Senior Software Engineer

About the Company

Fonoa is the Tax Operating System for autonomous tax. We provide modular infrastructure covering the full indirect tax lifecycle, including tax ID validation, real-time tax determination, e-invoicing, and returns. Trusted by companies like Canva, Netflix, Spotify, Uber, Zoom, and Booking.com.

Responsibilities

• Design and build integrations connecting Fonoa with ERPs, billing platforms, and procurement systems
• Solve complex integration challenges involving large external APIs and inconsistent data models
• Shape how the platform integrates into core enterprise workflows like Order-to-Cash and Procure-to-Pay
• Work closely with engineering, product, and customers to translate business workflows into scalable product capabilities
• Ship fast, continuously, and iteratively while maintaining high reliability and correctness

Requirements

• Experience building or operating integrations with enterprise systems (ERPs, billing platforms, or large financial systems)
• Understanding of enterprise business processes such as Order-to-Cash (O2C) and Procure-to-Pay (P2P)
• Hands-on experience with at least one ERP or enterprise platform
• Proficiency in English (written and spoken)
• Ability to work with complex external APIs, large data models, and distributed systems
• Strong sense of ownership and a builder mindset
• Comfort with fast-changing environments and evolving priorities