Alt · 1 day ago
Senior Fullstack Engineer, Auctions
United States
Full-time
Remote
Senior Level
$140K/yr - $180K/yr
5+ years expAlt is unlocking the value of alternative assets, starting with the trading-card market. They are seeking a Senior Fullstack Engineer to build the engine behind a marketplace that handles high-concurrency environments and high-scale transactions, while leveraging AI for personalized experiences and liquidity solutions.
FinanceFinancial ServicesFinTechLendingMarketplace
Responsibilities
Architect the Auction Engine: Build and scale the high-concurrency bidding and listing systems that power 9-figure annual GMV
Ship AI-Powered Liquidity: Develop next-gen features that leverage AI to provide instant valuations and upfront liquidity to our consignors and sellers
Personalize the Hobby: Use data and machine learning to build rich, personalized discovery experiences that match unique collectibles to the right buyers
Empower Power Users: Design and launch sophisticated management tools for everyone from high-frequency "power sellers" to veteran hobbyists
Own the Experience: Build end-to-end—from the low-latency backend logic required for live bidding to the sleek, responsive UI where the action happens
Drive Technical Excellence: Mentor the team and set the standard for code quality, system reliability, and performance
Qualification
Required
5+ years of experience building and scaling complex applications (Python, Postgres, AWS/Cloud infra)
Deep experience with React, TypeScript, and building high-performance, real-time UIs
Experience working with personalization engines, recommendation systems, or AI/ML integrations
Understanding of the collector mindset and ability to build features that delight them
Track record of building systems that stay up when the stakes (and the traffic) are highest
Preferred
Experience with AI-powered features and practical applications of LLMs or computer vision models
Ability to visualize how a data schema change on the backend will impact user experience
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, for you and your dependent(s)
Company
Alt
Alt is an online marketplace that enables users to buy, sell, and vault authenticated trading cards.
51-200 employees
Funding
Current Stage
Growth StageTotal Funding
$146.01MKey Investors
Trinity CapitalSpearheadSeven Seven Six
2025-07-18Debt Financing· $40M
2023-01-01Series Unknown
2021-11-08Series B· $75M
Leadership Team
Leore Avidar
Founder and CEO
Recent News
2025-11-14
2025-07-19
Company data provided by crunchbase