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

YesterdaySaved
Remote
Colorado, CO
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 YesterdaySaved
Easy Apply
Hybrid
Colorado, CO
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 9 Days AgoSaved
Easy Apply
Remote
Colorado, CO
Easy Apply
175K-240K Annually
Senior level
175K-240K Annually
Senior level
Machine Learning • Security • Software • Analytics • Defense
Lead design, build, and deploy full-stack software for DoD/IC missions. Rapidly prototype MVPs, integrate systems and APIs, deliver high-performance frontends, collaborate with users, and deploy/test in secure operational environments.
Top Skills: APIsDevOpsPythonReactTypescript
Reposted 13 Days AgoSaved
Remote
Colorado, CO
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
Reposted 15 Days AgoSaved
Remote
Colorado, CO
120K-150K Annually
Mid level
120K-150K Annually
Mid level
Artificial Intelligence • Fintech • Software
The Full-Stack Engineer will build and maintain applications, own features end-to-end, contribute to system design, and collaborate closely with product and design teams while improving system reliability and performance.
Top Skills: AWSJavaScriptNode.jsNoSQLTypescript
21 Days AgoSaved
Hybrid
Colorado, CO
125K-143K Annually
Mid level
125K-143K Annually
Mid level
Fintech • Real Estate • PropTech
Build and grow Homebot applications, services, and APIs end-to-end. Use AI tooling to rapidly deliver features, create AI-driven workflows, and ship maintainable, well-tested, scalable code. Collaborate with product, design, and engineering, and instrument systems with monitoring, logging, tracing, and analytics.
Top Skills: AIAirflowAmplitudeDbtGraphQLPostgresReactRestRuby On RailsSnowflakeSQLTypescript
Reposted 3 Hours AgoSaved
Remote
Colorado, CO
159K-254K Annually
Senior level
159K-254K Annually
Senior level
Cloud • Fintech • Food • Information Technology • Software • Hospitality
As a Senior Fullstack Engineer, you'll contribute to backend development for Toast's New Ventures team, collaborating on architecture and launching MVPs while addressing unmet operator needs.
Top Skills: JavaKotlin
3 Hours AgoSaved
Remote or Hybrid
Colorado, CO
210K-210K Annually
Senior level
210K-210K Annually
Senior level
Fintech • Information Technology • Insurance • Financial Services • Big Data Analytics
Lead architecture, modernization, and development of Group Insurance applications. Modernize mainframe monoliths into Java microservices and micro-frontends on cloud, mentor distributed Agile teams, collaborate with enterprise architecture, product owners and infrastructure, and enable test automation and integrations. Approximately 10% domestic travel.
Top Skills: Ai/MlAWSAzureBpmCicsCloudCobolDb2DevOpsIntegrationsJavaJavaScriptMainframeMicro-FrontendMicroservicesNode.jsNoSQLPythonRdbmsSalesforceSsoUi FrameworksVsam
YesterdaySaved
Hybrid
Colorado, CO
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
YesterdaySaved
Remote or Hybrid
Colorado, CO
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 YesterdaySaved
Easy Apply
Remote or Hybrid
Colorado, CO
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 YesterdaySaved
Easy Apply
Remote
Colorado, CO
Easy Apply
169K-240K Annually
Senior level
169K-240K Annually
Senior level
Big Data • Fintech • Mobile • Payments • Financial Services
As a Senior Software Engineer in ZT1, you will lead backend system development, manage projects, and influence product direction in a fast-paced, AI-centric environment.
Top Skills: AWSKotlinKubernetesMySQLPythonReactVue
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Reposted 7 Days AgoSaved
Remote
Colorado, CO
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 3 Days AgoSaved
Remote
Colorado, CO
180K-230K Annually
Senior level
180K-230K Annually
Senior level
Software • Defense
As a Senior Software Engineer, you'll implement collaboration features, support team architecture, work across tech stacks, and improve developer experience.
Top Skills: AWSCi/CdKubernetesNode.jsPostgresReactRedisTypescript
Reposted 3 Days AgoSaved
Remote
Colorado, CO
180K-230K Annually
Expert/Leader
180K-230K Annually
Expert/Leader
Software • Defense
The Staff Software Engineer will lead full-stack initiatives, improve system quality, drive technical direction, and mentor peers in a collaborative environment.
Top Skills: AWSCi/CdKubernetesNode.jsPostgresReactRedisTypescript
Reposted 3 Days AgoSaved
Remote
Colorado, CO
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 3 Days AgoSaved
Easy Apply
Remote or Hybrid
Colorado, CO
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
5 Days AgoSaved
Easy Apply
Remote or Hybrid
Colorado, CO
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
5 Days AgoSaved
Easy Apply
Remote
Colorado, CO
Easy Apply
130K-140K Annually
Senior level
130K-140K Annually
Senior level
Artificial Intelligence • Consumer Web • Digital Media • Information Technology • Social Impact • Software
Build end-to-end full-stack AI features on a Ruby on Rails backend and React frontend, design and run experiments (A/B tests and AI evaluations), implement AI infrastructure for reliable LLM inference, and iterate quickly to scale production-ready LLM-powered products.
Top Skills: Ai AgentsLlmsMySQLPostgresReactRetrieval-Augmented Generation (Rag)Ruby On Rails
Reposted 5 Days AgoSaved
Remote
Colorado, CO
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 10 Hours AgoSaved
In-Office
Colorado, CO
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
Reposted 10 Hours AgoSaved
Remote
Colorado, CO
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 10 Hours AgoSaved
Remote
Colorado, CO
Senior level
Senior level
Artificial Intelligence • Big Data • Machine Learning
Design and build API-first, distributed full-stack applications integrating LLMs, RAG, and multi-agent workflows. Implement microservices, real-time features, observability, CI/CD, and cloud-native deployments while mentoring engineers and ensuring scalable, production-grade systems.
Top Skills: Agentic AiAzureDockerFastapiGCPGithub ActionsGoogle Pub/SubGraphQLGrpcKafkaKubernetesLangchainLanggraphLlamaindexLlmsMilvusModel Context ProtocolNext.JsNode.jsOauth 2.0OidcOpentelemetryPgvectorPineconePlaywrightPostgresPythonRagRbacReactRedisServer-Sent EventsTypescriptWebsockets
YesterdaySaved
Remote
Colorado, CO
Mid level
Mid level
Cloud • eCommerce • HR Tech • Information Technology • Analytics
Develop and maintain scalable, high-volume web and mobile systems as a Python full-stack developer. Implement backend services in Python, build React frontends, design microservices on AWS, follow Scaled Agile practices, and collaborate with offshore teams. Bachelor's degree or equivalent required.
Top Skills: AWSMicroservicesPythonReactScaled Agile
YesterdaySaved
Remote
Colorado, CO
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
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