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

As a Senior Software Engineer, you will design and build a cutting-edge identity search platform and implement AI systems for defense applications, working closely with cross-functional teams to enhance user workflows and support national security.

Lead the design and implementation of scalable monetization systems while mentoring engineers and driving technical strategy for revenue growth.

The Senior Full Stack Engineer develops and maintains the US Sports platform, coaches junior engineers, collaborates with stakeholders, and ensures high system performance under demand.

Develop and enhance product features, specifically focusing on third-party integrations and application management while ensuring scalability and improving customer experiences.

The Full-Stack Developer will design and develop cloud-native applications using Angular and Python, implement APIs, collaborate on system architecture, and maintain code quality.

Lead and own full-stack projects across frontend, backend, and infrastructure. Build and improve automated Playwright test generation, self-healing tests, and failure insights. Collaborate cross-functionally, mentor teammates, and contribute to company culture while working a hybrid schedule.

Build and maintain end-to-end web applications: design, code, test, debug, and deploy backend APIs and front-end components. Improve legacy systems, create reusable libraries, and support operations and clients while collaborating with product and customers.

Design, build, deploy, and optimize scalable full-stack applications integrating databases, APIs, and AI/LLM workflows. Lead architecture, CI/CD (ArgoCD, GitLab), Airflow pipelines, and collaborate cross-functionally to deliver production-grade fintech solutions.

Responsible for leading a team of engineers, supporting product development, identifying technical issues, and ensuring high-quality code delivery in backend systems at scale.

As a Full Stack Engineer on the Commerce Squad at Calendly, you will develop and scale features, work with various technologies, and improve delivery processes, while ensuring user value and system performance.

The Senior Full-Stack Engineer will lead technical areas, develop AI application services, maintain APIs, collaborate on design, and ship product features.

Build and maintain high-quality web interfaces, own features from implementation to release, work on performance, and integrate APIs with backend engineers.

Senior Full Stack Engineer responsible for designing, building, testing, and maintaining cloud-based web applications and APIs. Collaborate with product, design, and engineering teams to deliver scalable, secure microservices and improve internal tooling and platform reliability.

Design, build, and maintain Shopify POS applications and custom UI extensions. Integrate POS frontends with server-side logic and third-party services, test on POS hardware, troubleshoot live retail issues, and maintain observability, security, and CI/CD practices while collaborating with product and client teams.

The Full Stack Developer will develop and deliver web applications, integrate APIs, and work with both front-end and back-end technologies. The role demands strong problem-solving skills and the ability to work under tight deadlines with minimal supervision.

Lead and modernize core Laravel/PHP backend systems and high-performance React/TypeScript frontends. Architect integrations (MLS/RETS/RESO), improve video processing and media delivery, strengthen CI/CD and Docker deployments on AWS/Rackspace, introduce AI-driven automation, and provide senior technical leadership and mentorship.

As a Software Engineer I, you'll contribute to the Home and Search Experience team at Affirm, collaborating on backend systems and APIs, ensuring quality code, and driving user engagement initiatives.

As a Fullstack Engineer, you will develop and enhance user experiences for members and providers at Thyme Care, collaborating with teams to deliver scalable products.

The Full Stack Engineer will develop and maintain front-end and back-end components of the application, ensuring performance and integration. Collaboration with cross-functional teams is essential to translate concepts into user-friendly solutions.

As a Full Stack Engineer, you'll develop secure features, integrate data pipelines, design APIs, and collaborate closely with teams to enhance healthcare technology.

As a Full Stack Engineer, you will design and maintain scalable applications, mentor team members, and leverage AI tools to improve development processes, ensuring solutions meet high security and performance standards.

As a Full Stack Engineer, you will build AI-powered applications, manage client interactions, and apply best practices in MLOps and LLMOps.

The Full-Stack Developer will design, develop, and maintain applications, focusing on backend APIs and user interfaces, while optimizing for performance and reliability.

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.

The Full Stack Developer will design, develop, and maintain web applications, collaborate on requirements, build APIs, and optimize databases.