Top Software Engineer Jobs in Denver & Boulder, CO

As a Software Engineer, you will build and maintain a native advertising platform, collaborating with teams to enhance user interfaces and improve ad campaign effectiveness.

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 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.

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, 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.

The Backend Software Engineer will develop data ingestion pipelines, implement observability tools, and provide technical support while improving team collaboration.

Develop and deliver customer-facing UI and end-to-end features to accelerate user acquisition, engagement, and retention. Collaborate with product and design to define metrics, architect scalable frontend solutions, implement front-end and back-end components, and improve developer productivity, performance, and security across self-service properties.

Design and implement CIAM backend services for authentication and authorization. Integrate identity systems, manage secure flows, and automate infrastructure.

Build software using Java, Flink, and Pulsar for trading markets. Assist in hybrid cloud framework development and coordinate with stakeholders on solutions and improvements.

As a Software Engineer, you'll design, build, and maintain IAM solutions, ensuring security and reliability while working with cloud computing standards.

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.

Lead AI-driven development efforts, modernize engineering processes to enhance quality and speed in software development, and implement best practices for AI tools.

The Software Engineer II will design and build backend payment features, develop automated tests, collaborate with teams, and integrate APIs.

Build and operate scalable, fault-tolerant applications on AWS; collaborate with cross-functional teams to design, develop, test, deploy, and monitor features; leverage AI tools and modern CI/CD practices; own solutions end-to-end and contribute to observability and reliability.

As a Software Engineer I, you'll contribute to the Home and Search Experience team at Affirm, collaborating on backend systems and APIs, ensuring quality code, and driving user engagement initiatives.

As a Software Engineer in the Games Studio, you'll develop and maintain casino games, optimize performance, debug issues, and collaborate with teams to deliver quality gameplay experiences.

Develop and optimize frontend systems for the Purchasing Integrations team using JavaScript frameworks, while ensuring performance and integration within diverse merchant environments.

The Software Engineer I will design and implement backend features for Affirm's underwriting platform, focusing on consumer protection and system performance. They will collaborate with teams and stakeholders, ensuring quality and speed in development while participating in team growth activities.

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

The role involves enhancing the Dropbox Android application, solving technical challenges, collaborating with teams, and building engaging features.

Design, implement, and maintain C++ tracking and estimation software for ISR and sensor systems; lead small multidisciplinary teams; support requirements, design, testing, customer demos, and cross-location collaboration.

The Software Engineer III will design, develop, and test software applications for space systems, focusing on CI/CD and Kubernetes, while mentoring others and adhering to security practices.

Design, maintain, and evolve core backend systems and APIs. Collaborate with product teams to create durable and reusable systems while enhancing performance and security.

As a Fullstack Software Engineer, you'll design, develop, and maintain scalable frontend and backend systems while collaborating across teams.

The Software Engineer III/Sr role involves designing and testing software for space systems, guiding other engineers, and requires strong programming and problem-solving skills.