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Senior Fullstack Engineer, Payments at alt | Remote

AltRemote
Remote Full-time $140K/yr - $180K/yr

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Experience Level

Senior

Qualifications

To be considered for this position, you should have:Proven experience in full-stack development, particularly with financial systems. Strong knowledge of double-entry ledger systems and payment integrations. Experience in designing user-friendly interfaces that prioritize user trust and security. Ability to balance the need for speed with the necessity of accuracy in financial transactions. Excellent communication skills and a collaborative mindset.

About the job

Alt is revolutionizing the world of alternative assets, beginning with the $5 billion trading card market. We empower collectors to buy, sell, vault, and finance their cards all in one platform, supported by top-tier investors from Stripe, Coinbase, Seven Seven Six, and renowned athletes like Tom Brady and Giannis Antetokounmpo. Our next major initiative involves implementing real-time pricing at scale, the Alt Value that drives every trade, loan, and product offered on our platform.

 

We are in search of a Senior Fullstack Engineer who is eager to construct the financial engine of our platform. Your role will extend beyond developing a checkout flow; you will be empowering the liquidity that sustains our marketplace. You will collaborate with a high-impact team responsible for our custom double-entry ledger, payment provider integrations, and key lending products.

If you possess a detail-oriented mindset for backend integrity while maintaining a proactive approach on the frontend, you'll excel in this role.

Your Responsibilities:

  • Engineer Financial Integrity: Develop and uphold our custom-built double-entry ledger system to guarantee every cent is accurately tracked across the platform.
  • Own Lending Infrastructure: Design and scale our lending products, from defining credit disbursement logic to automating the lifecycle of loan management.
  • Architect Integrations: Create and implement robust integrations with payment gateways and banking partners, ensuring 99.99% reliability and seamless reconciliation.
  • Own the UX of Money: Develop high-trust user interfaces for payments and lending that simplify complex financial transactions, making them feel transparent and secure.
  • Balance Rigor with Speed: Make informed decisions between rapid feature deployment and the uncompromising accuracy needed for financial systems.
  • Be a Multiplier: Enhance the team through thorough code reviews, technical documentation, and mentorship.

This Role is Ideal For You If You…

  • Are Obsessed with Correctness: You recognize that in payments, “mostly working” equates to failure. You deeply contemplate idempotency, race conditions, and data consistency.
  • Think Like a Product Owner: You don’t merely build a “pay button”; you comprehend the entire flow of financial transactions and their implications.

About Alt

At Alt, we are on a mission to unlock the value of alternative assets, starting with the lucrative trading card market. Our platform enables collectors to engage in buying, selling, vaulting, and financing their cards seamlessly. Backed by industry leaders and professional athletes, we are poised to redefine the landscape of asset trading.

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