Alt is looking for a Senior Fullstack Engineer to build the engine behind a marketplace that moves hundreds of millions of dollars in GMV. You'll sit at the intersection of high-scale transaction systems and AI to build products for consignors, buyers, and power sellers.
What You'll Do
- Architect and scale the high-concurrency bidding and listing systems that power 9-figure annual GMV.
- Develop next-gen features that leverage AI to provide instant valuations and upfront liquidity to consignors and sellers.
- Use data and machine learning to build rich, personalized discovery experiences that match unique collectibles to the right buyers.
- Design and launch sophisticated management tools for high-frequency 'power sellers' and veteran hobbyists.
- Build end-to-end from low-latency backend logic for live bidding to sleek, responsive UI.
- Mentor the team and set the standard for code quality, system reliability, and performance.
What We're Looking For
- 5+ years of experience building and scaling complex applications.
- Deep experience with React, TypeScript, and building high-performance, real-time UIs.
- Product instincts and understanding of the collector mindset.
- Track record of building systems that stay up under high stakes and high traffic.
Nice to Have
- Experience working with personalization engines, recommendation systems, or AI/ML integrations.
Technical Stack
- Python
- Postgres
- AWS/Cloud infra
- React
- TypeScript
Team & Environment
You will join the Auctions team.
Benefits & Compensation
- Salary: $140,000-$180,000 + equity
- $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)
Work Mode
This is a remote position.
You will have a seat at the table to help shape the future of Alt and the alternative asset space, with autonomy and ownership on projects that matter.





