Senior Fullstack Engineer

Responsibilities

• Architect the Auction Engine to build and scale high-concurrency bidding and listing systems
• Develop AI-powered features for instant valuations and upfront liquidity
• Build personalized discovery experiences using data and machine learning
• Design and launch sophisticated management tools for power sellers and hobbyists
• Build end-to-end features from low-latency backend logic to responsive UIs
• Mentor the team and set standards for code quality, reliability, and performance

Requirements

• 5+ years of experience building and scaling complex applications
• Proficiency with Python, Postgres, and AWS/Cloud infrastructure
• Deep experience with React and TypeScript
• Experience building high-performance, real-time UIs
• Track record of building reliable systems under high traffic and pressure

Preferred Qualifications

• Experience with personalization engines or recommendation systems
• Experience with AI/ML integrations

Benefits

• $100/month work-from-home stipend
• $200/month wellness stipend
• WeWork office stipend
• 401(k) retirement benefits
• Flexible vacation policy
• Generous paid parental leave
• Competitive healthcare benefits, including HSA

About the Company

Alt is unlocking the value of alternative assets, starting with the $5 B trading-card market. We let collectors buy, sell, vault, and finance their cards in one place.