AI Engineer

You are a hands-on AI Engineer who builds and ships intelligent, user-centric solutions. With expertise in LLMs, data pipelines, and modern engineering practices, you design and deploy scalable AI-powered applications. You work across the full AI stack; from data and prompt design to model tuning, RAG, and agentic workflows. You care deeply about AI-driven UX, creating intuitive, reliable experiences while managing context, latency, and evaluation. At Modus Digital, you’ll collaborate with a global team to deliver cutting-edge solutions; including conversational AI, automation, and agent-based systems that drive real impact. Modus Digital is an independent company of Advisors & Creators for the world’s leading brands. We define strategies that drive businesses forward and create experiences that people love. We believe digital experiences are human experiences, technology is transformative, and real innovation yields real results. We’re headquartered in New York City with offices throughout the United States, Latin America, Europe, and the Asia Pacific region. Our AI Engineer is an integral part of our Engineering team, working across a wide range of clients and projects. An AI Engineer at Modus typically reports to a Director, AI & Engineering and above. Responsibilities Build AI-powered solutions for client projects, from discovery through production Integrate AI models (OpenAI, open-source LLMs, etc.) into production systems and APIs Develop and optimize prompts, retrieval systems (RAG), and agent-based workflows Implement guardrails, observability, and monitoring for AI systems Optimize performance, latency, and cost of AI applications Rapidly prototype solutions to validate ideas and demonstrate value to clients Document approaches, experiments, and system architecture clearly Work cooperatively with Modus project and account managers, designers, engineers, and other team members, as required Report progress/updates and/or communicate with other team members, project leads, and our clients, as required Other duties related to the position that may arise from time to time and as may be assigned Qualifications 5+ years of experience in software engineering, machine learning, or related fields Strong programming skills in Java script and TypeScript for integration Hands-on experience with LLMs and modern AI tools and frameworks (e.g., OpenAI APIs, LangChain, vector databases) Understanding of RAG architectures, embeddings, and semantic search Experience integrating AI into full-stack applications (APIs, frontends, backend services) Familiarity with cloud platforms (AWS preferred) Strong (English) communication skills with the ability to explain AI concepts to non-technical stakeholders and clients You’re located in Buenos Aires and are willing to work from our office at least 2 times a month (hybrid schedule) Nice to Have Familiarity with LLM observability tools like Langfuse. Experience with evaluation frameworks and prompt testing methodologies Experience building AI agents or automation workflows Understanding of data pipelines for AI native formats Benefits For a complete list of employee benefits, refer to your local Employee or Contractor Handbook, as appropriate