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

Develop and maintain a full-stack web application and platform for fraud analysis. Build APIs and user interfaces, write automated tests, troubleshoot production issues, collaborate with product, design, data science, infrastructure, and solutions engineering teams, and participate in on-call support. Use React, Golang, Python, PostgreSQL, Docker, and AWS technologies to deliver reliable products and meet service-level requirements.

Develop and maintain a fraud-analysis web application and platform. Build APIs and user interfaces, write automated tests, troubleshoot production issues, collaborate with product and cross-functional teams, analyze product metrics, and support SLA compliance through production on-call rotation.

Build and ship custom full-stack programs for AI labs and product teams, including capture flows, task logic, data pipelines, validation, redaction, provenance, and delivery across web, mobile, and backend systems. Partner directly with technical customers to scope ambiguous requirements, determine what to reuse or build, ship production code, establish data quality processes, and turn repeatable custom solutions into core platform capabilities.

Develop and operate CrowdStrike’s internal cloud management platform and mission-critical CI/CD pipelines. Build APIs and UIs using Go and TypeScript, improve developer productivity, integrate tooling, maintain cloud-native infrastructure, and support secure, highly available software delivery systems. Collaborate with development, infrastructure, security, and SRE teams, ensure SOC2-aware processes, and participate in on-call operations.

The Senior Full-Stack Engineer will manage client relationships, design integration solutions, and ensure seamless delivery and optimization of technical workflows, while leveraging AI for efficiency.

Build and ship full-stack web and mobile experiences across Affirm’s consumer products. Break down projects, collaborate with product, design, and analytics teams, develop scalable APIs, write well-tested code, monitor service health, participate in on-call support, review code, and contribute to engineering growth and interviewing.

Develop and deploy scalable full-stack healthcare applications using Go, TypeScript, Angular, and AWS. Responsibilities include technical design, coding, automated unit/integration/end-to-end testing, code reviews, troubleshooting, agile ceremonies, mentorship, architecture improvements, and occasional on-call support. The role contributes technical leadership across frontend and backend systems while collaborating with Scrum teams and cross-functional partners.

Build and improve Grafana’s plugin ecosystem, including Marketplace features, plugin discovery, installation, delivery, review, developer tooling, and portal experiences. Develop across Grafana’s frontend, Go services, and grafana.com; improve reliability and operations in Grafana Cloud; collaborate with plugin developers, partners, product managers, and internal teams to shape the roadmap.

Performs full-stack systems integration, verification, validation, and hardware/software integration for an integrated air missile defense system. Builds development environments using hardware, software, virtual machines, and infrastructure-as-code; supports requirements reviews, testing, deployment, and operational-site integration in the UAE. Collaborates with distributed engineering teams and international customers while applying systems analysis, security, infrastructure, database, and software development expertise.

Develops and supports enterprise compute infrastructure products across on-premises, AWS, and Azure environments. Builds Infrastructure as Code, automated provisioning, DevSecOps pipelines, cloud and database solutions, and self-service capabilities. Performs security, performance, and availability testing; supports incident resolution, compliance, disaster recovery, and on-call operations. Provides technical guidance within Agile delivery teams.

Designs, develops, deploys, and sustains Windows infrastructure for an integrated air and missile defense system in the UAE. Responsibilities include Windows Server administration, Active Directory, virtualization, PowerShell and Ansible automation, cybersecurity remediation, infrastructure support, system integration, and collaboration with distributed agile teams and international stakeholders. The role is a full-time expatriate assignment for approximately two years, with possible extension.

Deploys, configures, patches, secures, and sustains RHEL infrastructure for an integrated air and missile defense system. Automates Linux provisioning and administration, remediates security findings, supports system integration and verification, develops infrastructure solutions, and provides project-team support. The role collaborates in an Agile/Scrum environment and requires a two-year expatriate assignment to the United Arab Emirates.

Designs, develops, and supports infrastructure solutions for an integrated air and missile defense system. Responsibilities include VMware platform administration, enterprise server provisioning, infrastructure automation, cybersecurity remediation, systems integration, and collaboration with project stakeholders. The role decomposes project milestones into actionable work and supports agile delivery across geographically distributed teams.

Designs, develops, deploys, and supports infrastructure solutions for an integrated air missile defense system. Responsibilities include VMware platform administration, enterprise server provisioning, software-defined networking, infrastructure automation, vulnerability remediation, security baseline implementation, systems integration, and collaboration with cross-functional project teams in an agile environment.

