Full-Stack Engineer (Web & APIs)

The Flex; Remote; IDR 200.000.000 - 300.000.000; Full time

Job summary

A modern rental platform is seeking a Full-Stack Engineer to design and scale web applications and APIs. This role involves developing automated workflows and integrating with partners like Airbnb and Stripe. Candidates should have strong skills in Node.js, React, and AWS, with a focus on building clean, scalable systems. The company values rapid growth, real-world impact, and offers a remote-first work environment with competitive rewards.

Benefits

Competitive compensation

Remote-first work model

Opportunity for meaningful impact in a large industry

Qualifications

• Strong experience with Node.js and React.
• Solid understanding of API-first architectures and distributed systems.
• Experience with Python / FastAPI preferred for automation.

Responsibilities

• Develop scalable web applications and APIs that power bookings and payments.
• Architect APIs that connect Base360.ai to tools and partners.
• Build automated workflows that eliminate manual operations.

Skills

Node.js

React

AWS (serverless)

API-first architectures

Distributed systems

Python / FastAPI

Job description

Overview

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

As a Full-Stack Engineer (Web & APIs), you will design, build, and scale the core web applications and APIs behind The Flex platform — powering instant bookings, intelligent access, automated workflows, and predictive operations. You will work end-to-end across frontend interfaces, backend services, and cloud infrastructure, turning complex operational challenges into clean, scalable, API-first systems. You won’t just ship features. You’ll create leverage, unlock automation, and architect the foundation of an intelligent, global rental ecosystem.

Your Mission

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