Backend Java Developer - Freelance

Full-time contract with flexible hours

Fully remote (with recurring meeting / retreats in northern Italy)

We are a fast‑growing, innovative startup looking for a Backend Developer (all levels) to join our team and help us build AI agents. Your mission : maintain / expand our server infrastructure and create integrations that make our AI agent accessible as a voice assistant, through email and WhatsApp.

Responsibilities

• Design, develop, and maintain backend services and APIs
• Build integrations to connect the AI agent with external communication channels :
• Voice : integrate telephony via technologies such as LiveKit (calls, speech input / output)
• Messaging : integrate with WhatsApp and email systems
• Implement and optimize real‑time communication flows using WebSockets
• Ensure scalability, reliability, and security of backend services
• Collaborate with frontend and AI engineering teams to deliver seamless multi‑channel experiences

Core Tech Stack

• Node.Js
• Hono (or similar frameworks like Express.Js)
• WebSockets
• TypeScript
• Postgres / Supabase (schema design, query optimization, migrations)
• REST APIs
• Integration Skills (not mandatory;

you can learn on the job

• Twilio / LiveKit (voice, SMS, call routing, WhatsApp)
• Email integration (like SMTP)
• Experience designing robust webhook flows and handling external APIs

Bonus Skills

• Experience or strong interest in AI / Context Engineering (OpenAI APIs, RAG systems)
• Docker, CI / CD pipelines, cloud services
• Event‑driven architectures (RabbitMQ, etc.)

Soft Skills

• Flexible mentality and adaptable in a startup environment
• Strong problem‑solving and debugging skills
• Passion for what you do
• Self‑discipline for remote work, with openness to in‑person meetups

Location

Must be able to attend periodic (every 6–8 weeks) in‑person meetings in northern Italy

What We Offer

• Space for fast professional growth
• Flexible and modern remote work environment
• Hands‑on experience with cutting‑edge technologies
• High‑impact role : your work directly shapes our product
• Young, friendly, and motivated team

Ready to transform hospitality tech with us? Send us your CV!