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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # MCP Engineer / AI Backend Engineer - **Company:** Ruby Labs - **Location:** Eu, France (Remote available) - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, User Authentication, Business Systems, Software Quality, Relational Databases, Software Debugging, Programming Tools, JSON, PostgreSQL, Node.Js, Next.js, Systems Integration, TypeScript, Data Logging, Application Enhancement Tool, Large Language Models, Prompt Engineering, Backend, Build Management, Kubernetes, Production Code, Cloudflare, NestJS, Restful APIs, Network Server, Automation Anywhere, Api Management, Serverless Computing - **Published:** May 27, 2026 - **Apply:** https://fr.indeed.com/viewjob?jk=ce8084e47b7b2aff ## About the Role Do you have experience in TypeScript?, * Strong experience with TypeScript * Strong experience with Node.js * Experience building backend services or APIs * Experience with at least one backend framework, such as Hono, Fastify, NestJS, or Next.js backend/API routes * Experience with Cloudflare Workers or similar serverless/edge environments * Good understanding of REST APIs, JSON, authentication flows, logging, and error handling * Experience building integrations between services and APIs * Interest in AI tools, LLMs, and automation * Experience with prompt engineering or AI workflow design * Ability to write clean, maintainable, production-quality code * Strong debugging skills * High ownership mindset and ability to work independently Strong Plus * Experience with MCP / Model Context Protocol * Experience building MCP servers or MCP clients * Experience with OpenAI, Anthropic, Claude, or similar LLM APIs * Experience designing tool-based AI workflows * Experience with Cloudflare KV, Durable Objects, Queues, R2, or D1 * Experience with PostgreSQL or other relational databases * Experience with internal developer platforms or automation tools * Experience with agentic workflows, function calling, or tool execution systems * Experience with payments, fintech, checkout flows, or orchestration platforms * Experience building production AI features, not only experimenting with prompts How You Work You are an engineer who enjoys building practical systems that solve real problems. You can move between backend code, AI workflows, infrastructure, logs, and documentation. You understand that AI-powered systems need strong engineering foundations: clear interfaces, good observability, predictable behavior, and reliable error handling. You are comfortable working with unclear requirements, turning them into working systems, and improving them through iteration. You care about code quality, but you are also pragmatic and focused on delivering useful tools that people actually use. You are comfortable working independently in a remote environment and taking ownership of technical decisions. ## Description We are looking for an MCP Engineer / AI Backend Engineer who will design, build, and maintain MCP-based services and AI-powered backend systems. This role combines TypeScript, Node.js, Cloudflare Workers, backend engineering, AI tooling, and prompt engineering. You will be responsible for developing production-ready MCP infrastructure, building backend services, integrating AI tools into internal workflows, and making AI-powered systems reliable, scalable, and easy to use. About the Role You will work on the development of MCP-based infrastructure and AI backend services used by internal teams and products. You will work across: * MCP servers and clients * TypeScript / Node.js backend services * Cloudflare Workers * Backend frameworks such as Hono, Fastify, NestJS, or Next.js backend routes * AI workflows and prompt engineering * Internal automation systems * API integrations * Developer tooling You will work closely with backend engineers, product managers, and internal stakeholders to build reliable AI-powered tools and backend systems., * Design, build, and maintain MCP servers and MCP-based integrations * Implement MCP tools, resources, prompts, and backend interfaces * Build reliable communication between AI agents, tools, and backend systems * Define clean contracts for MCP tools and services * Improve the stability, predictability, and maintainability of MCP infrastructure * Test MCP tool behavior across different usage scenarios * Monitor and improve the quality of AI-tool interactions Backend Development * Build and maintain backend services using TypeScript and Node.js * Work with backend frameworks such as Hono, Fastify, NestJS, and Next.js backend/API routes * Implement REST APIs, internal endpoints, service-to-service integrations, and automation flows * Work with authentication, request validation, error handling, logging, and observability * Design clean, maintainable backend architecture for internal and production-facing systems * Write production-quality code with clear structure and good error handling Cloudflare Workers * Build and deploy backend services on Cloudflare Workers * Work with edge runtime limitations and best practices * Design lightweight, performant services for edge/serverless environments * Debug issues related to worker execution, routing, request handling, and deployment * Use Cloudflare services when needed, such as KV, Durable Objects, Queues, R2, or D1 * Optimize backend services for performance, reliability, and cost efficiency AI & Prompt Engineering * Build AI-powered workflows and internal automation tools * Design prompts, system instructions, and tool definitions for reliable AI behavior * Improve the quality, consistency, and predictability of AI outputs * Analyze AI workflow failures and improve prompts, context, or tool contracts * Structure data and context for better LLM performance * Build testable AI workflows that can be evaluated and improved over time * Work with LLM APIs such as OpenAI, Anthropic, Claude, or similar providers Integrations & Automation * Build integrations between internal systems, APIs, and AI tools * Automate repetitive operational or engineering workflows * Design backend flows that connect AI agents with real business systems * Ensure integrations are secure, observable, and maintainable * Build internal utilities and developer tools when needed, * Investigate and fix issues across MCP servers, backend services, Cloudflare Workers, AI workflows, and API integrations * Improve logging, monitoring, and observability for AI/backend systems * Identify root causes of unreliable tool behavior or incorrect AI outputs * Make systems easier to debug, test, and maintain * Document technical decisions and implementation details clearly, As an MCP Engineer / AI Backend Engineer, you will play a key role in developing MCP infrastructure, AI-powered backend services, and internal automation tools that help teams work faster and more effectively. ## Related Videos - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Tips and Tricks for Working with JSON](https://www.wearedevelopers.com/videos/1229-tips-and-tricks-for-working-with-json) - [MCP Mashups: How AI Agents are Reviving the Programmable Web](https://www.wearedevelopers.com/videos/1392-mcp-mashups-how-ai-agents-are-reviving-the-programmable-web) - [Next, Nest, Nuxt… Nust?](https://www.wearedevelopers.com/videos/421-next-nest-nuxt-nust) - [Streaming AI Responses in Real-Time with SSE in Next.js & NestJS](https://www.wearedevelopers.com/videos/1630-streaming-ai-responses-in-real-time-with-sse-in-next-js-nestjs) ## Related Articles - [Everything a Developer Needs to Know About MCP with Neo4j](https://www.wearedevelopers.com/magazine/604-everything-a-developer-needs-to-know-about-mcp-with-neo4j) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 212: WebMCP or MCP, What is DevRel, AI's 10% Productivity Boost, and a 49MB Web Page…](https://www.wearedevelopers.com/magazine/717-dev-digest-212-webmcp-or-mcp-what-is-devrel-ai-s-10-productivity-boost-and-a-49mb-web-page) - [Dev Digest 210: AI Agents Are Go! 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