<aside> 💡 To be eligible for this position, candidates must have legal residency within the European Union / UK or hold digital nomad status. We value diversity and welcome applications from individuals of all backgrounds and experiences.

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Job Summary

About 3F Venture 3F Venture (https://3f.lu) is a Luxembourg-based venture studio focused on simplifying business operations for small and medium-sized enterprises (SMEs) in Luxembourg and the European Union through innovative technology, including AI-powered solutions. We are building a next-generation AI platform to help lawyers search, understand, and draft legal documents efficiently. Join us to shape the future of legal-tech and make a lasting impact on the SME market. We are looking for a full-stack AI engineer who can manage everything from GPU clusters to GDPR compliance and is ready to grow from a key employee to a Co-Founder. If you are excited to build, lead, and shape the future of legal-tech at 3F Venture, we want to hear from you!

Mission As a Lead AI Engineer at 3F Venture, you will take ownership of the technology stack and roadmap for our AI-powered legal assistant platform. Starting as a key employee, you will lead the development of our MVP with enterprise-grade security and scalability. Based on your performance and contributions, you will have the opportunity to become a Co-Founder, shaping the company’s vision and future.

Job description

Initial Role and Responsibilities

• Technology Implementation: Execute architectural decisions and stack setup, balancing speed and long-term reliability.
• LLM / RAG Development: Design and implement Retrieval-Augmented Generation (RAG) pipelines, optimize and fine-tune LLMs.
• Data Processing and ETL: Build and manage the data ingestion pipeline: PDFs/Word/scans → OCR → parsing → vectorization
• DevOps and SecOps: Set up CI/CD, Infrastructure as Code (IaC), and monitoring; implement security best practices (encryption, access control, auditing).
• Team Collaboration: Work with a small engineering team (1–2 week sprints) and participate in hiring and mentoring as the team grows.
• Cost Optimization: Monitor and optimize costs for storage, GPU compute, and cloud services.

Requirements:

• 5+ years of professional software development experience, including 2+ years in a leadership role (e.g., Tech Lead, Engineering Manager).
• Advanced Python skills and hands-on experience with RAG frameworks (e.g., LangChain, LlamaIndex).
• Experience deploying LLMs (OpenAI, Llama 3, Mistral) in production, including finetuning and optimization (LoRA/QLoRA, quantization, vLLM).
• Proficiency in building ETL pipelines for unstructured documents and experience with OCR (Tesseract, PaddleOCR).
• Knowledge of vector databases (Qdrant, Milvus, Pinecone) and search engines (Elastic/OpenSearch); understanding of hybrid retrieval.
• Experience with containers and orchestration (Docker + Kubernetes or equivalent).
• Proven track record of implementing security and compliance measures (encryption, RBAC/ABAC, GDPR, ISO-27001).
• Fluency in English (B2+).

Path to Co-Founder Role