Senior Fullstack Engineer - Payments Platform
About the Role
We're hiring a Senior Fullstack Engineer to join our innovative team at Alt. As a Senior Fullstack Engineer, you will play a crucial role in building the financial engine of our payments platform. This is not just about creating a checkout flow; it's about powering the liquidity that makes our marketplace thrive. If you are passionate about building robust financial systems and enjoy working in a dynamic environment, this Senior Fullstack Engineer remote position is perfect for you.
What You'll Do
- Engineer Financial Integrity: Build and maintain our custom-built double-entry ledger system to ensure every cent is accounted for across the platform.
- Own Lending Infrastructure: Design and scale our lending products—from the logic of credit disbursements to the automated lifecycle of loan management.
- Architect Integrations: Design and implement robust integrations with payment gateways and banking partners, ensuring 99.99% reliability and seamless reconciliation.
- Own the UX of Money: Create high-trust user interfaces for payments and lending that make complex financial actions feel simple, transparent, and secure.
- Balance Rigor with Speed: Make thoughtful trade-offs between rapid feature shipping and the uncompromising correctness required for financial systems.
- Be a Multiplier: Level up the team through rigorous code reviews, technical documentation, and mentorship.
Requirements
- 5+ years of experience with a heavy focus on backend systems (Python, Postgres, AWS) and a proven ability to build modern frontends (React, TypeScript).
- Fintech or Payments experience: You’ve worked with ledgers, payment processors, or lending products and understand the complexities of moving money.
- Database Mastery: You are an expert in SQL and relational database design—you know how to write a transaction that won't fail under load.
- Fullstack Ownership: A track record of taking a complex financial feature from a technical design doc all the way to a polished UI in production.
- Bonus: Experience with distributed systems, credit/risk modeling, or the alternative asset space.
What We Offer
- A seat at the table to help shape the future of Alt and the alternative asset space.
- Autonomy and ownership on projects that matter.
- $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).
This Senior Fullstack Engineer remote position offers a competitive base salary range of $140,000-$180,000, plus equity. Join us at Alt and be part of a team that is transforming the payments landscape!
This role offers a unique opportunity to work on a cutting-edge payments platform with a competitive salary and equity options. The company is backed by notable investors, enhancing its credibility.
Who Will Succeed Here
Proficient in building scalable applications using Python and React, with experience in developing and optimizing PostgreSQL databases to handle high transaction volumes typical in financial systems.
Self-motivated and disciplined in a remote work environment, demonstrating the ability to manage time effectively and deliver high-quality code with minimal supervision while collaborating with cross-functional teams.
Deep understanding of cloud services, particularly AWS, to implement reliable and secure payment solutions, along with a strong mindset for continuous learning and adapting to new financial technologies.
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