ItexUS

full stack developer for fintech

In short

Senior full stack developer role building and maintaining a React Native SDK with brownfield integration into partners' apps, plus Node.js/TypeScript BFF endpoints exposed over RPC. The company operates in a regulated fintech environment, requiring strong React Native, TypeScript, Node.js, SQL skills and Upper-Intermediate+ English. Remote work under B2B cooperation terms.

Tasks
•Build and maintain functionality in the React Native SDK, including brownfield integration into partners' host apps
•Design and implement supporting BFF endpoints in Node.js and TypeScript, exposed over RPC
•Debug the full request path across the mobile client, network, BFF, and external services
•Review other engineers' code and provide substantive feedback
•Participate in production incident response, analyze logs, and trace issues to their root cause
•Make pragmatic technical decisions amid changing requirements and strict regulatory constraints
Requirements
•Strong experience with React Native, including Expo and bare workflows and native module integration
•Strong TypeScript skills on both client and server sides
•Experience with Node.js BFFs and a modern framework such as NestJS, Fastify, Hono, or Express
•Hands-on knowledge of designing RPC-style APIs
•Solid SQL skills, including writing queries against materialized views
•Comfortable with Git-based workflows and code review as a core practice
•Effective use of AI coding tools such as Claude Code, Cursor, and Copilot, with the judgment to verify their output
•English proficiency at Upper-Intermediate (B2) or higher
Nice to have
•React Native brownfield integration, fintech, banking or regulated-environment experience
•OTA update tools (Stallion, Hot Updater, CodePush, Expo Updates)
•Go
Conditions
•B2B cooperation

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