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

Develop and maintain satellite command-and-control, mission-planning, mission-data processing, and data-analysis software using Elixir. Collaborate on architecture, design, and code reviews while working across engineering disciplines. The role requires functional programming, resilient and fault-tolerant distributed systems, front-end development, live-system debugging, and strong communication. Preferred experience includes Elixir OTP, React, TypeScript, OAuth2, network protocols, databases, and distributed-system monitoring.

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.

Provides technical leadership on complex, high-impact engineering projects from design through launch. The role involves architecture, company-wide initiatives, engineering excellence, mentoring technical leaders, and establishing standards for scalable, reliable, secure, observable systems. The engineer will collaborate across teams, communicate complex technical topics, and apply customer-focused decision-making and A/B testing techniques.

Develop and ship phased software projects for Affirm’s mobile card acquisition team. Collaborate with product, design, and analytics stakeholders; build web and mobile applications and scalable APIs; monitor operational metrics; support availability and on-call efforts; participate in code reviews, interviews, and team development.

Develop and launch scalable full-stack search systems using JavaScript, TypeScript, Python, or Kotlin. Collaborate with engineers and stakeholders, balance delivery speed with system reliability, debug code, participate in code reviews, write tested and extensible software, and contribute to team growth and communication.

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 launch scalable fullstack web applications and APIs for Affirm’s Ads Platform. Collaborate with product, design, analytics, and engineering partners to break projects into deliverable phases, make technical trade-offs, write tested and extensible code, monitor service metrics, support on-call operations, review code, and participate in team development and interviews.

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.

Lead the architecture and delivery of GitLab’s data products, including near-real-time data ingestion, knowledge graph integrations, data marketplaces, observability, and data-sharing APIs. Translate ambiguous 0-to-1 initiatives into roadmaps, resolve cross-team dependencies, ensure operational readiness across deployment surfaces, and mentor engineers. The role requires deep full-stack expertise, technical leadership, and experience with AI-powered orchestration and multi-tenant SaaS systems.

Develop and support software, automation tools, dashboards, and alarms for cloud infrastructure, cost attribution, and cloud efficiency. Collaborate with cross-functional teams and senior engineers to design reliable systems, APIs, databases, tests, and AI agents. Contribute to architecture and automation strategies while maintaining strong security, communication, and delivery practices.

Design, build, and ship scalable full-stack applications and services. Develop Java and Spring Boot APIs and microservices, build React interfaces, manage NoSQL data, and contribute to architecture decisions. Use AI coding assistants responsibly, participate in code reviews, mentor junior engineers, and uphold testing and documentation standards. Collaborate with product, design, QA, and DevOps teams to deliver reliable releases.

Designs, builds, and ships scalable full-stack applications and services. Responsibilities include developing Java and Spring Boot APIs and microservices, building React interfaces, managing NoSQL data, contributing to architecture, using AI coding assistants, reviewing code, mentoring engineers, and partnering with product, design, QA, and DevOps teams.

Develop and maintain full-stack applications for veterinary and business-critical systems. Responsibilities include frontend development, backend services, APIs, database interactions, integrations, troubleshooting, testing, and Agile delivery. The role collaborates with Product and Engineering teams to translate requirements into scalable technical solutions, owns development tasks, and contributes throughout the software development lifecycle.

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.

Develop and maintain enterprise and SaaS applications across frontend and backend layers. Build React interfaces, Java Spring Boot services, REST APIs, databases, authentication controls, and automated tests. Troubleshoot performance and security issues, participate in code reviews, and collaborate with technical and business stakeholders. The remote role includes approximately 5% travel and requires Public Trust eligibility and U.S. citizenship.

Build and review full-stack software environments for AI training. Develop frontend and backend features, integrate APIs, debug issues across UI and data layers, improve code quality, document technical reasoning, and review peer submissions. The role requires frontend and backend development experience with frameworks such as React or Angular and stacks including Node.js, Python, Java, or Go. Prior AI experience is not required.

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 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.

Develop secure, scalable full-stack applications using Java, Spring Boot, microservices, REST APIs, AWS, Docker, and Kubernetes, while leading Angular frontend architecture and development. Build responsive interfaces with Angular, TypeScript, NgRx, RxJS, and Angular Material. Contribute across the software development lifecycle, including design, testing, automation, troubleshooting, and deployment. The role requires enterprise architecture experience, Agile collaboration, and mandatory fraud prevention domain expertise.