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

4 Days AgoSaved
Remote or Hybrid
Colorado
100K-145K Annually
Entry level
100K-145K Annually
Entry level
Cloud • Computer Vision • Information Technology • Sales • Security • Cybersecurity
Develop and support software, automation tools, dashboards, and alarms for cloud infrastructure, cost attribution, and cloud efficiency. Collaborate with cross-functional teams and senior engineers to design reliable systems, APIs, databases, tests, and AI agents. Contribute to architecture and automation strategies while maintaining strong security, communication, and delivery practices.
Top Skills: Ai AgentsBambooDockerGitlab Ci/CdGoGraphQLJenkinsKubernetesLlmsMachine LearningMySQLOpentracingPostgresPrometheusRestSoapSQL
Reposted 4 Days AgoSaved
Remote
Colorado
159K-254K Annually
Senior level
159K-254K Annually
Senior level
Cloud • Fintech • Food • Information Technology • Software • Hospitality
Develop fullstack web applications, enhance platform performance, collaborate on high-impact opportunities, and ensure stable, scalable solutions. Engage in rapid iterations and be a committed team player.
Top Skills: AWSBootstrapCSSDockerFigmaGitJavaJavaScriptKotlinNode.jsReactSketchTailwind
6 Days AgoSaved
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 software engineering teams developing, integrating, deploying, and maintaining full-stack mission applications for DoD and intelligence customers. Build prototypes and high-performance user interfaces, integrate APIs and independent capabilities, collaborate with military and government operators, and conduct deployment, field testing, and troubleshooting in secure operational environments. Manage customer relationships while ensuring software quality, reliability, and performance.
Top Skills: PythonReactTypescript
10 Days AgoSaved
Remote or Hybrid
Colorado
161K-172K Annually
Senior level
161K-172K Annually
Senior level
Fintech • Information Technology • Insurance • Financial Services • Big Data Analytics
Develop and deploy customer-focused web, mobile, and backend applications across the full software stack. Design major features, contribute to architecture decisions, conduct code reviews, and ensure secure, high-quality implementations. Collaborate with stakeholders and cross-functional teams using Agile and SDLC practices. Manage version control, CI/CD, environments, and releases; maintain automated test coverage and perform root-cause analysis. Build and optimize relational data solutions using SQL Server, including complex queries, stored procedures, and performance tuning.
Top Skills: .NetAgileC#Ci/CdGitJavaScriptJestNode.jsNunitReactSdlcSQL ServerTypescriptWeb Apis
13 Days AgoSaved
Remote
Colorado
Senior level
Senior level
Edtech • Fintech • Payments • Social Impact • Financial Services • Big Data Analytics
Build and maintain scalable e-commerce and marketplace features across Node.js, React, MySQL, and MongoDB. Own complex features end to end, design backend services and APIs, integrate PunchOut procurement systems, improve platform security and reliability, conduct code reviews, and mentor engineers. The role requires strong full-stack JavaScript and TypeScript expertise, e-commerce domain experience, and the ability to work autonomously on high-volume transactional software.
Top Skills: CoupaCxml PunchoutGraphQLJaggaerJavaScriptMongoDBMySQLNest.JsNext.JsNistNode.jsOciOracle ProcurementPci-DssReactRestSap AribaSoc 2Typescript
17 Days AgoSaved
Remote
Colorado
155K-175K Annually
Senior level
155K-175K Annually
Senior level
Software
Build and own CRM features and workflow automations supporting sales, marketing, onboarding, and support. Develop full-stack functionality using Next.js, FastAPI, Inngest, and related technologies; partner with teams to automate workflows; create agentic solutions for enrichment and task automation; and manage features from planning through monitoring and refinement. The role requires strong web development expertise, product sense, autonomy, communication, and experience with modern JavaScript or TypeScript frameworks and orchestration tools.
Top Skills: AirflowAWSClaude CodeClaude DesignCodexCursorFastapiInngestJavaScriptNext.JsNode.jsPostgresPrefectPythonReactShadcn/UiSnowflakeSupabaseTailwind CssTemporalTypescriptVercelVue
Reposted 24 Days AgoSaved
Hybrid
Colorado
135K-180K Annually
Mid level
135K-180K Annually
Mid level
Computer Vision • Fintech • Hardware • Internet of Things • Machine Learning • Software • Transportation
Build and maintain the full-stack platform connecting Blissway hardware to drivers, partners, and agencies. Own public user surfaces, partner integrations (DMVs, mailhouses, fleet vendors, ACH), platform/deployment tooling, service infrastructure, and internal access management. Ensure secure, robust, production-ready systems and tooling that support a fast-moving, small engineering team.
Top Skills: Ach Payment ProcessingAuthentication/Identity ManagementDevOpsIotPythonSaaSTypescript
25 Days AgoSaved
Easy Apply
Remote
Colorado
Easy Apply
236K-325K Annually
Senior level
236K-325K Annually
Senior level
Big Data • Fintech • Mobile • Payments • Financial Services
Leads technical vision and strategy for Affirm’s Marketplace, Search, Ads Platform, and consumer experiences. Designs scalable full-stack platforms, guides architecture and technical excellence, coordinates initiatives across engineering teams, mentors engineers, and drives reliable delivery of customer-focused products across iOS, Android, and Web.
