Founding Full-Stack Engineer — Build a Resilient Security Platform

Underdog.io -Apply to top tech jobs in 60 seconds. A place where companies apply to you; New York (NY); On-site; USD 150,000 - 210,000; Full time

Benefits offered by this job

Founder-tier equity

Competitive salary

Job summary

Underdog.io in NYC is seeking a Founding Full-Stack Engineer to build customer-facing portal, internal tools, and backend services. You’ll collaborate with security and infra teams to turn complex workflows into intuitive, secure experiences for enterprises worldwide.

The role requires 3+ years shipping production systems with React, Next.js, TypeScript, Node.js, and PostgreSQL. You’ll own end-to-end features, design architecture, and drive early-stage development in a hybrid NYC setting.

Qualifications

• 3+ years as a full-stack engineer shipping production systems.
• Frontend mastery with React, Next.js and TypeScript.
• Core understanding of web architecture, auth (OAuth/SAML), CI/CD and testing.
• Startup mindset: thrives in ambiguity, owns outcomes and iterates rapidly.

Responsibilities

• Build responsive web apps (React, Next.js, TypeScript) for developers and enterprise users.
• Design & optimize APIs and backend services (Node.js, PostgreSQL).
• Expose infrastructure pipelines (build orchestration, artifact distribution) via UI/APIs.
• Ship end-to-end features across the stack, from dashboards to access controls.
• Embed security and usability into customer tools and internal platforms.
• Co-define architecture and drive technical decisions in early-stage development.

Skills

React

Next.js

TypeScript

Web architecture

OAuth/SAML

CI/CD

Testing

Startup mindset

Job description

Underdog.io in NYC is seeking a Founding Full-Stack Engineer to build customer-facing portal, internal tools, and backend services. You’ll collaborate with security and infra teams to turn complex workflows into intuitive, secure experiences for enterprises worldwide.

The role requires 3+ years shipping production systems with React, Next.js, TypeScript, Node.js, and PostgreSQL. You’ll own end-to-end features, design architecture, and drive early-stage development in a hybrid NYC setting.