Founding Full-Stack Engineer

Butterfly Security; United States; Remote; USD 180,000 - 260,000; Full time

Benefits offered by this job

Equity 0.5–1.5%

Job summary

Butterfly Security seeks a senior full-stack engineer to build the customer-facing product and web experience as an early team member. You’ll work on core application surfaces and the public site with emphasis on polished interaction, speed, accessibility, and consistent design.

You will own features end-to-end, from implementation through production, while collaborating with a design-led team. This role can be based in San Francisco or fully remote within the United States.

Qualifications

• Senior full-stack experience in a product-focused environment.
• Proficiency in React, TypeScript, and Next.js.
• Strong eye for interaction details, responsiveness and polish.

Responsibilities

• Develop the product dashboard, previews, and admin tools.
• Refine marketing site, pricing pages, and conversion flows.
• Own performance and accessibility across customer-facing experiences.
• Maintain design-system consistency with the founding designer.
• Deliver complete features from idea to production.

Skills

Senior full-stack experience

React

TypeScript

Next.js

Interaction design polish

Tools

React

TypeScript

Next.js

Job description

Role overview

Build the customer-facing product and web experience as an early full-stack engineer. The work spans core application surfaces and the public-facing site, with a strong emphasis on polished interaction, speed, accessibility, and consistent design.

Responsibilities

• Develop the product dashboard, restore previews, audit-pack generator, and administrative tools.
• Build and refine the marketing site, pricing pages, and conversion flows.
• Own performance and accessibility across customer-facing experiences, including attention to latency and layout stability.
• Maintain design-system consistency and work closely with the founding designer.
• Deliver complete features independently, from implementation through production.

Requirements

• Senior full-stack engineering experience in a product-focused environment.
• Deep expertise in React, TypeScript, and Next.js.
• Familiarity with server components, hydration, and edge runtimes.
• Strong eye for interaction details, responsiveness, and visual polish.
• Ability to take work from idea to shipped product with limited day-to-day direction.

Benefits and work setup

• San Francisco or remote within the US.
• Salary range: $180,000–$260,000, plus 0.5%–1.5% equity.