Top Staff Software Engineer Jobs in Denver & Boulder, CO

Lead backend engineering strategy for Affirm’s search and recommendation platform. Design and launch highly available distributed systems, guide technical architecture and execution, improve team operations and reliability, establish engineering quality standards, collaborate with product, design, and analytics, and mentor engineers. The role focuses on search, recommendations, consumer shopping experiences, monetization, and scalable platform foundations.

Own and develop Gusto’s PeopleOS internal HR platform, integrations, and AI-powered tooling. Build full-stack software, REST API integrations, MCP servers, and Claude-based workflows across Workday, Greenhouse, Slack, Google Workspace, and other systems. Partner with People Operations stakeholders on design, implementation, testing, documentation, releases, troubleshooting, and user feedback. Handle sensitive HR data while delivering reliable employee-facing tools.

Lead backend engineering strategy for Affirm’s international Identity team. Design and launch highly available distributed systems supporting KYC, user lifecycle management, and identity decisioning. Drive technical planning, cross-functional collaboration, operational excellence, monitoring, testing, and on-call readiness. Establish engineering quality standards, influence architecture, mentor team members, and deliver scalable systems using Python or Kotlin, AWS, MySQL, Spark, and Kubernetes.

Lead the technical vision and architectural evolution of Huntress’s Core Platform. Build complex Ruby on Rails features, solve scaling challenges, manage cross-team dependencies, drive architectural decisions, and oversee system lifecycle and technical risk. Mentor engineers, establish engineering excellence, collaborate with managers and product leaders, and help teams adopt AI coding tools responsibly.

Design, build, and operate enterprise applications, APIs, integrations, and distributed event-driven systems using C#/.NET, React, cloud platforms, and messaging technologies. Integrate business systems, implement resilient architectural patterns, add AI capabilities, and support CI/CD, observability, security, and production troubleshooting. Collaborate with stakeholders and engineers, contribute to technical standards, lead projects when needed, and deliver reliable solutions across engineering, manufacturing, supply chain, and finance functions.

Design and implement scalable, secure, high-performance software systems and public-facing APIs. Lead system design, apply agentic coding workflows, collaborate with Product and Data Science, mentor engineers, and own initiatives improving efficiency, performance, and customer satisfaction. The role requires extensive experience with highly available distributed systems, API versioning and rate limiting, modern backend and frontend technologies, AWS, and Domain-Driven Design.

Designs and maintains automated QA frameworks for OTT and digital media applications. Develops Playwright-based UI, end-to-end, API, functional, regression, and performance testing; integrates automation into CI/CD pipelines; manages cloud testing infrastructure; analyzes defects and quality metrics; supports release decisions; and provides technical guidance to QA teams. The role also applies AI-assisted testing and machine learning to improve test generation, analysis, prioritization, and defect triage.

Lead development, maintenance, and optimization of high-volume billing platforms supporting revenue operations. Architect AI and machine learning solutions to automate billing workflows, prototype scalable capabilities with product and engineering partners, and eliminate operational bottlenecks through automation and deployment pipelines. Establish engineering standards, conduct architectural reviews, and build observable, secure, PCI-compliant microservices and distributed systems.

Design and scale a feature flagging and A/B testing platform, including high-throughput event ingestion, warehouse-native analytics, real-time feature flag delivery, multi-database SQL support, and distributed systems infrastructure. The role involves full-stack development, architecture, performance optimization, reliability engineering, and technical product influence within a remote startup team.

Lead the architecture and delivery of TeamSnap’s Android advertising platform, including native, display, and video ad experiences. Build privacy-conscious consent and measurement capabilities, optimize performance, shape Kotlin and Jetpack Compose architecture, and lead cross-team technical initiatives. Partner with advertising, product, design, legal, and data teams while mentoring engineers and establishing Android standards.

Build and lead data catalog infrastructure supporting data discovery, metadata management, governance, quality, lineage, privacy, access control, and retention. Develop scalable metadata integrations, onboarding tools, data policies, and end-to-end lineage products across online, offline, machine learning, metrics, visualization, and third-party datasets. Collaborate with cross-functional infrastructure teams to ensure Airbnb data assets are cataloged, discoverable, governed, and compliant with regulatory requirements.

Leads architecture, implementation, testing, and delivery of major customer-facing software systems spanning multiple teams. Makes complex technical decisions, drives code and design reviews, ensures quality and integration, collaborates with product and UX, mentors engineers, and shapes company-wide technical direction. Builds scalable distributed systems, APIs, cloud infrastructure, and third-party integrations while simplifying ambiguous problems and delivering reliable customer experiences.