Top Skills: AndroidiOSJavaScriptKotlinReact Native
27 Days AgoSaved
In-Office
Colorado
86K-127K Annually
Mid level
86K-127K Annually
Mid level
Aerospace • Artificial Intelligence • Computer Vision • Software • Analytics • Defense • Big Data Analytics
Design, develop, test, deploy, and support scalable full-stack cloud-native applications using Java, Spring Boot, Vue.js, Python, and FastAPI. Build secure APIs and operate AWS applications with Docker, Kubernetes, and Infrastructure as Code. Collaborate with product, systems, and architecture teams to deliver features end to end. Apply AI-assisted development throughout coding, testing, debugging, code review, and documentation while validating quality, security, and maintainability.
Top Skills: AngularAWSAws CdkCi/CdCloudFormationDevOpsDockerFastapiGCPInfrastructure As CodeJavaKubernetesPostgresPythonReactRest ApisSpring BootTerraformVue
27 Days AgoSaved
Easy Apply
Remote
Colorado
Easy Apply
153K-259K Annually
Expert/Leader
153K-259K Annually
Expert/Leader
Cloud • Security • Software • Cybersecurity • Automation
Leads technical direction and develops fullstack purchase experiences using Ruby on Rails and Vue.js. Designs resilient transactional flows, integrates billing and CRM systems, improves reliability and rollout safety, mentors engineers, reviews code, reduces technical debt, and participates in incident response. Partners with Product, Design, Billing, and Support to improve GitLab’s purchase, subscription, discount, and upgrade workflows.
Top Skills: Ruby On RailsVue
Reposted An Hour AgoSaved
Remote
Colorado
Senior level
Senior level
Healthtech • Social Impact • Telehealth
Volunteer Principal Full Stack Engineer to lead and contribute across frontend and backend (React/React Native, Node.js, MongoDB). Own feature development, mentor engineers, collaborate with product/design, ship scalable code, and support CI processes. Must commit 4+ hours weekly and attend a weekly standup; first task includes launching a fundraising campaign.
Top Skills: C#Css ModulesMongoDBNode.jsReact NativeReactScala
YesterdaySaved
Remote or Hybrid
Colorado
80K-95K Hourly
Mid level
80K-95K Hourly
Mid level
Consumer Web • HR Tech • Database • Web3 • Medical Communications
Design, develop, and deploy full-stack web applications across front-end and back-end systems. Write clean, documented code; integrate application components; troubleshoot technical issues; participate in code reviews; and apply web security best practices. Collaborate with the development team and stay current with emerging technologies.
Top Skills: AngularCSSDjangoHTMLJavaScriptMongoDBMySQLNode.jsPostgresPythonReactRuby On Rails
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Reposted YesterdaySaved
In-Office or Remote
Colorado
120K-200K Annually
Mid level
120K-200K Annually
Mid level
Artificial Intelligence • Fintech • Software • Automation
Design and implement backend features in Go, build data pipelines and REST APIs, work with PostgreSQL and AWS, contribute to scalable system design, and optionally develop React.js user-facing features while collaborating in a fast-paced AI-focused startup.
Top Skills: AWSCi/CdEc2EksGitGoKubernetesPostgresRdsReactRestful ApisS3
Reposted YesterdaySaved
Remote
Colorado
Senior level
Senior level
Information Technology • Professional Services • Consulting
Design, build, and maintain production-grade .NET web applications and APIs on Azure. Own full-stack delivery from data models and SQL to front-end components, CI/CD, testing, and architecture. Collaborate with product and delivery teams, participate in code reviews, and ensure secure, observable, well-tested services.
Top Skills: .Net 6+AngularAzure App ServicesAzure DevopsAzure FunctionsAzure Key VaultAzure Service BusAzure SqlBlazorC#Ci/CdCosmos DbDockerGraphQLGrpcJSONKubernetesOauthReactRest ApisSQL Server
Reposted YesterdaySaved
Remote or Hybrid
Colorado
Senior level
Senior level
Hardware • Internet of Things • Energy • Industrial
Design, build, and optimize scalable cloud and web software with focus on infrastructure, performance, and hardware integration for IoT devices. Collaborate with hardware teams to ensure connectivity and high availability, implement new features, and improve system efficiency.
Top Skills: AWSIotJavaJavaScriptPythonReact
Reposted YesterdaySaved
In-Office or Remote
Colorado
130K-180K Annually
Senior level
130K-180K Annually
Senior level
Artificial Intelligence • HR Tech • Conversational AI • Automation
Join as an early founding full-stack engineer to architect, build, and deploy a scalable platform serving AI-driven voice applications. You will own frontend and backend development, design infrastructure with the CTO, and deliver reliable production systems for enterprise customers.
