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

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.

Design and build scalable features for MongoDB's Internal Developer Portal using Backstage. Collaborate with teams to enhance developer workflows and internal tools.

The Senior Full Stack Engineer will develop scalable applications, manage both front-end and back-end tasks, and enhance platform engineering practices. Responsibilities include API development, database design, and technical documentation.

The Senior Full-Stack Developer will design, build, and maintain AIO Logic's cloud-based AXIS platform, utilizing React and Java/Spring Boot to deliver software solutions for complex financial workflows, collaborating with cross-functional teams, and mentoring junior developers.

The Senior Platform Engineer will develop features for an ecommerce platform, mentor engineers, optimize systems, and improve tools and processes.

As a Full Stack Engineer, you will lead innovative software projects for freight logistics, driving technical vision, mentoring others, and delivering scalable solutions across platforms.

Senior Full-Stack Software Engineer position focusing on building, shipping features, and improving code quality using React, TypeScript, and Ruby on Rails.

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.

Join a cross-functional product team to design and build full-stack user-facing features using TypeScript, React/React Native, Node.js, GraphQL, and PostgreSQL. Own features end-to-end, ensure scalability, reliability, and observability, participate in code reviews and RFCs, and collaborate closely with Product, Design, and Data.

As a Senior Full Stack Engineer at Lazer, you will design and build AI-powered applications, manage client interactions, and develop production-ready software solutions.

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.

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.

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 develop user-friendly experiences, lead product enhancements, mentor junior engineers, and participate in on-call rotations to ensure service reliability.

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 role involves designing and implementing server-side services, building data pipelines, and collaborating with frontend teams. Requires proficiency in Kotlin and/or Java, especially with Spring WebFlux, while improving system throughput and reliability.

This role involves delivering high-quality software, collaborating with teams, leading code reviews, and contributing to architectural decisions for scalable systems.

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.

Architect, design, build, test, and deploy highly available real-time systems. Participate across the SDLC, implement automated testing and CI/CD, maintain documentation, troubleshoot and enhance existing software, and collaborate in an Agile/Scrum team environment.

As a Senior Full-Stack Engineer, you'll develop features for Circle's CRM platform, collaborating on both front-end and back-end tasks and participating in the entire development lifecycle.

Design and maintain full-stack features for real-time video, events, chat, and notifications, collaborating with teams to improve performance and reliability.

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.

Design, build, and run full-stack growth experiments end-to-end to improve acquisition, activation, engagement, and monetization. Collaborate with product, design, and analysts, analyze results, iterate quickly, and contribute to experimentation platform and growth infrastructure.

Design and implement core functionalities for a large-scale web application focusing on architectural planning and full-stack features development. Collaborate with senior engineers and ensure clear communication while breaking work into manageable pieces.