> Markdown version of [/jobs/ext/3048348-ai-engineer-ai-agents](https://www.wearedevelopers.com/jobs/ext/3048348-ai-engineer-ai-agents). 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). --- # AI Engineer- AI Agents - **Company:** Sequra's Smart Agent - **Location:** Barcelona, Spain (Remote available) - **Contract:** Permanent contract - **Skills:** Clean Code Principles, Java (Programming Language), Agile Methodology, Artificial Intelligence, Python (Programming Language), Object-Oriented Software Development, Ruby on Rails, Workflow Management Systems, Test-Driven Development (TDD), Chatbots, Large Language Models, Multi-Agent Systems, Backend, Kotlin, Build Management, Low Latency, Front End Software Development, Virtual Agents, GPT, Elixir - **Published:** September 24, 2026 - **Apply:** https://www.adzuna.es/contact-us.html ## About the Role + 5+ years of experience as a Backend Engineer. + Experience in production-grade backend systems (Ruby on Rails preferred; Python, Kotlin, Java, Elixir, or JS also valued). + Strong knowledge of OOP, clean coding, TDD, and agile principles. + Experience with agentic systems or LLM-powered agents (RAG, workflow orchestration, chatbots). + English proficiency (Spanish nice to have). + Attitude, ownership, and pragmatic mindset-able to build backend systems that support AI agents without needing DS skills. Nice-to-have: + Located in Barcelona or willing to relocate. + Experience scaling backend services to high concurrency and low latency. ## Description We are building seQura's Smart Agent platform, an intelligent agent system that guides shoppers before, during, and after their purchases. The platform relies on LLMs for human-like interaction, combined with retrieval-augmented generation (RAG) over SeQura's data, crawling, and structured product/taxonomy information. This role does not require AI research, data science, or mathematical modeling-all AI/LLM frameworks are already in place. What matters is building solid, production-grade backend systems that allow these agents to reason over shopper needs safely and effectively. You will: + Build robust, scalable backend systems for agent workflows, handling context, state, and interactions. + Integrate AI agent capabilities with core platforms (payments, shopper accounts, risk, merchant services) safely and efficiently. + Use RAG frameworks and structured data to provide intelligent responses, without fine-tuning models. + Collaborate with Product, Frontend, Data, and AI teams to design systems and shape the shopper experience. What you will do + Design and build the backend foundations of seQura's Smart Agent platform to assist shoppers throughout the purchase lifecycle. + Transform ambiguous product ideas and shopper needs into reliable, scalable backend services. + Orchestrate agent workflows across multiple services, managing context, state, and interactions. + Integrate intelligent agent capabilities with core platforms safely and efficiently. + Contribute to architectural decisions with clarity and simplicity in mind. + Collaborate effectively with cross-functional teams, driving alignment and shared ownership. + Monitor, optimize, and improve production systems, ensuring high performance, availability, and reliability. What success look like: + The Smart Agent platform operates at scale, handling complex shopper interactions with reliability and speed. + Agents consistently find and act on the right context to guide shoppers effectively. + Backend systems are robust, maintainable, and integrated seamlessly with core services. + Strong collaboration across Product, AI, and Engineering teams, with clear ownership and accountability. ## Related Videos - [AI Agents & Agentic AI](https://www.wearedevelopers.com/videos/2017-ai-agents-agentic-ai) - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [Bringing digital education to refugee and host communities in remote regions of Africa](https://www.wearedevelopers.com/videos/644-bringing-digital-education-to-refugee-and-host-communities-in-remote-regions-of-africa) - [ Evaluating AI models for code comprehension](https://www.wearedevelopers.com/videos/1462-evaluating-ai-models-for-code-comprehension) - [On a Secret Mission: Developing AI Agents](https://www.wearedevelopers.com/videos/1510-on-a-secret-mission-developing-ai-agents) - [Why Kotlin is the better Java and how you can start using it](https://www.wearedevelopers.com/videos/661-why-kotlin-is-the-better-java-and-how-you-can-start-using-it) ## Related Articles - [How to Become an AI Engineer](https://www.wearedevelopers.com/magazine/331-how-to-become-an-ai-engineer) - [What is Agentic Programming and Why Should Developers Care?](https://www.wearedevelopers.com/magazine/625-what-is-agentic-programming-and-why-should-developers-care) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [From Prototype to Production: Build AI Agents with This Free 4-Course Learning Path](https://www.wearedevelopers.com/magazine/655-from-prototype-to-production-build-ai-agents-with-this-free-4-course-learning-path) - [Graph and AI Trends 2026: Why Is AI Running but Not Yet Delivering?](https://www.wearedevelopers.com/magazine/680-graph-and-ai-trends-2026-why-is-ai-running-but-not-yet-delivering) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift)