Role overview

This senior engineering position is responsible for a critical delivery stream on MyXero, the foundational platform that processes hundreds of millions of daily requests for every organisation and user record at Xero. You will transform ambiguous platform challenges into durable architectural solutions, designing verification harnesses and AI guardrails that enable software agents to implement changes safely. Your work directly supports the modernisation of a massive system into decoupled domain services while maintaining stability across dependent products.

Key responsibilities

Set up an intentional local development harness with automated validation checks to safely handle production changes.
Refactor legacy monolith endpoints and services built on .NET Framework, C#, and SQL Server toward modern APIs.
Develop automated verification loops, test simulation harnesses, and tools that reduce operational toil and manual checks.
Build cloud agent tooling and collaborative workflows that support evolution toward an automated development lifecycle.
Mentor team members and shape engineering practices that operate safely with intelligent tools.
Ensure high reliability through engineered automated verification systems.

Requirements

Deep full-stack or backend engineering experience with typed languages, ideally including exposure to C# and .NET environments.
Hands-on exploration with AI harnesses, coding agents, or automated verification pipelines in a personal or professional setting.
Practical familiarity with distributed systems architecture, API design, data modeling, and managing complex relational database migrations.
Proven capability in taking ambiguous technical problems from initial conception through to production delivery.
Strong written communication skills to articulate system trade-offs clearly through design records and technical documentation.
Collaborative mindset with a drive to share learnings, uplift team capabilities, and contribute constructively to production support rotations.

What makes this role worth considering

You will join the MyXero Ghostbusters squad within the Identity and Platform group, collaborating with engineers and product partners primarily based across New Zealand. The team operates with a written-first, remote-first philosophy using design records, paired kick-offs, and blameless reviews to ensure every voice is heard. While delivery is high-tempo, the group maintains a supportive, open environment where technical curiosity and shared learning are core to daily work, with flexible remote-first setup and office access available in Wellington or Auckland.