AI Engineer (Agentic Systems Backend)

TL;DR

AI Engineer (Agentic Systems & Backend): Design and build production-grade agentic AI systems for conversational experiences with an accent on context engineering, tool use, planning, reasoning, and multi-agent collaboration. Focus on integrating LLMs into scalable backend architectures, implementing evaluation frameworks, observability, and guardrails for reliable production deployment.

Location: Barcelona or Madrid, Spain. Hybrid work model with flexibility to work remotely or from office. Eligibility to work in Spain required.

Company

hirify.global is a product-driven, engineering-led platform for building tailored AI agents that handle lead generation, sales, customer support, and GTM operations.

What you will do

• Co-define technical vision for agentic systems including autonomous agents, multi-agent collaboration, planning, and execution.
• Design agentic architectures, context engineering, tool use, reasoning loops, and integrate LLMs into backend systems.
• Build LLM evaluation systems, observability with tracing/logging/debugging, and guardrails for production reliability.
• Develop scalable backend architectures, APIs, services, and data pipelines supporting AI workloads.
• Mentor engineers, participate in architectural reviews, and collaborate with product, data, and design teams.

Requirements

• Proven hands-on experience shipping LLM-powered features to production.
• Experience with modern LLMs (OpenAI, Anthropic, Google, open-source), agentic architectures, context engineering, and RAG.
• Full lifecycle knowledge: experimentation, evaluation, deployment, monitoring; designing evaluation frameworks.
• Strong backend engineering with scalable architectures, APIs, DDD, and trade-offs in performance/reliability/cost.
• Fluent in English and Spanish. Eligibility to work in Spain.
• Comfortable in ambiguity, product-minded, with mentoring experience.

Culture & Benefits

• Human-first culture emphasizing empathy, trust, adaptability, customer-centricity, and collaboration.
• Hybrid flexibility, flexible hours, 26 paid days off plus birthday, training budget.
• Transportation ticket, language lessons, flexible compensation via Cobee, team-building, referral bonuses.

Hiring process

• HR interview (30 min) to discuss experience and hirify.global details.
• Engineering Director interview (45 min) on background and product mindset.
• Team interview (120 min) on technical experience, problem-solving, system design, collaboration.
• Founders meeting (30 min) for vision and values alignment.