> Markdown version of [/jobs/ext/3394372-senior-product-engineer-finance-domain-factorial-hr](https://www.wearedevelopers.com/jobs/ext/3394372-senior-product-engineer-finance-domain-factorial-hr). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Product Engineer - Finance Domain - Factorial Hr - **Company:** Factorial Hr - **Location:** Barcelona, Spain - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Cloud Computing, Code Generation, Ruby on Rails, Software Engineering, Systems Integration, ReactJS, Large Language Models, Multi-Agent Systems, AI Platforms - **Published:** September 13, 2026 - **Apply:** https://www.buscojobs.com.es/senior-product-engineer-finance-domain-factorial-hr-en-barcelona-ID-373506661 ## About the Role Compensaciones / Beneficios 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 theteam 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 ## Description 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 / Beneficios 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 theteam 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 ## Related Videos - [Agentic employees in world's most downloaded FinTech app](https://www.wearedevelopers.com/videos/100123-agentic-employees-in-world-s-most-downloaded-fintech-app) - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [This App Reached 10,000 Users in One Week. Here's How.](https://www.wearedevelopers.com/videos/100329-this-app-reached-10-000-users-in-one-week-here-s-how) - [Coffee with Developers: David Heinemeier Hansson](https://www.wearedevelopers.com/videos/875-coffee-with-developers-david-heinemeier-hansson) - [From AI Assistance to Agentic Systems: Scaling Sovereign AI in Banking](https://www.wearedevelopers.com/videos/100070-from-ai-assistance-to-agentic-systems-scaling-sovereign-ai-in-banking) - [Agentic AI - From Theory to Practice: Developing Multi-Agent AI Systems on Azure](https://www.wearedevelopers.com/videos/1532-agentic-ai-from-theory-to-practice-developing-multi-agent-ai-systems-on-azure) ## Related Articles - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Dev Digest 132 - Binging WADFlix?](https://www.wearedevelopers.com/magazine/473-dev-digest-132-binging-wadflix) - [How to Become an AI Engineer](https://www.wearedevelopers.com/magazine/331-how-to-become-an-ai-engineer) - [ I Gave a Video Editor More Autonomy Than a Trading Bot. On Purpose.](https://www.wearedevelopers.com/magazine/773-i-gave-a-video-editor-more-autonomy-than-a-trading-bot-on-purpose)