Top Principal Software Engineer Jobs in Denver & Boulder, CO

Lead platform engineering for CloudBees by defining the technical roadmap, writing critical production code, improving system stability and performance, and guiding engineering teams. Build and operate Go-based microservices on AWS, establish testing and release practices, drive observability, conduct design and code reviews, and document architecture decisions. The role requires deep distributed-systems expertise, ownership of complex platforms, and hands-on principal-level contribution.

Principal Software Engineer responsible for cross-cutting architecture, technical roadmap direction, and delivery quality. The role involves developing APIs, databases, UIs, and libraries with C# or JavaScript/TypeScript; guiding AI-assisted development; establishing testing and verification practices; mentoring engineers; improving tooling and workflows; collaborating cross-functionally; estimating work; and participating in on-call support. The position is fully remote with occasional travel.

Lead software quality assurance for aerospace and defense mission ground systems across development, operations, maintenance, and sustainment. Perform baseline audits, release approvals, compliance assessments, verification and validation oversight, anomaly tracking, process improvement, and mission procedure reviews. Support customer and program reviews, Agile ceremonies, software assurance planning, configuration management, vulnerability identification, and lifecycle compliance. Mentor QA peers and coordinate with engineering, operations, mission assurance, configuration management, and program teams.

Leads software quality assurance for space mission ground systems throughout development, operations, maintenance, and sustainment. Responsibilities include release approvals, baseline audits, configuration management, verification and validation oversight, anomaly tracking, process compliance, mission procedure reviews, customer and program meetings, vulnerability identification, assurance planning, and mentoring QA personnel. The role supports aerospace and defense programs using Agile and Waterfall processes and requires coordination with engineering, operations, configuration management, and program leadership.

Leads software quality assurance for aerospace and defense mission systems across development, operations, maintenance, and sustainment. Responsibilities include software audits, release approvals, configuration management, verification and validation oversight, anomaly tracking, process compliance, mission procedure reviews, customer and program meetings, vulnerability identification, assurance planning, and mentoring QA peers. The role supports ground systems, payloads, spacecraft buses, simulators, and operational software while ensuring compliance with contractual, industry, and government standards.

Leads technical direction for the Partner Services engineering area while remaining hands-on with mission-critical financial systems. Owns architecture roadmaps, ADRs, observability, reliability, security, technical investment, OKRs, and KPIs across multiple teams. Leads major incidents, drives AI-native engineering practices, partners with product and executive stakeholders, participates in architecture governance, and mentors engineers at every level. The role requires strong payments or banking familiarity, executive communication, and extensive technical leadership experience.

Leads technical strategy and architecture for a multi-team billing engineering workstream supporting payments, banking, treasury, and financial settlement. Remains hands-on while owning architecture roadmaps, ADRs, reliability, observability, security, AI-native engineering practices, technical investment, and business outcomes. The role partners with senior engineering and product leaders, manages high-stakes incidents, strengthens engineering maturity, and mentors engineers at every level.

Provides technical leadership for Azure SQL databases supporting a highly available Azure service. Responsibilities include database performance tuning, reliability and capacity planning, schema changes, data migrations, observability, incident response, root cause analysis, operational automation, and technical strategy. The role partners with software engineers, SREs, and architects to improve scalability, durability, cost efficiency, and long-term service reliability across teams.

Provides hands-on technical direction and architecture ownership for connected products and cloud platforms. Defines target architecture, APIs, data models, integration patterns, and technical roadmaps; guides device-to-cloud systems, platform modernization, security, reliability, observability, CI/CD, and incident response. Partners across engineering, product, science, quality, IT, DevOps, and external vendors. Remains involved in backend implementation, technical investigations, code reviews, mentoring, and resolving high-risk production issues.

Lead technical direction and major multi-team projects for Chainguard Containers. Design and operate secure container build pipelines, registries, distribution systems, and adoption tooling. Remain hands-on with Go development, architecture, code review, observability, and on-call operations. Form roadmaps with product and engineering leaders, make product-level trade-offs, mentor senior engineers, collaborate across teams, contribute to open-source and industry standards, and establish safe AI-assisted engineering practices.

Provides senior technical leadership across engineering teams by shaping architecture, guiding complex software development, mentoring engineers, and driving scalable, secure, and reliable solutions. Responsibilities include hands-on coding, design reviews, API and system architecture, CI/CD and tooling improvements, cross-team technical alignment, project leadership, and partnership with product and design stakeholders. The role is remote with quarterly travel to Tampa, Florida.

