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Senior Frontend Developer (Blockchain/Web3)
Senior Frontend Developer (Blockchain/Web3)Lawrence Harvey • New York, NY, United States
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Senior Frontend Developer (Blockchain / Web3)

Senior Frontend Developer (Blockchain / Web3)

Lawrence Harvey • New York, NY, United States
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  • [job_card.full_time]
[job_card.job_description]

Founding Engineer (React / TypeScript) – Stealth Startup In Blockchain / Web3 | New York City (Onsite)

Compensation : Up to $250k base salary plus meaningful equity

Location : Manhattan, New York (onsite, full-time)

About the Company

Our client is a stealth-mode startup building a next-generation high-frequency trading platform that connects Web3 and traditional finance. Their goal is to push the limits of performance, reliability, and transparency in decentralized trading infrastructure.

The company is backed by leading investors and founded by experts in low-latency systems, quantitative trading, and distributed technologies. They are seeking a Founding Frontend Engineer to join the core team at an early stage and help shape both the product experience and the company’s engineering culture.

The Role

As the Founding Frontend Engineer, you’ll design and build intuitive, high-performance interfaces that visualize complex real-time trading data and empower users with precision, speed, and clarity. You’ll work closely with the founding team to define the user experience, architecture, and frontend systems that power a next-generation Web3 trading platform.

This is an onsite, full-time position based in Manhattan. You will collaborate directly with the founders in a fast-paced, highly technical environment and help establish the foundation for frontend engineering excellence.

Key Responsibilities

  • Design and implement robust, performant web applications using React and TypeScript
  • Build responsive, mobile-first interfaces using Tailwind CSS , Flexbox , and CSS Grid
  • Develop and optimize real-time data visualizations using Chart.js , D3 , or similar libraries
  • Profile and enhance frontend performance using Lighthouse , React Profiler , and modern browser tools
  • Write maintainable, well-tested code and comprehensive test suites using Jest , Mocha , or similar frameworks
  • Collaborate with backend and product teams to integrate APIs, real-time data streams, and Web3 components
  • Define frontend best practices, development workflows, and architecture patterns from the ground up

Candidate Profile

  • 3+ years of experience building and deploying modern frontend applications
  • Expert-level proficiency in JavaScript , TypeScript , and React
  • Strong command of CSS fundamentals and experience with Tailwind CSS
  • Deep understanding of browser rendering, performance tuning, and debugging
  • Experience with testing frameworks and maintaining testable, scalable codebases
  • Familiarity with data-visualization and real-time UI patterns
  • Comfortable working in a fast-moving, early-stage environment with high ownership
  • Authorized to work in the United States
  • Interest in Web3, trading, or high-performance systems (experience a plus, not required)

    • Compensation and Benefits

  • Competitive base salary up to $250,000
  • Meaningful equity participation in a high-growth early-stage company
  • Opportunity to shape both the technical and product foundation of a next-generation trading platform
  • Work alongside a world-class founding team tackling complex, high-impact engineering challenges
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