Top Full-Stack Engineer Jobs in Denver & Boulder, CO

Reposted 18 Hours AgoSaved
Remote
Colorado
Mid level
Mid level
Edtech • Fintech • Payments • Social Impact • Financial Services • Big Data Analytics
Modernize a large fintech platform by building NestJS services and Next.js UIs, migrate transactional data to relational schemas, write comprehensive tests, identify and fix legacy problems, design scalable solutions that coexist with legacy systems, and use AI tooling responsibly to increase engineering velocity.
Top Skills: AWSBackboneCiClaude CodeCypressDockerExpressFastifyGithub CopilotJavaScriptJestKafkaKubernetesMarionetteMaterial-UiMongoDBMongooseMySQLNestjsNext.JsNode.jsPlaywrightPostgresRabbitMQReactReduxSQLSqsSupertestTypescript
Reposted 11 Days AgoSaved
Easy Apply
Hybrid
Colorado
Easy Apply
136K-204K Annually
Junior
136K-204K Annually
Junior
Sales • Software • Travel
The Full Stack Engineer will develop features for a dynamic web application, collaborate with team members, enhance performance, and improve automated tests.
Top Skills: AngularjsDjangoJavaScriptPythonRelational Databases
Reposted 12 Days AgoSaved
Remote
Colorado
136K-200K Annually
Mid level
136K-200K Annually
Mid level
Insurance • Legal Tech • Social Impact
As a Fullstack Engineer, you'll design, build, and operate web applications, collaborating with product teams and mentoring peers while ensuring best practices in coding and system architecture.
Top Skills: AWSCircleCICloud ComputingCSSDockerGCPGoGraphQLHadoopHTMLJavaJavaScriptKubernetesMapreducePythonReactRestRubyScalaSQLWebpack
18 Days AgoSaved
Easy Apply
Hybrid
Colorado
Easy Apply
103K-155K Annually
Mid level
103K-155K Annually
Mid level
Sales • Software • Travel
Build and maintain FareHarbor.me, a managed WordPress site platform. Develop PHP and JavaScript features, craft themes/plugins and Gutenberg blocks, collaborate with design and product, review PRs, write docs, and improve accessibility, performance, and editor UX across thousands of client websites.
Top Skills: BabelBlock.JsonBlock.Json ConfigurationCSSGutenbergHTMLJavaScriptPhotoshopPHPReactScssSketchTheme.JsonTwigViteWcagWebpackWordpressWordpress Block Editor
18 Days AgoSaved
Remote
Colorado
90K-150K Annually
Mid level
90K-150K Annually
Mid level
Artificial Intelligence • Fintech • Software
Build and own end-to-end full-stack features across backend services and user-facing applications. Contribute to system design, reliability, performance, observability, and engineering practices while collaborating with product and design.
Top Skills: JavaScriptNode.jsNoSQLTypescript
Reposted 18 Hours AgoSaved
Remote
Colorado
248K-336K Annually
Senior level
248K-336K Annually
Senior level
Artificial Intelligence • Cloud • Consumer Web • Productivity • Software • App development • Data Privacy
The role involves leading application performance improvements across multiple platforms, focusing on measurable metrics and driving engineering standards and workflow optimization, using both hands-on coding and strategic influence.
Top Skills: Ai ToolingGoJavaScriptLlmsPythonReactRum Telemetry
Reposted 18 Hours AgoSaved
Easy Apply
Remote or Hybrid
Colorado
Easy Apply
250K-300K Annually
Senior level
250K-300K Annually
Senior level
Legal Tech • Software • Generative AI
Build and own Eve's marketing site and GTM engineering stack: integrate and optimize external tools, design AI agents for sales and marketing, implement webhooks and middleware to sync product/CRM data, and create programmatic campaigns and internal tools in partnership with Marketing, Sales, RevOps, and Product to drive growth and automation.
Top Skills: Ai AgentsCRMCSSHTMLJavaScriptLlmsMarketing AutomationMiddlewarePythonSQLWebhooks
Reposted 18 Hours AgoSaved
Remote or Hybrid
Colorado
180K-200K Annually
Senior level
180K-200K Annually
Senior level
Big Data • Fintech • Information Technology • Insurance • Software
Lead frontend-leaning full-stack implementation work for carrier and enterprise integrations: architect reusable UI and API layers, author RFCs, guide technical delivery, enforce testing and security best practices, and partner with cross-functional teams to scope and ship production integrations.
