AI Systems Engineer (RAG & LLM)

Description

Job Summary: We are seeking an AI Systems Engineer to integrate AI models into products, and design and build robust, scalable systems for real-world challenges. Key Highlights: 1. Challenging projects focused on integrating AI models 2. Designing and building robust, secure, and scalable systems 3. Exposure to real-world multi-tenancy and data security challenges 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 enterprise contexts. The first challenge involves implementing a **Retrieval-Augmented Generation (RAG)** system on our legal office 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 encounter 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 in our roadmap and highly value individuals with critical thinking, initiative, and the drive to propose new 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 1 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 — bridging organizations and innovative solutions * SATISFACTION — customer focus, efficiency, and value creation * HUMILITY — acknowledging mistakes and maintaining a continuous learning mindset * TEAMWORK — together we become more than the sum of our parts * COST AWARENESS — going the extra mile, commitment to the company * WELL-BEING — doing what you love while balancing personal and professional life * EQUALITY — equal opportunities 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, next to major transport hubs such as São Bento and Trindade stations; thus, on office days, we encourage the use of public transportation — good for your wallet, the environment, and your health! Send your application and CV to: **\** Original job posting available at: https://www.itjobs.pt/oferta/513282/ai\-systems\-engineer\-rag\-llm