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

Develop and launch scalable full-stack Quora features using Python and React. Collaborate with designers, product managers, engineers, and data scientists to improve user engagement, moderation, creator experiences, and AI-powered content. Use experimentation and data to guide product iterations, contribute across the development lifecycle, and participate in on-call support for reliable service delivery.

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.

Provides hands-on technical leadership across the full stack, designing customer-facing experiences, APIs, services, data flows, and cloud systems. Leads complex cross-functional initiatives, shapes platform architecture, improves engineering standards, performance, reliability, observability, and security, and mentors engineers. Partners with Product, Design, Data Science, and SRE while driving responsible AI adoption and scalable solutions in a distributed global environment.

Designs and ships full-stack features across Angular, PHP/Symfony, Go, and MySQL. Responsibilities include architecture, data modeling, API design, testing, code reviews, technical design leadership, mentoring engineers, AI-assisted development, production support, incident investigation, and systemic improvements. The role is fully remote in the US and collaborates with global engineering teams.

Build Nango’s developer infrastructure platform across backend services, APIs, runtimes, dashboards, SDKs, CLI, MCP, and web applications. Own product surfaces end to end, work directly with customers, shape product and technical roadmaps, design reliable systems, and maintain open-source projects. The role requires strong backend fundamentals, TypeScript experience across Node.js and React, product ownership, developer empathy, communication, and autonomy in a remote startup environment.

Build and ship end-to-end production features across APIs, databases, user interfaces, and testing. Work primarily with TypeScript, React, Next.js, NestJS, PostgreSQL, and related technologies. Integrate third-party services, maintain scalable systems, debug production issues, write automated tests, and make architectural improvements. The role requires ownership, proactive communication, independent execution, and effective use of AI coding tools in a remote, async-first team.

Own full-stack features for Techstars OS from data ingestion and APIs through React interfaces and production delivery. Build AI-native search, retrieval, and assistive workflows using founder and portfolio data. Lead migration and retirement of legacy tools, develop data pipelines, improve testing and CI/CD, and provide architectural guidance. The role requires strong autonomy, written communication, and end-to-end ownership across cloud infrastructure and product development.

Lead the architecture and delivery of cloud-native, full-stack GEOINT systems and microservices. Develop secure distributed applications, govern AWS and Kubernetes deployments, build DevSecOps pipelines, integrate data and analytics platforms, guide modernization and technical roadmaps, mentor engineers, and partner with mission users. The role requires active TS/SCI clearance and supports classified environments.

Lead the architecture, modernization, and implementation of secure, cloud-native GEOINT applications and microservices. Develop scalable backend services, govern AWS and Kubernetes deployments, implement DevSecOps pipelines, integrate data and search platforms, and guide technical roadmaps. Partner with mission users and engineering teams, mentor developers, conduct code reviews, and evaluate AI technologies. The role requires experience with distributed systems, APIs, databases, cloud infrastructure, classified environments, and an active TS/SCI clearance.

Develop, enhance, test, deploy, and support full-stack enterprise applications in AWS. Build front-end interfaces, backend services, REST APIs, integrations, and database components. Contribute to architecture and technical design, troubleshoot complex production issues, participate in code reviews, and support automated testing, CI/CD, Agile planning, and deployment activities. Collaborate with Product, QA, Cloud/DevOps, and engineering teams while following secure coding and software development standards.

Senior Full Stack Engineer responsible for taking over an existing software project, completing unfinished features, resolving bugs, improving frontend and backend systems, integrating APIs and databases, refactoring for reliability and scalability, and preparing the application for production. The role requires independent ownership, strong debugging and software development skills, collaboration with stakeholders, automated testing, deployment workflows, and clear technical documentation.

Two-year remote training program developing full-stack automation engineering skills. Responsibilities include supporting and developing applications, writing and testing code, automating use cases with Ansible and Jenkins, troubleshooting, improving system efficiency, collaborating with business and product teams, and working with Agile, DevSecOps, cloud, security, networking, and AI technologies.

Build and evolve scalable full-stack systems for People Data Labs’ APIs, self-serve products, and customer success tools. Responsibilities include designing frontend and backend architecture, developing React and Python applications, ensuring data integrity, implementing reliable APIs, optimizing performance, operating production services, collaborating with stakeholders, writing technical designs, mentoring engineers, and improving development practices.

Build and maintain full-stack features for a security infrastructure platform, expand PKI, PAM, and KMS products, work directly with enterprise customers, and explore AI applications in secrets management. The role requires strong JavaScript ecosystem expertise, particularly React, Node.js, and TypeScript, with optional Go and developer tools experience. This is a primarily remote role requiring work during US hours.

Build, optimize, and expand Infisical’s open source security infrastructure platform. Develop product features, work directly with enterprise customers, expand PKI, PAM, and KMS offerings, and explore AI applications in secrets management and security infrastructure. The role requires deep JavaScript ecosystem expertise, particularly React.js, Node.js, and TypeScript, with Go, DevOps, developer tools, and open source experience beneficial.

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.

Build, test, review, deploy, monitor, debug, and maintain full-stack software used in K-12 classrooms. Work primarily with React, TypeScript, Node.js, and AWS while improving complex codebases and service design. Participate in incident response, refactoring, code reviews, pairing, mentorship, and cross-functional collaboration with product, design, and education experts. Use AI tools thoughtfully and prioritize reliable, accessible, and equitable learning experiences.

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.

Build and maintain enterprise workforce management software for forecasting, scheduling, adherence, intraday management, and reporting. Develop Java and Spring Boot microservices, React and TypeScript applications, REST APIs, event-driven workflows, integrations, and PostgreSQL data models. Support cloud-native deployments, CI/CD, testing, performance optimization, production troubleshooting, architecture discussions, and client-facing collaboration.

Build enterprise-scale workforce management software covering forecasting, capacity planning, scheduling, adherence, intraday management, and operational reporting. Develop Java and Spring Boot microservices, React and TypeScript applications, REST APIs, event-driven workflows, integrations, and PostgreSQL data models. Contribute to cloud-native deployments, CI/CD, testing, performance optimization, architecture, production support, and client-facing technical collaboration.

Lead hands-on development and operation of billing, usage, rates, and marketplace systems. Build primarily in Go while contributing to TypeScript and React applications, Kubernetes infrastructure, databases, CI/CD, and cloud services. Improve reliability, automation, observability, auditability, and production recovery. Deliver projects end to end, investigate incidents, participate in on-call, collaborate across teams, and provide technical leadership through design, reviews, mentoring, and operational improvements.

Build and own ElevenMusic features end to end across frontend and backend, from identifying user problems through rapid product launches. Work autonomously with research engineering to apply AI capabilities to music creation, remixing, listening, and streaming. Evaluate system quality, security, and complexity; make strong product decisions; and ship consumer experiences to a large audience. Interest in music and creators is important, with recommendation systems, embeddings, audio products, and open-source experience beneficial.

Build and operate production APIs and backend systems for music and audio AI products. Partner with research engineering to productionize model improvements, design systems that support future model upgrades, and develop creator-facing features. Engineers own product decomposition, legal and safety considerations, launch planning, and collaboration with growth, design, and enterprise customers. The role is remote-first across Europe or the US East Coast, with Central European timezone availability required.

Develop and debug production-grade full-stack applications across front-end and back-end systems. Build features, APIs, databases, and data models; troubleshoot end-to-end issues; analyze unfamiliar codebases; translate implementations across programming languages; and review AI-generated and developer-written code for correctness, security, scalability, performance, and maintainability.

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.