Senior Full Stack Software Engineer
Location: Belfast, Northern Ireland, United Kingdom
Apply to join The Flex—a global rental platform powered by Base360.ai that turns property data into frictionless living experiences.
What You’ll Build
* Engineer the backbone of The Flex platform—services, APIs, and automation engines that enable bookings, payments, and operations worldwide.
* Design scalable, resilient, and intelligent systems from backend, data pipelines, cloud infra, to integration layers.
* Collaborate with product, operations, and data to automate messy logistics into clean workflows.
* Architect and deliver microservices and serverless workflows that eliminate manual processes across cities.
* Scale the platform to handle high volumes of real‑time transactions with reliability.
* Integrate Base360.ai with partners like Airbnb, Stripe, Twilio, and Hostaway.
* Apply AI and predictive logic to core systems.
* Lead by mentoring teammates, setting engineering standards, and driving excellence.
Who You Are
* 5+ years of software engineering experience (backend or full stack).
* Strong skills in Node.js, Python (FastAPI), and AWS serverless architectures.
* Experience designing API‑first systems and event‑driven pipelines.
* Deep knowledge of distributed systems, databases, and high‑scale automation.
* Curiosity for AI, property tech, and real‑world operational systems.
* A bias for action—fast, clear, reliable delivery.
Why You’ll Love It
* Huge real‑world impact—automate operations for thousands of stays across multiple countries.
* A global mission and fast team—minimal bureaucracy, maximum autonomy.
* Ownership from day one—own major parts of the stack and shape the roadmap.
* Merit‑based rewards—competitive compensation and meaningful equity.
* Remote‑first environment—work from anywhere.
Not for You If
* You prefer slow, predictable environments.
* You need constant meetings instead of building.
* You are happy shipping average code.
* You are not aiming to become elite in your craft.
Seniority level
Mid‑Senior level
Employment type
Full‑time
Job function
Engineering and Information Technology
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