EU-Based Senior Java Backend Engineer — AI-Driven REST APIs

Poland and Eastern Europe; Town of Poland (NY); On-site; USD 69,000 - 104,000; Full time

Job summary

Xebia is seeking a Java backend developer to design, develop, and maintain scalable backend applications. You will implement REST APIs supporting critical services and integrate AI-enabled features into the backend, including AI agent workflows using modern frameworks.

Collaboration with AI specialists and engineers will be key to delivering production-ready solutions with clean, well-tested code. The role emphasizes leveraging AI-powered development tools, contributing to CI/CD, and delivering

Qualifications

• 5+ years of commercial Java development experience.
• Experience building and maintaining REST APIs and backend services.
• Experience with AI-assisted development tools (Claude Code, Kiro, Copilot, Cursor).
• Experience designing or implementing AI agents/workflows.
• Familiarity with AI frameworks/tech (LangGraph, FastMCP, MCP).
• Strong English communication (minimum B2).

Responsibilities

• Designing, developing, and maintaining backend applications using Java.
• Building and enhancing REST APIs for business-critical services.
• Developing AI-enabled features and integrating AI capabilities into backend apps.
• Designing and implementing AI agent workflows with modern frameworks.
• Collaborating with engineers and AI specialists to deliver scalable solutions.
• Writing clean, tested code and contributing to CI/CD processes.
• Leveraging AI-powered tools to improve productivity and quality.

Skills

Java backend development

REST API design

AI-assisted development tools

AI agents/workflows

AI frameworks (LangGraph, MCP, MCP)

English communication (B2)

Tools

Claude Code

Kiro

GitHub Copilot

Cursor

LangGraph

FastMCP

Model Context Protocol (MCP)

Job description

Xebia is seeking a Java backend developer to design, develop, and maintain scalable backend applications. You will implement REST APIs supporting critical services and integrate AI-enabled features into the backend, including AI agent workflows using modern frameworks.

Collaboration with AI specialists and engineers will be key to delivering production-ready solutions with clean, well-tested code. The role emphasizes leveraging AI-powered development tools, contributing to CI/CD, and delivering