Top Senior Full-Stack Engineer Jobs in Denver & Boulder, CO

Develop and operate CrowdStrike’s internal cloud management platform and mission-critical CI/CD pipelines. Build APIs and UIs using Go and TypeScript, improve developer productivity, integrate tooling, maintain cloud-native infrastructure, and support secure, highly available software delivery systems. Collaborate with development, infrastructure, security, and SRE teams, ensure SOC2-aware processes, and participate in on-call operations.

The Senior Full-Stack Engineer will manage client relationships, design integration solutions, and ensure seamless delivery and optimization of technical workflows, while leveraging AI for efficiency.

Build and ship full-stack web and mobile experiences across Affirm’s consumer products. Break down projects, collaborate with product, design, and analytics teams, develop scalable APIs, write well-tested code, monitor service health, participate in on-call support, review code, and contribute to engineering growth and interviewing.

Lead design and delivery of full-stack basketball scoring, statistics, and postgame features. Build scalable backend services and APIs with TypeScript and Node.js, develop React web experiences, support iOS and Android products, and make architectural decisions. Collaborate across product, design, and engineering teams, ensure code quality and system reliability, mentor peers, and contribute to technical standards and tools.

Build enterprise workforce management software for forecasting, capacity planning, scheduling, adherence, intraday management, and reporting. Develop Java and Spring Boot microservices, React and TypeScript applications, REST APIs, event-driven workflows, integrations, and PostgreSQL data models. Support cloud-native deployments, CI/CD, testing, performance optimization, production troubleshooting, and technical design. Collaborate with product, operations research, QA, DevOps, UX, and client stakeholders.

Build and scale Airbnb’s AirChatUI AI prototyping harness and native macOS/iOS applications. Lead architecture and implementation across web prototyping, iOS deployment, AI agent integrations, AirChat tooling, and Kyber platform integration. Develop declarative UI features, collaborate with infrastructure, product, security, and design teams, and establish scalable iOS patterns. Enable designers and product managers to create production-oriented prototypes while maintaining quality, accessibility, performance, availability, and release standards.

Build and scale Euler’s AI-native PRM platform across the front end and back end. Develop React and Next.js applications, Python and Node.js services, CRM and partner-tool integrations, AWS and Cloudflare microservices, REST APIs, and deployment workflows. Collaborate with engineering and AI teams, apply secure coding practices, maintain CI/CD pipelines, and ship scalable features while working US East Coast hours.

Build and maintain scalable full-stack healthcare software using React, TypeScript, Java, Spring Boot, and Python AI/ML services. Develop production LLM-based agentic applications, contribute to architecture and cloud infrastructure, improve CI/CD pipelines, review designs and code, mentor engineers, define testing standards, and collaborate with product and design teams on intuitive healthcare workflows.

Build backend-focused Java/Kotlin APIs and data-driven product features, while contributing to React dashboards and workflows. Design scalable systems, participate in architecture and code reviews, troubleshoot production issues using observability tools, and collaborate with data, reporting, design, and product teams to launch emerging products.

Develop scalable full-stack applications and services for millions of users, with a backend focus. Design APIs, event-driven systems, and database solutions; collaborate with product, UX, and engineering teams; promote automated testing, reliability, code quality, and incident management. Participate in on-call responsibilities, pair programming, technical mentoring, and evaluation of new technologies.

Develop and support a production full-stack platform for alternative investment managers. Responsibilities include building frontend features, backend services, APIs, data-ingestion workflows, validation, scheduled jobs, SQL queries, database migrations, audit trails, access controls, automated tests, and production issue resolution. The role also involves code reviews, releases, technical documentation, and coordination with technical and DevOps teams on deployments and upgrades.

Own architecture and implementation across React, Node.js, and Web3 integrations. Build decentralized applications, integrate wallets, DeFi protocols, blockchain data, and third-party APIs, and scale real-time data infrastructure. Lead features from design through deployment and production support while improving performance, security, reliability, and interoperability. Work independently in a demanding startup environment with substantial technical ownership.

