavaScript, TypeScript, React, Node.js, PostgreSQL, Elasticsearch, LangChain, LangGraph, Langfuse, Braintrust, Pinecone, Weaviate, Claude Code
2mo
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Engineer II – Ground/Application Software
Broomfield or Westminster or Boulder or Colorado or United States
$79k-$135k/yr OnsiteFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Provides advanced defense, aerospace, and security technology solutions.
2+ YOEBS in engineering +2 years experience, current Secret clearance with ability to obtain TS/SCI, experience with cloud, containerization, C/C++, Rust, Python, Ruby, web frameworks, databases, UML, and formal software development practices.
CI/CD, Containerization, AWS, Lambda, Docker, Kubernetes, Spring, Jersey, Flask, CherryPy, Ruby on Rails, JavaScript, Angular, React, JavaFX, Python, Qt, C++, Java, Rust, Ruby, SQL, NoSQL, JPA/ORM, PlantUML, Cameo, MATLAB, gtest, ctest, MQTT, AMQP, Kafka, Nginx, Apache, Postgres