Senior Fullstack Engineer (Node.js, React, AI)

100% remote

B2B: 180-210 PLN/h netto + VAT

Responsibilities

• Build and evolve a backend-heavy full stack architecture for an AI-native enterprise SaaS product.
• Design and deploy scalable services on Google Cloud Platform (GCP), including Cloud Run, BigQuery, and GCS.
• Develop responsive and modular interfaces using React, TailwindCSS, and Zustand.
• Implement micro-frontends, Module Federation, robust APIs, and secure authentication flows (OAuth2, SSO).
• Work with Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), and autonomous AI agents to power intelligent workflows.
• Ensure fault tolerance, observability, and performance through CI/CD pipelines and infrastructure automation.
• Partner with product, design, and infrastructure teams to shape roadmap and delivery.
• Foster a strong engineering culture and mentor junior developers.

Requirements

• 8+ years of professional software engineering experience with a focus on modern full stack development
• Strong backend development skills using Node.js and NestJS
• Proficiency in frontend technologies including React, TailwindCSS, and Zustand
• Solid understanding of micro-frontend architecture, module federation, API design, and middleware
• Hands-on experience with Google Cloud Platform (GCP), especially Cloud Run, BigQuery, and GCS
• Familiarity with CI/CD pipeline setup and maintenance
• Knowledge of security protocols including OAuth2, SSO, and authentication flows
• Experience working with Large Language Models (LLMs) and Retrieval-Augmented Generation (RAG)
• Understanding of autonomous AI agents and agent-to-agent communication

What we offer

• 100% remote
• Life insurance
• Private healthcare
• Multisport card
• PowerYou – e-learning platform