Top Software Engineer Jobs in Denver & Boulder, CO

Design, develop, test, and maintain web-based application features; debug across the full stack (OS, DB, applications, JavaScript, network); write testable code and documentation; participate in code reviews; mentor teammates; conduct technical research and contribute process/product improvements within an Agile team.

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

As a Software Engineer II in the Credit Decisioning team, you will design and develop backend systems, collaborate with cross-functional teams, and support project delivery and operations.

Develop scalable APIs and microservices; manage solutions in cloud environments; mentor junior developers and troubleshoot production issues.

Design, develop, and maintain AI-powered applications. Collaborate with engineering and product teams to deliver scalable solutions and mentor other engineers. Conduct experiments to guide product decisions.

As a Software Engineer, you'll develop software using Ruby, Javascript, and support AWS infrastructure. Responsibilities include maintaining and building applications, contributing to high-end software releases, and mentoring other engineers.

Build and scale backend services for verification orchestration, decisioning, and fraud detection. Integrate third-party data providers and ML models, develop rule engines, maintain APIs and Kafka events, improve document automation, and enhance observability, compliance, and platform reuse across lending products.

Build and scale full-stack systems and microservices powering engagement features (credit health, financial wellness, gamification). Design event-driven, Kafka-based pipelines, collaborate cross-functionally, support experimentation/A-B testing, ensure regulatory/compliance alignment, and improve reliability and performance of production systems.

Full‑stack engineer building donor and fundraising features using React, TypeScript, REST, and Ruby on Rails. Deliver small-to-medium projects, improve performance and maintainability, participate in code reviews and QA, collaborate with product and design, and contribute to architecture and team mentorship.

Design, build, and scale highly performant, highly available backend systems for advanced crypto trading instruments. Architect robust services supporting multiple instrument types, collaborate with product and design, and deliver high-value, observable features for traders worldwide.

As an Infrastructure Software Engineer, you will build and optimize scalable systems for user data management while mentoring peers and collaborating on innovative solutions.

Lead the design and implementation of backend services for data cataloging and ML training systems, focusing on performance and scalability.

Join the Payments team to design, build, and maintain secure, scalable payment systems. Work across the stack on payment processing, recurring contributions, fraud mitigation, ETL pipelines, testing, monitoring, and operational tooling. Collaborate with product, platform, ops, and security teams to deliver reliable features, debug complex issues, and improve payment workflows while contributing to team documentation and on-call support.

Design and implement secure, scalable backend services for voice agents, integrate AI models and telephony, improve inference, debug concurrent systems, and collaborate with Product to deliver features end-to-end.

As a Full Stack Software Engineer, you will develop tools for cloud management, build APIs and UIs, and maintain cloud systems.

The Software Engineer II designs, develops, and tests software for space systems, collaborating with team members to deliver innovative solutions and manage code using version control systems.

The Software Engineer II designs, develops, and tests software for space systems, writing code, collaborating with teams, and contributing to innovative solutions.

As a Software Engineer, you'll lead projects, make architectural decisions, and collaborate with cross-functional teams to enhance our auto refinance and secured personal loans products.

As a Software Engineer at Anduril Industries, you'll develop innovative algorithms and software, work with high-performance systems, and engage with military customers to meet mission-critical needs in an agile environment.

The Senior Mobile Software Engineer will develop high-performance mobile applications, optimize performance, and collaborate with teams to enhance the user experience while ensuring app quality through testing and debugging.

As a Software Engineer on the AI Products Team, you will develop new features and improve LLM model results while engaging with customers and shaping team culture.

The Software Engineer will develop voice AI features, enhance LLM model performance, build infrastructure, and collaborate with teams and customers to improve the voice AI platform.

Lead the frontend platform's evolution, architect complex UIs, mentor engineers, and drive performance and testing excellence while collaborating with cross-functional teams.

As a Full-Stack Product Engineer, you'll develop secure document management features, collaborate with teams, and participate in continuous deployment.

Design and develop scalable software, collaborating with cross-functional teams to enhance user experiences while participating in operational excellence efforts.