Top Senior Software Engineer Jobs in Denver & Boulder, CO

Design, build, and maintain front-end visualizations and back-end web services for real-time geospatial data. Participate in full software lifecycle, ingest GIS/imagery data, improve tools/processes, and collaborate on modern web frameworks and performance profiling.

Develop, code, test, and maintain application software components. Participate in requirements analysis and design, follow software development processes, and produce documentation and test plans.

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.

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

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.

Lead design, develop, test, and maintain full-stack Java enterprise applications and native mobile apps (iOS/Android). Build Spring Boot microservices, responsive frontends (Angular/React/Vue), integrate APIs, ensure security and performance, participate in CI/CD and DevOps, mentor engineers, and support app releases and production troubleshooting.

As a Billing & Analytics Software Engineer, you'll design and maintain the billing pipeline, integrate billing systems, and develop customer-facing analytics dashboards to support revenue recognition and operational observability.

As a Principal Flight Software Engineer, you will lead the architecture and development of flight software for space missions, ensuring safety and reliability while collaborating on technical decisions and standards.

As a Staff Flight Software Engineer, you will assist in the software development cycle, integrate GNC algorithms, maintain command telemetry databases, and develop reusable driver libraries for flight hardware.

Lead full‑stack design and delivery of customer-facing web experiences (Browse, Navigate, Preview). Own architecture, APIs, data models, rollouts, observability, on‑call readiness, and cross-team alignment, using approved AI-assisted workflows while ensuring technical quality and reliability.

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.

Lead design and delivery of scalable customer-facing features, services, and APIs that process real-time data and AI-powered insights. Build web experiences, contribute to LLM/AI workflows, ensure reliability through observability and rollout practices, and collaborate cross-functionally with Product, Design, ML, and platform teams.

Lead development and maintenance of high-performance React Native apps across iOS and Android. Improve architecture, manage RN upgrades, debug native modules, own automated testing and CI/CD, optimize performance and stability, and mentor engineers within cross-functional product pods.

Senior full‑stack engineer building and scaling React frontends and Java Spring Boot backend microservices. Design REST APIs, integrate external systems, implement CI/CD, troubleshoot production issues, and collaborate with product, UX, QA, and DevOps teams.

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.

Lead UI architecture and design for responsive web applications; build reusable components with Angular/React/Vue and TypeScript/JavaScript; integrate UIs with RESTful microservices; enforce accessibility, security, testing, and CI/CD standards; mentor developers and collaborate with UX, backend, and DevOps teams in Agile environments.

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

Design, develop, test, and architect complex software systems for space and defense applications. Write maintainable code, use Git, participate in code reviews, troubleshoot issues, document processes, stay current with industry trends, and mentor junior engineers while collaborating in Agile teams.

The Software Engineer III will design, develop, and test software for space systems, mentor other engineers, and enhance CI/CD pipelines while ensuring security practices.

Design, develop, test, and maintain enterprise backend services (Java/Spring Boot) and native or cross-platform mobile apps (iOS/Android). Build REST APIs, frontend interfaces, CI/CD pipelines, and ensure security, performance, and production support in an Agile environment.

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.

Build and maintain on-chain smart contracts and backend services for branded USDC-backed stablecoins. Own issuance, reserves, mint/burn, and rewards systems; drive architecture, security, and operational excellence; ship features with product and design partners and ensure well-tested, auditable production deployments.

Design, scope, and implement scalable backend and platform solutions for a reservations and waitlist product. Improve performance and usability, collaborate with Product and Design, identify high-impact opportunities, and contribute across the stack including APIs and front-end integration.

Senior frontend engineer responsible for building responsive, accessible web interfaces using modern HTML/CSS/JavaScript frameworks, consuming RESTful APIs, working in agile teams, and supporting CI/CD and containerization workflows.

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.