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

Lead the design and development of scalable SaaS platform solutions while producing and enhancing applications in the SaaS ecosystem using full-stack development practices.

Build enterprise-grade features for multi-location customers: frontend React+TypeScript interfaces, admin consoles, backend APIs, SSO/RBAC security, multi-tenant PostgreSQL architectures, and well-tested, maintainable code.

As a Full Stack Engineer, you will build features from database to UI, implement integrations, ensure stability, and improve the platform with a focus on technical excellence and user experience.

The Senior Full-Stack Developer will create software solutions jointly with clients, ensuring high-quality code and effective collaboration with the team.

Lead modernization of a legacy .NET/SQL Server payment-integrity platform: migrate services to modern .NET, design reliable RESTful APIs, improve database performance, implement security and observability, and use AI agents to accelerate refactors and testing while partnering with product, UX, DevOps, and QA to ship high-quality features.

As a Senior Full Stack Software Engineer, you will build and improve products, create user interfaces and APIs, and collaborate with various teams to enhance the customer experience.

The Senior Full Stack Engineer will architect and ship scalable features, mentor teammates, and collaborate on improving the rental platform experience for users.

The role involves shipping full-stack AI projects, designing experiments for AI features, and optimizing AI infrastructure while collaborating with teams.

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 Software Engineer will oversee technical development in a B2B SaaS healthcare environment, mentor junior engineers, and lead product features.

The Senior Fullstack Engineer will autonomously deliver impactful software solutions, collaborating with various teams to innovate and scale the product, ensuring quality across development processes.

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 Tech Lead/Full Stack Engineer will design core features, support system architecture, mentor junior engineers, and lead technical initiatives at Calendly.

Design and implement frontend and backend features for digital asset wallet infrastructure. Collaborate with teams to enhance performance and scalability.

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.

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 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.

As a Senior Full Stack Engineer, you'll design and develop Pearpop's platform, build APIs, optimize applications, and lead technical projects while mentoring junior engineers.

The Senior Full Stack Engineer will design and implement APIs with NodeJS, develop UIs with React, manage data pipelines, and deploy projects on AWS.

The Senior Full-stack Engineer will lead projects from start to finish, collaborating to build reliable and maintainable applications using a variety of technologies. Responsibilities include participating in the SDLC, writing clean code, implementing testing, and ensuring system stability.

As a Senior Full Stack Engineer, you will design and develop scalable systems, mentor engineers, and enhance architectural decisions while improving engineering practices.

The Senior Full Stack Engineer will develop scalable dashboards and tools for risk analysis, manage projects independently, and mentor junior engineers.

As a Senior Full Stack Engineer, you will design and implement features, maintain systems, and ensure performance in a fintech environment, collaborating with cross-functional teams.