Top Skills: FastapiNextjsPythonReactTailwindcss
Reposted YesterdaySaved
Remote
Colorado
140K-200K Annually
Mid level
140K-200K Annually
Mid level
Artificial Intelligence • HR Tech • Software
Implement and maintain full-stack features for a career-intelligence platform: architect NestJS/Next.js applications, manage PostgreSQL schemas and queries, build responsive UIs with Tailwind, integrate LangChain-powered AI, implement authentication with Clerk, and create end-to-end tests and automation with Puppeteer to ensure launch readiness and performance.
Top Skills: ClerkLangchainNestjsNext.JsPostgresPuppeteerTailwind Css
Reposted YesterdaySaved
Remote
Colorado
140K-200K Annually
Senior level
140K-200K Annually
Senior level
Artificial Intelligence • HR Tech • Software
Lead architecture and implementation of scalable web applications using NestJS and Next.js. Build and optimize PostgreSQL schemas and queries, implement responsive UIs with Tailwind CSS, integrate LangChain-driven AI features, manage authentication with Clerk, and create end-to-end tests and automation with Puppeteer to ensure launch readiness and reliable user experiences.
Top Skills: ClerkLangchainNestjsNext.JsPostgresPuppeteerTailwind Css
Reposted YesterdaySaved
Remote
Colorado
Entry level
Entry level
Artificial Intelligence • Software • Conversational AI • Automation
Build and maintain core products and collaborate on larger consulting projects using TypeScript, Python, FastAPI, Next.js, GCP, and generative AI frameworks. The role involves hands-on software development within a rapidly growing, remote team serving Saudi Arabia and the GCC.
Top Skills: FastapiGCPGenerative Ai FrameworksNext.JsPythonTypescript
Reposted 2 Days AgoSaved
In-Office or Remote
Colorado
80K-140K Annually
Junior
80K-140K Annually
Junior
Consumer Web • Software • Travel
Join as the founding full-stack engineer to extend a TypeScript React/Next.js prototype, design product features, integrate AI/OCR, write tests and infrastructure, talk to users, and iterate quickly to drive growth.
Top Skills: Content Management SystemJavaScriptLlm/Ai ApisMantineNext.JsOcr/Image-To-TextReactTestingTypescript
Reposted 2 Days AgoSaved
Remote
Colorado
Mid level
Mid level
Information Technology • Software • Consulting • App development
Design, build, and maintain cross-platform mobile applications and end-to-end web features. Implement front-end interfaces, back-end services and RESTful APIs, optimize databases, write tests and documentation, perform code reviews, and collaborate with UX, QA, and DevOps to deliver high-quality, secure, and performant solutions.
Top Skills: .NetAngularCSSGitHTMLJavaJavaScriptMySQLNode.jsNoSQLPHPPostgresPythonReactRestful ApisSQL ServerTypescriptVue
Reposted 2 Days AgoSaved
Remote
Colorado
2K-3K Annually
Internship
2K-3K Annually
Internship
Artificial Intelligence • Edtech • Information Technology • Machine Learning
Work on front-end and back-end web projects: create and redesign websites, build sitemaps and wireframes, collaborate with teams, and focus on UI/UX and performant back-end functionality.
Top Skills: CSSHTMLJavaScript
Reposted 2 Days AgoSaved
Remote
Colorado
Internship
Internship
Information Technology • Marketing Tech • Software • App development
Work on real-world web applications across frontend and backend. Use modern frontend frameworks (React/Angular/Vue) and backend tech (Node.js, Python, Java, PHP). Integrate RESTful APIs with databases (MongoDB, PostgreSQL, MySQL), debug, test, optimize performance, and collaborate with designers and product teams while gaining hands-on mentorship.
Top Skills: AngularCSSGitHTMLJavaJavaScriptMongoDBMySQLNode.jsPHPPostgresPythonReactRestful ApisVue
3 Days AgoSaved
Remote
Colorado
140K-155K Annually
Mid level
140K-155K Annually
Mid level
Healthtech
Designs, builds, tests, deploys, and supports full-stack features for a healthcare Registry platform. Responsibilities include frontend and backend development, PostgreSQL schemas and queries, REST APIs, webhooks, third-party integrations, observability, CI/CD, production troubleshooting, and HIPAA-compliant handling of PHI. The engineer collaborates with Product, Data, and Clinical Operations in a remote startup environment.
Top Skills: AWSCandidCi/CdClaude CodeCursorDbtDockerFhirGCPGithub ActionsGithub CopilotHealthieHipaaHl7HubspotJavaScriptNext.JsNode.jsPostgresPythonReactRest ApisSigmaSnowflakeSpruceSQLTypescriptWebhooksX12/837-835
Reposted 3 Days AgoSaved
Remote
Colorado
90K-130K Annually
Mid level
90K-130K Annually
Mid level
Information Technology • Software
Design, build, and maintain full-stack features across React/TypeScript frontend and C# backend. Develop APIs, optimize MySQL schemas/queries, implement caching, monitor on AWS, participate in code reviews, and collaborate with Product and Design to deliver reliable SaaS solutions.
Top Skills: AWSC#GitMySQLReactTypescript
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