Top Tech Jobs & Startup Jobs in Denver & Boulder, CO

Develop resilient enterprise REST APIs with Node.js and build frontend system configurations using Angular or other JavaScript frameworks. Responsibilities include coding, unit testing, QA automation, CI/CD, system configuration, API subscription workflows, release management, troubleshooting, debugging, onboarding-flow validation, test-case execution, defect tracking, and collaborating with engineering on integrations and production readiness.

Own technical capability roadmaps, prioritize program and ART backlogs, define feature requirements, and coordinate delivery across product teams, platforms, vendors, and technology organizations. Partner with architects, engineers, stakeholders, and risk teams to manage dependencies, risks, governance, release readiness, compliance, and production supportability. Track delivery progress, success metrics, adoption, and value realization while facilitating tradeoff decisions, stakeholder alignment, demonstrations, and continuous improvement.

Build and maintain responsive web and mobile interfaces with React.js or React Native while integrating AI and LLM capabilities. Develop prompts, AI agents, copilots, chatbots, RAG workflows, and intelligent assistants using Python and agent frameworks. Collaborate with product, UX, and backend teams, contribute to architecture and code reviews, optimize performance, and evaluate emerging UI and AI technologies.

Lead and mentor QA team to define QA strategy and processes. Design, develop, and maintain Java-based Selenium/Cucumber automation frameworks, integrate tests into CI/CD pipelines, test cloud-hosted AWS applications, manage defect lifecycle, define test plans and metrics, and collaborate with DevOps, development, and product teams to ensure software quality across the SDLC.

Build and deliver backend enterprise web applications for Citi's Integrated Digital Assets Platform using Java/Spring and web3 technologies. Collaborate with distributed teams, follow best practices and design patterns, write technical documentation, resolve issues, and ensure scalability, reliability, and performance.

Design, develop, and maintain scalable full-stack web applications using Java/Spring Boot backends and React frontends. Build RESTful APIs and microservices, implement responsive UIs, write tests, participate in code reviews, troubleshoot production issues, and contribute to CI/CD and DevSecOps practices.

Design, build, and maintain responsive, high-performance React web applications. Create reusable UI components, integrate with REST/GraphQL backends, optimize performance and cross-browser compatibility, participate in code reviews and sprints, and collaborate with designers, backend, QA, and DevOps to deliver enterprise-scale features.

Design, build, and maintain secure, high-performance RESTful APIs and microservices using Java and Spring Boot. Collaborate with cross-functional teams, implement API security (OAuth2/JWT/OpenID Connect), optimize databases, integrate messaging systems, write unit/integration/API tests, participate in code reviews and architecture decisions, troubleshoot production issues, and contribute to CI/CD and DevSecOps practices.

Lead architecture and delivery of enterprise Java full-stack applications. Hands-on development with Java/Spring Boot, microservices, AWS cloud-native services, database tuning (Oracle/RDS), CI/CD pipelines, monitoring, and incident resolution. Mentor engineers, enforce code quality, run architectural reviews, and collaborate with product, DevOps, and security teams to ensure scalable, secure, high-availability solutions.

Design, build, and maintain scalable, responsive web applications using React and TypeScript. Create reusable UI components, implement end-to-end tests with Cypress, optimize performance, collaborate with product/design/backend teams, participate in code reviews, mentor junior engineers, and contribute to architecture and API integrations.