Arena Club, co-founded by 5x World Series Champion Derek Jeter and entrepreneur Brian Lee, is revolutionizing the trading card industry. We're home to the , where fans buy, sell, and showcase trading cards like never before. With transparent grading, secure vaulting, and personalized online showrooms, we’re on a mission to make collecting more accessible, secure, and fun. Whether you're a lifelong collector or just getting started, Arena Club is where passion meets innovation. Join our fast-growing startup as a Senior Backend Engineer and help build the backbone of our platform. We are a dynamic, high-growth company where your work will have a direct impact on product success and scalability. This position can be in-office or hybrid as part of our Los Angeles team, or remote in the United States. * Design, build, and maintain scalable backend applications and APIs using Node.js, TypeScript, and Postgres * Leverage AI-powered coding tools (e.g., GitHub Copilot, Tabnine) to improve development speed, code quality, and system reliability * Architect and optimize systems for high scalability and performance as the business rapidly expands * Implement third-party integrations and external APIs to enhance the platform’s capabilities * Develop and maintain internal tools that support fulfillment operations, internal workflows, and machine learning initiatives * Collaborate cross-functionally with product, data, and frontend teams to ship high-impact features quickly * Ensure backend systems are secure, well-documented, and thoroughly tested * 5+ years of experience as a professional backend engineer * Strong proficiency in Node.js, TypeScript, and Postgres * Proven experience building and scaling eCommerce or online marketplace platforms * Passion for using the latest AI coding tools and AI-driven best practices to enhance development workflows * Deep understanding of cloud platforms (AWS or GCP) and containerization/infrastructure-as-code tools (Docker, Terraform) * Ability to move fast and iterate quickly in a startup environment while maintaining high code quality * Excellent problem-solving skills and the ability to communicate technical trade-offs effectively * Languages & Frameworks: TypeScript, Node.js, Python * Database: Postgres * Cloud & Infrastructure: AWS (S3, SQS, etc.) and/or GCP, Docker, Terraform * AI Development Tools: AI-powered coding assistants (e.g., GitHub Copilot, Tabnine), LLM-based development enhancements ### * Competitive Pay * Health, Dental, and Vision insurance * Disability and Life Insurance * Vacation and Sick Time * Room for growth in a fast-growing startup * Work alongside passionate collectors and industry innovators If you’re ready to be part of something big, We welcome all backgrounds—whether you're into sports, collectibles, gaming, Pokémon, or just love learning new things, we want to hear from you! No warehouse or fulfillment experience required—we’ll train the right person. ### Do you collect trading cards or other memorabilia? Let us know when you apply! Los Angeles (onsite or hybrid) or United States (remote) Full-Time | Senior-Level