Top Principal Software Engineer Jobs in Denver & Boulder, CO

The Principal Software Engineer designs, develops, and tests software for space systems. Responsibilities include coding, technical leadership, system architecture, and mentoring, while adhering to best practices and software development methodologies.

This role involves leading technical projects across multiple teams, designing scalable systems, collaborating with cross-functional teams, and mentoring engineers, focusing on payroll and tax systems at Gusto.

As a Principal Software Engineer, you will write scalable SaaS solutions, optimize performance, and address technical debt while collaborating across teams.

The Principal Software Engineer will lead front-end development using React, mentor teams, and oversee high-performance web applications in a collaborative environment.

The Sr. Principal Software Engineer designs, develops, and tests software for space technologies, leading a team, making design decisions, and ensuring project success while complying with security requirements.

The role involves building and optimizing a machine learning and simulation platform, supporting MLOps, model deployment, and infrastructure modernization, while mentoring engineers.

The Principal Software Engineer will define technical roadmaps, guide system architecture, mentor leaders, and drive product direction in Capital Supply operations.

The Principal Engineer will lead technical direction across multiple teams, design architecture for financial systems, mentor engineers, and drive multi-year transformations in the Money Group.

The Principal Software Engineer at Dropbox leads technical strategy and execution on critical software systems, focusing on AI integration and product development across teams. The role requires deep technical expertise and a collaborative approach to shaping company objectives and long-term strategies.

As a Senior Principal Engineer, you'll define and drive the technical strategy for customer experience platforms, lead architectural decisions, and mentor engineering teams to enhance customer and agent experiences.

As a Principal Software Engineer for the AAP team at Toast, you will design scalable systems, develop technical strategies, mentor engineers, and enhance data-driven initiatives.

Design, develop, and test software applications for space systems, providing technical leadership and mentoring while ensuring code quality and scalability.

The Principal Software Engineer will enhance customer experiences and lead software solutions, collaborating across teams to drive innovative technology in a fast-paced environment. Responsibilities include coding, mentoring, optimizing data pipelines, and defining development standards.

Lead the architectural design and development of a new consumer credit product, focusing on backend systems, distributed services, and integrating AI tools. Mentor team members and influence product direction through engineering insights.

Design and develop software applications for space systems, providing technical leadership and mentoring while ensuring high availability and security practices.

The Principal Software Engineer leads software solution development, directs the software engineering life cycle, and guides architecture for PNC's Tempus Technologies. Responsibilities include automation, security oversight, and collaboration across teams to enhance systems and product offerings.

The Principal Software Engineer will architect and oversee the development of distributed systems, mentor engineers, and drive architectural initiatives for large platforms.

The Principal Software Engineer will architect real-time conversation systems, deliver production code, and integrate generative AI into workflows for live customer interactions.

The Principal Software Engineer - Web is responsible for designing and developing new features for Yahoo Mail, mentoring peers, and enhancing user experience. This role requires strong knowledge of web technologies and collaboration with cross-functional teams to deliver high-quality updates and improvements.

Design and develop flight software for space systems, mentor engineers, and ensure adherence to software development principles in an Agile environment.

Lead architecture and technical direction for Ruby on Rails and React systems, design scalable APIs and front-ends, own services/databases/infrastructure (MariaDB, Redis, Elasticsearch), use Kubernetes for scaling, integrate AI-assisted development workflows, mentor engineers, and deliver secure, well-tested production releases.

The Principal Software Engineer will lead technical and architectural efforts on government systems, mentor teams, ensure program success, and engage with stakeholders.

Lead AI-driven software engineering solutions, coach junior to senior engineers, manage complex software projects, and improve operational excellence.

Lead engineering initiatives for automating network solutions, improve global infrastructure, ensure reliability, and manage operational problems with a focus on customer satisfaction.

The Principal Software Test Engineer will lead software testing initiatives, mentor junior engineers, and oversee testing strategies while ensuring quality across complex aerospace software systems.