---
title: 'Senior Software Engineer at The Flex'
canonical: 'https://feeny.ai/job/senior-software-engineer-the-flex-paris-cbaknhrc248r'
type: 'job'
last_seen: '2026-09-23'
---

# Senior Software Engineer at The Flex

- **Company:** The Flex
- **Location:** Paris, France
- **Employment:** full-time
- **Work type:** remote
- **Posted:** 2026-09-23
- **Last confirmed live:** 2026-09-23
- **Apply:** https://jobs.ashbyhq.com/the-flex/d9457005-2ae9-410f-8fe7-164ff0ad1840

## Job description

## About Us

[Base360.ai](http://Base360.ai) is the AI operating system for short-term rental businesses, helping property managers run their operations on autopilot. Born out of The Flex, a short-term rental operator that scaled to an eight-figure business using its own software, [Base360.ai](http://Base360.ai) is now launching as a standalone platform for short-term rental operators worldwide. We bring reservations, guest communication, pricing, payments, cleaning, maintenance, and reporting into one platform—helping operators automate manual work, reduce costs, increase revenue, and scale their portfolios. We're looking for a highly ambitious Senior Software Engineer who wants to build systems that solve real problems at scale. You'll build, ship, automate, and deliver products that directly impact property managers, their teams, and their guests. 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 Senior Software Engineer, you'll help architect and scale [Base360.ai](http://Base360.ai)—the platform powering every aspect of a short-term rental business. You'll build customer-facing products, automation engines, AI-powered workflows, integrations, and operational systems that help property managers grow without increasing their workload at the same rate. Your work will span the entire short-term rental lifecycle: from listing distribution, pricing, and bookings to guest stays, property operations, and financial reporting.

## Your Mission

Build the Core Platform Design and develop scalable applications, services, and APIs that power reservations, availability, pricing, payments, guest experiences, and property operations. Create Powerful Automations Build event-driven workflows that eliminate repetitive work—from scheduling cleaning after a booking to sending check-in instructions and generating owner statements. Develop AI-Powered Systems Use LLMs and AI agents to automate guest communication, triage maintenance requests, support pricing decisions, and help operators manage their portfolios more efficiently. Design API-First Architecture Create robust APIs that connect internal services, booking channels, third-party providers, and customer systems. Integrate the Ecosystem Build and maintain integrations with platforms including Airbnb, Hostaway, Stripe, Twilio, OpenAI, Google, and other strategic partners across the short-term rental ecosystem. Scale Infrastructure Deploy and manage cloud-native infrastructure designed for reliability, performance, and global growth across multiple property management businesses. Solve Complex Operational Problems Build solutions for:

- Real-time reservation and availability synchronization
- Dynamic pricing intelligence
- Smart lock access and key management
- Automated guest communication across channels
- Operational forecasting
- Cleaning and maintenance automation
- Owner reporting and financial workflows
- AI-powered monitoring and alerts

Move Fast and Own Delivery Own projects end-to-end—from understanding an operator’s problem to architecture, implementation, deployment, and ongoing improvement. Bring senior engineering judgment to technical decisions, code reviews, and the reliability of 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 and owning 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 and reliable data models
- The ability to work independently and make sound technical decisions
- Strong problem-solving skills and a product mindset
- Curiosity about AI, automation, and operational efficiency
- A bias toward action, shipping, and learning from real users
- The ability to balance delivery speed with maintainability and reliability

Bonus points for experience with:

- Short-term rentals, hospitality technology, or property management systems
- Multi-tenant SaaS platforms
- Marketplace businesses and booking channel integrations
- AI agents and workflow automation
- Event-driven architectures
- Supabase
- AWS serverless infrastructure

What Success Looks Like Within your first 12 months:

- Core short-term rental workflows are automated through systems you've built
- Property managers spend less time on manual administration
- Reservations, availability, payments, and operational data move reliably between systems
- New integrations are deployed and maintained reliably
- AI-powered workflows become part of customers’ everyday operations
- The platform supports more operators and properties while maintaining reliability and performance
- [Base360.ai](http://Base360.ai) helps customers grow their portfolios, improve guest experiences, and operate more profitably

## Why Join Us

Build Something Meaningful Solve problems experienced daily by short-term rental operators, with direct access to The Flex’s operations to test ideas and see their impact. Extreme Ownership Have the freedom and responsibility to make technical decisions and deliver systems that matter. Small Team, Massive Opportunity Work closely with the founders and directly influence the product and technical direction of [Base360.ai](http://Base360.ai). Learn Faster Solve real-world challenges across software, AI, automation, hospitality 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 a narrowly defined role with limited product involvement
- You need detailed instructions for every task
- You avoid ownership and accountability
- You're comfortable shipping work without taking responsibility for its quality

We're looking for someone who wants to help build the AI operating system for the short-term rental industry. #LI-Remote

## About The Flex

## Company Overview
- **One-liner**: The Flex is a flexible accommodation platform offering hotel-grade, fully furnished rentals for tenants, landlords, and businesses, operating across the UK, France, Algeria, and expanding into new cities.
- **Entity Type**: Private (bootstrapped/early-stage growth company)
- **Headquarters**: London, United Kingdom (with offices in San Francisco, Dubai, Algiers, and Casablanca)
- **Founded**: 2019
- **Founders**: Raouf Yousfi (Co-Founder & CEO) and Michael Buggy (Co-Founder & COO)

## Core Business
- **Primary industry**: Real Estate / Flexible Living / Property Management
- **Target customers**: B2B (150+ corporate partners for employee relocation, staffing, insurance claims), B2C (tenants seeking flexible leases), and B2B (landlords seeking guaranteed rent with zero voids)
- **Mission statement**: To eliminate the constraints of traditional rental models, reimagining the idea of 'home' from something fixed to something flexible—unlocking freedom for renters, efficiency for landlords, and growth for entire cities.

