Backend Developer – The Flex (Belfast, Northern Ireland)
Rebuild the backbone of modern renting.
At The Flex, we believe renting a home should be instant, intelligent, and seamless — as easy as tapping a button.
Our ambition is bold: create a world where anyone can live anywhere without friction.
Powered by Base360.ai, our automation and intelligence platform, we’re building the operating system for global stays — syncing property data, orchestrating operations, and powering the infrastructure behind every effortless guest experience.
We’re hiring a Backend Engineer who loves building automation, scaling systems, and solving real-world problems with clean, resilient software.
What You’ll Build
As a Backend Engineer, you’ll architect the foundations of The Flex: the systems, APIs, and automation layers that coordinate global inventory, sync bookings in real time, and enable properties to operate autonomously.
Your Mission
* Build the Core – Design and scale robust APIs and backend services that manage bookings, payments, availability, and property intelligence.
* Automate the Workflows – Develop serverless functions and microservices that eliminate repetitive tasks and streamline operations across cities and continents.
* Connect the Ecosystem – Implement integrations between Base360.ai and major platforms such as Airbnb, Stripe, Twilio, and Hostaway.
* Engineer for Scale – Architect event-driven systems and data pipelines capable of handling millions of events and transactions reliably.
* Power Intelligence – Work with AI and data teams to embed smart automation and predictive logic into operational flows.
* Collaborate Closely – Partner with product, front-end, and operations teams to translate messy real-world challenges into simple, scalable backend solutions.
You’ll Excel in This Role If You Have
* Expertise with Node.js, Python/FastAPI, and AWS serverless.
* Strong experience building and scaling API-first products.
* A deep understanding of databases, synchronization logic, and distributed systems.
* A passion for automation, intelligent operations, and emerging PropTech.
* A systems-level mindset — you think in terms of resilience, reliability, and flow.
* A strong bias toward execution and ownership.
Why You’ll Love Working Here
* Meaningful Impact — Your systems will become the automation engine of thousands of stays across multiple countries.
* High Ownership — Small team, no bureaucracy, and the opportunity to influence core architectural decisions.
* Speed & Autonomy — Move fast, ship often, and help define the future of our technical ecosystem.
* Performance-Based Rewards — Competitive salary + meaningful equity opportunities for top performers.
* Fully Remote — Work from anywhere. What matters is excellence, not timesheets.
This Role Is Not for You If
* You want slow, predictable routines.
* You prefer planning meetings over shipping code.
* You’re content writing average software.
* You’re not committed to becoming world-class in your craft.
Seniority level
* Mid-Senior level
Employment type
* Full-time
Job function
* Engineering and Information Technology
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