Senior Engineer

About the role

This isn't just another "Senior Dev" role. In 2026, we know that the best engineers aren't just typing faster—they are orchestrating smarter. We are looking for a Senior Engineer to join the Supersonic team at Fingermark.

You’re the kind of engineer who has fully embraced the "Cyborg" era of development. You use tools like Claude Code, Cursor, and Agentic workflows to do the heavy lifting, allowing you to focus on high-level architecture, system integrity, and shipping at a speed that makes traditional teams' heads spin.

SENIOR ENGINEER (SUPERSONIC)

As a Senior Engineer, you’ll be a force multiplier within the Supersonic squad. You won't just be writing code; you’ll be defining how our team uses AI to build, test, and maintain a high-stakes ecommerce platform.

You’ll spend your time architecting self-healing systems on GCP, ensuring our kiosks running ChromeOS never skip a beat, and leading the charge in modernizing our dev practices. You are a mentor who shows the team how to use AI agents to refactor codebases in minutes rather than weeks, all while keeping a hawk-eye on code quality and system uptime.

We’re a Kiwi company with a global footprint, and we’re stoked to offer this role to anyone across New Zealand, Australia and the USA who wants to work remotely but stay deeply connected to a passionate team.

What will you be doing?

You’ll be a core part of the Supersonic team: our self-service ecommerce platform that handles high-throughput transactions for some of the world's biggest brands. When you're dealing with massive physical rollouts, "uptime" isn't a buzzword—it's the mission.

The role involves:

AI-Augmented Development: Leading the team in adopting agentic coding workflows (like Claude Code and Copilot Workspace) to increase velocity without sacrificing stability.

Architecting for Resilience: Building self-healing application architectures on GCP that can proactively manage edge-case failures at the kiosk level.

Edge Excellence: Deploying and managing high-performance React/Node apps to ChromeOS devices at the edge, ensuring they are snappy and reliable.

Rapid Prototyping: Turning "what if" into "here it is" by using AI tools to quickly spin up new features and opportunities for our customers.

Technical Leadership: Conducting peer reviews that focus on architectural integrity, ensuring that AI-generated code meets our high standards for security and scalability.

L3 Support: Assisting with high-level troubleshooting (with extra compensation for on-call) to keep the world’s kiosks humming.

Desired attributes & experience

We know the "perfect candidate" is a myth, but if you tick most of these boxes, we want to chat:

The AI Edge: You’re a power user of modern AI coding tools. You don’t just use them for snippets; you use them for multi-file refactors and autonomous debugging.

GCP Pro: Extensive experience with Google Cloud Platform (Cloud Run, Firestore, Pub/Sub, etc.). You know your way around GCP like the back of your hand.

The Stack: A specialist in ReactJS and Node.js (both with TypeScript). You love clean, type-safe code.

Edge Focus: Experience deploying to hardware at the edge, specifically Google ChromeOS or similar locked-down environments.

Architectural Mindset: You think in terms of "Self-Healing." You’ve built systems that can recover from network drops or service outages without human intervention.

Infrastructure as Code: Experience with Pulumi or Terraform to keep our GCP environments consistent and reproducible.

Polished UI: You care about the "feel." Experience with Tailwind, Framer Motion, or specialized data vis (D3) is a huge plus.

Mentorship: You enjoy levelling up the devs around you and sharing the latest "pro-tips" on how to get more out of our AI toolchain.

Core competencies

Technical Leverage: The ability to use AI to do the work of three people while maintaining the quality of a senior lead.

Problem Solving: You don't just fix bugs; you find out why they happened and build a system so they never happen again.

Communication: Clear, concise, and ego-free. Whether it’s in a Slack thread or a deep-dive architectural doc.

Speed & Agility: You thrive in an environment where we pivot quickly to grab new opportunities.