Staff Engineer

At Marsello, we're building the Loyalty Marketing Platform that helps retailers and hospitality brands grow loyal customers wherever they are. More than 2,000 brands around the world use Marsello to deliver personalised marketing, loyalty and customer engagement experiences that drive measurable results.

We're looking for a Staff Engineer to help shape the future of our platform, our engineering practices, and how we use AI to build software. 

This is the most senior individual contributor role in our engineering team. You'll partner closely with our CTO, contribute to executive-level conversations when needed, and help set the technical direction for Marsello.

How we work

Marsello's engineering team operates using an agentic engineering model. Every engineer uses AI agents as part of their daily workflow.

Success here isn't measured by how much code you personally write. It's measured by how effectively you can define problems, orchestrate agents, review outputs, create reusable patterns, and help the whole team move faster.

We're looking for someone who is excited about shaping what modern software engineering looks like in an AI-first environment.

What you'll do

You'll lead the work that matters across the entire platform — from architecture and infrastructure through to AI-enabled engineering practices.

You'll:

• Set technical direction across our product, platform and infrastructure
• Lead complex, cross-cutting initiatives that span multiple systems and teams
• Drive architectural decisions and major technology investments
• Own and improve our AWS and Terraform environments, with a focus on reliability, security, observability and cost efficiency
• Help define how we use AI coding agents, prompts, evals and review processes across the engineering team
• Set the standard for engineering excellence across the team, providing technical leadership that Senior Engineers look to for guidance while mentoring and developing engineers at all levels.
• Partner closely with Product, Customer Success and Leadership to balance customer needs, business goals and technical realities
• Jump into the toughest incidents, bugs and technical challenges when the team needs an experienced hand
• Take part in our engineering support rotation and use what you learn to improve the platform
  
  

What we're looking for

• Ideally 8+ years building and shipping software in SaaS environments
• Experience operating at Senior, Lead, Principal or Staff Engineer level
• Strong expertise with C#, .NET, Web APIs, MongoDB and React/TypeScript
• Deep hands-on experience with AWS and Terraform
• A track record of making architectural decisions in mature production systems
• Experience using AI tools, coding agents, prompts, evals or similar workflows in real-world software development
• Strong commercial judgement and an understanding of how technical decisions impact business outcomes
• Excellent communication skills and the ability to influence across engineering, product and leadership teams
• A collaborative mindset and a genuine desire to make the people around you more effective
  
  

Why Marsello?

You'll join a high-performing, globally distributed team with a strong culture, meaningful product challenges, and the opportunity to shape both our technology and the way we build software.

We're open to candidates based anywhere in New Zealand. While we're a remote-first organisation, we have a preference for candidates based in Wellington, as opportunities for occasional in-person collaboration can be valuable for a role with broad technical and organisational impact.

If you're excited by large technical problems, modern AI-assisted engineering, and the chance to have a significant impact on the direction of a growing SaaS business, we'd love to hear from you.