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Staff Backend Engineer at Arena Club. . Location: US - Remote. About Arena Club.  . . If you’re fascinated by sports cards and memorabilia, your search ends here. Arena Club is pioneering the collectibles domain by introducing the first-ever digital card show. Spearheaded by 5x World Series Champion Derek Jeter and serial entrepreneur Brian Lee, Arena Club has developed a fully digital marketplace. This innovative platform is built on trust, transparency, and fun, featuring grading & authentication, vaulting, and digital pack openings for collectors to build and showcase their collections in a personalized online showroom from anywhere in the world..  . . Role Overview. . . Join our fast-growing startup as as a Staff 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. . . Key Responsibilities. . . 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. . Set backend engineering standards and guide architectural decisions to ensure long-term scalability, performance, and reliability. . Provide technical leadership and mentorship to other engineers, shaping the culture and velocity of a growing team. . 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. . . Qualifications. . . 8+ 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). . Experience setting engineering best practices, making architectural decisions, and influencing technical direction across teams. . 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. . . Tech Stack. . . 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.