AI Systems Engineer (RAG & LLM)

Description

Job Summary: We are seeking an AI Systems Engineer to integrate AI models into products, design and build robust and scalable systems for enterprise contexts, with a focus on RAG and LLM. Key Highlights: 1. Integration of AI models into challenging products 2. Development of robust and scalable RAG and LLM systems 3. Creation of an AI-powered legal assistant As an **AI Systems Engineer (RAG \& LLM Systems)** at imDigital, you will join challenging projects focused on integrating AI models across various imDigital/NordAngle products. We seek someone who goes beyond simple *prompt engineering* — someone capable of designing and building robust, secure, scalable systems ready for real-world enterprise contexts. The first challenge involves implementing a **Retrieval\-Augmented Generation (RAG)** system on our law firm management platform, yurix.pt. The goal is to create an intelligent legal assistant capable of: * performing semantic search over legislation and case law; * summarizing legal documents; * supporting tasks related to legal analysis and content generation. You will engage with real-world challenges in: * multi\-tenancy; * data security and privacy; * integration of LLMs; * RAG architecture; * AI agents; * observability and scalability. We have several additional challenges planned on our roadmap and highly value individuals with critical thinking, initiative, and the drive to propose novel solutions and products. If you want to build AI that truly works in enterprise settings, get in touch with us. **About You:** Requirements * Solid Python experience * Practical experience with LLMs in production * Prior implementation of RAG systems * Experience with at least one Vector DB (e.g., pgvector, Pinecone, Weaviate, Milvus, Qdrant, Elastic/OpenSearch) * Experience with REST APIs (FastAPI or similar) * Knowledge of Docker * Fluent in English * Ability to work collaboratively in a team Differentiating Factors: * 2\+ years working with LLM systems in production * 3\+ years working with backend/data systems in production * At least one end\-to\-end implemented RAG project Behavioral Profile: * Excellent oral and written communication skills * Strong interpersonal skills and client orientation * High degree of organization, responsibility, and results focus * Initiative and critical thinking **About imDigital:** Our Values * AGILITY and execution speed * TRANSFORMATION by bridging organizations and innovative solutions * SATISFACTION and customer focus, efficiency, value creation * HUMILITY to acknowledge mistakes and maintain a mindset of continuous learning * TEAMWORK — together we become more than the sum of our parts * COST\-CONSCIOUSNESS, going the extra mile, commitment to the company * WELL\-BEING — doing what you love while balancing personal and professional life * EQUALITY of opportunity, regardless of gender, religion, age, etc. Work Arrangement We believe in balancing personal and professional life. Therefore, we offer a hybrid work model: * 2 days per week in the office with your team. * Remaining days are optional — choose between remote work or working from the office, based on your preference. We have more than one open position, and compensation will be adjusted according to demonstrated experience and competencies. We are also open to *part\-time* or hybrid collaboration models, especially for candidates affiliated with academia, research, or those wishing to combine this opportunity with research or teaching projects. Where We Are: We are located in the heart of Porto, on Rua Sá da Bandeira, adjacent to major transport hubs such as São Bento and Trindade stations; therefore, on office days, we encourage using public transportation — good for your wallet, the environment, and your health! Send your application and CV to: **\** You may find the original job posting at: https://www.itjobs.pt/oferta/513282/ai\-systems\-engineer\-rag\-llm