[Hiring] Mid-level Java Engineer @Exerizon

Role Description

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.

Qualifications

• 3-5+ years of professional experience in Java development
• Strong command of Java 11/17+
• Deep expertise in the Spring Framework (especially Spring Boot)
• Experience with or strong understanding of reactive principles and frameworks (e.g. Spring WebFlux)
• Proven experience in designing, building, and securing scalable RESTful APIs and microservices
• Strong proficiency with SQL (e.g., PostgreSQL) or NoSQL databases
• Experience with message brokers (e.g., Kafka, RabbitMQ)
• Excellent communication skills
• Discipline to work effectively in a remote, part-time, and independent B2B contract setting

Requirements

• Architect and develop a high-availability, scalable MCP Server using Java 17+ and Spring Boot
• 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
• Define and implement the JSON-RPC 2.0 and Server-Sent Events (SSE)-based transport layer for the protocol (Spring WebFlux or WebMVC)
• Create robust connectors (e.g., REST, gRPC, Kafka consumers) to wrap existing internal insurance systems, making them securely accessible to the MCP server
• 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
• Write clean, testable, and efficient code, ensuring the platform meets the high-security and reliability standards of the financial services industry

Benefits

• 100% Fully Remote
• Contract: B2B, Full-time or Part-Time (from 15-20 hours/week)
• Start Date: Immediate
• Polish language required

Nice to Haves

• Direct experience with the Model Context Protocol (MCP) itself
• Experience with Spring AI, LangChain, or other AI orchestration frameworks
• Familiarity with the Azure cloud platform and containerization (Docker, Kubernetes)
• Prior experience in the insurance or financial services industry