Frontend Developer

Nxt Level; New York (NY); On-site; USD 120,000 - 150,000; Full time

Job summary

Nxt Level in New York, NY is seeking a Senior Frontend Engineer to design and scale real-time logistics platforms. You’ll own frontend components across web and mobile surfaces, delivering high-performance React applications powered by WebSockets, SSE, and GraphQL subscriptions.

Collaborate with backend and operations teams, mentor engineers, and shape frontend architecture for rapid growth from 10 to 100 scale, in a fast-moving, engineering-first culture.

Qualifications

• 3+ years of frontend engineering experience.
• Strong React and React Native knowledge.
• Experience with real-time data and scalable frontend design.

Responsibilities

• Design and build high-performance React applications with real-time data via WebSockets, SSE, and GraphQL subscriptions
• Contribute to and shape courier mobile apps built in React Native
• Lead technical design for complex features from initial architecture through production rollout
• Improve frontend reliability, latency, and scalability in a high-throughput logistics environment
• Mentor engineers and raise the bar for frontend engineering across the team

Skills

React

React Native

WebSockets

GraphQL

Frontend architecture

Mentoring

Real-time data

Tools

GraphQL

WebSockets

SSE

Job description

We are looking for a Senior Frontend Engineer with 3+ years of experience to build and scale real-time logistics and operations platforms. You'll work across web and mobile surfaces, designing high-performance React applications powered by WebSockets, SSE, and GraphQL subscriptions. This is an opportunity to shape frontend architecture that directly powers real-world food delivery operations during a critical 10 → 100 scale phase. You'll partner closely with backend and operations teams, owning projects end-to-end in a fast-moving, engineering-first culture.

What will you be doing?

• Design and build high-performance React applications with real-time data via WebSockets, SSE, and GraphQL subscriptions
• Contribute to and shape courier mobile apps built in React Native
• Lead technical design for complex features from initial architecture through production rollout
• Improve frontend reliability, latency, and scalability in a high-throughput logistics environment
• Mentor engineers and raise the bar for frontend engineering across the team