Senior Backend Engineer

In questa role, you contribute to migrating Casavo's core backend from a Scala monolith to a Kotlin modular architecture. You will design domain boundaries and build robust, AI-ready REST APIs that scale with growing data and external integrations. You collaborate across teams to ensure zero-downtime migrations and reliable communication with other services. You shape the platform for a future where AI tools and automations safely consume Casavo APIs. You will work in a pragmatic, quality-driven environment that values clean code and continuous learning.Retribuzione / Benefits

• Develop the Modular Monolith in Kotlin with clear domain boundaries
• Migrate and modernize legacy Scala logic to the new Kotlin architecture with zero downtime
• Design and implement cross-system integrations with Casavo services
• Build robust, AI-ready REST APIs with RFC 7807 error handling and OpenAPI specs
• Implement safe pagination and efficient PostgreSQL queries for scalable data access
• Collaborate with frontend, product, and engineering teams to ship features iteratively

• Experience in JVM backend development; Kotlin preferred but Java/Scala acceptable
• Hands-on API craftsmanship: REST, idempotency, proper verbs, clear errors
• Relational database experience (PostgreSQL/MySQL); understanding of indexing and query performance
• Comfort with reading legacy code (Scala) and migrating it
• Test-driven mindset with automated testing
• Good written and spoken English

• focus on architecture deep-dives
• dedicated learning time
• blameless post-mortems
• 2 days in Milan office for collaboration
• end-to-end ownership of features