Remote Junior Mern Stack Developer Jobs in Arizona

Set the technical direction for how arrivia builds with AI agents, architecting systems and raising the engineering bar across teams.

As a Senior Agentic Software Engineer, you are a product-minded, full-stack engineer who ships faster and smarter with AI coding agents as core development tools. Operating with limited oversight and broad organizational scope, you architect systems, set technical direction, and drive engineering standards across teams.

This role helps shape the technology foundation behind arrivia, a leader in travel loyalty, membership, and cruise solutions, powering travel for millions of members.

You will make high-impact architectural and strategic decisions that shape the platform's foundation, weighing innovation, risk, scalability, and business impact. You lead by example, mentoring engineers across teams and influencing technology investment decisions.

You will shape how the whole organization adopts agentic development, defining the patterns, prompt libraries, and MCP integrations that multiply every engineer's impact, using tools like Claude Code, Cursor, and GitHub Copilot.

What You'll Own

• Architect the platform: Architect, design, and develop features and services for our travel platform as a technical leader on a full-stack product team.
• Drive agentic adoption: Standardize agentic coding tools across engineering teams, establishing best practices, prompt libraries, and workflows that amplify productivity org-wide.
• Set the quality bar: Review and validate AI-generated code for correctness, security, performance, and maintainability, setting the standard across teams.
• Modernize at scale: Revitalize aging services through refactoring, migration, and cloud-native distributed design.
• Strategize agentic workflows: Define patterns and platforms that automate testing, documentation, code-review triage, and deployment checks at scale.
• Architect MCP integrations: Design Model Context Protocol integrations that connect AI agents to internal tools, data, and platform services across the development lifecycle.
• Lead distributed systems: Lead improvements to development and operations of an increasingly distributed architecture across cloud platforms.
• Protect member trust: Safeguard the privacy and security of members' sensitive data with our Risk and Security teams.
• Increase velocity: Introduce processes that help us ship quicker, learn sooner, and isolate impact, and help establish and meet system SLOs.
• Mentor across teams: Guide engineers on AI-assisted development, prompt engineering, and agentic workflow design.

What You'll Bring

• 8+ years of full-stack development and architectural experience building web applications and services.
• Expert proficiency using AI coding agents such as Claude Code, Cursor, or GitHub Copilot in professional workflows.
• Strong proficiency in two or more of TypeScript/JavaScript, Python, or C#/.NET.
• Deep experience with modern frontend frameworks such as React, Next.js, Vue, or Angular.
• A proven track record architecting and delivering cloud-native solutions on AWS, Azure, or GCP.
• Extensive experience with RESTful API design and microservices architecture.
• Deep understanding of the Model Context Protocol (MCP) and experience architecting MCP server ecosystems.
• Experience with containerization and orchestration (Docker, Kubernetes) and CI/CD pipelines.
• A track record of leading technical designs, mentoring engineers across teams, and raising engineering maturity.
• A formal CS degree is a plus, not a requirement. Depth of engineering knowledge matters most.

Benefits & Perks

• Unlimited PTO
• Exclusive employee travel rates
• Travel discounts through arrivia programs
• Medical, dental, and vision insurance
• 401(k) with company participation

Who We Are

arrivia is the leading provider of travel loyalty, membership, and cruise solutions, powering travel experiences for millions of members through some of the world's most recognized brands, including T-Mobile, Marriott Vacations Worldwide, Hilton Grand Vacations, American Express, Alaska Airlines, Singapore Airlines, and more.

We're combining travel, technology, and innovation to build the future of loyalty. Through continued investment in AI, automation, and next-generation travel solutions, arrivia is transforming how people discover, book, and experience travel around the world.