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.

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.

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

The role involves leading engineering efforts in backend and full-stack development, working with enterprise customers, and building scalable systems for automation and asset management, while applying AI tool advancements.

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.

Build full-stack, user-facing features alongside ML engineers using TypeScript, Node.js, GraphQL, and Postgres. Implement and integrate AI/LLM/ML tools, own features end-to-end from design to production, maintain scalability/reliability/observability, participate in code reviews and design discussions, and contribute to product ideation and RFCs.

Lead design, build, and scale GridUnity's cloud SaaS platform. Own end-to-end features, mentor engineers, drive architecture, improve scalability/reliability/security, collaborate with product teams, and introduce engineering best practices and tooling.

Design, build, and maintain resilient full-stack services for distributed financial SaaS systems. Lead end-to-end projects, optimize performance, ensure security and observability, mentor teams, and reduce technical debt.

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.

Lead full-stack projects, collaborate with cross-functional teams, set high quality standards, mentor teammates, and participate in on-call rotations.

The Senior Full-Stack Engineer will develop user-facing features, maintain high-performance interfaces, implement backend APIs, and ensure product reliability and performance in a growing AI marketplace.

As a Senior Full Stack Engineer, you'll design and scale core features for Calendly's AI Notetaker, lead feature implementation, and mentor team members.

As a Senior Full-Stack Engineer, you will build investment and banking products, design backend services, and improve engineering processes while leveraging modern cloud and microservices technologies.

The Senior Full Stack Developer will create new features, lead development efforts, mentor peers, and ensure high-quality software in an agile environment.

The Senior Full-Stack Developer is responsible for architecting, developing, and maintaining complex web applications. They collaborate with Marketing and IT to ensure successful implementation of strategic features, manage CI/CD pipelines, and advocate for best engineering practices.

Design and implement full‑stack features for the Creatives Library: build scalable, performant web applications, collaborate with product and design, write technical designs, own projects end‑to‑end, mentor junior engineers, and participate in code reviews using modern stacks.

Build end-to-end AI features across the stack: backend Go services orchestrating agentic workflows and tool integrations, frontend TypeScript/React experiences, APIs, workflow orchestration, performance and observability improvements, and mentor junior engineers.