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Senior Software Engineer - Backend

Aircall· Engineering
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Hybrid (Madrid)Permanent Full Time EmployeePosted 6mo ago

About the role

Senior Python Engineer role focused on building the AI-powered autonomous sales orchestration layer, designing scalable distributed backend systems, and delivering production-grade Python services in a hybrid Madrid-based office.

Responsibilities

  • Design and implement production-grade Python services with clean architecture and strong engineering discipline.
  • Architect scalable, distributed systems using Domain-Driven Design (DDD) principles.
  • Integrate with external SaaS systems (CRMs, dialers, meeting tools, OAuth providers).
  • Optimize performance, latency, cost, and reliability of AI-driven systems.
  • Build and orchestrate LLM-powered agents (planning, reasoning, tool usage, memory).
  • Develop internal frameworks to manage: Agent coordination, Tool execution, Memory layers, Event-driven workflows.
  • Work closely with AI engineers, product, and founders to transform complex sales workflows into autonomous processes.
  • Use AI coding assistants effectively and experiment with AI-augmented development workflows.

Qualifications

  • 7+ years of strong backend engineering experience.
  • Advanced Python expertise (async, typing, architecture patterns, testing).
  • Experience designing scalable distributed systems.
  • Design thoughtful, well-architected systems and write clean, high-quality code, with a focus on performance and long-term maintainability.
  • Experience with GCP (preferred) or AWS.
  • Mindset: building systems that can reason and take action—not just generate responses.
  • Leverage AI coding assistants and push AI-augmented engineering boundaries.
  • thrive in fast-paced startup environments with real ownership and immediate impact.
  • Strong communication skills with Product, Design, and Business stakeholders; English fluency required; Spanish a plus.

Skills

Required:Backend engineeringPythonDistributed systems designGCP/AWS

Benefits

  • Competitive salary package & benefits
  • 43+ Nationalities and inclusive culture
  • Growth opportunities in a fast-growing company
  • Work-life balance emphasis
Last updated Jul 1, 2026. Interested? Apply on the company site.
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About Aircall

AI-powered customer conversations made easy

Aircall is more than a business phone—it’s an integrated customer communications and intelligence platform. Achieve more with AI Agents, data-driven insights, and automation.

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