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Software Engineer

The Flex

Full-stack Development Full-time
Remote (Global) June 15, 2026

Job description

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.

We're looking for a highly ambitious engineer who wants to build systems that create leverage at scale. This isn't a role where you'll spend months debating specifications. You'll 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.

What You'll Build

As a Founding Software Engineer, you'll help architect and scale Base360.ai—the technology platform powering every aspect of The Flex.

You'll build internal products, automation engines, AI-powered workflows, integrations, and operational systems that eliminate manual work and allow the business to scale globally.

Your work will touch everything from guest journeys and property operations to pricing intelligence and AI-driven decision-making.

Your Mission

Build the Core Platform

Design and develop scalable applications, services, and APIs that power bookings, pricing, payments, guest experiences, and operations.

Create Powerful Automations

Build event-driven workflows that automate tasks previously performed by humans.

Develop AI-Powered Systems

Leverage LLMs, AI agents, and machine intelligence to streamline operations, improve decision-making, and enhance customer experiences.

Design API-First Architecture

Create robust APIs that enable seamless communication between internal systems, third-party providers, and future products.

Integrate the Ecosystem

Build and maintain integrations with platforms including Airbnb, Hostaway, Stripe, Twilio, OpenAI, Google, and other strategic partners.

Scale Infrastructure

Deploy and manage cloud-native infrastructure designed for reliability, performance, and global growth.

Solve Complex Operational Problems

Build solutions for:

  • Real-time reservation synchronization
  • Dynamic pricing intelligence
  • Smart key management
  • Automated guest communication
  • Operational forecasting
  • Cleaning and maintenance automation
  • AI-powered monitoring and alerts

Move Fast

Own projects end-to-end—from idea to deployment—and continuously improve the systems you build.

Tech Stack

We care more about capability than specific technologies, but our current stack includes:

  • Python
  • FastAPI
  • React
  • TypeScript
  • Supabase
  • PostgreSQL
  • AWS
  • Serverless Architecture
  • OpenAI APIs
  • Twilio
  • Stripe
  • Docker
  • GitHub Actions

You Might Be a Great Fit If You Have

  • 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

Bonus points for experience with:

  • Property technology (PropTech)
  • Marketplace businesses
  • AI agents and workflow automation
  • Event-driven architectures
  • Supabase
  • AWS serverless infrastructure

What Success Looks Like

Within your first 12 months:

  • Core operational processes are automated through systems you've built
  • Manual work across the business is significantly reduced
  • New integrations are deployed and maintained reliably
  • AI-powered workflows become part of everyday operations
  • Base360.ai becomes a competitive advantage that enables rapid global scaling

Why Join The Flex

Build Something Meaningful

Your work will directly impact how people live, travel, and experience cities around the world.

Extreme Ownership

You'll have the freedom to make decisions and build systems that matter.

Small Team, Massive Opportunity

Work closely with founders and have a direct influence on product and technical direction.

Learn Faster

You'll solve real-world challenges across software, AI, automation, operations, and scale.

Performance-Based Rewards

Competitive compensation with substantial upside for exceptional performers.

Remote-First

Work from anywhere. We care about outcomes, not hours.

This Role Is Not For You If

  • You're looking for a slow-paced corporate environment
  • You prefer maintaining systems rather than building them
  • You need detailed instructions for every task
  • You avoid ownership and accountability
  • "Good enough" is your standard

We're not looking for someone to fill a position.

We're looking for someone to help build the future operating system of modern renting.

#LI-Remote

Available regions

Each region below is open to applicants in that country only. Apply through the link for your region.

Country
States / regions
Apply
France
Any
Italy
Any
United Kingdom
Any
Algeria
Any
Tunisia
Any
Indonesia
Any
Egypt
Any
San Marino
Any
Mauritius
Any
Norway
Any
Albania
Any
Portugal
Any
Kazakhstan
Any
Serbia
Any
Montenegro
Any
Brunei
Any
Vietnam
Any
Morocco
Any
Oman
Any
Hong Kong
Any
Hungary
Any
Slovenia
Any
Poland
Any
Taiwan
Any
Latvia
Any
Philippines
Any
Ireland
Any
Austria
Any
Ivory Coast
Any
China
Any
Bulgaria
Any
Thailand
Any
Finland
Any
Congo
Any
Peru
Any
Greece
Any
Ethiopia
Any
Armenia
Any
Iceland
Any
Denmark
Any
Malta
Any
Moldova
Any
Malaysia
Any
Belgium
Any
Lithuania
Any
Cameroon
Any
Madagascar
Any
Luxembourg
Any
Cyprus
Any
Turkey
Any
Georgia
Any
Slovakia
Any
Mongolia
Any
Germany
Any
South Korea
Any
Switzerland
Any
Romania
Any
Kuwait
Any
Estonia
Any
Netherlands
Any
Kosovo
Any
Jordan
Any
Andorra
Any
South Africa
Any
Japan
Any
Spain
Any
Qatar
Any
Benin
Any
Croatia
Any
Ukraine
Any
Singapore
Any
Azerbaijan
Any
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