Agent Builder - Freelance

The role

You will design, build, and scale production-grade AI systems at the intersection of Software Engineering, Machine Learning, and Generative AI. You will develop agentic systems and platform capabilities for Mirakl customers and internal teams.

What you will do

• Design, build, and deploy production-grade AI systems for internal operations
• Develop solutions leveraging LLMs, RAG, AI Agents, Multimodal AI and Evaluation frameworks
• Architect complex agentic workflows including tools, memory, retrieval, planning, and guardrails
• Rapidly prototype new capabilities and evolve them into scalable, reliable AI production systems
• Connect AI systems to internal platforms, business applications, and data sources
• Enable AI agents to interact with systems such as CRM, data platform, Drive, Jira, support tools, and internal knowledge bases
• Design robust orchestration layers between models, APIs, tools, retrieval systems, and business workflows
• Partner with end users, business teams, Product Managers, and Engineers to identify high-value opportunities for AI
• Run pilots and experiments, gather feedback, and measure business impact
• Implement evaluation frameworks, guardrails, validation layers, and monitoring systems

Required qualifications

• Strong engineering mindset
• Strong AI expertise
• Strong product mindset
• Python and SQL
• OpenAI, Anthropic, Gemini, Mistral and Open-source models
• LangGraph, LangChain, LlamaIndex, MCP and Vector Databases
• AWS or GCP, Docker and Kubernetes
• Strong communication skills in English

Nice to have

• 5+ years of experience in Software Engineering, ML Engineering, Applied AI, or related fields
• Strong Python and software engineering fundamentals
• Hands-on experience building production AI systems using LLMs, RAG, and AI Agents
• Experience designing multi-step agentic workflows and retrieval systems
• Experience evaluating AI systems and improving model performance
• Experience deploying and operating production services in cloud environments
• Curiosity, pragmatism, and passion for building AI products

Before you apply

• 30-40 min phone conversation with a Tech recruiter
• 1h30 technical discussion with Data Science and Engineering Team
• 2 x 45-minute STAR interviews with colleagues

About the company

Mirakl is a marketplace innovation company that provides an operating system combining enterprise marketplace solutions, AI-powered multichannel selling, retail media, and agentic commerce infrastructure. Founded in 2012, it has dual headquarters in Boston and Paris.