Barcelona, Spain Hybrid Full-time

SeQura is hiring a Senior Backend Engineer – AI Agents

Responsibilities

  • 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.
  • 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.

Requirements

  • 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.

Benefits

  • Secure, reliable, and supportive workplace with freedom to contribute your best.
  • Fellowship and supportive culture fostering a sense of belonging.
  • Challenging projects to grow your skills and knowledge.
  • Unique, inspiring office environment in Barcelona.
  • 23 vacation days + 2 free disposal days/year.
  • Flexible compensation plan for transportation, restaurants, and kindergarten with Cobee.
  • Health insurance discounts with Sanitas and DKV.
  • Flexible working hours and hybrid or remote options.
  • Personal budget for professional development.
  • Office workshops and meet-ups for community participation and career growth.
  • Holistic Wellness Program covering occupational, physical, financial, emotional, social, and environmental consciousness, with 34 activities to choose from.

Work Arrangement

Hybrid — Barcelona

Additional Information

  • English proficiency required.
  • Spanish nice to have.
  • Flexible working hours.
  • Hybrid or remote options available.
  • Relocation to Barcelona is a plus but not required.
Required Skills
Object Oriented ProgrammingTDD
About company
SeQura
seQura provides innovative, flexible and easy-to-use payment technologies that help merchants acquire, convert and retain more customers. We make a difference in sales performance by tailoring our solutions to different sectors, to address their unique pain points and deliver superior results in Retail, Education, Eyewear, Repairs and Travel. We also empower smart shopping to consumers who seek more value, convenience, and flexibility in their shopping, with new payment experiences that allow them to save, access interest-free credit, or pay in small, comfortable installments of up to 24 months. Born in Barcelona, seQura is a privately-owned fintech, currently expanding throughout southern Europe and Latin America, growing above 50% CAGR. Over 6000 businesses, almost 3 million shoppers, and almost 400 employees continue to rate us as one of the most loved and trusted fintechs out there, with an NPS of 87%, a Trustpilot rating of 4.7/5, and a Glassdoor rating of 4.1/5.
All jobs at SeQura Visit website
Job Details
Department Tech
Category backend
Posted 6 months ago