Founding Fullstack Engineer

We seek a fullstack engineer to lead Back End development, including our blockchain indexer, and contribute to the Front End of our World MiniApp. Expertise in Rust, Ethereum, and Typescript is required, along with strong knowledge of Postgres, Next.js, and React.

While speed is essential, quality, rigor, and optimization are equally important, especially for users on lower-end devices. Working closely with the founders, you'll ship frequently and directly impact thousands-potentially millions-of lives, with your work used daily by many. Stack

• Rust
• Next.js (Typescript)
• React
• Tailwinds (shadcn)
• World's MiniKit

Key responsibilities

• Lead Back End development of the World MiniApp focusing on performance and scalability
• Own development of the blockchain indexer
• Lead technical discussions and mentor junior engineers
• Collaborate cross-functionally to deliver features
• Review pull requests, maintain code quality, and refactor as needed

• Expertise in Rust, Ethereum, and TypeScript
• Strong knowledge of Postgres, Next.js, and React
• Experience building and scaling successful web applications
• Deep understanding of Back End performance optimization
• Exceptional problem-solving skills and attention to detail
• Experience scaling infrastructure, including databases, hosting, and networking

Nice to have

• Experience in technical leadership
• Familiarity with shadcn and World's MiniKit
• Open-source contributions

San Francisco, CA - $1k Full Time Posted by: Second Renaissance Posted: Thursday, 4 June 2026 Traditional credit systems are designed for people who already have money, creating barriers for those in need-over 1.4 billion people lack access to credit. Many individuals, such as a vendor in Lagos earning daily cash or a Colombian nurse with perfect informal repayment history, remain invisible to banks. Even those with savings are often excluded. The economics of serving the global majority are unprofitable for traditional institutions. We built Credit to address these issues. Instead of costly verification, we use trust-building: loans start small and can grow to over USD $1,000. In Argentina, amid inflation, over 20,000 people use Credit for essentials, calling it "la salvación del mes"-the month's salvation. Our undercollateralized lending scales effectively, with default rates approaching zero as trust builds. Currently, 140,000 people await access. Backed by Paradigm and Nascent, we aim to create a profitable, scalable system serving those banks cannot. Our vision is for instant, universal, algorithmic credit-technology and demand exist. Join us in making credit a human right, not a privilege.