Top Software Engineer Jobs in Denver & Boulder, CO

Develop backend tools and systems that improve batch development, testing, workflow efficiency, and reliability. Collaborate with product, infrastructure, design, and analytics teams; break projects into deliverable phases; build scalable, well-tested code; monitor metrics; support system availability and on-call operations; debug code; conduct reviews; and contribute to engineering growth and hiring activities.

Build and improve high-traffic consumer web experiences using React and TypeScript. Contribute to experimentation, client-side tagging, marketing integrations, attribution, measurement, performance, testing, observability, and privacy-aware development. Collaborate with Product, Design, Marketing, Analytics, Data Engineering, and senior engineers. Break down projects, write reliable and extensible code, support operations and on-call efforts, participate in code reviews, and contribute to team growth.

Designs, develops, integrates, and certifies a company-wide digital test procedure application. Responsibilities include full-stack software development, requirements analysis, architecture support, implementation, testing, cross-functional collaboration, Agile development, process improvement, and enterprise application maintenance. The role works on-site at least three days per week and may involve travel between company locations.

Develop and maintain physics-based space and missile defense models, engagement and mission simulations, and analysis tools using Python and C++. Integrate simulations into SIL, HIL, and distributed environments; perform verification, validation, Monte Carlo studies, and data correlation. Collaborate with engineering and government stakeholders on requirements, testing, and technical recommendations. The role requires aerospace or related experience, knowledge of orbital mechanics or missile trajectories, and eligibility for Secret or TS/SCI clearance.

Leads architecture and technical direction for scalable, high-availability software services. Owns complex, multi-team initiatives, makes autonomous technical decisions, partners cross-functionally, mentors engineers, establishes standards, and advocates for quality. The role develops mission-critical systems supporting millions of endpoints and requires deep Java expertise, scalable system design, API development, relational databases, and strong testing practices.

Build and optimize growth systems that increase patient bookings and engagement. Design experiments across messaging, outreach, and in-product booking flows; develop backend systems for experimentation and activation; monitor funnel metrics; analyze drop-offs; prioritize growth opportunities; and collaborate with product, design, data, and operations teams. The role emphasizes rapid experimentation, product-led growth, and measurable improvements in activation, conversion, retention, and booking.

Build and operate full-stack software for the company’s digital thread, including services, APIs, data models, user interfaces, integrations, data migrations, and workflow automation. Write tests, participate in code reviews, monitor production systems, resolve data and user issues, and document technical work. Engineers will progressively own larger features while learning product-data systems and supporting aerospace engineering operations.

Design and implement backend APIs, microservices, and checkout platform components for Affirm’s financial products. Own system health, improve performance and reliability, collaborate across engineering teams, and contribute to technical standards, tooling, and processes. The role requires developing, testing, and shipping high-quality software at scale while making customer-centric technical decisions.

Lead frontend and full-stack architecture across Angular applications, Node.js services, and GraphQL APIs. Design scalable real-time experiences, establish engineering standards, conduct technical reviews, mentor engineers, and ensure quality through testing, CI/CD, and observability. Drive AI-augmented delivery using Claude, GitHub Copilot, agentic workflows, and Spec-Driven Development while collaborating with product, UX, backend, and AI teams.

Develops embedded satellite software and test infrastructure for command and control, mission planning, and data analysis. Performs the full software lifecycle, including requirements, architecture, design, coding, testing, integration, documentation, and support. The role requires experience with software development, cloud and web technologies, object-oriented design, UML modeling, configuration management, and formal development practices. Work is primarily on-site and requires an active TS/SCI clearance.

Develop and maintain embedded satellite software and test infrastructure for command and control, mission planning, and data analysis. Perform full software lifecycle activities, including requirements, architecture, design, coding, testing, integration, documentation, and support. The role requires expertise in modern software technologies, formal development practices, UML modeling, cloud and web development, and an active TS/SCI clearance. Work is fully on-site with potential travel between company and other facilities.

Develop and maintain embedded satellite software and test infrastructure for command and control, mission planning, and data analysis. Perform full software lifecycle activities, including requirements, architecture, design, coding, testing, integration, documentation, and support. Work with cloud, web, database, modeling, simulation, and DevSecOps technologies while collaborating across teams in an on-site environment.

Design, architect, develop, test, and troubleshoot complex flight software for space systems. Write maintainable code, participate in code reviews, document software processes, and use version control. Provide technical leadership and mentorship while making high-level design decisions affecting program cost, schedule, and performance. Work with spacecraft flight software, embedded systems, networking, messaging, and software-in-the-loop and hardware-in-the-loop testing.

