Xero

Senior Full Stack Engineer - AI Harness

Xero
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2 days ago
Wellington, New ZealandSenior

Responsibilities

  • Set up a local development harness with automated validation checks for safely handling 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 supporting an automated development lifecycle.
  • Design specifications, architectural solutions, and AI guardrails for safe software-agent implementation.
  • Collaborate with engineers and product partners, contribute to production support rotations, mentor team members, and document technical trade-offs.

Requirements

  • Deep full-stack or backend engineering experience with typed languages and ideally 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 complex relational database migrations.
  • Proven ability to take ambiguous technical problems from conception through production delivery.
  • Strong written communication for design records and technical documentation.
  • Collaborative mindset with an interest in sharing learning and uplifting team capabilities.

Benefits

  • Flexible remote-first work for candidates based in New Zealand, with office access in Wellington or Auckland.
  • Written-first, async-oriented collaboration with design records, paired kick-offs, and blameless reviews.
  • Supportive environment emphasizing technical curiosity, shared learning, and balanced collaboration.

Tech Stack

C#Microsoft SQL Server

Categories

Xero

About Xero

5,001-10,000 employees

Xero builds cloud-based accounting software for small businesses and their advisors, covering invoicing, bank reconciliation, payroll, expenses, and reporting. It sells subscriptions and supports an extensive ecosystem of connected bank feeds and third‑party apps via APIs and an app marketplace. Founded in 2006 and headquartered in Wellington, New Zealand, Xero is a public company dual‑listed on the NZX and ASX.

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