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

Lead design and delivery of full-stack basketball scoring, statistics, and postgame features. Build scalable backend services and APIs with TypeScript and Node.js, develop React web experiences, support iOS and Android products, and make architectural decisions. Collaborate across product, design, and engineering teams, ensure code quality and system reliability, mentor peers, and contribute to technical standards and tools.

Leads architecture, development, and maintenance of scalable full-stack public health surveillance applications. Responsibilities include Java and React development, APIs and HL7/FHIR integrations, DIBBS workflows, record linking and deduplication, CDC reporting pipelines, testing, CI/CD, DevSecOps, technical direction, code review, mentoring, and stakeholder collaboration.

Lead the architecture and delivery of GitLab’s data products, including near-real-time data ingestion, knowledge graph integrations, data marketplaces, observability, and data-sharing APIs. Translate ambiguous 0-to-1 initiatives into roadmaps, resolve cross-team dependencies, ensure operational readiness across deployment surfaces, and mentor engineers. The role requires deep full-stack expertise, technical leadership, and experience with AI-powered orchestration and multi-tenant SaaS systems.

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.

Build backend-focused Java/Kotlin APIs and data-driven product features, while contributing to React dashboards and workflows. Design scalable systems, participate in architecture and code reviews, troubleshoot production issues using observability tools, and collaborate with data, reporting, design, and product teams to launch emerging products.

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.

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.

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.

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.

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.

Develop and enhance full-stack web applications for CDMRP, including portal integrations, single sign-on, microservices, responsive front-end and back-end features, REST APIs, testing, performance optimization, and legacy modernization. Collaborate with portal, systems administration, and security teams; apply UX practices; document architectures and services; and ensure compliance with DoD security procedures and STIG guidelines.

Develop and maintain Java applications, RESTful services, and Angular frontends using Spring Boot and NgRx. Deploy applications to cloud platforms, practice TDD, manage CI/CD with Jenkins, and work with Oracle and PostgreSQL databases. Participate in agile processes, collaborate with cross-functional teams, mentor engineers, and independently lead technical initiatives and feature delivery.

Build and scale foundational services, APIs, pipelines, and distributed systems for an AI-powered SMS marketing platform. Own backend systems, improve scalability, reliability, modularity, and observability, and collaborate with engineering, data, product, and go-to-market teams. Use AI-first development practices, contribute to AI integration strategy, reduce technical debt, and support high-scale customer workloads across AWS and Kubernetes.

Build and scale highly available applications and services for Mux’s video platform. Develop customer-facing features across Elixir and Go backend services and React frontend applications, including billing, usage, identity, account management, webhooks, and alerting. Collaborate on technical roadmaps while solving distributed systems, concurrency, scheduling, scaling, and platform resilience challenges. Deploy complex applications using cloud platforms and Kubernetes.

Build and scale full-stack platform services for user onboarding, identity management, privacy controls, and secure public-safety workflows. Develop React applications, Node.js APIs, database models, and complex SQL queries. Containerize applications with Docker, deploy Kubernetes microservices using Helm, and leverage AWS services including S3, API Gateway, and SQS. Solve authentication, authorization, performance, and data-security challenges while shaping foundational platform architecture.

Develop and maintain React front ends and Java Spring Boot back-end services for a transportation-command modernization program. Responsibilities include building reusable components, integrating REST APIs, modernizing legacy applications, writing automated tests, troubleshooting performance and usability issues, participating in code reviews, supporting CI/CD deployments, and collaborating with analysts, designers, testers, and DevSecOps engineers. The role is fully remote and requires eligibility for a Secret clearance and an active IAT Level II certification.

Develop and maintain scalable full-stack applications for telecom and contact center environments. Build Java and Spring Boot microservices, REST APIs, event-driven integrations, frontend applications with Angular or React, and Node.js components. Work with PostgreSQL, OpenAPI, containers, and Jenkins CI/CD pipelines while optimizing performance and reliability. Collaborate with QA, DevOps, Product, and engineering teams on technical design, architecture, code reviews, and implementation decisions.

Lead full-stack development for secure, scalable mission planning and command-and-control software supporting space communications programs. Build frontend interfaces and backend services, design APIs, translate mockups into applications, conduct code reviews, improve quality and security, and mentor junior engineers. Work with modern web frameworks, containerized microservices, and highly secure government environments while owning technical problems end to end.

Develop full-stack platform services for secure, scalable satellite ground communications. Responsibilities include building Python backend services and APIs, TypeScript front-end applications, microservices, authentication and authorization, database solutions, cloud deployments, automated testing, and container orchestration. The engineer will create technical designs, troubleshoot production issues, collaborate with MBSE and Test teams, support integrations, and ensure solutions meet mission, security, and system requirements.

Develops secure, scalable satellite communications platform services across backend and frontend components. Responsibilities include Python services, PostgreSQL development, microservices, OAuth 2.0 and JWT security, TypeScript UI work, containerized deployment with Docker, Kubernetes, and Helm, Agile collaboration, troubleshooting, code reviews, and integration support.

Leads the architecture, development, testing, deployment, and documentation of complex full-stack software solutions. Builds scalable Java and Spring Boot backends, Angular interfaces, APIs, database integrations, and CI/CD pipelines. Ensures security, performance, coding standards, and software quality while mentoring developers, leading code reviews, evaluating technologies, and collaborating with product, business, QA, and other stakeholders in Agile environments.

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 end-to-end features in a JS/TS stack, designing scalable backend services and responsive real-time frontends. Improve observability, performance, and reliability, collaborate with product/design, and own full-stack implementation from APIs and data models to UI.

Develop full-stack enterprise applications and microservices using Java, Spring Boot, REST/OpenAPI, relational databases, JMS, and Kafka. Build automated tests, Docker containers, Kubernetes deployments, CI/CD pipelines, API portals, and React or Angular interfaces. Troubleshoot application, database, messaging, and cloud-native infrastructure issues while applying secure coding, API governance, observability, and event-driven architecture practices. The role supports federal civilian programs remotely during East Coast hours, requires U.S. citizenship, quarterly travel, and either Public Trust eligibility or an active Secret clearance depending on program.

Design, build, test, deploy, and scale full-stack SaaS features across Angular and backend services using Spring. Develop APIs, optimize relational and NoSQL databases, integrate third-party systems, improve performance, support cloud infrastructure and CI/CD, implement security practices, monitor services, resolve incidents, and contribute to architecture and agile development.