Staff Backend Engineer

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.

Join our fast-growing startup in West Los Angeles 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 is in-office, fostering a fun and collaborative environment, with flexibility for a hybrid arrangement to accommodate personal needs as life comes up.

• 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
• 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
• 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