Full-Stack Product Engineer
The Flex
| Company | The Flex |
| Category | Engineering |
| Location | Paris |
| Remote | Remote |
| Employment | Not stated |
| Level | Not stated |
| Salary | Not stated by the employer |
| Posted | 17 Jul 2026 |
| Last verified | 12 Aug 2026 |
| Source | The employer's own careers page (company_site) |
Description
What you will do
Full-Stack Product Engineer
At The Flex, we believe renting a home should be as simple as booking a ride.
Our mission is to 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 systems, and creating seamless experiences for guests, landlords, and operators worldwide.
We're looking for a Full-Stack Product Engineer who thrives at the intersection of product, engineering, and execution.
This isn't a role where you'll simply implement tickets.
You'll identify problems, design solutions, build products, automate workflows, and help shape the future of the platform.
What You'll Do
•
Build Products End-to-End
Take ideas from concept to production by designing, building, testing, and launching features that create measurable business impact.
•
Own Customer Problems
Work directly with founders and operational teams to understand challenges and transform them into elegant software solutions.
•
Move Fast
Ship quickly, gather feedback, iterate, and continuously improve products based on real-world usage.
•
Create Automation
Design systems that eliminate manual work and allow the company to scale efficiently.
•
Build Internal Tools
Develop operational dashboards, workflow engines, management platforms, and AI-powered tools used across the business.
•
Connect External Systems
Build integrations with platforms such as Airbnb, Stripe, Hostaway, Twilio, Google, and OpenAI.
•
Leverage AI
Implement AI-powered features and workflows that improve productivity, decision-making, and customer experience.
•
Scale the Platform
Ensure systems remain reliable, secure, and scalable as the business grows internationally.
Tech Stack
Current technologies include:
• Python
• FastAPI
• React
• TypeScript
• Supabase
• PostgreSQL
• AWS
• OpenAI APIs
• Stripe
• Twilio
• GitHub Actions
You don't need experience with every technology listed above, but you should be capable of learning quickly and adapting.
What Success Looks Like
Within your first year:
• You've launched multiple high-impact features
• Manual operational processes have been automated
• Product development cycles are significantly faster
• AI-powered workflows have been deployed across the business
• Base360.ai has become a stronger competitive advantage for The Flex
If you love building products, solving real-world problems, and creating systems that scale, we'd love to hear from you.
LI-Remote
What we offer
Why Join The Flex
•
Massive Ownership
You'll have direct influence over product decisions, architecture, and company strategy.
•
Build Real Products
Your work will impact thousands of users and properties across multiple countries.
•
Learn at Startup Speed
You'll work closely with founders and gain exposure to engineering, product, operations, AI, and business.
•
Remote-First
Work from anywhere.
•
High Growth Environment
We're building quickly and looking for people who want to grow alongside the company.
Requirements
What We're Looking For
Must-Have
• Strong full-stack development experience
• Experience building production-grade web applications
• Strong understanding of APIs and databases
• Product mindset and user-centric thinking
• Ability to work independently and take ownership
• Strong problem-solving skills
• Excellent written communication
Nice-to-Have
• Experience with FastAPI
• Experience with React and TypeScript
• Experience with AI tools or LLM integrations
• Startup experience
• PropTech, marketplace, or SaaS experience
This Role Is Not For You If
• You prefer highly structured corporate environments
• You only want to write code from predefined specifications
• You avoid ownership outside your immediate responsibilities
• You are uncomfortable moving quickly and adapting to change