## Products & Services
- **Flexible Rentals (Tenants)**: Fully furnished, hotel-grade homes with digital key access, utilities, Wi-Fi, optional housekeeping, and 24/7 live support. Leases as short as a week or as long as needed, with month-to-month terms, easy extensions, and exits.
- **Guaranteed Rent (Landlords)**: Fixed monthly payments with zero voids from day one; The Flex handles upgrades, dynamic pricing, resident vetting, cleaning, and maintenance.
- **Corporate Housing (B2B)**: One master lease unlocks an entire portfolio across cities; dedicated account manager; ideal for employee relocation, project teams, and insurance claims.

## Market Standing
- **Valuation**: Not publicly available
- **Key Metric**: 47 employees (as of mid-2025) with monthly headcount growth of +4.9%; 500+ active job postings; 84,000+ LinkedIn followers; over 150 corporate partners; properties in multiple cities across the UK, France, Algeria, and recently launched in Lisbon.
- **Notable Investors/Partners**: 150+ corporate clients; no external funding rounds publicly disclosed (appears bootstrapped or early-stage without major VC backing).
- **Growth Signals**: Rapid headcount growth (+4.9% monthly), recent expansion into Lisbon (July 2025), 500+ open roles, and a goal of reaching properties in every major city worldwide by 2027.

## Competitive Advantages
- **Flexibility at scale**: Month-to-month leases, same-day move-ins, cross-border relocation with a few taps—unlike traditional long-term leases.
- **Full-stack property management**: Landlords get guaranteed rent and zero voids, while tenants get hotel-grade service (cleaning, maintenance, 24/7 support).
- **Data-driven operations**: Evidence-based decision-making, dynamic pricing, and rapid evaluations for landlords.
- **Flat, ego-free culture**: No hierarchy or bureaucracy; best idea wins based on data, not tenure.

## Strategic Focus
- **Global expansion**: Actively entering new cities (Lisbon launched July 2025) with a target of having homes in every major city worldwide.
- **Scaling the platform**: Growing the portfolio of properties and corporate partnerships; hiring aggressively (500+ open roles) to support expansion.
- **Product innovation**: Building a seamless, Amazon-like rental experience with instant approvals, digital keys, and flexible terms.

## Why Work Here
- **Culture**: Ego-free, fast-paced, values-driven environment with no hierarchy or bureaucracy. Emphasis on big ideas, learning from failure, and shipping fast.
- **Remote-first**: The Flex is a remote-first company, hiring stellar talent globally and trusting them to own outcomes.
- **Mentorship & growth**: Work alongside senior leaders (including founders) who provide direct feedback, hands-on coaching, and clear career progression. Promotions based on performance, not tenure.
- **Accountability**: Each teammate owns clear metrics and turns objectives into outcomes.
- **Innovation**: Data-backed approach; open-minded, diverse team driving solutions.
- **Notable perks**: Minimal rules, total accountability, genuine freedom; "Career Rocket Ship" where you own mission-critical projects from day one.
- **Application process**: Online assessment, HR interview, and founder interview for every role.

## Sources
1. [theflex.global – About Us](https://theflex.global/about-us)
2. [theflex.global – Careers](https://theflex.global/careers)
3. [theflex.global – Homepage](https://theflex.global/)
4. [LinkedIn – The Flex](https://uk.linkedin.com/company/theflexglobal)
5. [Ashby – The Flex Jobs](https://jobs.ashbyhq.com/The-Flex)

## Other roles at The Flex

- [Founding Growth Marketer](https://feeny.ai/job/founding-growth-marketer-the-flex-london-9t54zdw5wan7) — London, United Kingdom
- [Senior Full-Stack Product Engineer](https://feeny.ai/job/senior-full-stack-product-engineer-the-flex-paris-t0n85e5vnnj9) — Paris, France
- [Product Engineer](https://feeny.ai/job/product-engineer-the-flex-paris-nnk2hxarck36) — Paris, France
- [Founder in Residence](https://feeny.ai/job/founder-in-residence-the-flex-london-ydzxa7mb8n7b) — London, United Kingdom
- [French-Speaking Customer Experience Specialist](https://feeny.ai/job/french-speaking-customer-experience-specialist-the-flex-paris-h80exm7q0ywm) — Paris, France
- [Senior Software Engineer](https://feeny.ai/job/senior-software-engineer-uipath-bangalore-xdk3edkm5jnt) — Bangalore, India
- [Senior Software Engineer](https://feeny.ai/job/senior-software-engineer-lorikeet-new-york-3kk8w2pnk1ka) — New York, NY
- [Senior Software Engineer](https://feeny.ai/job/senior-software-engineer-lorikeet-sydney-7yycbh6t6bfw) — Sydney, Australia
- [Senior Software Engineer](https://feeny.ai/job/senior-software-engineer-tanium-addison-6bc2h8cz03b4) — Addison, TX / Bellevue, WA / Durham, NC / Emeryville, CA
- [Senior Software Engineer](https://feeny.ai/job/senior-software-engineer-runa-runa-london-01jpbv3y4sw0) — Runa London