Full-Stack Engineer (Web & APIs) in Belfast
Full-Stack Engineer (Web & APIs)

Full-Stack Engineer (Web & APIs) in Belfast

Belfast Full-Time 36000 - 60000 ÂŁ / year (est.) No home office possible
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At a Glance

  • Tasks: Design and build scalable web applications and APIs for a seamless rental experience.
  • Company: Join The Flex, a pioneering company transforming the rental industry.
  • Benefits: Competitive pay, remote work, and opportunities for rapid growth.
  • Why this job: Make a real-world impact in a multi-trillion-pound industry with innovative technology.
  • Qualifications: Experience with Node.js, React, AWS, and a passion for automation.
  • Other info: Enjoy a small team environment with big ownership and minimal bureaucracy.

The predicted salary is between 36000 - 60000 ÂŁ per year.

At The Flex, we believe renting a home should feel instant, intelligent, and effortless — as seamless as booking a ride. Our ambition is bold: enabling anyone to live anywhere, anytime, without friction. Powered by Base360.ai, our proprietary automation engine, we are building the operating system for modern renting — connecting property data, orchestrating operations, and enabling seamless stays across continents. If you’re energized by web platforms, API-driven systems, automation, and real-world scale, this is your opportunity to shape how millions of people move, live, and experience the world.

What You’ll Build

  • Build the Platform — Develop fast, reliable, and scalable web applications and APIs that power bookings, payments, availability, and guest experiences.
  • Design API-First Systems — Architect robust, well-documented APIs that connect Base360.ai to internal tools and external partners.
  • Automate at Scale — Build event-driven services and automated workflows that eliminate manual operations across the business.
  • Connect the Ecosystem — Deliver high-impact integrations with partners such as Airbnb, Stripe, Hostaway, and Twilio.
  • Deploy with Confidence — Ship and maintain serverless infrastructure on AWS, optimized for speed, resilience, and global scale.
  • Solve Real Problems — Tackle real-time booking synchronization, pricing intelligence, keyless access logic, AI-powered alerts, and live operational dashboards.
  • Build With Purpose — Collaborate closely with product, data, and operations teams to turn ideas into measurable, real-world impact.

You’re a Great Fit If You Have

  • Strong experience with Node.js, React, and AWS (serverless).
  • A solid understanding of API-first architectures and distributed systems.
  • Experience with Python / FastAPI for automation or data services (bonus).
  • A proven ability to build clean, scalable, production-ready web and API systems.
  • Curiosity about automation, AI-driven operations, and property technology.
  • A strong execution mindset — you ship fast, learn quickly, and enjoy solving complex problems.

Why You’ll Love Working Here

  • Real-World Impact — Your work will power thousands of stays and help redefine a multi-trillion-pound industry.
  • Small Team, Big Ownership — Minimal bureaucracy, high trust, and the chance to build foundational systems from day one.
  • Rapid Growth — Fast iteration, continuous learning, and a culture that values technical excellence.
  • Performance-Based Rewards — Competitive compensation with meaningful upside for exceptional contributors.
  • Remote-First — Work from anywhere — we measure outcomes, not hours.

This Role Is Not for You If

  • You want a slow, predictable 9–5.
  • You prefer planning over building.
  • “Good enough” is your standard.
  • You’re not committed to becoming elite in your craft.

Full-Stack Engineer (Web & APIs) in Belfast employer: The Flex

At The Flex, we pride ourselves on being an exceptional employer that empowers our Full-Stack Engineers to make a real-world impact in the dynamic rental industry. With a remote-first culture, minimal bureaucracy, and a strong emphasis on technical excellence, we offer competitive compensation and significant growth opportunities for those eager to innovate and shape the future of living. Join us to build foundational systems that will redefine how millions experience renting, all while enjoying the flexibility to work from anywhere.
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Contact Detail:

The Flex Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Full-Stack Engineer (Web & APIs) in Belfast

✨Tip Number 1

Network like a pro! Reach out to people in the industry, attend meetups, and connect with potential colleagues on LinkedIn. We all know that sometimes it’s not just what you know, but who you know that can help you land that dream job.

✨Tip Number 2

Show off your skills! Create a portfolio showcasing your projects, especially those involving Node.js, React, and AWS. We want to see what you can do, so make sure your work is easily accessible and highlights your best achievements.

✨Tip Number 3

Prepare for interviews by practising common technical questions and coding challenges. We recommend using platforms like LeetCode or HackerRank to sharpen your skills. The more prepared you are, the more confident you’ll feel when it’s time to shine!

✨Tip Number 4

Apply through our website! It’s the best way to ensure your application gets noticed. Plus, we love seeing candidates who take the initiative to engage directly with us. Don’t hesitate—your future at The Flex could be just a click away!

We think you need these skills to ace Full-Stack Engineer (Web & APIs) in Belfast

Node.js
React
AWS (serverless)
API-first Architectures
Distributed Systems
Python
FastAPI
Automation
Data Services
Clean Code Practices
Scalable Web Applications
Problem-Solving Skills
Collaboration
Curiosity about AI-driven Operations

Some tips for your application 🫡

Show Your Passion for Automation: When you're writing your application, let us see your enthusiasm for automation and AI-driven operations. Share examples of how you've tackled complex problems in the past, especially in web platforms or API systems. We love seeing that spark!

Be Clear and Concise: Keep your application straightforward and to the point. We appreciate clarity, so make sure to highlight your experience with Node.js, React, and AWS without fluff. Remember, we want to know how you can contribute to our mission right from the start!

Tailor Your Application: Make sure to customise your application to reflect the job description. Mention specific projects or experiences that align with building scalable web applications and APIs. This shows us that you understand what we're looking for and how you fit into our vision.

Apply Through Our Website: Don't forget to apply through our website! It’s the best way for us to receive your application and ensures it gets the attention it deserves. Plus, it makes the whole process smoother for both of us!

How to prepare for a job interview at The Flex

✨Know Your Tech Stack

Make sure you’re well-versed in Node.js, React, and AWS. Brush up on your understanding of API-first architectures and distributed systems. Being able to discuss your experience with these technologies confidently will show that you’re a great fit for the role.

✨Showcase Your Problem-Solving Skills

Prepare examples of how you've tackled complex problems in previous projects. Think about real-time booking synchronization or automated workflows you've built. This will demonstrate your execution mindset and ability to deliver impactful solutions.

✨Understand The Flex's Vision

Familiarise yourself with The Flex’s mission to revolutionise renting. Be ready to discuss how your skills can contribute to their goal of creating an intelligent, global rental ecosystem. Showing genuine interest in their vision will set you apart.

✨Ask Insightful Questions

Prepare thoughtful questions about the team dynamics, the technology stack, and future projects. This not only shows your enthusiasm but also helps you gauge if the company culture aligns with your values, especially their focus on rapid growth and minimal bureaucracy.

Full-Stack Engineer (Web & APIs) in Belfast
The Flex
Location: Belfast
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  • Full-Stack Engineer (Web & APIs) in Belfast

    Belfast
    Full-Time
    36000 - 60000 ÂŁ / year (est.)
  • T

    The Flex

    50-100
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