Senior Backend Engineer at Arena Club

<h3><strong>About Arena Club</strong></h3> <p>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 &amp; authentication, vaulting, and digital pack openings for collectors to build and showcase their collections in a personalized online showroom from anywhere in the world.</p> <h3>&nbsp;</h3> <h3><strong>About The Role</strong></h3> <p>We're seeking a Senior Backend Engineer and help scale the backbone of our platform and expand into new product categories. We are a dynamic, high-growth company where your work will directly impact 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 they arise.</p> <p>&nbsp;</p> <h3><strong>What You Will Do</strong></h3> <ul> <li>Design, build, and maintain scalable backend applications and APIs using Node.js, TypeScript, and Postgres</li> <li>Leverage AI-powered coding tools to improve development speed, code quality, and system reliability</li> <li>Architect and optimize systems for high scalability and performance as the business rapidly expands</li> <li>Implement third-party integrations and external APIs to enhance the platform’s capabilities</li> <li>Develop and maintain internal tools that support fulfillment operations, internal workflows, and machine learning initiatives</li> <li>Collaborate cross-functionally with product, data, and frontend teams to ship high-impact features quickly</li> <li>Ensure backend systems are secure, well-documented, and thoroughly tested</li> </ul> <h3>&nbsp;</h3> <h3><strong>Qualifications</strong></h3> <ul> <li>6+ years of experience as a professional backend engineer</li> <li>Strong proficiency in Node.js, TypeScript, and Postgres</li> <li>Proven experience building and scaling eCommerce or online marketplace platforms</li> <li>Passion for using the latest AI coding tools and AI-driven best practices to enhance development workflows</li> <li>Deep understanding of cloud platforms (AWS or GCP) and containerization/infrastructure-as-code tools (Docker, Terraform)</li> <li>Hands-on experience using AI tools (Claude or Cursor preferred; other agentic tools welcome) to ship code, build agents, and automate workflows</li> <li>Ability to move fast and iterate quickly in a startup environment while maintaining high code quality</li> <li>Excellent problem-solving skills and the ability to communicate technical trade-offs effectively</li> </ul> <h4><strong>Tech Stack</strong></h4> <ul> <li>Languages &amp; Frameworks: TypeScript, Node.js, Python</li> <li>Database: Postgres</li> <li>Cloud &amp; Infrastructure: AWS (S3, SQS, etc.) and/or GCP, Docker, Terraform</li> <li>AI Development Tools: AI-powered coding assistants and LLM-based development enhancements</li> </ul> <h2>&nbsp;</h2> <h3><strong>The Arena Club Standard</strong></h3> <p>Life at Arena Club isn’t for the faint of heart — and that’s by design. We’re building products and experiences the collectibles world has never seen. This is a proving ground. It demands your best every single day, because anything less means you’re falling behind.</p> <p>From day one, you’re in the game. Trusted to deliver, expected to own outcomes, and driven to raise the bar higher than you thought possible. We don’t just execute — we innovate, compete, and win together.</p> <p>If you want routine or predictability, you won’t find it here. But if you’re ambitious, relentless, and hungry to prove yourself on a team built to dominate — step into the arena. You’ll discover growth and reward here, unlike anywhere else.</p><div class="content-pay-transparency"><div class="pay-input"><div class="description"><p>The base salary range listed is a guideline. Actual compensation is determined based on skills, experience, and the impact you bring. Total compensation includes base salary, bonus, and equity.</p></div><div class="title">Salary Range</div><div class="pay-range"><span>$150,000</span><span class="divider">&mdash;</span><span>$195,000 USD</span></div></div></div>