Overview In this role you will help build and scale Factorial's AI-driven Finance domain, transforming how invoices, payments, and analytics are handled. You'll own end-to-end impact, from problem definition to measuring real outcomes, not just coding. You'll contribute to an AI platform that automates core finance workflows and supports cross-functional teams. This is a fast-moving, hands-on role focused on delivering tangible value through probabilistic, AI-enabled features.

Compensaciones / Incentivos Alan private health insurance

Wellhub gym access

Cobee expense management

Language classes

Breakfast in the office and organic fruit

Food discounts with Nora

Responsabilidades Design system architectures for multi-agent AI features

Write high-level prompts to guide multi-agent code generation

Review and validate AI-generated outputs for security, scalability, and structure

Orchestrate parallel AI agents to ensure coherent feature outputs

Define workflows and experiment with new approaches; share findings with the team





Assist in transitioning teammates from deterministic to probabilistic thinking

Requisitos principales 4+ years in software engineering

Experience shipping AI-powered features with production evaluation

Comfort reviewing agentic workflows and understanding LLM tradeoffs

Ability to break down non-deterministic outputs for the team to reason about

Proficiency in Ruby on Rails and React; experience integrating AI models into cloud-native environments

Ability to explain complex technical decisions in clear English

Owns end-to-end AI feature lifecycle: build, deploy, measure, adjust

Collaborative mindset

Problem-solving and curiosity

Clear communicator who can explain complex ideas to non-engineers

AI feature development and evaluation in production

Agentic/workflow design with multi-agent systems

LLM architecture tradeoffs

📌 Senior Product Engineer - Finance Domain (Barcelona)
🏢 Factorial Hr
📍 Barcelona