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171 senior software engineer react jobs at 97 companies in Westminster, CO

2h
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Senior React SDK Developer
Skopje or Amsterdam or Boulder
RemoteFull Time
Stream
Stream: Provides APIs for in-app chat and social activity feeds.
Experience with React, TypeScript, open-source developer tools, browser and framework performance, accessibility, performance optimization, and testing. Startup experience is preferred.
React, React Chat, Feeds, Video SDKs, TypeScript, RxJS, WebRTC, Protobuf, Twirp, OpenAPI, React Virtuoso, React Markdown, Remark, WASM, WebWorkers, Vitest, Jest, Playwright, React Native, Angular, Vue
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1mo
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Senior React Developer/Architect
Centennial, Colorado, United States
$99k-$172k/yr HybridFull Time
CGI
CGINYSE: GIB: Provides information technology and business consulting services.
10+ YOE10+ years front-end experience with React and TypeScript; expertise in front-end architecture, Node.js, Express.js, Next.js, AEM/Sitecore, testing (Jest/Cypress), Webpack, state management, and CI/CD.
React, TypeScript, Node.js, Express.js, Next.js, Adobe Experience Manager (AEM), Sitecore, Material UI, GraphQL, Jest, Cypress, React Testing Library, Webpack, Redux, Zustand, Recoil, CI/CD, Storybook, SASS, JavaScript
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1mo
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Senior Software Engineer
Denver, Colorado, United States
$130k-$150k/yr HybridFull Time
OrthoFi
OrthoFi: Software for orthodontic practice operations and patient financing.
10+ YOE10+ years software development experience, 4+ years in senior roles. Strong .NET Core/.NET Framework, React/Angular, SQL Server, AWS, CI/CD experience; Bachelor's in STEM required; experience with AI coding tools preferred.
.NET Core, .NET Framework, React, Angular, SQL Server, AWS, CI/CD, Terraform, Datadog, GraphQL, ElasticSearch, Claude, GitHub Copilot, Cursor, Playwright, Model Context Protocols (MCP)
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3mo
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Senior Software Engineer
Denver, Colorado, United States
$143k-$183k/yr HybridFull Time
DAT Freight & Analytics
DAT Freight & Analytics: Software platform for freight matching and logistics data analytics.
5+ YOE5+ years of software development; strong Node.js; AWS; Kubernetes; Datadog; microservices; relational and NoSQL databases; Bachelor's degree in CS or related field.
Node.js, Docker, Kubernetes, AWS, Datadog, Angular, React, Web Components, Kafka, SQL, NoSQL
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1mo
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Senior Software Engineer
Denver or United States
$120k-$160k/yr HybridFull Time
DHI Group
DHI GroupNYSE: DHX: Operates specialized career marketplaces and talent acquisition software platforms.
Experience building production-grade applications with Node.js and TypeScript, REST/GraphQL services, React/Next.js, AWS and container deployments; automated testing and AI-native workflows; senior technical leadership and mentoring.
Node.js, TypeScript, RESTful, GraphQL, React, Next.js, AWS, Docker, Fargate, Kubernetes, Playwright, LiteLLM, Python, Java, PostgreSQL, SNS, SQS, Lambda
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3w
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Senior Software Engineer- Full Stack
Centennial, Colorado, United States
$111k-$160k/yr HybridFull Time
Daxko
Daxko: Software solutions for managing fitness and community centers.
7+ YOE7+ years full-stack software engineering experience with Java/Spring Boot, React/TypeScript, deep SQL Server expertise, testing discipline, and legacy-system migration experience.
Java, Spring Boot, pnpm, React, TypeScript, Vite, MUI, TanStack Query, Zod, ColdFusion, Docker, GitLab CI, AWS, S3, DynamoDB, KMS, Kubernetes, JUnit, WireMock, Vitest, Playwright, Selenium, SQL Server, Flyway, OpenAPI, RabbitMQ, Kafka
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1mo
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Senior Software Engineer
Broomfield, Colorado, United States
$165k-$218k/yr OnsiteFull Time
Anduril Industries
Anduril Industries: Defense technology building autonomous military hardware and software.
5+ YOE5+ years relevant experience and BS in CS/Engineering/Math/Physics (or equivalent). Strong C++ and Python skills, foundation in linear algebra/probability/statistics, software engineering fundamentals, and ability to obtain Top Secret/SCI clearance.
C++, Python, SQL, NoSQL, JavaScript, React, Node.js, MATLAB, Simulink
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1mo
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Senior Software Engineer
Boulder or Austin
$140k-$185k/yr HybridFull Time
Atom Computing: Building scalable quantum computers using arrays of neutral atoms.
5+ YOEBachelor's degree in CS/CE or related, 5+ years software engineering experience, proficiency with Python and SQL, Linux and Git experience, familiarity with automated testing and CI/CD practices, willingness to learn atomic/quantum concepts.
Python, Rust, TypeScript, React, SQL, Linux, Git, Terraform, Azure, AWS, GCP, C++
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1w
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Senior Software Engineer
Aurora, Colorado, United States
$110k-$164k/yr HybridFull Time
Children's Hospital Colorado
Children's Hospital Colorado: Provides comprehensive pediatric medical and surgical healthcare services.
5+ YOEBachelor's degree and 5+ years related experience; strong skills in ASP.NET,C#,Node.js,React,Azure; experience with EMR not mentioned; on-call support and production troubleshooting experience.
