Europe Arbeitnow ·
full-timeSenior Full-stack Product Engineer
The Flex · Paris
Base360.ai, the AI operating system created by The Flex, provides a unified platform for short‑term rental operators to automate reservations, guest communication, pricing, payments, cleaning, maintenance and reporting. As a Senior Full‑Stack Product Engineer you will work directly with founders, designers and property‑manager users to translate real operational pain points into reliable software. The day‑to‑day work includes designing and implementing customer‑facing features, operational dashboards and event‑driven automation engines, as well as building AI‑powered workflows that use large language models for tasks such as guest messaging and pricing assistance. You will also develop and maintain integrations with external services like Airbnb, Hostaway, Stripe, Twilio and OpenAI, and ensure the platform scales securely on AWS serverless infrastructure. The role demands end‑to‑end ownership from prototype through testing, deployment and production monitoring. Ideal candidates have several years of production experience across frontend (React, TypeScript) and backend (Python, FastAPI), strong API and database design skills, familiarity with cloud services, and a keen interest in automation and AI applied to the short‑term rental domain.
About Us 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 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 an ambitious Senior Full-Stack Product Engineer who wants to turn real customer problems into intuitive, reliable software. You'll work closely with founders, designers, and operators to identify what matters, build solutions, and improve them based on how people use them. If you enjoy owning the full journey from customer problem to shipped product—and you're excited by AI, automation, and short-term rentals—we want to meet you. What You'll Build As a Senior Full-Stack Product Engineer, you'll help shape and scale Base360.ai across the entire short-term rental lifecycle. You'll build customer-facing features, operational dashboards, automation engines, AI-powered workflows, and integrations that help property managers grow without increasing their workload at the same rate. Your work will connect what users see with the systems behind it—from a guest’s check-in experience to the workflows coordinating reservations, cleaning, payments, and owner reporting. Your Mission Understand Customer Problems Work directly with property managers and internal teams to understand their workflows, identify friction, and decide which problems are worth solving. Build Products End-to-End Take features from idea and prototype through frontend, backend, integrations, testing, and deployment. Own the complete experience and how it performs in production. Create Intuitive User Experiences Work with designers to make complex short-term rental operations easy to manage. Build interfaces that help users complete tasks quickly and confidently. 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 Features Use LLMs and AI agents to automate guest communication, triage maintenance requests, support pricing decisions, and help operators manage their portfolios more efficiently. Connect the Ecosystem Build reliable APIs and integrations with platforms including Airbnb, Hostaway, Stripe, Twilio, OpenAI, Google, and other partners across the short-term rental ecosystem. Solve Real 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 Guest check-in and upsell journeys Operational forecasting Cleaning and maintenance automation Owner reporting and financial workflows AI-powered monitoring and alerts Measure and Improve Use customer feedback, product usage, and operational results to evaluate what you ship. Improve features based on adoption, time saved, fewer errors, and better user outcomes. Build for Scale Make sound technical decisions that balance delivery speed, maintainability, security, and reliability as more operators and properties join the platform. 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 shipping production software The ability to work across frontend and backend systems Experience with React, TypeScript, Python, FastAPI, or similar technologies Strong understanding of APIs, databases, integrations, and cloud architecture A product mindset and curiosity about why users need a feature Good judgment around usability, scope, and technical trade-offs The ability to turn an ambiguous problem into a practical, working solution Confidence working directly with customers, designers, and founders The ability to work independently and own outcomes Curiosity about AI, automation, and operational efficiency A bias toward shipping, learning, and iterating 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 Product analytics and experimentation Event-driven architectures Supabase AWS serverless infrastructure What Success Looks Like Within your first 12 months: You've shipped features that property managers actively use Core short-term rental workflows are automated through products you've built Customers spend less time on manual
| Role | Senior Full-stack Product Engineer |
|---|---|
| Company | The Flex |
| Location | Paris |
| Type | full-time |
| Compensation | Not disclosed |
| Deadline | Rolling |
Typical process for this type of role
A general guide — the exact steps for this specific listing may vary; check the original posting for details.
- 1ApplicationSubmit your resume through the apply link.
- 2ScreeningRecruiter reviews your background against the role.
- 3AssessmentA technical test, assignment, or coding round, depending on the role.
- 4Interview(s)One or more rounds with the hiring team.
- 5OfferOffer letter with compensation and start date.
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