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

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

Lead UI-focused full-stack development: build high-performance Angular components, implement responsive accessible interfaces from design mockups, optimize front-end performance, influence component libraries and front-end architecture, and contribute to back-end .NET Core APIs and database integration.

As a Senior Full Stack Engineer, you'll design and develop custom Shopify applications, integrate solutions, and collaborate with clients to meet their needs.

Design, build, and maintain scalable web applications using React.js and Node.js with TypeScript. Collaborate with cross-functional teams to deliver features, optimize performance, ensure security, automate deployments with DevOps, write tests, and participate in code reviews.

As a Senior Full Stack Engineer, you'll build high-performance observability tools, engage with developers, and tackle technical challenges in monitoring applications.

Join Feed Media Group as a Full Stack Engineer to build new features for music streaming applications, collaborating with diverse teams and using modern technologies.

The Senior Full-Stack Engineer will oversee full-stack application development, perform code reviews, collaborate with teams, and ensure high-quality outcomes.

The Senior Full Stack Engineer will design and develop user-friendly experiences, lead product enhancements, mentor junior engineers, and participate in on-call rotations to ensure service reliability.

This role involves designing and developing scalable web applications, leading projects, mentoring engineers, and ensuring quality through best practices and collaboration.

Lead full-stack development of email and web services, design scalable architectures, monitor and improve email delivery and sender reputation, build prototypes, ensure reliability and security, participate in on-call rotation, and collaborate with designers and product teams.

Lead full-stack development and architecture for accounts and email services. Build prototypes and features, monitor email delivery and sender reputation, diagnose service issues, improve security/logging/performance/accessibility, conduct code reviews, collaborate on product and design, and participate in a shared on-call rotation to maintain reliable services.

Lead design and implementation of enterprise integrations and backend systems (APIs, microservices) using Azure/GCP, NestJS, and React. Architect solutions, improve platform stability, define CI/CD and DevOps processes, collaborate cross-functionally, and maintain database and performance optimizations.

Develop and optimize web applications, APIs, and backend services. Collaborate cross-functionally and take ownership of features from concept to deployment.

Build end-to-end features, design intuitive interfaces, manage asynchronous backend jobs, and contribute to open-source efforts, while leading project development from concept to monitoring.

As a Senior Full Stack Engineer, you will architect multi-tenant infrastructure, design event-driven pipelines, maintain technical architecture, lead AI-native engineering, and drive product discovery with technical curiosity.

As a Senior Full Stack Engineer, you will drive the evolution of the Partner Platform, focusing on CRM integrations, big data visualizations, and AI workflows, optimizing backend services and enhancing data handling for performance and speed.

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.

The Senior Full Stack Software Engineer at Dropbox will design and develop user-friendly experiences, manage projects end-to-end, and collaborate across teams while leading initiatives and delivering AI-enabled product enhancements.

The Senior Full Stack Developer will build end-to-end solutions, collaborate in a remote environment, and write technical documentation. The role requires expertise in Ruby on Rails and various programming paradigms.

Lead the development of Coperniq's platform by designing, developing, and maintaining scalable full-stack solutions while collaborating with teams and mentoring juniors.

The Senior Full Stack Engineer will design and build APIs, develop user-facing features, mentor other engineers, and ensure high-quality software delivery.

As a Senior Full Stack Engineer at Calendly, you will build and maintain core calendar infrastructure, focusing on API development, synchronization services, and search infrastructure, collaborating with cross-functional teams.

As a Senior Full-Stack Engineer, you will build features across React/TypeScript and Python/Django, shape product outcomes, and collaborate with cross-functional teams to ensure user satisfaction and engineering quality.

The role involves owning the product workflow, building user-facing features, maintaining systems, and collaborating with cross-functional teams. Strong React and Typescript skills are essential.

The Senior Full Stack Developer will design, develop, and maintain web applications using Python and React, while collaborating with cross-functional teams to deliver high-quality software solutions.