Founding Engineer

Our client, an innovative venture-backed fintech start-up supported by top-tier investors (including early backers of Polymarket and Kalshi), is building a next-generation trading platform for sports fans to trade performance-based markets on professional athletes.

The organization is seeking a talented Founding Engineer (Frontend) to lead the development of their flagship consumer web application. Working closely alongside experienced co-founders with backgrounds from Apple, Google, Dragonfly, and Arbitrum, this key leadership hire will play a central role in designing intuitive trading and portfolio experiences while making complex underlying transaction flows seamless for users.

This is a full-time, in-office role located at our client’s office in Chelsea, New York City. It offers competitive compensation, high-impact product influence, and a significant founding equity stake.

• Lead frontend development for the flagship consumer web platform using React and TypeScript.
• Design and execute fast, highly responsive trading and portfolio management interfaces tailored to sports enthusiasts and everyday consumers.
• Collaborate directly with the founding team to shape the overarching product design, feature set, and technical roadmap.
• Partner with backend and protocol engineers to architect optimized APIs and streamlined transaction workflows that conceal underlying on-chain complexity from end users.
• Maintain rigorous standards for code quality, application performance, low-latency responsiveness, and platform reliability.

Requirements

• echnical Expertise: Advanced proficiency in modern frontend frameworks (React, TypeScript) with a proven track record of shipping polished, consumer-facing web applications.
• Architecture & State Management: Deep understanding of complex frontend application state, low-latency web performance, web responsiveness, and system reliability.
• Product Sense: Strong product intuition, with an eye for UI/UX detail and a user-centric approach to software development.
• Location: Based in or willing to work in-office in Chelsea, NYC on a full-time basis.

Preferred Qualifications (Nice-to-Have)

• Prior experience building user-facing features for trading platforms, prediction markets, brokerages, exchanges, sportsbooks, fintech, or web3/crypto systems.

Benefits

Base Salary: $180,000 - $220,000 annually (commensurate with experience)

Equity: 1.0% - 2.0% founding equity stake

Work Environment: Modern office space located in Chelsea, NYC

Direct influence on company direction and tech strategy as an early founding team member.

Due to the high volume of applications we anticipate, we regret that we are unable to provide individual feedback to all candidates. If you do not hear back from us within 4 weeks of your application, please assume that you have not been successful on this occasion. We genuinely appreciate your interest and wish you the best in your job search.

Commitment to Equality and Accessibility:

At MLabs, we are committed to offer equal opportunities to all candidates. We ensure no discrimination, accessible job adverts, and providing information in accessible formats. Our goal is to foster a diverse, inclusive workplace with equal opportunities for all. If you need any reasonable adjustments during any part of the hiring process or you would like to see the job-advert in an accessible format please let us know at the earliest opportunity by emailing [email protected].

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