Founding Frontend Engineer - Real-Time Trading Platform NYC

Sarsfield Group; New York (NY); On-site; USD 175,000 - 225,000; Full time

Benefits offered by this job

Health coverage

Expensed lunches

Laptop and desktop provided

Job summary

Sarsfield Group is hiring its first frontend engineer for an on-site role in New York City. You will own the consumer web trading platform, shipping polished UI with real-time data and performance in mind.

You'll collaborate directly with the founders to shape the product roadmap, drive frontend architecture, and deliver fast, intuitive experiences with on-chain features. Equity and competitive salary reflect early-stage founding status.

Qualifications

• 2 to 8 years of frontend engineering experience.
• A track record of shipping polished consumer web applications.
• Deep understanding of performance, reliability, and complex application state.
• Comfort working in a small, fast-moving team alongside founders from Apple, Google, and leading crypto firms.
• Strong product judgment: not just how things look, but how they work and feel in a user’s hands.

Responsibilities

• Own and lead development of the company’s consumer web trading platform.
• Build fast, intuitive trading and portfolio experiences that make onchain settlement invisible to sports fans.
• Work directly with the two cofounders, a former crypto VC partner and product manager and a former Big Tech tech lead, to shape the product and technical roadmap.
• Drive frontend architecture decisions across a service-based stack, managing complex application state and real-time data flows.
• Help design APIs and transaction flows that bridge blockchain infrastructure and a seamless user experience.
• Help set a culture of high ownership and velocity as a true founding team member.

Skills

Frontend engineering

Performance optimization

Real-time data handling

Product judgment

Job description

Sarsfield Group is hiring its first frontend engineer for an on-site role in New York City. You will own the consumer web trading platform, shipping polished UI with real-time data and performance in mind.

You'll collaborate directly with the founders to shape the product roadmap, drive frontend architecture, and deliver fast, intuitive experiences with on-chain features. Equity and competitive salary reflect early-stage founding status.