Senior Fullstack Engineer (Fintech)

TL;DR

Senior Fullstack Engineer (Fintech): Building real-time trading interfaces and internal Node.js services with an accent on streaming market data and AI-powered tooling. Focus on optimizing high-load data streams, implementing gRPC/WebSocket communication, and developing LLM-powered engineering agents.

Location: Worldwide Remote

Salary: $4,500–$6,000 per month gross

What you will do

• Build real-time trading interfaces based on streaming market data and develop internal Node.js services.
• Implement solutions using TypeScript, React, RxJS, Node.js, gRPC, WebSocket, PixiJS, AG Grid, and Ant Design.
• Develop internal AI tooling, including MCP server tools and LLM-powered CI agents for engineering workflows.
• Ensure the quality and reliability of solutions through automated testing.
• Document technical decisions and implemented modules.
• Maintain and improve systems based on business needs and feedback.

Requirements

• 5+ years of professional full-stack development experience with senior-level expertise in React, strict TypeScript, and Node.js.
• Production experience working with WebSocket and gRPC.
• Expertise in reactive data streams, frontend/backend optimization, and memory management for high-load grids.
• Experience designing architecture for data storage, delivery, and pagination.
• Practical experience building developer-facing LLM tools or agent-based automations (e.g., MCP servers, LLM skills).
• English: B2 or higher required.

Nice to have

• Experience in the trading or fintech domain.
• Knowledge of observability tools: Prometheus, Grafana, Loki.
• Experience with PixiJS, WebGL, or Playwright.