SeQura

Senior Backend Engineer – AI Agents

SeQura
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8 months ago
Barcelona, SpainSenior

Responsibilities

  • Build robust, scalable backend systems for Smart Agent workflows and shopper interactions.
  • Orchestrate agent workflows across services while managing context, state, and interactions.
  • Integrate AI agent capabilities safely with payments, shopper accounts, risk, and merchant services.
  • Use RAG frameworks and structured data to support intelligent responses without fine-tuning models.
  • Transform product ideas and shopper needs into reliable backend services and contribute to architectural decisions.
  • Monitor, optimize, and improve production systems for high performance, availability, and reliability.
  • Collaborate with Product, Frontend, Data, AI, and Engineering teams to drive alignment and shared ownership.

Requirements

  • At least 5 years of experience as a Backend Engineer.
  • Experience building production-grade backend systems, preferably with Ruby on Rails; Python, Kotlin, Java, Elixir, or JavaScript experience is also valued.
  • Strong knowledge of object-oriented programming, clean coding, test-driven development, and agile principles.
  • Experience with agentic systems or LLM-powered agents, including RAG, workflow orchestration, or chatbots.
  • Ability to build backend systems supporting AI agents without requiring data science skills.
  • English proficiency; Spanish is desirable.
  • Experience scaling backend services for high concurrency and low latency is a plus.
  • Candidates should demonstrate strategic and platform-oriented thinking, stakeholder management, autonomy, ownership, and a pragmatic mindset.
  • Located in Barcelona or willing to relocate is preferred.

Benefits

  • Flexible working hours with hybrid or remote options.
  • Barcelona office environment with workshops and meet-ups.
  • 23 vacation days plus 2 additional free-disposal days per year.
  • Flexible compensation plan for transportation, restaurants, and kindergarten through Cobee.
  • Health insurance discounts with Sanitas and DKV.
  • Personal budget for professional development.
  • Supportive, inclusive, and collaborative workplace culture.
  • Holistic Wellness Program with 34 activities covering occupational, physical, financial, emotional, social, and environmental wellbeing.

Tech Stack

ElixirJavaJavaScriptKotlinPythonRuby on Rails
SeQura

About SeQura

201-500 employees

SeQura builds payment and consumer-financing tools for online and in-store merchants, including Buy Now, Pay Later, interest‑free installments up to 24 months, and shopper accounts. Merchants integrate its platform to increase conversion and manage risk; revenue comes from merchant service fees and financing charges. Founded in 2014 and headquartered in Barcelona, it is privately held and expanding across Southern Europe and Latin America.

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