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

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 Fullstack Engineer will build and manage enterprise authentication systems, improve user session management, ensure security compliance, and support internal API usage across services, while enhancing performance and reliability.

As a Senior Fullstack Engineer, you'll contribute to backend development for Toast's New Ventures team, collaborating on architecture and launching MVPs while addressing unmet operator needs.

Design and build core services for AI products, implement compliance guardrails, debug fullstack issues, and participate in code reviews.

As a Senior Software Engineer in ZT1, you will lead backend system development, manage projects, and influence product direction in a fast-paced, AI-centric environment.

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.

As a Senior Software Engineer, you'll implement collaboration features, support team architecture, work across tech stacks, and improve developer experience.

As a Senior Full-Stack and Platform Software Engineer at mabl, you will develop features for an AI-powered test automation platform, enhancing user experiences, designing APIs, and optimizing data pipelines while collaborating with cross-functional teams.

As a Senior Software Engineer, you'll design, develop, and maintain full-stack applications, utilizing TypeScript and modern frameworks while collaborating cross-functionally to enhance user experience and performance.

The role involves building and shipping high-quality applications for grocery store operations, collaborating with engineering, product, and design teams, and ensuring software quality through automated testing.

The Senior Full Stack Engineer will design, build, and maintain features for Vello, mentor engineers, and enhance engineering processes, focusing on AI-assisted workflows and full-stack development.

As a Senior Fullstack Engineer, you'll develop end-to-end features for Cart & Checkout, collaborating with cross-functional teams. You will design full-stack solutions and ensure quality through documentation and monitoring, while also mentoring junior engineers and optimizing systems for performance.

Design, develop, and maintain scalable web applications, mentor junior developers, optimize performance, and ensure best practices in coding.

Design, build, and scale data integrations for healthcare systems, collaborating with teams and enhancing functionality while ensuring security and quality.

The Senior Full-Stack Engineer will develop and ship features across frontend and backend systems, work with various frameworks and databases, write specifications, and improve development processes.

The role involves designing and building EHR integrations, developing APIs, and ensuring compliance with health data regulations. Requires collaboration with various teams to implement healthcare workflows.

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.

The Senior Full Stack Engineer will lead Partnerships & Martech projects, optimizing workflows and building tools using Node, TypeScript, React, and GraphQL while collaborating with stakeholders to enhance user experience and operational efficiency.

The Senior Full Stack Engineer will develop banking and investment systems, balancing business and technical needs while collaborating and maintaining the full lifecycle of Autopilot technology.

Develop applications for game operations, build backend APIs, and frontend components using various technologies, collaborating with teams across the company.

As a Senior Full-Stack Engineer at ClassDojo, you'll deliver code and features collaboratively, improve systems and practices, and mentor other engineers, all while impacting education for millions of children.

Join the Entefy team as a Senior Full Stack Engineer to build a scalable full stack application enhancing digital interaction for global clients.

As a Senior Fullstack Engineer, you'll architect and build a high-concurrency auction engine, leveraging AI for enhanced user experiences and system reliability.

As a Senior Fullstack Engineer, you'll build financial systems, design lending infrastructure, implement payment integrations, and create user interfaces, ensuring correctness and reliability.

The Senior Full Stack Engineer will design, develop, and support scalable cloud-native applications on AWS, engaging in both frontend and backend development and leading system architecture decisions.