Lead the architecture and technical strategy for Affirm’s high-volume observability platform. Design telemetry pipelines and sampling strategies, improve reliability and cost efficiency, integrate observability into AI-assisted development, and drive platform adoption across engineering teams. Remain hands-on while mentoring six engineers, leading cross-functional initiatives, establishing engineering standards, and overseeing monitoring, alerting, on-call operations, and system availability.

Leads software systems engineering for SATCOM mission planning supporting military NC3 networks. Responsibilities include requirements, architecture, API and backend development, user interface implementation, integration, testing, deployment, code reviews, security, performance improvements, mentoring, and Agile DevSecOps delivery. The role requires onsite work in Colorado Springs, active U.S. Secret clearance, U.S. Person status, and up to 10% travel.

Staff Software Engineer responsible for leading design and delivery of large-scale order platform capabilities spanning cloud and point-of-sale systems. The role drives architecture, performance, reliability, API design, code quality, incident response, and technical roadmap alignment. It also requires cross-team collaboration, domain expertise in order processing and synchronization, mentoring engineers, and using AI-assisted development tools to improve productivity.

Drives performance engineering and scalability across software systems by identifying bottlenecks, optimizing code, queries, databases, and architecture, and implementing fixes. Builds performance frameworks, data-generation tools, benchmarks, and CI/CD automation using k6, JavaScript, Grafana, and InfluxDB. Establishes performance standards, investigates distributed systems and cloud environments, documents architectural decisions, and collaborates with engineering teams to improve throughput, latency, reliability, and efficiency.

Owns company-critical, long-term technical problems across multiple teams and organizations. Defines technical strategy, architectures, roadmaps, and engineering standards for large-scale customer-facing systems. Remains hands-on in software development while driving AI adoption in products and engineering workflows. Partners with senior product, engineering, and executive leaders to resolve complex problems, improve reliability and performance, and shape Dropbox’s technical direction.

Lead frontend technical strategy for Affirm’s checkout decision orchestration systems. Design and architect scalable web applications, guide major technical initiatives, improve reliability and operational processes, establish engineering quality standards, collaborate with product, design, and analytics, and mentor engineers. The role focuses on building fast, clear, and reliable checkout experiences using modern declarative UI frameworks.

Leads technical direction for scalable, secure, resilient software platforms while remaining hands-on with architecture, implementation, prototyping, debugging, and complex engineering problems. Modernizes legacy systems toward cloud-native, API-first, and AI-enabled architectures; establishes engineering standards; improves automation, testing, observability, and developer productivity; and mentors senior technical leaders across teams.

Designs, develops, tests, and debugs systems software, storage firmware, operating-system components, and platform interfaces. Leads software engineering projects, creates test plans and documentation, resolves integration issues, collaborates with internal and outsourced teams, and mentors less-experienced engineers. The role requires expertise in Python and shell scripting, firmware validation, PCIe, NTB, NVMe, networking, Linux, Windows, and VMware environments.

Develop and configure IBM TRIRIGA solutions for facilities and real property management. Translate stakeholder requirements into functional designs, workflows, test cases, and implementation plans. Collaborate with business sponsors, end users, maintenance technicians, and technical teams on solution design, troubleshooting, effort estimation, testing, documentation, and delivery. Work independently in cloud environments while supporting federal and commercial clients remotely.

Develop and maintain simulation scenarios, analytical tools, and applications for mission-critical aerospace defense systems. Analyze requirements, create scientific and mathematical models, develop modular GUI-based tools, and perform data analysis and validation. Participate in agile ceremonies, decompose requirements, write and execute test cases, document technical results, and brief stakeholders. The role also coordinates installations, interfaces with government and vendor teams, and guides junior and mid-level engineers.

Develop and maintain frontend and full-stack product solutions, owning features from design through implementation. Collaborate with stakeholders, product owners, UX teams, and engineers; contribute to technical design, estimation, testing, debugging, documentation, and code reviews. Improve engineering productivity and code quality, mentor junior team members, and build scalable, consumer-facing products using React, Next.js, APIs, ORM technologies, Storybook, and cloud platforms.

Designs, develops, tests, documents, and supports software applications, including React Native mobile apps for iOS and Android. Collaborates with business owners, IT, QA, architects, and leadership on system design, coding standards, releases, and troubleshooting. Participates in Agile ceremonies as a scrum master, demonstrates products, trains users, mentors junior engineers, and evaluates AI-assisted development tools while validating their security, privacy, quality, and accuracy.