Top Software Engineer Jobs in Denver & Boulder, CO

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.

Develop and support full-stack web features across frontend and backend; write maintainable, testable code; design interfaces and documentation; build and troubleshoot AI-enabled features using Python-based AI/agent frameworks; collaborate with cross-functional teams, participate in code reviews, and assist customer-facing teams to resolve technical issues.

The Software Engineer develops dynamic web and software applications for healthcare professionals using C#, ASP.Net, and SQL, ensuring adherence to technical requirements and standards.

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 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.

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.

Build and expand fintech and payment systems using Go, microservices, databases, and cloud technologies. Design production APIs and tooling, diagnose customer issues, manage full release lifecycles, document systems, and mentor engineers. Collaborate with product and business teams while guiding AI agents to produce maintainable, observable, testable code that meets engineering standards. Work independently in a high-availability environment and contribute to next-generation financial products.

Design, develop, and test C++ software for RF processing, radar systems, simulations, and toolchains. Translate algorithm descriptions into software, integrate radar systems with experimental data and analytical tools, optimize performance, and participate in code reviews. Collaborate with cross-functional engineering teams to define requirements and deliver reliable, scalable solutions. The role is performed onsite five days per week and requires an active Secret clearance with eligibility for Top Secret/SCI.

Provides architectural and technical leadership for institutional exchange systems, including matching engines, order management, market data, risk, and unified trading platforms. Leads ultra-low-latency distributed-system design, cross-team technical alignment, reliability standards, incident response, and multi-quarter initiatives. Maintains hands-on engineering contributions while mentoring senior engineers and developing technical leadership across teams.

Design, implement, and maintain partner integration solutions; translate partner requirements into scalable technical implementations; troubleshoot and automate fixes; collaborate with product and engineering teams to improve tools and ensure successful partner onboarding and launches.

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.

Develop and maintain sports trading and tools applications and platforms using .NET, C#, and SQL Server. Build scalable, low-latency, highly available software handling high-volume real-time data. Support existing 24/7 trading systems, perform root-cause analysis, collaborate with product owners and testing teams, contribute to solution proposals and estimates, and mentor technical team members. The role will also expand into Golang, React, and Google Cloud Platform.

Design and build new and existing mission-critical software for aviation and defense, collaborating with cross-functional teams, leveraging modern LLM tools, traveling up to 50%, and working with export-controlled data requiring an active security clearance. Senior hires will focus on high-performance, scalable systems.

Lead technical strategy, build and maintain software systems using AI, mentor early-career engineers, collaborate across disciplines, and protect user privacy and security. The role involves developing scalable systems on AWS and Kubernetes while working with healthcare data and adhering to HIPAA and data-security best practices.

Develop and maintain requirements, architecture, APIs, interfaces, and algorithms for SATCOM mission planning software. Support full software lifecycle in Agile/DevSecOps environments, build backend services, implement CI/CD pipelines, perform code reviews, and translate designs into modern front-end interfaces emphasizing automation, testing, security, and performance.

Design, build, deploy, and maintain resilient, scalable production systems for Toast’s retail customers. The role sets long-term technical architecture and strategy, communicates technical direction, mentors senior engineers, improves engineering productivity, diagnoses performance issues, and drives initiatives amid ambiguity. Engineers collaborate directly with retail customers, visit stores, understand operational workflows, and use AI tools to improve development velocity and quality.

Build and operate high-throughput backend services powering AI agent orchestration, connector integrations, and real-time data pipelines. Design scalable core platform services, collaborate with ML, frontend, and product teams, implement infrastructure-as-code and CI/CD, and mentor junior engineers to deliver reliable, AI-powered features.

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

Design and build reliable backend services and integrations for Coinbase’s Unified Merge Gate. Lead automated code review, policy evaluation, CI evidence, authorization, merge controls, repository migrations, safe rollouts, observability, and operational ownership. Partner with Security, Compliance, Infrastructure, and engineering teams to improve software review and deployment workflows while measuring merge quality, review volume, time-to-merge, and escaped defects.

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.

Leads technical vision and strategy for Affirm’s Marketplace, Search, Ads Platform, and consumer experiences. Designs scalable full-stack platforms, guides architecture and technical excellence, coordinates initiatives across engineering teams, mentors engineers, and drives reliable delivery of customer-focused products across iOS, Android, and Web.

Build and ship end-to-end product features across an author analytics dashboard, marketing site, free tools, billing, email, and AI-assisted functionality. Design data models and APIs, integrate third-party services, develop production LLM features, and maintain testing, monitoring, performance, and observability. The role includes code review, technical documentation, independent product decisions, and close collaboration with the founder in a remote-first environment.

Join an agile team to design, develop, test, and deploy secure enterprise software. Participate in SAFe ceremonies, apply software engineering principles, build automation scripts, promote code reuse, and support the full lifecycle in secure environments.

Architect and re-engineer highly scalable, resilient backend data systems supporting patient services. Lead distributed systems strategy, make architectural decisions, improve performance and reliability, mentor engineers, establish operational practices, and collaborate with product managers and cross-functional stakeholders to shape engineering and product direction.

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.