12 fullstack developer jobs at 8 companies in Colorado

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Fullstack Engineer
Boulder, Colorado, United States
$95k-$115k/yr HybridFull Time
Yes Energy
Yes Energy: Private power-market data and analytics serving traders, utilities, asset managers, and energy developers.
3+ YOE3+ years software engineering experience, strong C#/.NET and SQL Server skills, REST API and distributed services experience, working knowledge of JavaScript, SDLC experience, debugging and problem-solving.
C#/.NET, REST, SQL Server, JavaScript
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Senior Fullstack Engineer
Boulder, Colorado, United States
$135k-$160k/yr HybridFull Time
Yes Energy
Yes Energy: Private power-market data and analytics serving traders, utilities, asset managers, and energy developers.
7+ YOE7+ years software engineering experience, strong C#/.NET and SQL Server expertise, JavaScript familiarity, distributed systems and API design, technical leadership and mentoring.
C#/.NET, SQL Server, JavaScript
2mo
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Senior Fullstack Engineer (Freelance)
Paris or Montpellier or London or Denver
€520/day RemoteContract
Sweep
Sweep: B sustainability data management software helping businesses measure, report, and reduce emissions across value chains.
5+ YOE5+ years shipping full-stack product; fluent in React/TypeScript; strong backend foundations (relational DBs, distributed systems, observability, security); Ruby on Rails a plus; strong testing, ownership, and communication skills.
GraphQL, React, TypeScript, Ruby on Rails, CI/CD
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Staff Software Engineer - Fullstack
Westminster, Colorado, United States
$158k-$189k/yr OnsiteFull Time
CesiumAstro
CesiumAstro: Developing advanced communication systems for space and airborne platforms.
8+ YOEBachelor’s degree and 8+ years of software engineering experience. Requires technical leadership, distributed systems, space mission integration, U.S. citizenship, and ability to obtain a Secret clearance.
C++, C#, Rust, Python, Go, SQL, NoSQL, AWS, Microsoft Azure, GitHub, Jira, Confluence, React, Vue, Svelte, Blazor, Distributed Ledger Technology (DLT), DevSecOps, Infrastructure as Code (IaC)
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Senior Software Engineer - Fullstack
Westminster, Colorado, United States
$133k-$161k/yr OnsiteFull Time
CesiumAstro
CesiumAstro: Developing advanced communication systems for space and airborne platforms.
5+ YOEBachelor's degree and 5+ years of software engineering experience required. Requires distributed systems, microservices, cloud, database, testing, and space mission integration expertise; U.S. citizenship and ability to obtain Secret clearance.
Distributed Ledger Technology (DLT), C++, C#, Rust, Python, Go, SQL, NoSQL, AWS, Microsoft Azure, GitHub, Jira, Confluence, React, Vue, Svelte, Blazor
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Software Engineer II - Fullstack
Westminster, Colorado, United States
$113k-$136k/yr OnsiteFull Time
CesiumAstro
CesiumAstro: Developing advanced communication systems for space and airborne platforms.
2+ YOEBachelor's degree in software or computer engineering, 2+ years of software engineering experience, programming foundation, Docker, REST APIs or microservices familiarity, U.S. citizenship, and ability to obtain Secret clearance.
C++, Rust, C#, Docker, REST APIs, Distributed Ledger Technology (DLT), DevSecOps, React, Vue, Svelte, Blazor
3w
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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: Provider of electronic design automation software and semiconductor IP.
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
2w
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Senior Fullstack Engineer | Emerging Products
United States or Austin or Tampa or California or Colorado or Connecticut or Florida or Georgia or Illinois or Kansas or Maine or Massachusetts or New Jersey or North Carolina or New York or Oregon or Tennessee or Texas or Virginia or Washington
$150k-$200k/yr HybridFull Time
NinjaOne
NinjaOne: Privately held NinjaOne provides endpoint management, patching, backup, and remote access software for IT teams and MSPs.
10+ YOEBachelor's degree or equivalent experience, 10+ years software development, 4+ years scalable systems, strong Java, REST/GraphQL, SQL, testing, React, TypeScript/JavaScript, HTML/CSS, and debugging skills.
Java, Kotlin, React, JavaScript, REST, GraphQL, TypeScript, SQL, gRPC, HTML, CSS
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Senior Software Engineer (Fullstack) - 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, Inc.
Scribd, Inc.: AI-powered knowledge serving global readers, professionals, and learners through document, presentation, reading, and social book platforms.
6+ YOE6+ years of full-stack development experience with React and Next.js or Ruby on Rails; cloud service maintenance, incident response, and strong performance, accessibility, SEO, collaboration, and code quality skills.
Ruby on Rails, React, Next.js, GraphQL, Node, Python, Go, Microfrontend, SEO, AEO
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Senior Staff Software Engineer - Fullstack
Westminster, Colorado, United States
$184k-$225k/yr OnsiteFull Time
CesiumAstro
CesiumAstro: Developing advanced communication systems for space and airborne platforms.
12+ YOEBachelor’s degree and 12+ years of software engineering experience required. Requires technical leadership, distributed systems, space mission integration, cloud services, programming, databases, GitHub, Jira, Confluence, U.S. citizenship, and Secret clearance eligibility.
C++, C#, Rust, Python, Go, SQL, NoSQL, AWS, Azure, GitHub, Jira, Confluence, React, Vue, Svelte, Blazor, Distributed Ledger Technology (DLT)
1mo
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Lead Software Engineer - Fullstack: Java, Spring Boot, Microservices, Angular
Dallas or Strongsville or Denver or Phoenix or Pittsburgh or Birmingham
$86k-$158k/yr OnsiteFull Time
PNC Financial Services Group
PNC Financial Services GroupNYSE: PNC: Diversified financial services providing banking and investment solutions.
3+ YOE3+ years relevant experience, Bachelor's degree preferred, expertise in Java and Angular full‑stack development, microservices, cloud native patterns, CI/CD, automated testing, and leadership/mentorship skills.
Java, Spring Boot, Microservices, Angular, TypeScript, RxJS, RESTful APIs, JUnit, Mockito, Jasmine, Karma, Jest, Docker, Kubernetes, CI/CD
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Software Engineer III
Denver, Colorado, United States
$142k-$165k/yr OnsiteFull Time
Cleerly
Cleerly: AI-powered cardiovascular diagnostics serving healthcare providers with non-invasive coronary CT analysis.
5+ YOE5–8 years software engineering experience, fullstack development, proficiency with React, Node.js, TypeScript, RESTful APIs and PostgreSQL; experience with cloud containers, CI/CD, and system design; Bachelor's/Master's or equivalent.
React, CSS, Node.js, TypeScript, RESTful APIs, PostgreSQL, Google Workspace (GMail, Drive, Docs, Sheets, Slides), Slack, Confluence, Jira, Zoom Video, Next.js, Ant, Docker, AWS EKS, CI/CD, Python