ASP.NET, C#, Node.js, React, Azure, GitHub Copilot, Claude Code, Retrieval Augmented Generation (RAG)
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1mo
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Senior Software Engineer (Full-Stack)
Denver, Colorado, United States
$160k-$210k/yr OnsiteFull Time
Cobalt AI
Cobalt AI: Provides autonomous indoor security robots and remote AI monitoring.
5+ YOE5+ years software engineering experience with frontend depth; strong React and TypeScript skills; experience with canvas/2D rendering, WebRTC, data visualization; backend fluency in Python/Django, GraphQL, and PostgreSQL; AWS and container experience; testing and observability; participate in on-call rotations.
React, TypeScript, Django, Python, GraphQL, PostgreSQL, WebRTC, Storybook, AWS, WebSocket
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4d
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Senior Software Engineer
Denver, Colorado, United States
$145k-$165k/yr HybridFull Time
Litera
Litera: AI-powered document and workflow software for legal professionals.
5+ YOEBachelor's degree or equivalent practical experience; 5–7+ years developing production-scale SaaS applications, full-stack systems, APIs, and cloud solutions using Node.js, React, .NET/C#, and TypeScript.
Node.js, React, .NET, C#, TypeScript, AI, GenAI, CI/CD, DevOps
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6d
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Senior Software Engineer
San Francisco or Denver or Nashville or Santiago
$185k-$218k/yr HybridFull Time
Checkr
Checkr: AI-powered platform for background checks and identity verification.
5+ YOEBS/MS in CS or engineering,5+ years full-stack experience,knowledge of Ruby (Rails) and Javascript (React),startup experience,ability to build scalable APIs and own end-to-end product delivery.
Ruby (Rails), Javascript (React), container orchestration, observability tooling, scrapers
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4d
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Senior Software Engineer, Frontend Platform
United States or San Francisco or New York City or Los Angeles or Boston or Seattle or Washington or San Diego or Chicago or Austin or Dallas or Portland or Denver or Philadelphia or Baltimore or Sacramento or Minneapolis or Miami or Atlanta or Phoenix or Orlando or Las Vegas or Salt Lake City or Madison or Birmingham or San Antonio or Spokane or Toronto
$125k-$210k/yr HybridFull Time
Roo
Roo: Digital marketplace connecting veterinary professionals with animal hospital shifts.
Significant production software experience with deep React and TypeScript expertise, full-stack fundamentals, mobile experience, design systems, Figma, and hands-on AI-assisted development.
React, TypeScript, React Native, Figma, Cursor, Claude, Storybook, style-dictionary, Framer Motion, Rive, Lottie, Expo
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1w
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Senior Software Engineer
Denver or United States
$140k-$150k/yr RemoteFull Time
TextUs
TextUs: Cloud-based text messaging platform for business communication and engagement.
5+ YOE5+ years building production software, strong spec authoring and written communication, Rails/full-stack experience, AI-assisted development fluency (Claude Code), ownership and mentorship experience.
Claude Code, Ruby on Rails, Postgres, ElasticSearch, ActiveJob, AWS SQS, Sidekiq, AWS, TypeScript, React, React Native, Chrome
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3d
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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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3d
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Senior Software Engineer- DevOps
Littleton or Denver
$151k-$205k/yr OnsiteFull Time
Four Sea Group
Four Sea Group: Technical mission support and software engineering for aerospace.
6+ YOEBachelor’s degree or equivalent practical experience; 6+ years in software, DevOps, cloud, or platform engineering; active Top Secret clearance; cloud, containers, CI/CD, Linux, automation, networking, and security experience.
AWS, Azure, Google Cloud, Docker, Kubernetes, OpenShift, GitLab CI, Jenkins, Linux, Angular, React, Java, Amazon Web Services, Ansible, Puppet, Terraform, CloudFormation, GitLab, Argo CD, Prometheus, Grafana, OpenTelemetry, ELK Stack, ESXL, SAFe
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4w
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Senior Software Engineer, Offers
Denver, Colorado, United States
$125k-$155k/yr HybridFull Time
bet365
bet365: Provides global online sports betting and digital casino games.
Experience leading development teams, mentoring developers, cloud platform experience, knowledge of React, Typescript, Go/Golang, SQL and Kafka; strong problem-solving and delivery focus.
Go, Typescript, React, SQL, Kafka, GCP, C#, .net, MSSQL, WPF
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3w
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Software Engineer III
Denver, Colorado, United States
$142k-$165k/yr OnsiteFull Time
Cleerly
Cleerly: Provides AI-driven solutions to analyze and prevent heart disease.
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
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3d
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Engineer Senior – Ground/Application Software
Aurora, Colorado, United States
$97k-$165k/yr OnsiteFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Designs and manufactures advanced defense and aerospace systems.
4+ YOEBachelor's degree in engineering or a related technical field and 4+ years of experience required. Requires active TS/SCI clearance, software development experience, and U.S. citizenship.
CI/CD, Docker, Kubernetes, C/C++, Rust, Python, Ruby, AWS, Lambda, Spring, Jersey, Flask, CherryPy, Ruby on Rails, JavaScript, Angular, React, JavaFX, Qt, SQL, NoSQL, JPA/ORM, UML, MQTT, AMQP, Kafka, Vue, Nginx, Apache, Postgres, MATLAB, Cameo, PlantUML, DevSecOps, gtest, ctest, Agile
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1w
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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
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