Lead the architecture, implementation, testing, and delivery of scalable customer-facing software systems spanning multiple teams. Make technical decisions, drive design and code reviews, integrate third-party SaaS platforms, improve system quality and performance, collaborate with product and UX teams, mentor engineers, and shape company-wide technical objectives.

Lead the architecture, development, operation, and evolution of PlayStation’s real-time analytics platform. Build scalable distributed data systems using streaming and OLAP technologies, integrate batch and streaming workloads, improve reliability and performance, and develop AI-powered engineering capabilities. The role provides technical leadership across teams, mentors engineers, drives architecture and standards, resolves production incidents, and participates in on-call support.

Lead architectural vision and delivery for complex, scalable SaaS systems. Design cloud-native distributed systems using Docker and Kubernetes, develop foundational abstractions, reduce technical debt, and drive engineering best practices. Partner with Product, Design, and Engineering leadership, mentor senior engineers, and contribute to hiring. Apply deep C# and .NET expertise, performance analysis, debugging, and AI-assisted development, including production LLM integrations.

Leads technical direction for large-scale accessibility systems that detect, remediate, and prevent web accessibility issues. Designs, builds, and operates secure, scalable distributed systems; drives technical roadmaps; mentors engineers; partners with Product and Design; and promotes responsible AI-assisted development. The role requires hands-on software engineering across JavaScript/TypeScript, React, Node.js, databases, storage, real-time data, and AI-enabled tooling.

Design and scale Cohere’s Model Vault backend and inference platform. Lead architecture for authentication, deployments, billing, metering, customer lifecycle, and cloud control-plane services. Build reliable distributed systems with strong guarantees for security, privacy, consistency, isolation, observability, and failure recovery. Drive technically complex initiatives from threat modeling and architecture through implementation, production rollout, operations, and iteration at enterprise scale.

Design, build, and operate scalable backend services and APIs. Develop integrations, shared data APIs, metrics storage, ETL pipelines, and AI-enabled product features. Diagnose reliability and performance issues, improve developer experience, and advance engineering practices. Collaborate with engineers, clients, and non-technical stakeholders while working effectively in a fast-changing startup environment.

Own and design high-impact components of Chainguard's container image platform. Build and improve image build systems, tooling, and services at scale. Drive technical direction, participate in roadmap planning, collaborate cross-functionally, and mentor engineers to raise engineering quality.

Build and operate full-stack billing systems for a cloud-based clinical platform. Responsibilities include balancing insurance and patient financial transactions, handling inconsistent partner data, developing reliable LLM-powered features, improving a mature codebase, supporting production issues, and collaborating with product and design. The role owns features from scoping through deployment, monitoring, and customer feedback, while contributing to technical direction and resolving complex billing-domain problems.

Leads technical direction and cross-team delivery of scalable software capabilities for a digital banking platform. Designs secure APIs, microservices, integrations, data contracts, and reliable full-stack systems. Partners across product, design, security, architecture, data, and engineering; mentors engineers; leads incident response; improves testing, CI/CD, developer tooling, and operational readiness. The role requires hands-on coding, architecture leadership, dependency management, and influence without direct people management.

Lead software engineering for the Patient Onboarding team, building and improving registration, insurance verification, and care-access workflows. Write full-stack production code, lead complex cross-team initiatives, shape technical direction, improve engineering foundations, and support modern AI-enabled development practices. Collaborate with Product, Design, Analytics, and Engineering to improve patient conversion and system reliability.

Owns end-to-end development of customer platform features, including Go backend systems, REST/gRPC APIs, entitlements, policies, and onboarding services. Collaborates across engineering teams, extends AI-powered customer experiences, provides technical leadership and mentorship, and drives product-focused delivery in ambiguous environments.

Develop and deploy onboard swarm autonomy: perception, planning, control, multi-target tracking, inter-robot/C2 protocols, on-vehicle software integration, realistic UxS simulation, train and test ML-based target recognition, and electronics prototyping. Travel for test events up to 25%.

Designs, builds, and scales backend services and integrations for payments, billing, identity, and partner connectivity. Sets technical vision and architecture for distributed systems, leads cross-team delivery, manages production rollouts, builds fault-tolerant services and data pipelines, and mentors engineers. The role partners with product, design, and engineering teams to deliver frequent, reliable improvements for Flex’s rent payment platform.