Build and optimize growth and retention features across a TypeScript backend and React frontend. Ship feature-flagged experiments, instrument patient journeys, analyze results, improve performance and accessibility, and maintain a high-quality consumer experience. Collaborate with product and design, review code, mentor engineers, and resolve patient experience incidents. The role is fully remote and supports a digital health platform.

Designs and develops complex full-stack software systems using Java, JavaScript, Angular, Spring Boot, AWS, and related technologies. Provides technical leadership, mentorship, code reviews, and innovation while collaborating with business partners, architects, analysts, engineers, and technical leads. Translates business logic into technical requirements, works in an Agile Scrum environment, and creates developer-facing technologies and documentation.

Lead architecture and full-stack development for greenfield products and major system changes. Design scalable APIs, UIs, integration services, and durable workflows; integrate SaaS systems, third-party applications, and production LLM capabilities. Document architectural decisions, ensure maintainable code, troubleshoot integrations, improve observability and automation, and mentor teams while driving scalable improvements in delivery and quality.

Own and develop a TypeScript monorepo spanning Next.js, Expo, and Cloudflare Worker applications. Build secure PostgreSQL and Prisma systems, webhook handlers, background jobs, authentication, encrypted financial data workflows, and AI-powered financial features. Responsibilities include production ownership, incident response, code review, and ensuring reliability, security, idempotency, and data isolation across web and mobile products.

Design and maintain scalable full-stack software solutions using Python and Pandas. Develop data infrastructure, integrate technologies, optimize application performance, and collaborate cross-functionally to deliver reliable products. The role requires strong AWS and scalable architecture expertise, with a focus on continuous improvement and customer impact.

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.

Build and maintain Alpaca Connect developer-platform experiences using TypeScript, React, and Go. Improve onboarding, app management, compliance review, publishing, consent, and permissions workflows. Design APIs and integrations with identity, account, trading, and market-data systems while creating secure, auditable self-service tools. Own features from design through production and collaborate with Product, Design, Compliance, Support, Partnerships, and Platform teams.

The Senior Fullstack Software Engineer will design, implement, and maintain features for Conveyor's SaaS platform, involving both backend and frontend work, while collaborating closely with team members and mentoring juniors.

Design, build, and maintain AI-powered B2B SaaS products across frontend, backend, and AI. Own projects end-to-end, collaborate with product and design, ensure maintainability, mentor teammates, and inform roadmap and implementation decisions.

Develop and maintain Java applications, RESTful services, and Angular frontends using Spring Boot and NgRx. Deploy applications to cloud platforms, practice TDD, manage CI/CD with Jenkins, and work with Oracle and PostgreSQL databases. Participate in agile processes, collaborate with cross-functional teams, mentor engineers, and independently lead technical initiatives and feature delivery.

Lead the design, development, and implementation of resilient pricing tools using Python and cloud technologies. Improve automation, deployment reliability, testing, documentation, and technical standards. Coordinate complex projects, research new development practices, identify technical blockers, and mentor junior developers. Collaborate with stakeholders while developing expertise in insurance pricing and supporting applications built with technologies such as Streamlit, Flask, Docker, Kubernetes, and cloud compute.

Deploys, configures, integrates, and operates Databricks and enterprise cloud data infrastructure for HUD. Automates infrastructure through IaC, scripting, APIs, and CI/CD; configures security, identity, access, compute, storage, and Unity Catalog. Supports data pipelines and Databricks applications, troubleshoots platform and integration issues, documents procedures, collaborates with cloud, cybersecurity, DevSecOps, and application teams, and provides technical leadership.

Senior full-stack engineer responsible for owning mission-critical software from requirements through deployment and sustainment. The role involves working directly with government users and technical stakeholders, architecting and building products across the stack, integrating with government IT systems, and ensuring security and compliance within DoD environments. The engineer will make product and architectural decisions, support technical proposal artifacts, and travel up to 50% to engage with mission owners in the field.