Software Engineer at Den

Jack & Jill; New York (NY); On-site; USD 110,000 - 160,000; Full time

Job summary

Den, a New York-based crypto infrastructure company, is hiring a Software Engineer to build full-stack web apps that secure billions in assets for leading institutions. You’ll work with TypeScript, Next.js, and Node.js, shipping features for a high-volume wallet infrastructure with the co-founders.

You’ll design scalable systems using Viem, Prisma, and PostgreSQL, collaborating closely with the founders to shape the engineering culture as traffic scales from billions to trillions.

Qualifications

• 1–4 years of production experience shipping code in a fast-paced environment.
• Strong proficiency with TypeScript and the modern React/Node ecosystem.
• Genuine interest in crypto and scale-focused problem solving.

Responsibilities

• Develop and scale full-stack applications using TypeScript, Next.js, and Node.js for high-volume institutional crypto transactions.
• Collaborate with founders to architect new features and make core wallet infrastructure decisions.
• Bridge blockchain protocols with seamless user experiences using Viem, Prisma, and PostgreSQL.

Skills

TypeScript

React

Node.js

Crypto

Tools

Next.js

Viem

Prisma

PostgreSQL

Job description

Job Title

Software Engineer

Salary

Not Disclosed

Company Description

Den is a New York-based crypto infrastructure company securing the largest organizations in the global crypto economy. Backed by IDEO CoLab Ventures and top crypto investors, Den provides institutional-grade wallet infrastructure for over 800 teams, including Lido and Worldcoin, having processed over $10B in transaction volume to date.

Job Description

As a Software Engineer at Den, you will build full-stack web applications that secure billions in assets for leading crypto institutions. Working directly with technical co-founders, you’ll ship critical features across the TypeScript stack and help define the engineering culture as transaction volumes scale from $1B toward $18T.

Location

New York, USA

Why this role is remarkable

• Join a high-growth crypto infrastructure leader that saw transaction volume explode from $1B in 2024 to $7.5B in 2025.
• Work directly with technical founders from ConstitutionDAO who have deep experience in smart contract development and scaling backend infrastructure.
• Contribute to a mission-critical platform trusted by industry giants like Lido and Worldcoin to secure their most vital on-chain deposits.

What You Will Do

• Develop and scale full-stack applications using TypeScript, Next.js, and Node.js to facilitate secure, high-volume institutional crypto transactions.
• Collaborate with the co-founders to architect new features and make foundational technical decisions for the core wallet infrastructure.
• Bridge the gap between complex blockchain protocols and seamless user experiences using tools like Viem, Prisma, and PostgreSQL.

The ideal candidate

• Possesses 1-4 years of experience shipping production-grade code with a strong proficiency in TypeScript and the modern React/Node ecosystem.
• Demonstrates an insatiable curiosity for crypto and the ability to execute at high speeds in a fast-paced, high-ownership environment.
• Combines technical excellence with project management skills and the ability to make architectural decisions that will scale with the company.