Top Senior Software Engineer Jobs in Denver & Boulder, CO

The Senior Software Engineer will develop scalable web applications, lead technical projects, design complex systems, and enhance engineering culture through mentoring and collaboration.

As a Sr. Software Engineer, you'll develop and improve software solutions, collaborate with cross-functional teams, mentor junior developers, and ensure high-quality code while interacting with customers to understand their needs.

The Senior Software Engineer II will design automated reliability systems, improve tooling for incident management, and enhance observability infrastructure, contributing to operational excellence across engineering teams.

As a Senior Software Engineer, you'll build systems for route planning, dispatch, and real-time tracking for various logistics and operations, improving dispatcher tools and user experiences.

Design and develop backend services and APIs for identity resolution, optimize event-driven systems, and enhance system reliability. Mentor engineers and influence architectural decisions.

As a Lead Software Engineer, you'll design and develop GenAI platforms, integrate LLMs, mentor engineers, and solve technical challenges for scalable solutions.

As a Staff Software Engineer Tech Lead, you will lead technical efforts for the POS app, mentor engineers, solve strategic challenges, and enhance development with AI tools.

As a Staff Software Engineer, you'll design and operate traffic infrastructure, lead multi-team projects, ensure service reliability, and mentor engineers while utilizing AI tools for development efficiency.

The Staff Software Engineer will lead technical projects for the Patient Matching team, focusing on scalable systems and API design. Responsibilities include system architecture, mentoring engineers, and collaborating with various stakeholders to enhance patient experiences in mental healthcare.

Lead design and evolution of data interfaces, mentor team, support integrations for live clients, and enhance data tools for scalability and efficiency.

Design and build scalable systems for Upstart Bank, translating regulatory requirements into software, improving reliability, and ensuring audit-readiness while collaborating with multiple teams.

The Senior Software Engineer will design and build scalable backend services for loan origination, improving reliability and operational efficiency. Responsibilities include modernizing infrastructure, supporting partner onboarding, and collaborating across teams to enhance lending processes.

Design, develop, test, and maintain web-based geospatial intelligence applications using Java and/or Python. Integrate relational and non-relational data stores, apply secure coding practices, participate in Agile sprints, conduct code reviews and testing, support performance tuning, and mentor junior developers while maintaining required security clearance.

Develop, test, and maintain web-based geospatial intelligence applications using Java/Python. Design features, integrate relational and NoSQL data, apply secure coding, participate in Agile sprints, code reviews, and CI/CD. Support performance tuning, documentation, and mentor junior developers in a classified environment.

Develop, deploy, and maintain the UDS Registry and related tools (Pepr, Lula). Lead architecture and implementation, integrate with defense systems, participate in on-call rotation, contribute to open source, produce documentation, mentor engineers, and influence product direction with user-focused design.

As a Senior Software Engineer, you'll collaborate to build and maintain automation capabilities, contribute to AI solutions, and ensure scalability, improving the user experience with software solutions.

Design, develop, test, and maintain Python applications on Linux. Use Git and CI pipelines, perform code reviews, troubleshoot and tune production systems, and integrate containerization (Docker, Kubernetes) and AWS services while adhering to DoD security/compliance.

Develops, debugs, and configures simulation-related software for missile defense. Designs and implements simulation entities, extends development frameworks, performs analysis, testing, integration, and user support, and automates operations tools in a team environment.

Join an Aurora-based Agile software team building and maintaining user-facing cloud tools across two programs. Develop in Java, use Kubernetes/Helm, Git workflows, and participate in 2-week sprints and 3-month increments. Requires active Top Secret clearance with SCI eligibility and occasional travel (~10%).

Remote backend engineer role building web services and data pipelines using Scala and Java. Requires Akka/Pekko (streams, actors, clustering, persistence, HTTP), functional programming with Cats/Cats Effect, streaming/distributed system design, AWS services (Kinesis, DynamoDB, SQS/SNS, API Gateway, IAM, KMS), SQL optimization, CI/CD, and hands-on high-availability architecture experience.

Design, develop, and maintain advanced software systems. Collaborate with product, design, and engineering teams. Write clean, scalable code, perform code reviews, debug complex issues, and stay current with technologies.

Develop, prototype, integrate, and test Python-based software for missile warning/tracking missions. Contribute to containerization, testing, deployment, and provide technical guidance to team members while supporting DoD programs and maintaining high software engineering standards.

Lead research, develop, and optimize numerical algorithms for multi-modal remote sensing. Implement high-performance Python and C++ pipelines, validate algorithm performance, integrate into operational systems, mentor engineers, and ensure compliance with DoD mission and software standards.

Develop, prototype, and productionize high-performance numerical algorithms for multi-modal remote sensing (EO/IR, SAR, RF). Implement and optimize signal and image processing pipelines in Python and C++, validate performance against real data, support integration into DoD systems, mentor team members, and contribute to proposals and technical roadmaps while ensuring mission assurance and software quality.

Design, implement, and maintain high-performance Rust software for missile-warning and sensor-data processing. Own complex features end-to-end, contribute to system architecture, optimize for performance and throughput, collaborate with cross-functional teams, support testing/integration/deployment, and follow secure, maintainable coding and Agile practices.