Java Developer (Billing Systems)

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The project focuses on building a scalable and modular billing & invoicing system for enterprise environments.

The platform will manage cost calculation, invoice generation and payment collection, covering the full billing lifecycle — from transaction data ingestion to fiscal document generation — handling high data volumes and complex business logic, following strong modularity and separation-of-concerns principles.

We are looking for a Junior / Mid-level Java Developer with experience or strong exposure to billing and invoicing logic.

Technical Requirements

• Strong experience with Java and Spring framework
• Experience with Kill Bill platform or similar billing systems
• Solid knowledge of software design patterns and principles (MVC, SOLID, OOP)
• Experience in billing / invoicing domains
• Knowledge of Python
• Experience with DevOps tools (GitLab, Jenkins or similar)
• Understanding of accounting concepts (invoicing, credit notes, VAT, value dates, etc.)
• Knowledge of payment protocols and circuits (SEPA, credit cards, etc.)
• Team-oriented mindset and ability to collaborate effectively
• Strong problem-solving skills and ability to assess solution feasibility
• Ability to analyze large datasets
• Start: ASAP
• Duration: 6 months (extension possible)
• Location: Bologna – 3 days onsite per week

Seniority Level

Mid-Senior level

Employment Type

Full‑time

Job Function

JAVA DEVELOPER