Senior AI-Native Full-Stack Developer

Engg; Poland; On-site; PLN 200,000 - 320,000; Full time

Job summary

Xebia is seeking a senior full-stack developer to join a small product team building an AI-powered autonomous accounting platform for small businesses and accountants. You will own features end-to-end — from idea to API, data model, and customer view. Build AI agents and workflows in production, not pilots.

You will lead backend and frontend work, ship reliable AI-powered workflows, and collaborate with product, engineering, and domain experts to turn ideas into customer-ready features.

Qualifications

• 6+ years of commercial experience in fullstack software development.
• Backend: Node.js + Express, strong command of TypeScript.
• Frontend: React and Next.js (SSR/SSG, App Router).
• Designing and building REST APIs (GraphQL a plus).
• PostgreSQL, data modeling and query optimization.
• Testing: unit and integration tests (Jest/Vitest).
• CI/CD and containerization (Docker).
• Experience with the cloud (AWS / GCP / Azure).
• Hands-on AI/LLM production experience: API usage, tool calling, streaming, or agent workflows.
• AI-native: experience with AI development tools (Cursor, GitHub Copilot, Claude Code).
• Ability to verify, debug, and refactor AI-generated code.

Responsibilities

• Build and improve the product experiences for small business owners and accountants.
• Develop backend services and integrations with accounting systems.
• Design and ship reliable AI-powered workflows and agent-driven features.
• Improve reliability, performance, and code quality.
• Collaborate with product, engineering, and domain experts to deliver value to customers.

Skills

Node.js

Express

TypeScript

React

Next.js

REST APIs

PostgreSQL

Data modeling

Jest/Vitest

CI/CD

Docker

AWS

GCP

Azure

AI/LLM production

Tool calling

Cursor

GitHub Copilot

Claude Code

Playwright

Cypress

Tools

Docker

Nx/Turborepo

Playwright

Cypress

GitHub Copilot

Cursor

Claude Code

Prisma

TypeORM

MongoDB

Redis

Job description

Xebia is seeking a senior full-stack developer to join a small product team building an AI-powered autonomous accounting platform for small businesses and accountants. You will own features end-to-end — from idea to API, data model, and customer view. Build AI agents and workflows in production, not pilots.

You will lead backend and frontend work, ship reliable AI-powered workflows, and collaborate with product, engineering, and domain experts to turn ideas into customer-ready features.