Backend Software Engineer

The Company

Casavo is a next-generation digital real estate agency that leverages technology to simplify and expedite the process of buying and selling real estate. Our platform is used daily by hundreds of agents across Italy and France - and what you build will be at the core of how they work.

The Role: Learn by Building on a Real System

We are rebuilding Casavo’s technology foundation: a cleaner, modular architecture with clear domain boundaries and robust, predictable APIs. This is what enables AI agents and automations to work reliably across the stack.

You’ll help build the platform that powers Casavo AI.

To get there, we are migrating our core systems from a legacy Scala monolith to a modern Kotlin modular monolith.

You won’t be working on toy projects. From day one, you’ll contribute to production software, supported by a senior team that values mentorship, thoughtful code reviews, and blameless engineering.

If you’re early in your career, curious about backend systems, and motivated to write clean Kotlin on a product that matters, this role is for you.

Tech Stack

• Language & Core: Kotlin (Coroutines), JVM ecosystem
• Backend Frameworks: Ktor / http4k, REST APIs, OpenAPI
• Architecture: Kotlin modular monolith, domain-driven boundaries
• Database & Messaging: PostgreSQL, RabbitMQ
• Platform: Docker, AWS, Kubernetes
• Delivery & Collaboration: GitHub, automated build/test/deploy pipelines, code review workflow

What You'll Do

• Write and ship Kotlin code for our modular backend, with guidance from senior engineers
• Build clean REST APIs with solid error handling and OpenAPI documentation
• Write SQL queries and learn how indexing and pagination impact real production systems
• Help migrate business logic from our legacy Scala system
• Write automated tests as a natural part of your development workflow
• Participate in code reviews, architecture discussions, and team rituals

What We're Looking For

• Hands-on experience with at least one JVM language (Kotlin, Java, or Scala) — university projects, personal projects, or first-job experience all count
• Basic understanding of REST APIs and HTTP
• Familiarity with SQL and relational databases
• A pragmatic mindset: you value working software over theoretical perfection
• Good written and spoken English

Nice to have

• Experience with PostgreSQL
• Familiarity with basic Git commands (commit, push, rebase)
• Comfortable working with automated build, test, and deployment pipelines
• Curiosity about clean architecture and Domain-Driven Design (DDD)

What We Offer

• Structured mentorship from senior engineers on a real production migration
• Dedicated learning time during working hours (architecture deep-dives, knowledge-sharing sessions, individual study)
• ADR-driven, blameless engineering culture: decisions are documented, and mistakes are treated as learning opportunities
• Smart hybrid setup: 2 days/week in our Milan office for collaboration and whiteboarding, the rest focused async work
• Real impact from day one — your code ships to production and is used by real users every day