Software Engineer at The Flex | Paris | Rezi

Software Engineer at The Flex

Software Engineer

The Flex · Paris

1 months ago

Software Engineer

The Flex · Paris

2 months ago
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About the Role

We are looking for a highly ambitious engineer to build systems that create leverage at scale. You will build, ship, automate, and solve real-world problems that directly impact thousands of guests and properties. If you're excited by APIs, automation, AI agents, cloud infrastructure, and building products from the ground up, we want to meet you.

Responsibilities

  • Design and develop scalable applications, services, and APIs that power bookings, pricing, payments, guest experiences, and operations.
  • Build event-driven workflows that automate tasks previously performed by humans.
  • Leverage LLMs, AI agents, and machine intelligence to streamline operations, improve decision-making, and enhance customer experiences.
  • Create robust APIs that enable seamless communication between internal systems, third-party providers, and future products.
  • Build and maintain integrations with platforms including Airbnb, Hostaway, Stripe, Twilio, OpenAI, Google, and other strategic partners.
  • Deploy and manage cloud-native infrastructure designed for reliability, performance, and global growth.
  • Build solutions for real-time reservation synchronization, dynamic pricing intelligence, smart key management, automated guest communication, operational forecasting, cleaning and maintenance automation, and AI-powered monitoring and alerts.
  • Own projects end-to-end—from idea to deployment—and continuously improve the systems you build.

Requirements

  • Strong experience building production-grade software systems
  • Experience with FastAPI, Python, React, or similar frameworks
  • Strong understanding of APIs, distributed systems, and cloud architecture
  • Experience designing scalable backend systems
  • Ability to work independently with minimal supervision
  • Strong problem-solving ability and product mindset
  • Curiosity about AI, automation, and operational efficiency
  • A bias toward action and shipping
  • Experience with Property technology (PropTech)
  • Experience with Marketplace businesses
  • Experience with AI agents and workflow automation
  • Experience with Event-driven architectures
  • Experience with Supabase
  • Experience with AWS serverless infrastructure

Skills

  • Python
  • FastAPI
  • React
  • TypeScript
  • Supabase
  • PostgreSQL
  • AWS
  • Serverless Architecture
  • OpenAI APIs
  • Twilio
  • Stripe
  • Docker
  • GitHub Actions
  • APIs
  • Automation
  • AI agents
  • Cloud infrastructure
  • Distributed systems
  • Cloud architecture
  • Backend systems
  • AI
  • Operational efficiency

Location

  • Remote

Work Type

  • Remote-First
  • Full-time

Experience Level

  • Founding Software Engineer

Benefits

  • Competitive compensation with substantial upside for exceptional performers
  • Work from anywhere. We care about outcomes, not hours.

About the Company

  • At The Flex, we believe renting a home should feel as effortless as booking a ride.
  • Our mission is ambitious: enable anyone to live anywhere, anytime, without friction.
  • Powered by Base360.ai, our proprietary automation platform, we are building the operating system for modern renting—connecting property data, orchestrating operations, automating workflows, and enabling seamless stays across continents.