Senior Backend Engineer (.NET) (f/m/d)

<h1>Join Apaleo and Shape the Future of Hospitality Tech!</h1>
<p>Apaleo is the world's most open, API-first property management platform powering the next generation of hospitality operations. Its modular, AI-powered infrastructure enables hoteliers to customise their tech stack, automate routine work, and deliver seamless, personalised guest experiences, powered by best-in-class apps and autonomous AI agents that adapt to every stay.</p>
<p>We are looking for a <strong>Senior Backend Engineer (f/m/d)</strong> to build the foundation of Apaleo's market-facing API layer, bringing agentic booking into hospitality and enabling the next generation of guest-facing AI experiences.</p>
<p>This is a highly autonomous role where you will design and ship the <strong>Storefront API,</strong> a production-grade, scalable interface that allows external systems (like ChatGPT and booking platforms) to interact directly with Apaleo.</p>
<p>You'll operate at the intersection of <strong>backend engineering and AI</strong>, starting with clean API architecture and evolving into systems that power intelligent, agent-driven interactions.</p>
<h1>What You'll Be Up To</h1>
<h3><strong>Build the Storefront API from Scratch</strong></h3>
<ul>
<li>Design and implement a <strong>production-grade, multi-tenant API / MCP</strong></li>
<li>Enable seamless integration with external platforms and AI agents</li>
<li>Ensure scalability, reliability, and high performance from day one</li>
</ul>
<h3><strong>Own the Full API Lifecycle</strong></h3>
<ul>
<li>Define <strong>API schemas and contracts (OpenAPI)</strong></li>
<li>Implement <strong>versioning strategies and backward compatibility</strong></li>
<li>Design <strong>authentication, authorization, and security patterns</strong></li>
<li>Build <strong>rate limiting and usage controls</strong></li>
<li>Ensure strong <strong>documentation and developer experience</strong></li>
<li>Set up <strong>monitoring and observability</strong></li>
</ul>
<h3><strong>Work Across Distributed Systems</strong></h3>
<ul>
<li>Integrate with existing <strong>.NET microservices</strong></li>
<li>Connect to <strong>event-driven systems (Kafka or similar)</strong></li>
<li>Navigate and improve a <strong>complex distributed architecture</strong></li>
</ul>
<h3><strong>Operate in the Cloud</strong></h3>
<ul>
<li>Deploy and manage services in <strong>AWS</strong></li>
<li>Work with <strong>Docker and containerized environments</strong></li>
<li>Contribute to <strong>infrastructure as code practices</strong></li>
</ul>
<h3><strong>Collaborate on AI-Driven Use Cases</strong></h3>
<ul>
<li>Partner with AI engineers to enable <strong>agent-based workflows</strong></li>
<li>Build APIs that integrate with <strong>LLM-powered systems</strong></li>
<li>Help evolve the platform toward <strong>AI-native product capabilities</strong></li>
</ul>
<h3><strong>Shape Engineering Standards</strong></h3>
<ul>
<li>Define best practices for:
<ul>
<li>API design</li>
<li>S