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Calyptus

Full Stack Engineer

Calyptus, New York, New York, us, 10261

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We are seeking a

Full-Stack Engineer

to work on Credit, the company’s leading undercollateralized lending system, with a focus on the World MiniApp and

credit.cash . The ideal candidate will have expertise in Ethereum and TypeScript, along with strong knowledge of Postgres, Next.js, and React. While speed is crucial, equal emphasis is placed on quality and rigor. Products must perform smoothly for users worldwide, particularly those on lower-end devices. Working closely with the founding team, the engineer will ship frequently and make a direct impact on hundreds of thousands of lives, seeing their work in use every day.

Stack

Next.js (TypeScript)

Postgres

React

Tailwind (shadcn)

World’s MiniKit

Viem / wagmi

Key Responsibilities

Drive end-to-end development of applications, with a focus on performance, scalability, and reliability

Design and scale infrastructure and services to deliver fast, efficient performance across regions

Build and optimize frontend components for responsiveness and accessibility across mobile and desktop devices

Lead technical discussions, provide guidance, and mentor junior engineers

Collaborate cross-functionally with product and design to deliver impactful features

Ensure code quality through reviews, refactoring, and maintaining best practices across the codebase

Requirements

Proven expertise in Ethereum and TypeScript

Strong experience with Postgres, Next.js, and React

Track record of building and scaling production web applications

Deep understanding of backend performance and optimization techniques Experience scaling infrastructure, including databases, hosting, and networking

Exceptional problem-solving skills and attention to detail

Nice to Have

Experience providing technical leadership or mentorship

Familiarity with shadcn, World’s MiniKit, and Viem/wagmi

Contributions to open-source software projects

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