Senior / Tech Lead Mobile App Developer

Wintermeyer Ventures; New York (NY); Remote; USD 150,000 - 250,000; Full time

Job summary

Wintermeyer Ventures is seeking an experienced mobile engineer to own the React Native app across iOS and Android, while providing technical leadership as the product grows. Join a lean, fully remote team building a blockchain trading platform, with responsibilities spanning architecture, performance, and end-to-end delivery from design through app store releases.

Experience in crypto or DeFi is highly valued.

Qualifications

• 7 to 10 years of mobile development experience.
• Professional experience with React Native, React, TypeScript, and JavaScript, with apps on iOS and Android.
• Experience with mobile CI/CD, REST APIs, and real-time integrations (gRPC, SSE, WebSockets); Node.js familiarity is useful.
• Production mobile app experience in crypto, blockchain, Web3, or DeFi, with Cosmos SDK or EVM familiarity.
• Fintech or trading app experience including market data, order execution, or charting is a plus.
• Must be a US citizen or permanent resident.

Responsibilities

• Own the app's architecture, performance, reliability, scalability, and long-term maintainability.
• Build complex trading and prediction market features using React Native and TypeScript.
• Collaborate with Product, Design, and Engineering to shape APIs, integrations, and real‑time data flows.
• Lead features from technical design through implementation, testing, app store releases, monitoring, and iteration.
• Investigate production issues, improve performance, and support engineering quality through code reviews and technical discussions.

Skills

React Native

TypeScript

JavaScript

Mobile architecture

CI/CD

REST APIs

Real-time data

Node.js

Crypto familiarity

Tools

gRPC

Server-Sent Events

WebSockets

Node.js

Job description

About the Role

Join a lean, fully remote team building mobile experiences for a blockchain trading platform. You will own the React Native app across iOS and Android, combining hands‑on development with technical leadership as the product grows.

What You'll Do

• Own the app's architecture, performance, reliability, scalability, and long-term maintainability.
• Build complex trading and prediction market features using React Native and TypeScript.
• Collaborate with Product, Design, and Engineering to shape APIs, integrations, and real‑time data flows.
• Lead features from technical design through implementation, testing, app store releases, monitoring, and iteration.
• Investigate production issues, improve performance, and support engineering quality through code reviews and technical discussions.

What We're Looking For

• 7 to 10 years of mobile development experience, including ownership of architecture and technical decisions for production applications.
• Professional experience with React Native, React, TypeScript, and JavaScript, and a track record of shipping apps on iOS and Android.
• Experience with mobile CI/CD, REST APIs, and real‑time integrations such as gRPC, Server‑Sent Events, and WebSockets; familiarity with Node.js is useful.
• Production mobile app experience in crypto, blockchain, Web3, or DeFi, with familiarity with Cosmos SDK or EVM ecosystems.
• Fintech or trading app experience, including market data, order execution, or charting, is a plus.
• Must be a US citizen or permanent resident.

Compensation & Benefits

Annual salary range: $150,000 to $250,000 USD. Visa sponsorship is not available.

Location

Fully remote within the United States, with New York, New York as the primary location.