Top Skills: Ci/CdClaude CodeCursorGithub CopilotGoGraphQLGrpcPythonReactRestTypescript
Reposted 18 Hours AgoSaved
Hybrid
Colorado
125K-155K Annually
Senior level
125K-155K Annually
Senior level
Digital Media • Gaming • Software • Esports • Automation
Develop, maintain and evolve a high-scale US sports trading platform. Build React/TypeScript frontends, backend microservices, optimize SQL and performance, implement CI/CD and automated testing, mentor junior engineers, and collaborate with stakeholders and architecture teams to ensure resilience and integration.
Top Skills: Ci/CdGithub ActionsJenkinsMicroservicesReactReduxSQLTypescript
Reposted YesterdaySaved
Easy Apply
In-Office or Remote
Colorado
Easy Apply
175K-240K Annually
Senior level
175K-240K Annually
Senior level
Machine Learning • Security • Software • Analytics • Defense
Lead full-stack mission engineer who designs, develops, integrates, and deploys software for DoD/IC missions. Lead cross-functional teams to build high-performance frontends and cohesive systems, collaborate with military customers for product discovery, and deploy and field-test solutions in secure operational environments (travel ~1 week/month).
Top Skills: APIsPythonReactTypescript
2 Days AgoSaved
In-Office
Colorado
105K-154K Annually
Senior level
105K-154K Annually
Senior level
Aerospace • Artificial Intelligence • Computer Vision • Software • Analytics • Defense • Big Data Analytics
Design, build, and maintain front-end visualizations and back-end web services for real-time geospatial data. Participate in full software lifecycle, ingest GIS/imagery data, improve tools/processes, and collaborate on modern web frameworks and performance profiling.
Top Skills: AngularBitbucketC++CesiumConfluenceDockerJavaJavaScriptJIRANode.jsPodmanPrismaSqlalchemySshTcp/IpVue
Reposted 2 Days AgoSaved
Easy Apply
Remote or Hybrid
Colorado
Easy Apply
160K-214K Annually
Senior level
160K-214K Annually
Senior level
Real Estate • Sales • Software • PropTech
As a Senior Software Engineer, you'll design, develop, and maintain full-stack applications, utilizing TypeScript and modern frameworks while collaborating cross-functionally to enhance user experience and performance.
Top Skills: Ai Coding ToolsAngularGitGitlabGraphQLNode.jsRestTypescript
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Reposted 7 Days AgoSaved
Remote
Colorado
Mid level
Mid level
Artificial Intelligence • Big Data • Internet of Things • Software
Seeking a full stack engineer to develop applications, requiring skills in Node.js, SQL, and modern JavaScript frameworks with a focus on scalability and performance.
Top Skills: JavaScriptNext.JsNode.jsReactSQL
Reposted 4 Days AgoSaved
Easy Apply
Remote or Hybrid
Colorado
Easy Apply
200K-350K Annually
Senior level
200K-350K Annually
Senior level
Fintech • Software • Financial Services
Design and build a high-performance, AI-native web trading experience for sophisticated retail traders. Ship core trading workflows (order entry, positions, blotter, watchlists, alerts), implement trustworthy AI UI patterns, collaborate with backend engineers on low-latency contracts, and iterate quickly with users and stakeholders to deliver end-to-end product features.
Top Skills: PostgresReactReact NativeRustTypescript
3 Hours AgoSaved
Remote or Hybrid
Colorado
90K-130K Hourly
Mid level
90K-130K Hourly
Mid level
Agency • Artificial Intelligence • Insurance • Analytics • Business Intelligence • Cybersecurity
Design, develop, and deploy full stack web applications. Build front-end and back-end components, integrate systems, write clean documented code, participate in code reviews, troubleshoot issues, and keep current with emerging web technologies and security best practices.
Top Skills: AngularCSSDjangoHTMLJavaScriptMongoDBMySQLNode.jsPostgresPythonReactRuby On RailsWeb Application Security
Reposted 5 Hours AgoSaved
Remote or Hybrid
Colorado
Mid level
Mid level
HR Tech • On-Demand • Productivity • Software
Build and maintain end-to-end product features across frontend, backend, and databases. Design APIs, authentication, data models, integrations, and AI-assisted workflows. Ship production-ready SaaS components, debug across the stack, improve reliability and performance, and collaborate on product and architecture decisions in an early-stage startup.
