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

Develop and sustain full-stack web applications, backend services, RESTful APIs, and data analytics capabilities for a large-scale government platform. Build interactive dashboards, visualizations, search tools, and analytical workflows integrating complex datasets, models, and data services. Collaborate with data scientists, engineers, analysts, and government stakeholders while supporting testing, CI/CD, deployment, troubleshooting, performance optimization, and secure software development.

Develop and operate a large-scale internal cloud management platform. Build APIs, UIs, CI/CD pipelines, and developer productivity tools using Go and TypeScript. Maintain Temporal and Argo Workflows pipelines, integrate development tooling, improve SDLC efficiency, support SOC 2 compliance, and collaborate with engineering, security, infrastructure, and SRE teams. Participate in on-call operations and apply AI technologies to improve workflows and decision-making.

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.

Leads software teams developing, integrating, deploying, and maintaining full-stack mission applications for DoD and intelligence customers. Builds prototypes, scales applications, develops responsive frontend features, integrates systems, collaborates with government operators, and conducts deployment and field testing in secure environments. The role requires customer relationship management, technical leadership, software engineering expertise, and active security clearance.

Lead technical strategy and execution for Affirm’s account management team, building secure, scalable fullstack systems and customer account security experiences. Collaborate with product, design, analytics, and engineering teams; establish quality, monitoring, testing, and operational standards; support availability and on-call practices; communicate technical decisions; and mentor engineers.

Leads full-stack software teams developing, integrating, deploying, and maintaining mission-critical applications for DoD and intelligence customers. Builds prototypes and user-focused features, integrates systems and APIs, collaborates with military and government operators, and conducts deployment, field testing, and triage in secure environments. Requires expertise in React, TypeScript, Python, high-performance interfaces, secure software deployment, customer engagement, and national security missions.

Develop and maintain a full-stack web application and platform for fraud analysis. Build APIs and user interfaces, write automated tests, troubleshoot production issues, collaborate with product, design, data science, infrastructure, and solutions engineering teams, and participate in on-call support. Use React, Golang, Python, PostgreSQL, Docker, and AWS technologies to deliver reliable products and meet service-level requirements.

Develop and maintain a fraud-analysis web application and platform. Build APIs and user interfaces, write automated tests, troubleshoot production issues, collaborate with product and cross-functional teams, analyze product metrics, and support SLA compliance through production on-call rotation.

Build and maintain fullstack features for GitLab’s post-purchase subscription lifecycle, including renewals, billing accounts, auto-renewal, overages, reconciliations, and subscription visibility. Partner with Product and Design, integrate billing and customer systems, write reliable tested code, support safe rollouts and monitoring, participate in code reviews and incident response, and reduce technical debt and architectural risk.

Develop and maintain full-stack data analytics applications, interactive dashboards, visualization tools, backend services, RESTful APIs, and database integrations. Integrate data sources, analytical models, and processing services into secure, scalable user-facing applications. Collaborate with data scientists, engineers, analysts, and government stakeholders while supporting testing, troubleshooting, performance optimization, CI/CD, and deployment activities.

Build and maintain scalable backend platforms for capital orchestration, transaction reconciliation, collateral movement, data pipelines, and business workflows. Collaborate with engineers, product managers, designers, analysts, and business stakeholders to design systems, write tested code, improve reliability, and deliver projects incrementally. Support production operations through monitoring, metrics, debugging, code reviews, and on-call responsibilities.

Staff Software Engineer responsible for technical strategy, scalable full-stack systems, team operations, reliability, monitoring, code quality, and talent development. The role involves building customer-facing card experiences and backend services using Python or Kotlin, AWS, MySQL, Spark, Kubernetes, and React-based frameworks. The engineer will own features end to end, collaborate cross-functionally, manage technical risks and trade-offs, support on-call health, and apply AI safely to improve development and customer experiences.

Build and ship custom full-stack programs for AI labs and product teams, including capture flows, task logic, data pipelines, validation, redaction, provenance, and delivery across web, mobile, and backend systems. Partner directly with technical customers to scope ambiguous requirements, determine what to reuse or build, ship production code, establish data quality processes, and turn repeatable custom solutions into core platform capabilities.

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.

Build and maintain enterprise software tools for Apple device management. Collaborate with experienced engineers, product managers, and leadership; learn and apply engineering best practices, testing, quality assurance, and Agile processes. Develop full-stack software using applicable programming languages and frameworks, leverage cloud and container technologies, and use AI coding assistants to improve productivity.

Own the architecture and technical direction for LearnLux’s next-generation member experience. Design and ship AI-powered features across React, TypeScript, Node.js, Python, and serverless GCP systems; lead complex multi-quarter initiatives; establish reliable agentic development practices; make scalable architectural decisions; and mentor senior engineers. Partner with Product, Design, leadership, and business teams to translate ambiguous problems into executable technical strategies and durable product foundations.

Design, develop, test, and maintain cloud-native microservices and user interfaces within an agile team. Write automated tests, deploy via a DevSecOps pipeline, troubleshoot issues, and support user adoption for mission management applications.

Deploys, integrates, installs, tests, sustains, and troubleshoots full-stack applications in classified environments. Participates across the application lifecycle, supports enterprise compute, storage, network, and database environments, and bridges classified programs with unclassified applications. The role also involves enterprise application deployment, container orchestration, DevOps practices, database administration, and collaboration with technical teams and customers.

Develop and maintain full-stack healthcare applications across front-end, back-end, databases, APIs, cloud infrastructure, and mobile platforms. Partner with product managers, clinicians, and staff to define requirements, deliver user-facing features, improve reliability, write maintainable code, test and debug systems, and support secure integrations. The role uses .NET, C#, Angular, TypeScript, SQL Server, Azure, Docker, GitLab CI/CD, and Capacitor.

Develop and maintain high-performance Java applications across web, mobile, and enterprise systems. Responsibilities include designing software, integrating front-end technologies, working with Spring and Hibernate, managing relational databases, writing tests, debugging issues, and contributing to Agile/Scrum development. The role also involves using build tools, Git, cloud and DevOps technologies, coding standards, design patterns, and continuous improvement practices.

Develop and own full-stack web features from technical design through deployment, monitoring, and optimization. Build APIs, backend services, responsive frontend experiences, relational database schemas, and complex SQL queries. Improve legacy systems, troubleshoot performance issues, participate in code reviews, and collaborate with product, design, and engineering teams in an agile continuous-deployment environment. Apply sound judgment when using AI-assisted development tools while maintaining security, privacy, reliability, and code quality.