Provides principal-level technical leadership across engineering teams, shaping architecture, engineering standards, scalable software solutions, and delivery practices. The role combines hands-on software development with design reviews, technical decision-making, mentoring, CI/CD and platform improvements, system reliability, and cross-team collaboration. It also partners with product and design stakeholders and may lead high-impact initiatives. Remote work is available with required quarterly travel to Tampa, Florida.

Leads the technical vision, architecture, and execution of AI performance, framework, benchmarking, and developer-productivity initiatives. Drives cross-team architecture, resolves complex systems trade-offs, mentors technical leaders, and contributes hands-on through prototyping, implementation, reviews, debugging, observability, and automation. Delivers measurable improvements in model onboarding speed, runtime performance, reliability, hardware utilization, and Azure capacity efficiency across models, frameworks, compilers, runtimes, systems, services, and hardware.

Develops, tests, documents, maintains, and enhances software solutions using Appian and related technologies. Integrates Appian with external systems and services, resolves technical problems, remediates security vulnerabilities, improves performance, and participates in planning and user-story analysis. The role follows software development processes, documents standards, and mentors engineers while helping prioritize work for a development team.

Lead technical direction for Elastic’s billing experience platform. Design and evolve public and internal APIs, build full-stack billing and account-management features, and shape scalable architecture and data models. Improve reliability, observability, deployment, CI/CD, and incident response across cloud services. Mentor engineers, review technical work, influence roadmap priorities, collaborate across Product, Design, SRE, Finance, and Cloud teams, and participate in on-call rotations.

Designs, develops, configures, and supports Edifecs healthcare EDI solutions and transaction mappings. Works with 837, 834, 835, 820, and 270/271 transactions; troubleshoots transmissions, configures validations, and develops Groovy scripts. Leads Agile and DevOps efforts, mentors engineers, supports QA, and designs scalable AWS applications using containers, microservices, and CI/CD. Provides technical leadership, architecture guidance, performance tuning, and stakeholder consultation.

Develop and maintain scalable customer-facing full-stack applications using Java, Spring Boot, Angular, REST APIs, and cloud technologies. Design software, automate testing, deploy applications, and support CI/CD pipelines. Collaborate with architecture, UX, and product teams in an Agile environment. Mentor junior engineers, conduct code reviews, improve development practices, and translate business requirements into technical solutions.

Develop and maintain Java software for the distributed C2BMC Global missile defense system. Responsibilities include software design, coding, testing, debugging, performance analysis, integration, documentation, automation, and technical support. The role collaborates with systems engineering, cyber, operations, and test teams, troubleshoots complex issues, and contributes to continuous improvement. It requires onsite work in Colorado Springs, an active Top Secret clearance, and eligibility for SCI access.

Own the architecture and technical direction of NodeZero’s database platform. Design scalable PostgreSQL systems, multi-tenant data models, graph-based asset models, partitioning, replication, and zero-downtime schema migrations. Establish database standards, governance, and performance practices while writing production code, authoring design documents, mentoring engineers, and influencing teams across the data pipeline.

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.

Develop and maintain embedded flight software for spacecraft, including applications, hardware drivers, unit tests, and hardware-in-the-loop validation. Define and validate requirements with systems and embedded engineers, review code, participate in design reviews, and support on-orbit flight operations. The role requires expertise in Rust, C++, C, RTOS or Embedded Linux, spacecraft sensors and actuators, and leadership of junior developers.

Leads the design and development of scalable SaaS applications, including AI-powered features such as semantic search, vector databases, RAG, and LLM orchestration. Provides technical leadership, mentorship, architectural guidance, code reviews, and engineering standards enforcement. Collaborates cross-functionally to translate requirements into robust solutions, champions AI-assisted development tools, builds developer experience tooling, and drives innovation, quality, security, and continuous improvement across the engineering organization.

Leads the design, implementation, integration, and optimization of global enterprise Finance solutions. Responsibilities include ERP solution leadership, Finance process transformation, system integration, data migration, reconciliation, testing, quality governance, deployment readiness, and post-production stabilization. The role also identifies AI automation opportunities and develops governed AI-enabled solutions across ERP, data, API, and workflow platforms while advising Finance, Product, Architecture, and Engineering stakeholders.

Design, build, and operate resilient AWS cloud infrastructure, Kubernetes platforms, CI/CD pipelines, and infrastructure-as-code modules in a regulated medical-device environment. Improve security, scalability, performance, cost efficiency, deployments, and operational support. Collaborate with Engineering, QA, IT, and Security teams while troubleshooting distributed systems and providing technical leadership across global teams.