Top Software Engineer Jobs in Denver & Boulder, CO

Lead architecture, modernization, and development of Group Insurance applications. Modernize mainframe monoliths into Java microservices and micro-frontends on cloud, mentor distributed Agile teams, collaborate with enterprise architecture, product owners and infrastructure, and enable test automation and integrations. Approximately 10% domestic travel.

Build and optimize backend data pipelines and calculations for 7M+ securities using Python/Django. Implement Airflow pipelines, pandas/Celery-based async calculations, database query tuning, caching, scalable data models, incident investigation, code reviews, and cross-team collaboration to ensure timely, accurate financial data.

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

Build, operate, and scale backend systems for card issuing and transaction processing. Break down projects, collaborate with product and cross-functional teams, write tested extensible code, support monitoring and on-call operations, and participate in team growth activities including interviews.

Build and own end-to-end patient onboarding features that improve acquisition, registration, eligibility verification, and conversion. Partner with Product, Design, Analytics, and engineers to run experiments, ship scalable frontend/backend systems, optimize performance and resilience, and iterate based on data to improve patient outcomes.

Lead frontend-leaning full-stack implementation work for carrier and enterprise integrations: architect reusable UI and API layers, author RFCs, guide technical delivery, enforce testing and security best practices, and partner with cross-functional teams to scope and ship production integrations.

Blissway seeks a Software Engineer to build robust systems for toll collection and highway safety. Responsibilities include coding, scaling prototypes, and integrating ML models.

Build and own Eve's marketing site and GTM engineering stack: integrate and optimize external tools, design AI agents for sales and marketing, implement webhooks and middleware to sync product/CRM data, and create programmatic campaigns and internal tools in partnership with Marketing, Sales, RevOps, and Product to drive growth and automation.

As a Senior Software Engineer in Trust & Safety, you'll analyze threats, design systems for abuse detection, and collaborate with teams to implement scalable defenses.

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.

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

Design, develop, and test complex flight and space systems software. Write maintainable code, perform code reviews, use version control, troubleshoot issues, document configurations, and mentor junior engineers. Participate in SITL/HITL testing and follow software development best practices.

The role involves leading application performance improvements across multiple platforms, focusing on measurable metrics and driving engineering standards and workflow optimization, using both hands-on coding and strategic influence.

Design, build, and maintain scalable, reliable full‑stack systems. Contribute to API and architecture design, write testable code, debug complex issues, improve performance, automate deployments, and mentor junior engineers while collaborating with cross‑functional teams.

Design, build, and maintain scalable, reliable systems and APIs across a primarily TypeScript stack. Deliver features independently, improve performance and observability, contribute to architecture and CI/CD, debug complex issues, and mentor junior engineers while collaborating with cross-functional teams.

Design, develop, integrate, and maintain ERP financial applications using Oracle and PL/SQL. Optimize performance, resolve defects and integration issues, apply security and compliance standards, participate in Agile/Scrum, lead code reviews, estimate work, and mentor junior developers to support finance operations and revenue objectives.

Modernize and maintain Boeing's MILSATCOM ground system across the full software lifecycle. Design, develop, and test responsive applications using Java, Python, C++, and web technologies. Perform code reviews, risk analysis, integration troubleshooting, and support system accreditation/security requirements. Mentor junior engineers, collaborate with end users, and work in Agile environments using Atlassian tools.

Support modernization of MILSATCOM ground systems across the full product lifecycle. Develop, maintain, and test software; create automated test scripts and verification artifacts; perform integration troubleshooting; participate in trade studies and risk assessments; collaborate with cross-functional teams and follow Agile processes.

The Software Engineer will develop Java-based applications, support the software development lifecycle, and mentor junior engineers in a missile defense project.

Boeing seeks motivated C2BMC Systems Software Engineers to design, develop, maintain, and test Java applications for missile defense systems, support agile lifecycle processes, and mentor junior engineers.

Develop and implement full stack features for a healthcare platform, focusing on both frontend (React) and backend (Node.js) development. Responsible for performance optimization, API creation, testing, and collaboration with data engineering teams.

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

Lead a team to develop user interfaces for mission-critical solutions. Responsibilities include code contributions, guidance, task assignments, and maintaining CI/CD pipelines.

Design, develop, test, and support Java-based software and algorithms for the C2BMC/BMDS. Produce software design artifacts, decompose system requirements, participate in Agile/Scrum, perform integration and test, and collaborate across multi-company teams.

Develop, test, and operate software supporting radiometric calibration and performance of a satellite constellation. Maintain CI/CD pipelines, cloud-based distributed services, and production operations. Collaborate with scientists and SMEs to commission sensors, design new services, ensure reliability, troubleshoot issues, and drive software best practices across RadCAM and broader engineering teams.