Next-Link - Senior AI Engineer

AI Developer is needed in Barcelona, Spain.

Client: Next-Link

Location: Barcelona, B, es

Contract: Freelance

Job Description

This is a remote position. We are looking for a Senior AI Engineer / Agent Developer to join our consulting team and collaborate closely with one of our key clients in the pharmaceutical sector.

You will contribute to a strategic Data & Analytics initiative focused on building an enterprise-grade conversational analytics agent for governed clinical data, combining Generative AI, agentic systems, advanced analytics, and data governance.

Scope & Main Responsibilities:

• Design and develop a conversational analytics agent covering natural-language understanding, text-to-SQL, query execution, answer synthesis, explainability and source citation.
• Implement LLM agent architectures and orchestration patterns such as ReAct, plan-and-execute, or multi-agent workflows.
• Build guardrails for hallucination prevention, traceability, scope enforcement, and responsible AI.
• Integrate the agent with Snowflake, semantic-layer assets, business glossaries, and KPI definitions.
• Implement secure data-access controls including RBAC and row-level security.
• Define and maintain structured AI evaluation frameworks covering SQL correctness, answer faithfulness, regression and drift.
• Implement observability, tracing and performance monitoring for agent behavior, latency, token usage, and errors.
• Establish CI/CD and automated regression testing for prompts, agent configurations, and semantic artifacts.
• Collaborate with Data, Platform, AI Governance, and Clinical Analytics teams.

Requirements

• Fluent English.
• Strong experience building LLM-based applications, text-to-SQL, or conversational analytics solutions.
• Strong hands-on experience with Python and advanced SQL.
• Experience with LLM patterns including prompt engineering, function calling, tool use, and agent orchestration.
• Experience with Snowflake and familiarity with Snowflake Cortex capabilities.
• Experience with LangGraph or similar agent frameworks.
• Familiarity with evaluation tools such as Ragas or DeepEval and observability platforms such as LangSmith, Weights & Biases, Arize or equivalent.
• Experience working in regulated or governance-first environments, including RBAC, auditability, and responsible-AI controls.
• Strong software-engineering, testing, and CI/CD practices.
• Experience within pharma, healthcare, life sciences, or another regulated industry is highly valued.

Additional Information

This role is specifically tailored for collaboration with a key client in the pharmaceutical sector, highlighting the importance of experience in regulated environments.