Founding Software Engineer

At The Flex, we believe renting a home should be as effortless as booking a ride.
Our mission is ambitious: enable anyone to live anywhere, anytime, without friction.
Powered by Base360.ai, our proprietary technology platform, we are building the operating system for modern renting—automating operations, connecting fragmented systems, and creating seamless experiences for guests, landlords, and operators across the world.
We're looking for a Founding Software Engineer to help architect and build the technology that powers the future of The Flex.
This is not a typical engineering role.
You'll work directly with the founder, influence product strategy, make architectural decisions, and build systems that become the foundation of a global business.
You'll have extraordinary ownership, responsibility, and impact from day one.

What You'll Build
As a Founding Software Engineer, you'll help create and scale Base360.ai—the technology platform that powers every aspect of The Flex.
From AI-powered workflows and booking systems to operational automation and intelligent decision-making, you'll build products that directly impact revenue, efficiency, and customer experience.
You won't just ship features.
You'll create systems that replace manual work, unlock scale, and become a competitive advantage for the company.

Your Mission
Build Core Products
Design, build, and launch the software that powers bookings, pricing, payments, operations, communications, and guest experiences.
Architect the Platform
Make key technical decisions and help define the long-term architecture of Base360.ai.
Create Automation at Scale
Develop workflows and systems that automate operational processes across multiple countries and thousands of stays.
Leverage AI
Build AI-powered tools, agents, and workflows that improve productivity, decision-making, and customer experience.
Integrate the Ecosystem
Develop and maintain integrations with platforms including Airbnb, Hostaway, Stripe, Twilio, Google, OpenAI, and other strategic partners.
Move Fast
Operate with urgency and ownership, turning ideas into production-ready solutions quickly and effectively.
Solve Real Problems
Work on challenges such as:
Reservation synchronization

Dynamic pricing

Smart access management

Guest communication automation

Operational forecasting

Maintenance and cleaning automation

AI-powered alerts and monitoring

Revenue optimization

Help Build the Company
As one of the first engineers, your influence will extend beyond code. You'll help shape processes, culture, product direction, and the future engineering team.

Tech Stack
Our current stack includes:
Python

FastAPI

React

TypeScript

Supabase

PostgreSQL

AWS

OpenAI APIs

Stripe

Twilio

Docker

GitHub Actions

We care more about your ability to learn and build than your experience with any specific technology.

What We're Looking For
Must Have
Strong software engineering fundamentals

Experience building production-grade applications

Strong understanding of APIs, databases, and system design

Product mindset and customer obsession

Ability to work independently with minimal supervision

Strong problem-solving ability

High level of ownership and accountability

Bonus Points
Startup experience

Experience with AI products or LLM integrations

Experience building SaaS products

Experience with FastAPI, React, AWS, or Supabase

Marketplace, travel, or PropTech experience

What Success Looks Like
Within your first year:
Critical company operations are automated through systems you've built

Base360.ai becomes a core competitive advantage

New products are shipped rapidly and reliably

Engineering velocity increases significantly

AI-powered workflows are embedded across the business

The platform is ready to scale internationally

Why Join The Flex
Massive Impact
Your work will directly shape how thousands of people live, travel, and experience cities.
Founding-Level Ownership
You'll have significant influence over product, technology, and company direction.
Build Alongside the Founder
Work closely with leadership and help define the future of the business.
Learn Faster
Gain exposure to engineering, AI, product, operations, growth, and company-building.
Performance-Based Rewards
Competitive compensation with meaningful upside for exceptional contributors.
Remote-First
Work from anywhere. We care about results, not hours.

This Role Is Not For You If
You're looking for a predictable corporate environment

You prefer maintaining systems rather than building them

You need constant direction and supervision

You avoid ownership outside your immediate responsibilities

You are uncomfortable with change, ambiguity, and rapid execution

If you're excited by building products, solving hard problems, leveraging AI, and helping create the operating system for modern renting, we'd love to hear from you.
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