Build and own accessible, performant React and TypeScript features across AgentSync’s product. Lead frontend architecture, monorepo evolution, shared component libraries, and design systems while contributing to Go or Java backend services and APIs. Translate ambiguous product problems into plans, use AI-assisted development tools, embed intelligent product experiences, and raise engineering quality through testing, code reviews, mentorship, and strong ownership.

Build and operate the platform powering autonomous defensive agents, including durable workflows, tool and connector frameworks, safe-change pipelines, tenant isolation, ETL, GraphQL services, observability, and audit trails. Develop React and TypeScript operator interfaces with WebSocket streaming for long-running workflows. Partner with AI researchers and security teams to productionize agent capabilities safely across thousands of customer tenants.

Develop and maintain production-ready full-stack software using Java, Spring Boot, React.js, AWS, microservices, and DevOps practices. Design scalable, reliable architectures; write and review code; test and operate products; analyze failures; and improve software reliability. Build generative AI applications using LLMs, RAG, vector databases, semantic search, Azure OpenAI, OpenAI APIs, LangChain, LangGraph, MCP, and AI agents while following security, compliance, governance, Agile, and SRE standards.

Build and operate full-stack healthcare products across frontend, backend, event-driven workflows, data services, integrations, and AI-powered features. Partner with Product and clinical, sales, and operations stakeholders to define problems, ship solutions, measure outcomes, and iterate. Own system design, reliability, security, observability, testing, incident response, and production quality, particularly for patient data, clinical logic, billing, and LLM functionality.

Own the assessment, architecture, integration, testing, deployment, and stabilization of a humanitarian virtual support hotline. Connect Telegram-based patient communication, administrative and professional portals, and the organization’s website into a reliable workflow. Develop analytics and feedback capabilities, ensure accurate data sharing and onboarding, resolve integration issues, and provide post-launch support while independently making and explaining technical decisions.

Own end-to-end development of production-grade AI-enabled applications across React and TypeScript frontends, Python and Node.js backends, PostgreSQL data models, cloud infrastructure, and CI/CD. Translate complex insurance compliance requirements into intuitive software, maintain platform reliability, optimize performance and accessibility, validate AI-generated code, and collaborate with product, design, and business stakeholders. Mentor engineers and drive technical planning, documentation, testing, deployment, and continuous optimization.

Build and scale full-stack applications for maternal healthcare using React and Python. Develop AI-assisted workflows, improve care-team efficiency, maintain production reliability with Datadog, and ensure HIPAA-compliant handling of protected health information. Collaborate with product, clinical, data, and operations teams to translate complex healthcare workflows into practical solutions while establishing strong standards for code quality, testing, and deployment automation.

Design and build multi-agent applications using Google's ADK, including agents, tools, backend APIs, databases, and TypeScript web interfaces. Deploy and operate services on GCP with Cloud Run and Agent Engine. Develop evaluation suites, feedback loops, tracing, logging, authentication, CI/CD, and comprehensive testing to ensure reliable agent behavior. Integrate Gemini models, REST and MCP tools, and customer systems while using AI coding assistants and collaborating with technical leads and stakeholders.

Build and operate full-stack features for an AI-powered consulting platform. Responsibilities include frontend and backend development, data pipelines, APIs, LLM-based extraction, retrieval, chat, content generation, AI coding workflows, testing, evaluations, and quality checks. The role owns platform areas end to end, collaborates with consultants, product, and design, and translates expert judgment into reliable AI-assisted functionality.

Designs and develops scalable full-stack eCommerce platforms using Java, Spring Boot, React, and TypeScript. Leads microservices and micro-frontend architecture, cloud-hosted platforms, distributed data and messaging solutions, streaming and batch pipelines, payment integrations, performance optimization, accessibility, and PCI-DSS compliance. Provides technical leadership, mentoring, architecture guidance, code reviews, documentation, and cross-functional collaboration.

Designs, develops, tests, deploys, operates, and maintains scalable full-stack software products. Builds React-based enterprise applications, writes production-ready code, performs code reviews, improves reliability and performance, integrates APIs, and follows security, compliance, accessibility, and DevOps practices. Collaborates across teams using agile methods, analyzes failures, prioritizes work, and contributes to technology transformation and continuous improvement.