Founding Software Engineer — AI Platform Architect

The Flex; Denmark; On-site; DKK 1,000,000 - 1,600,000; Full time

Benefits offered by this job

Remote-first work

Job summary

The Flex is seeking a Founding Software Engineer to architect and build Base360.ai, the operating system for modern renting. You will work directly with the founder, shape product strategy, and own critical architectural decisions from day one.

You’ll develop AI-powered workflows and scalable booking systems, automate operations, and create integrations with partners like Stripe and OpenAI, enabling revenue growth and global expansion.

Qualifications

• Strong software engineering fundamentals.
• Experience building production-grade applications.
• Strong understanding of APIs, databases, and system design.
• Product mindset and customer obsession.
• Ability to work independently with minimal supervision.
• Strong problem-solving ability.
• High level of ownership and accountability.

Responsibilities

• Design, build, and launch core software powering bookings, pricing, payments, operations, communications, and guest experiences.
• Architect the platform and long-term architecture of Base360.ai.
• Create automation at scale across multiple countries and thousands of stays.
• Build AI-powered tools, agents, and workflows to improve productivity and customer experience.
• Integrate with platforms including Airbnb, Hostaway, Stripe, Twilio, Google, OpenAI, and others.
• Move fast with ownership, turning ideas into production-ready solutions.

Skills

Software fundamentals

Production-grade apps

APIs & DBs

System design

Product mindset

Independence

Problem solving

Ownership

AI integrations

SaaS products

FastAPI

React

AWS

Tools

FastAPI

React

AWS

Job description

The Flex is seeking a Founding Software Engineer to architect and build Base360.ai, the operating system for modern renting. You will work directly with the founder, shape product strategy, and own critical architectural decisions from day one.

You’ll develop AI-powered workflows and scalable booking systems, automate operations, and create integrations with partners like Stripe and OpenAI, enabling revenue growth and global expansion.