We are seeking an exceptional Fullstack Engineer to build and enhance user-facing applications for a fast-growing B2B AI & SaaS company providing financial modeling and forecasting solutions for eCommerce brands. This role requires developing responsive, intuitive frontend interfaces using React while building robust backend APIs with Node.js that power real-time financial analytics and scenario planning tools. You will work with cutting-edge technologies to create seamless user experiences that help retail leaders make critical business decisions, directly impacting how leading eCommerce founders analyze performance and unlock profitable growth. Key Responsibilities: * Design and implement responsive, high-performance React applications for financial modeling and forecasting interfaces * Build robust Node.js backend APIs and microservices that integrate with data warehouses and AI-powered analytics * Develop real-time dashboard components and interactive data visualization tools for complex financial scenarios * Create seamless user experiences for financial reporting, scenario planning, and business performance analysis * Implement secure authentication, authorization, and data access patterns for sensitive financial information * Build integration layers connecting frontend applications with data pipelines, AI agents, and third-party eCommerce platforms * Optimize application performance for handling large datasets and complex financial calculations * Collaborate with product managers, designers, and data engineers to deliver customer-centric features * Ensure code quality, testing coverage, and deployment practices across the full technology stack
Requirements: * 3+ years (Mid) or 5+ years (Senior) of professional full-stack development experience * Strong expertise in React, including hooks, context, state management, and modern React patterns * Proficient in Node.js, Express.js, and building RESTful APIs and microservices architectures * Experience with TypeScript for both frontend and backend development * Solid understanding of database integration (SQL preferred, BigQuery/PostgreSQL experience a plus) * Knowledge of modern frontend build tools, testing frameworks (Jest, React Testing Library), and CI/CD practices * Experience with responsive design, cross-browser compatibility, and modern CSS frameworks * Understanding of authentication/authorization patterns and secure coding practices * Strong problem-solving skills and ability to work in a fast-paced startup environment * Excellent communication skills and collaborative approach to product development
Preferred Skills and Qualifications: * Experience building financial dashboards, analytics interfaces, or data-heavy business applications * Familiarity with data visualization libraries (D3.js, Chart.js, Recharts) and creating interactive charts * Knowledge of real-time data processing and WebSocket implementation for live dashboard updates * Experience with AI/ML integration, particularly building interfaces for AI-powered features and agents * Understanding of eCommerce platforms, financial modeling concepts, or business intelligence tools * Experience with cloud platforms (GCP preferred) and containerized deployment strategies * Knowledge of state management solutions (Redux, Zustand) and modern frontend architecture patterns * Comfortable using AI tools to accelerate development and enhance productivity
