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The Flex

Backend Engineer – Full-time - Remote

The Flex, Wind Lake, Wisconsin, United States

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Reinvent How The World Rents At The Flex, we believe renting a home should be as effortless as ordering an Uber. Our mission: make renting borderless, instant, and intelligent. Through Base360.ai, our proprietary platform, we’re building the digital nervous system of the rental world — connecting property data, automating operations, and creating the intelligent infrastructure that powers every stay, everywhere.

We’re looking for a Backend Engineer who thrives on automation, scalability, and impact — someone who can turn complex real-world systems into elegant, self‑sustaining software.

What You’ll Build As a Backend Engineer, you’ll design and scale the backbone of The Flex — the APIs, automations, and intelligence layers that connect global booking platforms, power predictive insights, and orchestrate real‑world logistics. Your work will bridge digital intelligence and physical operations — enabling thousands of seamless stays to happen automatically, without human intervention.

Your Mission

Architect Core Systems – Build scalable, high-performance APIs and backend services that drive global bookings, payments, and property data synchronization.

Automate Operations – Create microservices and serverless functions that remove repetitive manual processes and enhance efficiency.

Integrate Intelligently – Connect Base360.ai with platforms like Airbnb, Stripe, Twilio, and Hostaway through robust, maintainable integrations.

Design for Scale – Build fault-tolerant, event‑driven systems and data pipelines capable of handling millions of transactions across borders.

Enhance Intelligence – Collaborate with AI and data teams to embed predictive automation into operational workflows.

Collaborate for Impact – Partner with product, operations, and front‑end teams to turn complex real-world challenges into clean, scalable backend solutions.

You’re a Great Fit If You Have

Strong experience with Node.js, Python (FastAPI), and AWS (serverless stack preferred).

Proven track record designing and scaling API-first architectures.

Deep understanding of databases, data synchronization, and event‑driven systems.

Curiosity for automation, AI, and real estate technology.

A systems‑thinker mindset — you design for resilience, not just function.

A bias for action — you thrive in fast-moving, high‑accountability environments.

Why You’ll Love It Here

Massive Impact – Your systems will power thousands of stays and automate the backbone of a $4 T global industry.

Global Mission, Lean Team – No bureaucracy. No silos. Just high performers moving fast.

Autonomy & Growth – Own projects end‑to‑end and shape our technical roadmap.

Performance‑Driven Rewards – Competitive compensation and meaningful upside for top contributors.

Remote‑First Culture – Work from anywhere. We care about output, not office hours.

Do Not Apply If

You’re looking for a slow, predictable 9–5.

You prefer meetings over momentum.

You’re satisfied with average code and average results.

You’re not striving to operate in the top 1 % of your craft.

Seniority level Mid‑Senior level

Employment type Full‑time

Job function Engineering and Information Technology

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