Backend Engineer (Platform)

Sunollo is building a premium residential energy platform that combines high-quality hardware, reliable installation operations, and software to make clean energy simple for homes in Singapore.

We are looking for a Backend Engineer (Platform) to design, build, and own revenue-critical backend systems. The initial focus of this role is to build the foundation of our billing platform, followed by broader platform and internal systems.

This role is suitable for a senior backend engineer who enjoys high ownership, clear scope, and building production systems that are reliable and maintainable.

Key Responsibilities

• Design and implement backend systems that are revenue-critical and operationally important
• Build a billing and invoicing engine supporting subscriptions and milestone-based payments
• Design clean, auditable data models and event logs with replay safety
• Integrate with third-party systems such as Xero using ...