Senior Software Engineer, Applied AI (Spain)

You will join a small, highly autonomous cross-functional team to build AI agents that fundamentally transform how operations work at scale. Instead of writing bespoke software for every workflow, we are developing an agent platform that can read operational knowledge, reason about it in context, and execute tasks end-to-end. This approach allows us to scale complexity through knowledge and reasoning, rather than simply through code.

Responsibilities

Design, build, and own core components of the agent platform, from the orchestration layer to the tool integrations connecting it to internal systems; Build and evolve the capabilities layer: APIs, data access patterns, and service integrations for agents to execute operational workflows; Architect the knowledge and memory infrastructure, allowing agents to retrieve the data and act across our systems; Design and implement the trust and safety framework, including audit trails, human-in-the-loop controls, and guardrails for safe and auditable AI-driven operations; Contribute to agent evaluation and testing infrastructure, defining how we measure accuracy, reliability, and regression across agent behaviors; Partner directly with Operations to understand workflows, identify automation opportunities, and translate process knowledge into agent capabilities; Mentor other engineers on the team as it grows

Requirements

5+ years of backend engineering experience building and operating production systems; Hands-on experience with LLMs and AI agents (orchestration, RAG, tool/function calling, or similar); Strong API design and system integration skills; Product-minded: questions requirements and contributes to product decisions, not just execution; Proven ownership of complex projects in ambiguous, early-stage environments; Comfortable in a fast-paced, early-stage environment; Pragmatic with balance of quality and speed; Strong ownership mindset; Strong backend engineering fundamentals; Curious and eager to develop expertise in AI and LLMs

Benefits

Great benefits; Wellness program offerings; Company retreats; Ability to interact with and learn from leaders in the startup community