Senior AI Engineer

TL;DR

Senior AI Engineer (AI R&D): Operate, maintain, and evolve AI systems including LLM-based services and agentic workflows with an accent on reliability, scalability, observability, and business impact. Focus on architecting complex prompts, curating knowledge contexts, evaluating models, and implementing governance guardrails in a regulated fintech environment.

Hybrid in Madrid or Barcelona

Company

hirify.global enables global companies to collect payments in 40 emerging markets as a payments processor and merchant of record.

What you will do

• Operate and maintain AI systems on AWS, ensuring reliability, scalability, and observability of LLM-based services and agentic workflows.
• Architect agent behavior with version-controlled prompts, personas, guardrails, and tool definitions.
• Curate knowledge context for agents and RAG systems, optimizing data chunking and metadata.
• Design and optimize AI workflows, including prompt libraries, skills repositories, and automation pipelines.
• Evaluate and benchmark AI models across quality, latency, cost, safety, and robustness.
• Implement automated evaluations with ground truth datasets and LLM-as-a-Judge pipelines.
• Drive experimentation cycles and implement governance, versioning, and access controls.

Requirements

• Bachelor’s degree in Computer Science, Engineering, or equivalent experience.
• 5+ years in ML Engineering, Data Science, AI Engineering, or Platform Engineering with production AI/ML systems.
• Expertise in LLMs, RAG, embeddings, prompt engineering, evaluation frameworks, and inference trade-offs.
• Experience with CI/CD for AI, model versioning, observability, and incident response.
• Strong analytical skills for comparing AI systems using metrics and platforms like LangSmith or Arize.
• Builder mentality for customizing AI systems, integrations, and no-code tools.
• Security and compliance awareness in regulated environments.

Culture & Benefits

• Flexible schedules focused on impact and productivity.
• Combine self-managed focus time with in-person collaboration in hubs.
• Referral bonus program and monthly social budget for team activities.
• hirify.global Houses for week-long global coworking rentals.
• Dynamic fintech environment with international team of 1000+ from 30+ nationalities.

Hiring process

• Talent Acquisition reviews CV and communicates updates via email at every step.
• Expect a structured candidate experience with feedback throughout.