Top Skills: Ai Coding AssistantsAnthropicAPIsAuthenticationAWSAzureFirebaseGeminiMakeMySQLN8NNext.JsNode.jsOpenaiPaymentsPostgresPythonReactSupabaseVueWebhooksZapier
10 Hours AgoSaved
Remote
Colorado
Senior level
Senior level
Cloud • Information Technology • Software • Automation
Design, build, test, and maintain full-stack applications using backend technologies (.NET/NodeJS/Java) and frontend stack (JavaScript/TypeScript/React). Deploy and manage applications on cloud platforms (Azure/AWS/GCP), implement CI/CD pipelines, work in Agile teams, ensure code quality and security, and collaborate across functions to deliver scalable solutions.
Top Skills: .NetAgileAWSAzureCi/CdGCPJavaJavaScriptNode.jsReactTypescript
10 Hours AgoSaved
Remote
Colorado
Mid level
Mid level
Cloud • Information Technology • Software • Automation
Design, build, test, and maintain full-stack web applications using backend frameworks (.NET, NodeJS, Java) and frontend tech (JavaScript/TypeScript, React). Deploy and manage applications on cloud platforms (Azure/AWS/GCP), implement CI/CD pipelines, follow Agile practices, and ensure code quality and security through testing and reviews while collaborating with cross-functional teams.
Top Skills: .NetAWSAzureCi/CdGCPJavaJavaScriptNode.jsReactTypescript
Reposted 5 Days AgoSaved
Remote
Colorado
Mid level
Mid level
Healthtech
Develop and implement full stack features for a healthcare platform, focusing on both frontend (React) and backend (Node.js) development. Responsible for performance optimization, API creation, testing, and collaboration with data engineering teams.
Top Skills: AWSCypressExpressJestMongoDBNext.JsNode.jsPostgresReactReact Testing LibraryTypescript
Reposted 18 Hours AgoSaved
Remote
Colorado
150K-185K Annually
Senior level
150K-185K Annually
Senior level
Artificial Intelligence • Computer Vision • Analytics • Defense
Design, build, and maintain Ruby on Rails APIs and React frontends; architect and optimize PostgreSQL schemas and queries; manage Docker/Kubernetes services and Terraform IaC; implement PKI/mTLS and secure authentication; solve offline data serialization/synchronization; own CI/CD pipelines and support mission-critical field deployments.
Top Skills: Ci/CdDockerKubernetesMtlsPkiPostgresReactRubyRuby On RailsSQLTerraform
Reposted 18 Hours AgoSaved
Remote
Colorado
Mid level
Mid level
Artificial Intelligence • Blockchain • Digital Media • Information Technology
Develop and support corporate WordPress sites end-to-end: architecture, backend/server logic, integrations (REST/SOAP), plugin/theme development, deployments, CI/CD, server (nginx/apache) configuration, code reviews, and environment setup.
Top Skills: ApacheBemCi/CdGitGulpMySQLNginxPhp 7.0+Restful ApiScssSoapWebpackWordpress
Reposted 18 Hours AgoSaved
Remote
Colorado
Junior
Junior
App development
As a Junior Full Stack Engineer, you'll fix bugs and implement features in a .NET MAUI mobile app and backend, collaborating closely with senior engineers for mentorship and code review.
Top Skills: .Net.Net MauiC#Git
Reposted 18 Hours AgoSaved
In-Office
Colorado
85K-115K Annually
Senior level
85K-115K Annually
Senior level
Fashion
Design, build, and maintain full-stack web applications using modern JavaScript/TypeScript, Node.js and React. Develop RESTful APIs, scalable back-end services, reusable front-end components, and ETL/microservice integrations. Collaborate with product, UX, QA in Agile teams, write unit tests, optimize performance, and document code and APIs.
Top Skills: CSSETLHTMLJavaScriptMicroservicesMiddlewareMySQLNode.jsReactRestful ApisTypescript
Reposted 18 Hours AgoSaved
Remote
Colorado
Mid level
Mid level
Information Technology • Software • Consulting
You will design, build, and maintain scalable applications using Java and JavaScript, collaborating across teams and managing databases.
Top Skills: AngularJavaJavaScriptPostgresReactScalaSQL
Reposted 18 Hours AgoSaved
In-Office
Colorado
Internship
Internship
Marketing Tech • Software
Assist in updating the company dashboard by collaborating on UI design and integrating websites, focusing on front-end development with React.
Top Skills: AngularCSSHTMLJavaScriptNode.jsReactVuejs
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