Top Software Engineer Jobs in Denver & Boulder, CO

Staff Software Engineer responsible for designing scalable distributed systems and full-stack web applications supporting provider acquisition, onboarding, and marketplace supply growth. The role leads cross-team technical initiatives, shapes engineering strategy, mentors developers, and delivers provider-facing products from discovery through post-launch support. Experience with AI-assisted development workflows and technologies such as Node.js, React, TypeScript, Kafka, AWS, Docker, and Kubernetes is valued.

Build and maintain scalable full-stack web applications using PHP, Laravel, React, Next.js, SQL, and related technologies. Own features from design through deployment and monitoring, develop APIs, optimize databases and legacy systems, troubleshoot performance issues, and contribute to code quality, security, and engineering practices. Collaborate cross-functionally in an agile, continuous-deployment environment while using AI-assisted tools responsibly.

Own and expand a Three.js-based in-browser solar configurator: implement and optimize 3D geometry tools and workflows, build product-facing frontend features, collaborate with backend and computational teams, translate solar physics into usable design tools, define frontend/3D architecture, and ensure performant, stable UX across edge cases.

Own and expand a Three.js/R3F in-browser solar configurator: build and optimize 3D geometry tools and UX, collaborate with backend and simulation teams, ensure performant real-time rendering, and deliver frontend product features across the Aether platform.

Build and lead development of high-availability backend services for Affirm’s card loan platform. Design scalable APIs, data models, microservices, and event-driven systems supporting real-time loan attribution, approvals, origination, and refunds. Drive technical strategy, troubleshoot complex performance issues, collaborate with cross-functional teams, and mentor engineers while ensuring long-term system robustness and scalability.

Build and own the technical roadmap: design AI-first interfaces and APIs, architect scalable ETL pipelines, develop data models for ML features, ship autonomous B2B workflows (PO generation, vendor sync, schedule optimizations), and establish engineering standards, CI/CD, and mentoring.

Build and maintain Go-based API endpoints, middleware, gateway services, and platform capabilities. Design API contracts using OpenAPI and gRPC, support authentication, rate limiting, reliability monitoring, alerting, and incident response. Write tested, maintainable code and collaborate with platform teams consuming the APIs. Work in Kubernetes and Docker-based environments while contributing to API consolidation, versioning, observability, and service mesh capabilities.

Build and maintain secure, scalable SaaS healthcare applications using AI coding agents. Translate requirements into specifications and acceptance criteria, review AI-generated code, write tests, troubleshoot defects, and collaborate with senior engineers and cross-functional teams. Apply CI/CD, automation, auditability, infrastructure and policy as code while protecting sensitive healthcare data.

Leads architecture and development of SailPoint’s large-scale, multi-tenant identity security SaaS platform. Translates business strategy into technical roadmaps, designs reliable microservices and infrastructure, drives modernization from monoliths to distributed systems, mentors engineers, reviews designs, delivers code, and communicates technology strategy to executives and stakeholders. The role also requires adoption and oversight of AI-assisted engineering tools and technologies.

Build Doowii’s conversational analytics platform across frontend, backend, data interaction, and infrastructure. Responsibilities include creating data-query interfaces, developing APIs, integrating AI-driven features, optimizing query and storage performance, managing AWS and GCP systems, designing data models, and maintaining ingestion pipelines involving NiFi, Kafka, Iceberg, and BigQuery. The role also involves model evaluation, schema evolution, change data capture, high-throughput streaming, automation, and rapid startup iteration.

Develop and maintain scalable backend infrastructure, data models, APIs, features, and core internal capabilities. Write tested, reliable code; create software testing and validation procedures; resolve customer issues; and design elegant systems with strong observability, SLAs, and scalability. The role primarily focuses on backend engineering while collaborating with application and front-end engineers.

Design and implement cloud-native software and managed services on Kubernetes. Own technical and product innovation, analyze systems, recommend solutions, and enable customers to deploy and integrate cloud-native services. Collaborate with engineering teams in an Agile environment throughout the product lifecycle, including building, testing, deployment, and iteration.

