React Native Mobile Engineer $200k + super + bonus | Fintech AI | Sydney onsite

Let’s get straight to it.

This is not a keep things ticking over mobile role.

This is a build it properly, own it end to end, and make it world class role.

You’ll be joining one of Big Wave Digital’s premier partner clients, a high growth fintech business with real customers, real transaction volume, and real complexity.

They currently have around 40000 active users and are now looking to scale significantly from here. They are deep into an AI led transformation, rethinking how their platform behaves, how users interact, and how quickly they can ship.

No fluff.

No layers.

Just smart people building meaningful product at pace 🚀.

The Role

You own the entire mobile experience.

Not a feature.

Not a module.

The whole thing.

From architecture, to performance, to the feel of every interaction in a user’s hand.

You will set direction.

You will make the hard calls.

You will raise the bar across the team.

When customers open the app every day, every tap, every delay, every moment sits with you.

What You Will Be Doing

You will live in React Native and Expo, but this goes far beyond shipping screens.

You will:

Own the architecture, performance, and quality of the mobile application.

Define mobile engineering standards across the team.

Partner closely with Product and UX to create truly native feeling experiences.

Drive performance across real world conditions, including low bandwidth, older devices, and high usage.

Own the full release lifecycle across iOS and Android.

App Store, Google Play, Expo EAS, and OTA updates.

Establish patterns, tooling, and ways of working others follow.

Mentor and elevate engineers through leadership and example.

What Matters

This is a role for someone who genuinely cares about mobile craft.

You understand the difference between something that works and something that feels exceptional.

You likely:

Have deep commercial experience with React Native and Expo.

Understand the rendering pipeline, JS thread, and bridge behaviour.

Know how to diagnose and resolve real performance issues.

Have shipped production apps across iOS and Android.

Have owned the full lifecycle, from build to release to iteration.

Build with accessibility and usability as standard.

Think in systems, not just features.

Highly Relevant Experience

Fintech or financial platforms.

Trading environments or real time data.

High scale, high usage mobile products.

AI driven product or platform transformation 🤖.

The Environment

Let’s be clear upfront.

This is 5 days onsite in Sydney, non negotiable.

And it is by design.

This team moves quickly.

They collaborate in real time.

They solve problems together, in the room.

If you enjoy energy, pace, and high standards, you will thrive here.

If you prefer fully remote and slower cycles, this will not be the right fit.

Why This Role Stands Out

Most senior roles talk about influence.

This one gives you real ownership.

Most fintech apps evolve incrementally.

This one is being rebuilt with AI at the core.

Most mobile roles are part of a system.

Here, you help define how the system works.

If This Sounds Like You

You have built products you are proud of.

You care about performance and user experience.

you have debated the details because they matter.

And you are ready to take ownership of something that genuinely impacts users at scale 🌊.

About Big Wave Digital 🌊

Big Wave Digital are one of Australia’s leading tech and digital recruitment specialists, partnering with high growth startups, scale ups, and established brands across fintech, AI, SaaS, and digital platforms.

We focus on quality over quantity, deep networks, and genuinely understanding both clients and candidates.

If you are hiring, or looking to build a brilliant team, we would love to help.

Or reach out directly for a confidential conversation.

[email protected]