Senior Software Engineer, Vault

5+ years of backend experience (Python, Postgres, AWS or similar cloud infrastructure) and frontend experience (React, React Native, JavaScript/TypeScript). Both halves are load-bearing here.

A track record of owning features or systems from design to production. Design doc through shipped UI, not a ticket you closed.

Business-owner thinking. You understand P&Ls, SLAs, and what it takes to run a product as an independent business unit — not just ship code inside one.

A pull toward operational complexity. You're energized by problems that bridge software and the physical world: logistics, imaging, asset handling, partner integrations.

Pragmatism and pace. You know when to build custom and when to integrate, and you bias toward action.

Strong collaboration and communication. You write great docs, ask smart questions, and give thoughtful feedback.

A user-first mindset with a sharp eye for clean UX and performance.

Bonus: familiarity with the collectibles space or alternative asset marketplaces. Logistics, customs, or shipping systems experience. You collect.

We'll be specific so you can prepare. Before any of it: download the app, put a card up, make a bid, and try selling. Every round assumes you've used the product, and we expect your point of view to sharpen as you go. For this role, also look at what we say about the vault itself — where your card physically goes, and what you'd want to know if it were yours.

1. Recruiter screen — 25 minutes, Google Meet. Come ready to talk about the metric you own today and how you're performing against it, why Alt specifically, and how you're actually using AI. We'll align on comp and answer your questions.

2. Hiring manager — 45 minutes, Google Meet. Be ready to go deep on a system you owned end to end: what you built, what alternatives you considered, what you'd do differently now, and what the impact was. Have the numbers.

3. Technical screen — 60 minutes. A hands-on working session close to what this role actually does. Think out loud.

4. System design — 60 minutes. Design an external-facing vault API and the pipeline behind it under real constraints. We'll push back on at least one of your choices on purpose — how you take that matters as much as the design.

5. Culture interview — How you work in ambiguity and with the operations people on the other side of your software.

6. Leore, our founder and CEO — 30 minutes. Everyone who joins Alt meets Leore. Come with a point of view on where you'd take Vault first.

7. Reference check(s) — 15 minutes with a former manager(s)