Senior Fullstack Engineer

Responsibilities

• Build and maintain a custom-built double-entry ledger system
• Design and scale lending products, including credit disbursements and loan management
• Implement robust integrations with payment gateways and banking partners
• Create high-trust user interfaces for payments and lending
• Balance rapid feature shipping with financial system correctness
• Provide technical mentorship and rigorous code reviews

Requirements

• 5+ years of experience with backend systems (Python, Postgres, AWS)
• Proficiency in building modern frontends with React and TypeScript
• Fintech or payments experience involving ledgers or payment processors
• Expert-level SQL and relational database design skills
• Proven track record of fullstack ownership from design to production

Preferred Qualifications

• Experience with distributed systems
• Experience with credit or risk modeling
• Experience in the alternative asset space

Benefits

• Base salary range of $140,000-$180,000 plus 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

About the Company

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