Mid-level Java Engineer (AI Agents, MCP)
Contract: B2B, Full-time or Part-Time (from 15-20 hours/week)
Location: 100% Fully Remote
Start Date: Immediate
Polish language required
🚀 The Opportunity
We are seeking a highly skilled Mid-Level Java Engineer for a critical B2B contract.
You will be a key developer building a new MCP (Model Context Protocol) Server for a leading global insurance company. This is a cutting-edge role. Instead of a traditional backend, you will be building the server-side implementation of the Model Context Protocol, a new open standard for AI. Your work will create the secure, standardized "tools" and "resources" that enable the company's proprietary AI agents to interact safely and effectively with live enterprise systems, databases, and APIs. If you are passionate about building the real-world plumbing that connects next-generation AI to enterprise data, this is the role for you.
💻 What You'll Be Doing
- Design & Build: Architect and develop a high-availability, scalable MCP Server using Java 17+ and Spring Boot.
- Implement the MCP Standard: Utilize the Spring AI MCP integration (or the core Java SDK) to expose internal data sources (databases, filesystems) and business logic (APIs) as "tools" and "resources" for the AI agent.
- Develop Data Contracts: Define and implement the JSON-RPC 2.0 and Server-Sent Events (SSE)-based transport layer for the protocol (Spring WebFlux or WebMVC)
- API & Data Integration: Create robust connectors (e.g., REST, gRPC, Kafka consumers) to wrap existing internal insurance systems, making them securely accessible to the MCP server.
- Collaborate: Work directly with the client's AI and data science teams to define the capabilities, schemas, and API contracts the AI agent needs to perform its tasks.
- Ensure Quality: Write clean, testable, and efficient code, ensuring the platform meets the high-security and reliability standards of the financial services industry.