Own post-launch bugs, production issues, and enhancements for AI agents and related products. Investigate root causes across logs, code, conversation data, APIs, authentication, telephony, and integrations; implement and test fixes; support customers directly; guide frontline Support Engineers; and build internal tools that improve investigation and resolution speed.

Lead end-to-end development of modern frontend initiatives using React and Electron. Design scalable architecture, improve performance and test coverage, resolve production issues, influence technical decisions, and collaborate with Product, Design, and Backend teams. The role includes mentoring engineers, maintaining code quality, supporting observability and incident response, and building secure, high-quality customer-facing payment and form workflows.

Develops performant Python software for national defense and remote sensing systems. Responsibilities include designing and deploying features, writing maintainable code, optimizing applications, troubleshooting, and managing containerized deployments with GitLab, Docker, Kubernetes, and Helm. The role is onsite in Boulder four days weekly and requires the ability to obtain an interim DoD Secret clearance.

Develop and deploy performant backend software, primarily in Python, for national defense and remote sensing systems. Collaborate with cross-functional teams, optimize applications, troubleshoot issues, and support Agile development. Use GitLab, Docker, Kubernetes, Helm Charts, and Jira while applying DoD standards and security protocols. The role is on-site four days per week in Boulder, Colorado, and requires the ability to obtain an interim DoD Secret clearance.

Develop and deploy performant Python software for national defense remote-sensing and space-ground systems. Responsibilities include collaborating across teams, writing maintainable code, optimizing applications, troubleshooting, and supporting deployments using GitLab, Docker, Kubernetes, and Helm. The role is onsite four days weekly in Boulder and requires eligibility to obtain an interim DoD Secret clearance, U.S. citizenship, a relevant degree, and 9+ years of software engineering experience.

Own production bugs, escalations, and enhancements for AI agent products. Investigate issues across logs, code, conversation data, telephony, integrations, authentication, APIs, and LLM prompting; implement, test, and ship fixes. Support customers directly, coordinate testing, guide frontline support engineers, build internal investigation tools, and relay feedback to Product while meeting SLAs.

Develop backend software, primarily in Python, for remote sensing and space-ground systems. Responsibilities include designing and deploying features, writing scalable code, managing containerized deployments with Docker, Kubernetes, and Helm, troubleshooting performance issues, using GitLab and Jira, and applying DoD standards. The role is onsite four days per week in Boulder, Colorado, and supports large national defense Agile programs.

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.

Own and develop a TypeScript monorepo spanning Next.js, Expo, and Cloudflare Worker applications. Build PostgreSQL and Prisma data models, webhook and background job systems, secure financial-data and authentication flows, and AI features using LLM tool-calling. Handle production ownership, on-call responsibilities, incident analysis, code review, and reliability improvements. Collaborate remotely with strong written and verbal English while maintaining security, performance, and data integrity.

Build Python backend services and data-intensive systems supporting member identity, eligibility, billing, partner integrations, reporting, and analytics. Design APIs, asynchronous workflows, and data pipelines; validate, reconcile, retry, replay, and recover inconsistent external data. Improve production reliability, observability, testing, and performance while collaborating with Engineering, Product, and Operations. The role offers growth toward independent ownership of services and technical decisions.

Build and scale high-throughput streaming infrastructure that ingests, forwards, and computes on billions of behavioral events in real time. Own projects end to end, solve customer scaling challenges, and influence the technical roadmap. The role focuses on distributed systems capable of processing millions of messages per second with very low latency, supporting real-time personalization and AI-driven marketing products.

Build enterprise control-plane products for managing Hightouch deployments at scale. Responsibilities include developing roles, permissions, and access control; creating change-management tools for evolving data models and warehouses; and helping customers understand and optimize warehouse performance and costs. The role requires backend and distributed-systems architecture, asynchronous workflows, scalability, reliability, product thinking, and engagement with product specifications.

Design, build, and optimize distributed systems powering large-scale data synchronization. Responsibilities include improving sync speed, developing real-time streaming capabilities, scaling high-volume and low-latency systems, troubleshooting customer scaling challenges, and supporting multi-region, multi-cloud infrastructure and data residency requirements. The role involves end-to-end project ownership, customer collaboration, system architecture, and reliability improvements.